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Data Fields
AVCodecContext Struct Reference

main external API structure. More...

#include <avcodec.h>

Data Fields

const AVClassav_class
 information on struct for av_log More...
 
int log_level_offset
 
enum AVMediaType codec_type
 
const struct AVCodeccodec
 
enum AVCodecID codec_id
 
unsigned int codec_tag
 fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A'). More...
 
voidpriv_data
 
struct AVCodecInternalinternal
 Private context used for internal data. More...
 
voidopaque
 Private data of the user, can be used to carry app specific stuff. More...
 
int64_t bit_rate
 the average bitrate More...
 
int bit_rate_tolerance
 number of bits the bitstream is allowed to diverge from the reference. More...
 
int global_quality
 Global quality for codecs which cannot change it per frame. More...
 
int compression_level
 
int flags
 AV_CODEC_FLAG_*. More...
 
int flags2
 AV_CODEC_FLAG2_*. More...
 
uint8_textradata
 some codecs need / can use extradata like Huffman tables. More...
 
int extradata_size
 
AVRational time_base
 This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented. More...
 
int ticks_per_frame
 For some codecs, the time base is closer to the field rate than the frame rate. More...
 
int delay
 Codec delay. More...
 
int width
 picture width / height. More...
 
int height
 
int coded_width
 Bitstream width / height, may be different from width/height e.g. More...
 
int coded_height
 
int gop_size
 the number of pictures in a group of pictures, or 0 for intra_only More...
 
enum AVPixelFormat pix_fmt
 Pixel format, see AV_PIX_FMT_xxx. More...
 
void(* draw_horiz_band )(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
 If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band. More...
 
enum AVPixelFormat(* get_format )(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
 callback to negotiate the pixelFormat More...
 
int max_b_frames
 maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 relative to the input. More...
 
float b_quant_factor
 qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset). More...
 
attribute_deprecated int b_frame_strategy
 
float b_quant_offset
 qscale offset between IP and B-frames More...
 
int has_b_frames
 Size of the frame reordering buffer in the decoder. More...
 
attribute_deprecated int mpeg_quant
 
float i_quant_factor
 qscale factor between P- and I-frames If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset). More...
 
float i_quant_offset
 qscale offset between P and I-frames More...
 
float lumi_masking
 luminance masking (0-> disabled) More...
 
float temporal_cplx_masking
 temporary complexity masking (0-> disabled) More...
 
float spatial_cplx_masking
 spatial complexity masking (0-> disabled) More...
 
float p_masking
 p block masking (0-> disabled) More...
 
float dark_masking
 darkness masking (0-> disabled) More...
 
int slice_count
 slice count More...
 
attribute_deprecated int prediction_method
 
intslice_offset
 slice offsets in the frame in bytes More...
 
AVRational sample_aspect_ratio
 sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel. More...
 
int me_cmp
 motion estimation comparison function More...
 
int me_sub_cmp
 subpixel motion estimation comparison function More...
 
int mb_cmp
 macroblock comparison function (not supported yet) More...
 
int ildct_cmp
 interlaced DCT comparison function More...
 
int dia_size
 ME diamond size & shape. More...
 
int last_predictor_count
 amount of previous MV predictors (2a+1 x 2a+1 square) More...
 
attribute_deprecated int pre_me
 
int me_pre_cmp
 motion estimation prepass comparison function More...
 
int pre_dia_size
 ME prepass diamond size & shape. More...
 
int me_subpel_quality
 subpel ME quality More...
 
int me_range
 maximum motion estimation search range in subpel units If 0 then no limit. More...
 
int slice_flags
 slice flags More...
 
int mb_decision
 macroblock decision mode More...
 
uint16_t * intra_matrix
 custom intra quantization matrix More...
 
uint16_t * inter_matrix
 custom inter quantization matrix More...
 
attribute_deprecated int scenechange_threshold
 
attribute_deprecated int noise_reduction
 
int intra_dc_precision
 precision of the intra DC coefficient - 8 More...
 
int skip_top
 Number of macroblock rows at the top which are skipped. More...
 
int skip_bottom
 Number of macroblock rows at the bottom which are skipped. More...
 
int mb_lmin
 minimum MB Lagrange multiplier More...
 
int mb_lmax
 maximum MB Lagrange multiplier More...
 
attribute_deprecated int me_penalty_compensation
 
int bidir_refine
 
attribute_deprecated int brd_scale
 
int keyint_min
 minimum GOP size More...
 
int refs
 number of reference frames More...
 
attribute_deprecated int chromaoffset
 
int mv0_threshold
 Note: Value depends upon the compare function used for fullpel ME. More...
 
attribute_deprecated int b_sensitivity
 
enum AVColorPrimaries color_primaries
 Chromaticity coordinates of the source primaries. More...
 
enum AVColorTransferCharacteristic color_trc
 Color Transfer Characteristic. More...
 
enum AVColorSpace colorspace
 YUV colorspace type. More...
 
enum AVColorRange color_range
 MPEG vs JPEG YUV range. More...
 
enum AVChromaLocation chroma_sample_location
 This defines the location of chroma samples. More...
 
int slices
 Number of slices. More...
 
enum AVFieldOrder field_order
 Field order. More...
 
int sample_rate
 samples per second More...
 
int channels
 number of audio channels More...
 
enum AVSampleFormat sample_fmt
 audio sample format More...
 
int frame_size
 Number of samples per channel in an audio frame. More...
 
int frame_number
 Frame counter, set by libavcodec. More...
 
int block_align
 number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs. More...
 
int cutoff
 Audio cutoff bandwidth (0 means "automatic") More...
 
uint64_t channel_layout
 Audio channel layout. More...
 
uint64_t request_channel_layout
 Request decoder to use this channel layout if it can (0 for default) More...
 
enum AVAudioServiceType audio_service_type
 Type of service that the audio stream conveys. More...
 
enum AVSampleFormat request_sample_fmt
 desired sample format More...
 
int(* get_buffer2 )(struct AVCodecContext *s, AVFrame *frame, int flags)
 This callback is called at the beginning of each frame to get data buffer(s) for it. More...
 
attribute_deprecated int refcounted_frames
 If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted and are valid indefinitely. More...
 
float qcompress
 amount of qscale change between easy & hard scenes (0.0-1.0) More...
 
float qblur
 amount of qscale smoothing over time (0.0-1.0) More...
 
int qmin
 minimum quantizer More...
 
int qmax
 maximum quantizer More...
 
int max_qdiff
 maximum quantizer difference between frames More...
 
int rc_buffer_size
 decoder bitstream buffer size More...
 
int rc_override_count
 ratecontrol override, see RcOverride More...
 
RcOverriderc_override
 
int64_t rc_max_rate
 maximum bitrate More...
 
int64_t rc_min_rate
 minimum bitrate More...
 
float rc_max_available_vbv_use
 Ratecontrol attempt to use, at maximum, of what can be used without an underflow. More...
 
float rc_min_vbv_overflow_use
 Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow. More...
 
int rc_initial_buffer_occupancy
 Number of bits which should be loaded into the rc buffer before decoding starts. More...
 
attribute_deprecated int coder_type
 
attribute_deprecated int context_model
 
attribute_deprecated int frame_skip_threshold
 
attribute_deprecated int frame_skip_factor
 
attribute_deprecated int frame_skip_exp
 
attribute_deprecated int frame_skip_cmp
 
int trellis
 trellis RD quantization More...
 
attribute_deprecated int min_prediction_order
 
attribute_deprecated int max_prediction_order
 
attribute_deprecated int64_t timecode_frame_start
 
attribute_deprecated void(* rtp_callback )(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
 
attribute_deprecated int rtp_payload_size
 
attribute_deprecated int mv_bits
 
attribute_deprecated int header_bits
 
attribute_deprecated int i_tex_bits
 
attribute_deprecated int p_tex_bits
 
attribute_deprecated int i_count
 
attribute_deprecated int p_count
 
attribute_deprecated int skip_count
 
attribute_deprecated int misc_bits
 
attribute_deprecated int frame_bits
 
char * stats_out
 pass1 encoding statistics output buffer More...
 
char * stats_in
 pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here. More...
 
int workaround_bugs
 Work around bugs in encoders which sometimes cannot be detected automatically. More...
 
int strict_std_compliance
 strictly follow the standard (MPEG-4, ...). More...
 
int error_concealment
 error concealment flags More...
 
int debug
 debug More...
 
int err_recognition
 Error recognition; may misdetect some more or less valid parts as errors. More...
 
int64_t reordered_opaque
 opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque More...
 
const struct AVHWAccelhwaccel
 Hardware accelerator in use. More...
 
voidhwaccel_context
 Hardware accelerator context. More...
 
uint64_t error [AV_NUM_DATA_POINTERS]
 error More...
 
int dct_algo
 DCT algorithm, see FF_DCT_* below. More...
 
int idct_algo
 IDCT algorithm, see FF_IDCT_* below. More...
 
int bits_per_coded_sample
 bits per sample/pixel from the demuxer (needed for huffyuv). More...
 
int bits_per_raw_sample
 Bits per sample/pixel of internal libavcodec pixel/sample format. More...
 
int lowres
 low resolution decoding, 1-> 1/2 size, 2->1/4 size More...
 
attribute_deprecated AVFramecoded_frame
 the picture in the bitstream More...
 
int thread_count
 thread count is used to decide how many independent tasks should be passed to execute() More...
 
int thread_type
 Which multithreading methods to use. More...
 
int active_thread_type
 Which multithreading methods are in use by the codec. More...
 
int thread_safe_callbacks
 Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding. More...
 
int(* execute )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
 The codec may call this to execute several independent things. More...
 
int(* execute2 )(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
 The codec may call this to execute several independent things. More...
 
int nsse_weight
 noise vs. More...
 
int profile
 profile More...
 
int level
 level More...
 
enum AVDiscard skip_loop_filter
 Skip loop filtering for selected frames. More...
 
enum AVDiscard skip_idct
 Skip IDCT/dequantization for selected frames. More...
 
enum AVDiscard skip_frame
 Skip decoding for selected frames. More...
 
uint8_tsubtitle_header
 Header containing style information for text subtitles. More...
 
int subtitle_header_size
 
attribute_deprecated uint64_t vbv_delay
 VBV delay coded in the last frame (in periods of a 27 MHz clock). More...
 
attribute_deprecated int side_data_only_packets
 Encoding only and set by default. More...
 
int initial_padding
 Audio only. More...
 
AVRational framerate
 
enum AVPixelFormat sw_pix_fmt
 Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx. More...
 
AVRational pkt_timebase
 Timebase in which pkt_dts/pts and AVPacket.dts/pts are. More...
 
const AVCodecDescriptorcodec_descriptor
 AVCodecDescriptor. More...
 
int64_t pts_correction_num_faulty_pts
 Current statistics for PTS correction. More...
 
int64_t pts_correction_num_faulty_dts
 Number of incorrect PTS values so far. More...
 
int64_t pts_correction_last_pts
 Number of incorrect DTS values so far. More...
 
int64_t pts_correction_last_dts
 PTS of the last frame. More...
 
char * sub_charenc
 DTS of the last frame. More...
 
int sub_charenc_mode
 Subtitles character encoding mode. More...
 
int skip_alpha
 Skip processing alpha if supported by codec. More...
 
int seek_preroll
 Number of samples to skip after a discontinuity. More...
 
int debug_mv
 debug motion vectors More...
 
uint16_t * chroma_intra_matrix
 custom intra quantization matrix More...
 
uint8_tdump_separator
 dump format separator. More...
 
char * codec_whitelist
 ',' separated list of allowed decoders. More...
 
unsigned properties
 Properties of the stream that gets decoded. More...
 
AVPacketSideDatacoded_side_data
 Additional data associated with the entire coded stream. More...
 
int nb_coded_side_data
 
AVBufferRefhw_frames_ctx
 A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames. More...
 
int sub_text_format
 Control the form of AVSubtitle.rects[N]->ass. More...
 
int trailing_padding
 Audio only. More...
 
int64_t max_pixels
 The number of pixels per image to maximally accept. More...
 
AVBufferRefhw_device_ctx
 A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/decoder. More...
 
int hwaccel_flags
 Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated decoding (if active). More...
 
int apply_cropping
 Video decoding only. More...
 
int extra_hw_frames
 

Detailed Description

main external API structure.

New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user applications. The name string for AVOptions options matches the associated command line parameter name and can be found in libavcodec/options_table.h The AVOption/command line parameter names differ in some cases from the C structure field names for historic reasons or brevity. sizeof(AVCodecContext) must not be used outside libav*.

Examples:
decode_audio.c, decode_video.c, demuxing_decoding.c, encode_audio.c, encode_video.c, filtering_audio.c, filtering_video.c, hw_decode.c, muxing.c, qsvdec.c, transcode_aac.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1533 of file avcodec.h.

Field Documentation

const AVClass* AVCodecContext::av_class

information on struct for av_log

  • set by avcodec_alloc_context3

Definition at line 1538 of file avcodec.h.

Referenced by init_context_defaults().

int AVCodecContext::log_level_offset

Definition at line 1539 of file avcodec.h.

enum AVMediaType AVCodecContext::codec_type
const struct AVCodec* AVCodecContext::codec
Examples:
muxing.c, and transcoding.c.

Definition at line 1542 of file avcodec.h.

Referenced by a64multi_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_frame(), adpcm_encode_init(), alloc_frame_buffer(), amf_copy_buffer(), amf_init_encoder(), apply_param_change(), aptx_init(), avcodec_close(), avcodec_copy_context(), avcodec_decode_subtitle2(), avcodec_default_get_format(), avcodec_encode_audio2(), avcodec_encode_subtitle(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_get_hw_frames_parameters(), avcodec_open2(), avcodec_receive_frame(), avcodec_receive_packet(), avcodec_send_frame(), avcodec_send_packet(), avcodec_string(), avformat_find_stream_info(), binkaudio_receive_frame(), codec_child_next(), compat_decode(), config_input(), context_to_name(), cuvid_decode_init(), cuvid_test_capabilities(), decode_end(), decode_init(), decode_receive_frame_internal(), decode_simple_internal(), do_video_out(), dpcm_decode_frame(), dpcm_decode_init(), dump_stream_format(), eightsvx_decode_init(), encode_init(), ff_amf_send_frame(), ff_decode_bsfs_init(), ff_decode_frame_props(), ff_decode_get_packet(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_get_format(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mjpeg_encode_picture_header(), ff_mjpeg_init_hvsample(), ff_mpv_decode_init(), ff_mpv_encode_init(), ff_print_debug_info2(), ff_slice_thread_init(), ff_snow_get_buffer(), ff_thread_can_start_frame(), ff_thread_flush(), ff_v4l2_m2m_codec_full_reinit(), ff_vc1_parse_frame_header(), ff_wma_init(), ffmmal_init_decoder(), frame_worker_thread(), get_buffer_internal(), get_category(), get_format(), get_nb_samples(), get_pixel_format(), h263_get_format(), hap_decode(), init(), init_band_stepsize(), init_context_defaults(), init_output_stream(), mpeg_decode_init(), nvdec_mpeg4_start_frame(), nvenc_codec_specific_pic_params(), nvenc_setup_codec_config(), nvenc_setup_device(), nvenc_setup_encoder(), omx_component_init(), omx_encode_init(), open_audio(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), process_frame(), process_output_surface(), reap_filters(), sbc_encode_init(), show_stream(), submit_packet(), test_copy(), test_copy_print_codec(), thread_get_buffer_internal(), try_decode_frame(), try_decode_video_frame(), update_context_from_thread(), v4l2_configure_contexts(), v4l2_get_framesize_compressed(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_init(), vdpau_mpeg4_start_frame(), vp6_decode_init(), vp78_decode_init(), and wma_decode_init().

enum AVCodecID AVCodecContext::codec_id
Examples:
muxing.c, qsvdec.c, and transcoding.c.

Definition at line 1543 of file avcodec.h.

Referenced by add_stream(), adpcm_encode_frame(), alloc_frame_buffer(), amr_decode_fix_avctx(), atrac3_decode_init(), atrac3p_decode_frame(), av_get_audio_frame_duration(), av_parser_parse2(), av_vdpau_get_profile(), avcodec_align_dimensions2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), choose_pix_fmts(), choose_pixel_fmt(), commit_bitstream_and_slice_buffer(), cyuv_decode_frame(), decode_end(), decode_frame(), decode_frame_common(), decode_idat_chunk(), decode_init(), decode_mb(), decode_nal_units(), decode_packet(), decode_video(), determinable_frame_size(), do_subtitle_out(), dump_video_param(), dxva2_vc1_decode_slice(), dxva_check_codec_compatibility(), dxva_get_decoder_configuration(), encode_apng(), encode_frame(), encode_init(), encode_mb(), estimate_best_b_count(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_AMediaCodecProfile_getProfileFromAVCodecContext(), ff_draw_horiz_band(), ff_dxva2_common_frame_params(), ff_er_frame_end(), ff_frame_thread_encoder_init(), ff_h263_decode_frame(), ff_idctdsp_init_x86(), ff_mjpeg_encode_picture_header(), ff_mjpeg_find_marker(), ff_mpeg_unref_picture(), ff_mpv_encode_init(), ff_nvdec_decode_init(), ff_nvdec_frame_params(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_psy_init(), ff_psy_preprocess_init(), ff_qsv_enc_init(), ff_qsv_process_data(), ff_rv34_decode_init(), ff_slice_thread_init(), ff_thread_decode_frame(), ff_vc1_decode_init_alloc_tables(), ff_vc1_parse_frame_header(), ff_vdpau_common_init(), ffat_create_decoder(), ffat_decode(), ffat_get_magic_cookie(), ffat_init_encoder(), ffat_update_ctx(), ffat_usable_extradata(), ffmmal_init_decoder(), fill_slice(), g729_parse(), get_bit_rate(), get_rate(), gsm_decode_frame(), gsm_init(), gsm_parse(), h264_slice_header_init(), handle_rstn(), has_codec_parameters(), imc_decode_block(), imc_decode_init(), init_context_defaults(), init_input_stream(), init_output_stream(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), is_intra_more_likely(), ivi_decode_blocks(), jpeg_table_header(), libgsm_decode_init(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), LLVMFuzzerTestOneInput(), mace_decode_frame(), main(), mediacodec_decode_init(), mlp_encode_init(), mpeg1_decode_sequence(), mpeg_decode_postinit(), mpeg_decode_sequence_extension(), mpeg_get_pixelformat(), mpegaudio_parse(), mpegvideo_extract_headers(), mvc_decode_frame(), mvc_decode_init(), open_output_file(), parse(), pcm_decode_frame(), pcm_decode_init(), png_write_image_data(), qsv_decode(), qsv_decode_close(), qsv_decode_init(), qsv_retrieve_enc_params(), read_access_unit(), read_frame_internal(), read_major_sync(), read_matrix_params(), read_restart_header(), rkmpp_get_codingtype(), rkmpp_init_decoder(), rv34_parse(), set_mv_strides(), set_pix_fmt(), sp5x_decode_frame(), stream_component_open(), tb_unreliable(), try_decode_frame(), try_decode_video_frame(), update_stream_avctx(), v408_decode_frame(), v408_encode_frame(), v4l2_decode_init(), v4l2_encode_init(), v4l2_prepare_encoder(), vaapi_decode_make_config(), vaapi_vc1_decode_slice(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), vp3_decode_init(), vpx_decode(), vpx_free(), vpx_init(), vtenc_configure_encoder(), write_major_sync(), X264_init(), xma_decode_init(), and xvid_encode_init().

unsigned int AVCodecContext::codec_tag

fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').

This is used to work around some encoder bugs. A demuxer should set this to what is stored in the field used to identify the codec. If there are multiple such fields in a container then the demuxer should choose the one which maximizes the information about the used codec. If the codec tag field in a container is larger than 32 bits then the demuxer should remap the longer ID to 32 bits with a table or other structure. Alternatively a new extra_codec_tag + size could be added but for this a clear advantage must be demonstrated first.

  • encoding: Set by user, if not then the default based on codec_id will be used.
  • decoding: Set by user, will be converted to uppercase by libavcodec during init.

Definition at line 1558 of file avcodec.h.

Referenced by a64multi_encode_init(), aasc_decode_frame(), av_get_audio_frame_duration(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), avformat_transfer_internal_stream_timing_info(), bitpacked_init_decoder(), clv_decode_frame(), decode_frame(), decode_frame_common(), decode_init(), dnxhd_encode_init(), dpcm_decode_frame(), dpcm_decode_init(), encode_init(), extract_header(), ff_dv_frame_profile(), ff_h263_decode_init(), ff_h264_decode_seq_parameter_set(), ff_mjpeg_decode_init(), ff_mjpeg_decode_sos(), ff_mpv_decode_init(), ff_update_duplicate_context(), hap_init(), hap_parse_frame_header(), init_duplicate_context(), libspeex_decode_init(), magy_encode_init(), mjpeg_decode_com(), mpeg_decode_frame(), mpeg_decode_init(), new_output_stream(), on2avc_decode_init(), prores_encode_init(), raw_encode(), raw_encode_init(), raw_init_decoder(), rscc_init(), speedhq_decode_init(), tb_unreliable(), utvideo_encode_init(), videotoolbox_retrieve_data(), vp3_decode_init(), xsub_encoder_init(), xvid_encode_init(), zero12v_decode_frame(), and zero12v_decode_init().

void* AVCodecContext::priv_data
Examples:
encode_video.c.

Definition at line 1560 of file avcodec.h.

Referenced by a64multi_close_encoder(), a64multi_encode_frame(), a64multi_encode_init(), aac_decode_close(), aac_decode_er_frame(), aac_decode_frame(), aac_decode_frame_int(), aac_decode_init(), aac_encode_close(), aac_encode_end(), aac_encode_frame(), aac_encode_init(), aasc_decode_end(), aasc_decode_frame(), aasc_decode_init(), ac3_decode_end(), ac3_decode_frame(), ac3_decode_init(), ac3_fixed_encode_init(), add_color_attr(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_close(), adpcm_encode_frame(), adpcm_encode_init(), adpcm_flush(), adpcm_swf_decode(), adx_decode_flush(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), aic_decode_close(), aic_decode_frame(), aic_decode_init(), al_decode_frame(), alac_decode_close(), alac_decode_frame(), alac_decode_init(), alac_encode_close(), alac_encode_frame(), alac_encode_init(), alloc_buffers(), allocate_buffers(), allocate_tables(), amf_copy_buffer(), amf_encode_init_h264(), amf_encode_init_hevc(), amf_init_context(), amf_init_encoder(), amf_load_library(), amr_wb_encode_close(), amr_wb_encode_frame(), amr_wb_encode_init(), amrnb_decode_frame(), amrnb_decode_init(), amrwb_decode_frame(), amrwb_decode_init(), aom_decode(), aom_encode(), aom_free(), aom_init(), ape_decode_close(), ape_decode_frame(), ape_decode_init(), ape_flush(), apng_encode_frame(), append_to_cached_buf(), apply_window_and_mdct(), aptx_close(), aptx_decode_frame(), aptx_encode_frame(), aptx_init(), ass_encode_frame(), atrac1_decode_end(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_close(), atrac3_decode_frame(), atrac3_decode_init(), atrac3p_decode_close(), atrac3p_decode_frame(), atrac3p_decode_init(), atrac9_decode_close(), atrac9_decode_flush(), atrac9_decode_frame(), atrac9_decode_init(), avcodec_close(), avcodec_copy_context(), avcodec_open2(), avpriv_h264_has_num_reorder_frames(), avs_decode_end(), avs_decode_frame(), avs_decode_init(), bethsoftvid_decode_end(), bethsoftvid_decode_frame(), bethsoftvid_decode_init(), bfi_decode_close(), bfi_decode_frame(), bfi_decode_init(), binkaudio_receive_frame(), bitpacked_decode(), bitpacked_init_decoder(), build_color_map(), build_huffman(), cavs_decode_frame(), cavs_flush(), cdg_decode_end(), cdg_decode_frame(), cdg_decode_init(), cdxl_decode_end(), cdxl_decode_frame(), cdxl_decode_init(), cfhd_close(), cfhd_decode(), cfhd_init(), check_cu(), choose_tiling(), cinaudio_decode_frame(), cinaudio_decode_init(), cinepak_decode_end(), cinepak_decode_frame(), cinepak_decode_init(), cinepak_encode_end(), cinepak_encode_frame(), cinepak_encode_init(), cinvideo_decode_end(), cinvideo_decode_frame(), cinvideo_decode_init(), clear_plane(), cllc_decode_close(), cllc_decode_frame(), cllc_decode_init(), close_decoder(), clv_decode_end(), clv_decode_frame(), clv_decode_init(), cmap_read_palette(), cmv_decode_end(), cmv_decode_frame(), cmv_decode_init(), cng_decode_close(), cng_decode_flush(), cng_decode_frame(), cng_decode_init(), cng_encode_close(), cng_encode_frame(), cng_encode_init(), codec_child_next(), codec_reinit(), codecctl_int(), combine_residual_frame(), commit_bitstream_and_slice_buffer(), compress_texture(), cook_decode_close(), cook_decode_frame(), cook_decode_init(), copy_frame(), copy_param_sets(), copy_plane(), copy_processed_frame(), count_colors(), cpia_decode_end(), cpia_decode_frame(), cpia_decode_init(), create_cv_pixel_buffer(), crystalhd_decode_packet(), crystalhd_receive_frame(), cuvid_decode_end(), cuvid_decode_frame(), cuvid_decode_init(), cuvid_decode_packet(), cuvid_flush(), cuvid_handle_picture_decode(), cuvid_handle_picture_display(), cuvid_handle_video_sequence(), cuvid_is_buffer_full(), cuvid_output_frame(), cuvid_test_capabilities(), cyuv_decode_frame(), cyuv_decode_init(), davs2_decode_frame(), davs2_dump_frames(), davs2_end(), davs2_init(), dcadec_close(), dcadec_decode_frame(), dcadec_flush(), dcadec_init(), dds_decode(), decode(), decode_ac_coeffs(), decode_aiff_header(), decode_argb(), decode_argbi(), decode_argx(), decode_argxi(), decode_aybr(), decode_aybri(), decode_block(), decode_blocks(), decode_byry(), decode_byryi(), decode_c82i(), decode_c82p(), decode_ca2i(), decode_ca2p(), decode_ca4i(), decode_ca4p(), decode_chunks(), decode_close(), decode_dlta(), decode_element(), decode_end(), decode_fint(), decode_flush(), decode_frame(), decode_frame_header(), decode_hq_slice_row(), decode_init(), decode_inter(), decode_interframe_v4(), decode_interframe_v4a(), decode_intra(), decode_kfrm(), decode_lowdelay_slice(), decode_mb_row_no_filter(), decode_mous(), decode_move(), decode_mpos(), decode_packet(), decode_picture(), decode_picture_header(), decode_plane(), decode_rgb(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_slice(), decode_slice_chroma(), decode_slice_luma(), decode_slice_thread(), decode_subband_arith(), decode_subband_golomb(), decode_tag(), decode_tiles(), decode_wmv9(), decode_ybr(), decode_ybr10(), decode_ybr10i(), decode_ybri(), decode_ybyr(), decode_yry10(), decode_yry10i(), decode_zlib(), decoder_init(), decompress_2(), decompress_5(), decompress_68(), decompress_chunks_thread(), decompress_i(), decompress_p(), decompress_texture_thread(), decompress_texture_thread_internal(), determine_bitrate(), dfa_decode_end(), dfa_decode_frame(), dfa_decode_init(), dirac_decode_data_unit(), dirac_decode_end(), dirac_decode_flush(), dirac_decode_frame(), dirac_decode_init(), display_end_segment(), dnxhd_calc_bits_thread(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_decode_init_thread_copy(), dnxhd_decode_row(), dnxhd_encode_end(), dnxhd_encode_init(), dnxhd_encode_picture(), dnxhd_encode_thread(), dnxhd_mb_var_thread(), dnxhd_write_header(), dolby_e_close(), dolby_e_decode_frame(), dolby_e_flush(), dolby_e_init(), dpcm_decode_frame(), dpcm_decode_init(), draw_char(), draw_cursor(), dss_sp_decode_frame(), dss_sp_decode_init(), dv_decode_video_segment(), dv_encode_video_segment(), dvbsub_close_decoder(), dvbsub_decode(), dvbsub_display_end_segment(), dvbsub_encode(), dvbsub_init_decoder(), dvbsub_parse_clut_segment(), dvbsub_parse_display_definition_segment(), dvbsub_parse_object_segment(), dvbsub_parse_page_segment(), dvbsub_parse_pixel_data_block(), dvbsub_parse_region_segment(), dvdsub_decode(), dvdsub_flush(), dvdsub_init(), dvdsub_parse_extradata(), dvvideo_decode_frame(), dvvideo_decode_init(), dvvideo_encode_frame(), dvvideo_encode_init(), dxv_close(), dxv_decode(), dxv_decompress_dxt1(), dxv_decompress_dxt5(), dxv_decompress_lzf(), dxv_decompress_raw(), dxv_decompress_ycg6(), dxv_decompress_yg10(), dxv_init(), dxva2_h264_decode_slice(), dxva2_h264_end_frame(), dxva2_h264_start_frame(), dxva2_hevc_decode_slice(), dxva2_hevc_end_frame(), dxva2_hevc_start_frame(), dxva2_mpeg2_decode_slice(), dxva2_mpeg2_end_frame(), dxva2_mpeg2_start_frame(), dxva2_vc1_decode_slice(), dxva2_vc1_end_frame(), dxva2_vc1_start_frame(), dxva2_vp9_decode_slice(), dxva2_vp9_end_frame(), dxva2_vp9_start_frame(), eightsvx_decode_close(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_apng(), encode_callback(), encode_close(), encode_dvd_subtitles(), encode_end(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_nals(), encode_picture_ls(), encode_plane(), encode_png(), encode_rgb48_10bit(), encode_slice(), encode_slice_data(), encode_superframe(), end(), erase_line(), erase_screen(), escape124_decode_close(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_close(), escape130_decode_frame(), escape130_decode_init(), evrc_decode_frame(), evrc_decode_init(), execute_code(), extract_header(), fdk_aac_decode_close(), fdk_aac_decode_flush(), fdk_aac_decode_frame(), fdk_aac_decode_init(), ff_ac3_encode_close(), ff_ac3_encode_init(), ff_ac3_float_encode_init(), ff_amf_encode_close(), ff_amf_receive_packet(), ff_amf_send_frame(), ff_ass_decoder_flush(), ff_asv_common_init(), ff_cavs_end(), ff_cavs_init(), ff_dca_check_crc(), ff_dca_core_filter_frame(), ff_dca_core_parse_exss(), ff_dca_xll_filter_frame(), ff_dvvideo_init(), ff_ffv1_close(), ff_ffv1_common_init(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h263_resync(), ff_h264_update_thread_context(), ff_huffyuv_common_init(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_libwebp_encode_init_common(), ff_mjpeg_decode_end(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_init(), ff_mjpeg_encode_picture_header(), ff_mpeg4_frame_end(), ff_mpeg4_workaround_bugs(), ff_mpeg_flush(), ff_mpeg_update_thread_context(), ff_mpv_encode_end(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_msmpeg4_decode_init(), ff_nvenc_encode_close(), ff_nvenc_encode_frame(), ff_nvenc_encode_init(), ff_nvenc_receive_packet(), ff_nvenc_send_frame(), ff_rv34_decode_end(), ff_rv34_decode_frame(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_rv34_decode_update_thread_context(), ff_snow_common_init_after_header(), ff_snow_release_buffer(), ff_twinvq_decode_close(), ff_twinvq_decode_frame(), ff_twinvq_decode_init(), ff_v4l2_m2m_codec_end(), ff_v4l2_m2m_codec_init(), ff_v4l2_m2m_create_context(), ff_vaapi_encode2(), ff_vaapi_encode_close(), ff_vaapi_encode_init(), ff_vc1_decode_end(), ff_videotoolbox_avcc_extradata_create(), ff_videotoolbox_h264_decode_slice(), ff_videotoolbox_h264_start_frame(), ff_videotoolbox_hvcc_extradata_create(), ff_vp56_decode_frame(), ff_vp56_decode_mbs(), ff_vp56_free(), ff_vp56_init(), ff_vp8_decode_free(), ff_vp9_loopfilter_sb(), ff_wma_end(), ff_wma_init(), ff_xvmc_field_end(), ff_xvmc_field_start(), ffat_close_decoder(), ffat_close_encoder(), ffat_copy_samples(), ffat_create_decoder(), ffat_decode(), ffat_decode_callback(), ffat_decode_flush(), ffat_encode(), ffat_encode_callback(), ffat_encode_flush(), ffat_get_magic_cookie(), ffat_init_decoder(), ffat_init_encoder(), ffat_set_extradata(), ffat_update_ctx(), ffat_usable_extradata(), ffmal_copy_frame(), ffmal_update_format(), ffmmal_add_packet(), ffmmal_close_decoder(), ffmmal_decode(), ffmmal_fill_input_port(), ffmmal_fill_output_port(), ffmmal_flush(), ffmmal_init_decoder(), ffmmal_read_frame(), ffmmal_stop_decoder(), fic_decode_close(), fic_decode_frame(), fic_decode_init(), fic_decode_slice(), fic_draw_cursor(), fill_slice(), fill_slice_long(), filter_frame_fixed(), filter_mb_row(), find_quant_thread(), find_slice_quant(), finish_frame(), fits_decode_frame(), flac_decode_close(), flac_decode_frame(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flashsv2_encode_end(), flashsv2_encode_frame(), flashsv2_encode_init(), flashsv_decode_block(), flashsv_decode_end(), flashsv_decode_frame(), flashsv_decode_init(), flashsv_encode_end(), flashsv_encode_frame(), flashsv_encode_init(), flic_decode_end(), flic_decode_frame_15_16BPP(), flic_decode_frame_24BPP(), flic_decode_frame_8BPP(), flic_decode_init(), flush(), flush_cache(), flush_decoder(), flush_dpb(), force_lossy_output(), frame_configure_elements(), free_buffers(), free_tables(), g2m_decode_end(), g2m_decode_frame(), g2m_decode_init(), g722_decode_frame(), g722_decode_init(), g722_encode_close(), g722_encode_frame(), g722_encode_init(), g723_1_decode_frame(), g723_1_decode_init(), g723_1_encode_frame(), g723_1_encode_init(), gdv_decode_close(), gdv_decode_frame(), gdv_decode_init(), get_buffer(), get_cv_pixel_info(), get_length_code_size(), get_nb_samples(), get_params_size(), get_stats(), get_stream_info(), get_vt_h264_profile_level(), get_vt_hevc_profile_level(), gif_decode_close(), gif_decode_frame(), gif_decode_init(), gif_encode_close(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), gsm_decode_block(), gsm_flush(), h261_decode_end(), h261_decode_frame(), h261_decode_init(), h263_get_format(), h264_decode_end(), h264_decode_frame(), h264_decode_init(), hap_close(), hap_compress_frame(), hap_decode(), hap_encode(), hap_init(), hap_parse_frame_header(), hevc_decode_flush(), hevc_decode_frame(), hevc_decode_free(), hevc_decode_init(), hevc_init_context(), hls_decode_entry(), hls_decode_entry_wpp(), hnm_decode_end(), hnm_decode_frame(), hnm_decode_init(), hnm_update_palette(), hq_hqa_decode_close(), hq_hqa_decode_frame(), hq_hqa_decode_init(), hqx_decode_close(), hqx_decode_frame(), hqx_decode_init(), hscroll(), idcin_decode_frame(), idcin_decode_init(), ilbc_decode_frame(), ilbc_decode_init(), ilbc_encode_frame(), ilbc_encode_init(), imc_decode_close(), imc_decode_frame(), imc_decode_init(), init(), init_context_defaults(), init_decoder(), init_frames(), init_idct(), init_ref(), init_thread_copy(), input_callback(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_end(), ir2_decode_frame(), ir2_decode_init(), j2kenc_destroy(), j2kenc_init(), jacosub_decode_frame(), jpeg2000_decode_frame(), jpeg2000_decode_init(), jpeg2000_decode_tile(), jpeg_table_header(), lag_decode_frame(), lag_decode_init(), latm_decode_frame(), latm_decode_init(), libcelt_dec_close(), libcelt_dec_decode(), libcelt_dec_init(), libcodec2_close(), libcodec2_decode(), libcodec2_encode(), libcodec2_init_common(), libcodec2_init_encoder(), libgsm_decode_close(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_close(), libgsm_encode_frame(), libgsm_encode_init(), libgsm_flush(), libkvazaar_close(), libkvazaar_encode(), libkvazaar_init(), libopenjpeg_decode_frame(), libopenjpeg_decode_init(), libopenjpeg_encode_frame(), libopenjpeg_encode_init(), libopus_decode(), libopus_decode_close(), libopus_decode_init(), libopus_encode(), libopus_encode_close(), libopus_encode_init(), libopus_flush(), librsvg_decode_frame(), libshine_encode_close(), libshine_encode_frame(), libshine_encode_init(), libspeex_decode_close(), libspeex_decode_flush(), libspeex_decode_frame(), libspeex_decode_init(), libvorbis_encode_close(), libvorbis_encode_frame(), libvorbis_encode_init(), libvorbis_setup(), libwebp_anim_encode_close(), libwebp_anim_encode_frame(), libwebp_anim_encode_init(), libwebp_encode_close(), libwebp_encode_frame(), libx265_encode_close(), libx265_encode_frame(), libx265_encode_init(), ljpeg_encode_bgr(), ljpeg_encode_close(), ljpeg_encode_frame(), ljpeg_encode_init(), ljpeg_encode_yuv(), log_encoder_error(), mace_decode_frame(), magy_decode_end(), magy_decode_frame(), magy_decode_init(), magy_decode_slice(), magy_decode_slice10(), magy_encode_close(), magy_encode_frame(), magy_encode_init(), main(), mediacodec_decode_close(), mediacodec_decode_flush(), mediacodec_decode_init(), mediacodec_receive_frame(), metasound_decode_init(), microdvd_decode_frame(), mimic_decode_end(), mimic_decode_frame(), mimic_decode_init(), mjpegb_decode_frame(), mlp_decode_init(), mlp_encode_close(), mlp_encode_frame(), mlp_encode_init(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), mov_text_decode_close(), mov_text_decode_frame(), mov_text_encode_close(), mov_text_encode_frame(), mov_text_encode_init(), mov_text_flush(), mov_text_init(), mp3lame_encode_close(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_end(), mp_decode_frame(), mp_decode_init(), MPA_encode_frame(), MPA_encode_init(), mpc7_decode_close(), mpc7_decode_flush(), mpc7_decode_frame(), mpc7_decode_init(), mpc8_decode_flush(), mpc8_decode_frame(), mpc8_decode_init(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg4_decode_mb(), mpeg4_decode_partitioned_mb(), mpeg4_decode_studio_block(), mpeg_decode_a53_cc(), mpeg_decode_end(), mpeg_decode_frame(), mpeg_decode_gop(), mpeg_decode_init(), mpeg_decode_postinit(), mpeg_decode_user_data(), mpeg_get_pixelformat(), mpl2_decode_frame(), msrle_decode_end(), msrle_decode_frame(), msrle_decode_init(), mss1_decode_end(), mss1_decode_frame(), mss1_decode_init(), mss2_decode_end(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_end(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_end(), mss4_decode_frame(), mss4_decode_init(), msvideo1_decode_end(), msvideo1_decode_frame(), msvideo1_decode_init(), mvc_decode_frame(), mvc_decode_init(), mxpeg_decode_end(), mxpeg_decode_frame(), mxpeg_decode_init(), nvdec_h264_decode_slice(), nvdec_h264_frame_params(), nvdec_h264_start_frame(), nvdec_hevc_frame_params(), nvdec_hevc_start_frame(), nvdec_mjpeg_start_frame(), nvdec_mpeg12_start_frame(), nvdec_mpeg4_start_frame(), nvdec_vc1_start_frame(), nvdec_vp8_start_frame(), nvdec_vp9_start_frame(), nvenc_alloc_surface(), nvenc_check_cap(), nvenc_check_capabilities(), nvenc_check_codec_support(), nvenc_check_device(), nvenc_codec_specific_pic_params(), nvenc_find_free_reg_resource(), nvenc_load_libraries(), nvenc_open_session(), nvenc_override_rate_control(), nvenc_pop_context(), nvenc_push_context(), nvenc_recalc_surfaces(), nvenc_register_frame(), nvenc_set_timestamp(), nvenc_setup_device(), nvenc_setup_encoder(), nvenc_setup_extradata(), nvenc_setup_h264_config(), nvenc_setup_hevc_config(), nvenc_setup_rate_control(), nvenc_setup_surfaces(), nvenc_upload_frame(), oggvorbis_decode_close(), oggvorbis_decode_frame(), oggvorbis_decode_init(), omx_component_init(), omx_encode_end(), omx_encode_frame(), omx_encode_init(), on2avc_decode_close(), on2avc_decode_frame(), on2avc_decode_init(), opus_decode_close(), opus_decode_flush(), opus_decode_init(), opus_decode_packet(), opus_encode_end(), opus_encode_frame(), opus_encode_init(), output_callback(), output_ready(), paf_video_close(), paf_video_decode(), paf_video_init(), parse_decoder_init(), parse_object_segment(), parse_optional_info(), parse_palette_segment(), parse_pixel_format(), parse_presentation_segment(), parse_sub_headers(), pcm_decode_close(), pcm_decode_frame(), pcm_decode_init(), pcm_dvd_decode_frame(), pcm_dvd_decode_init(), pcm_dvd_decode_samples(), pcm_dvd_decode_uninit(), pcm_dvd_parse_header(), pixlet_close(), pixlet_decode_frame(), png_dec_end(), png_dec_init(), png_enc_close(), png_enc_init(), png_write_image_data(), png_write_row(), pnm_decode_frame(), postprocess_current_frame(), process_output_surface(), prores_encode_close(), prores_encode_init(), put_audio_specific_config(), put_pce(), qcelp_decode_frame(), qcelp_decode_init(), qdm2_decode_close(), qdm2_decode_frame(), qdm2_decode_init(), qdmc_decode_close(), qdmc_decode_frame(), qdmc_decode_init(), qdmc_flush(), qsv_decode_close(), qsv_decode_flush(), qsv_decode_frame(), qsv_decode_init(), qsv_enc_close(), qsv_enc_frame(), qsv_enc_init(), qsv_h264_set_encode_ctrl(), qtrle_decode_end(), qtrle_decode_frame(), qtrle_decode_init(), qtrle_encode_end(), qtrle_encode_frame(), qtrle_encode_init(), queue_frames(), ra144_decode_frame(), ra144_decode_init(), ra144_encode_close(), ra144_encode_frame(), ra144_encode_init(), ra288_decode_close(), ra288_decode_frame(), ra288_decode_init(), raw_close_decoder(), raw_init_decoder(), read_access_unit(), read_block_types(), read_colorspace_details(), read_high_coeffs(), read_highpass(), read_huffman_tree(), read_low_coeffs(), realtext_decode_frame(), receive_frame(), reconfig_encoder(), reconstruction(), render_charset(), rkmpp_close_decoder(), rkmpp_flush(), rkmpp_init_decoder(), rkmpp_receive_frame(), rkmpp_retrieve_frame(), rkmpp_send_packet(), rkmpp_write_data(), rl2_decode_end(), rl2_decode_frame(), rl2_decode_init(), rle_uncompress(), roq_decode_end(), roq_decode_frame(), roq_decode_init(), roq_dpcm_encode_close(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), roq_encode_end(), roq_encode_frame(), roq_encode_init(), rpza_decode_end(), rpza_decode_frame(), rpza_decode_init(), rscc_close(), rscc_decode_frame(), rscc_init(), run_postproc(), rv10_decode_end(), rv10_decode_frame(), rv10_decode_init(), rv10_decode_packet(), rv30_decode_init(), rv40_decode_init(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), sami_close(), sami_decode_frame(), sami_flush(), sami_init(), sami_paragraph_to_ass(), save_subtitle_set(), sbc_decode_frame(), sbc_decode_init(), sbc_encode_frame(), sbc_encode_init(), screenpresso_close(), screenpresso_decode_frame(), screenpresso_init(), select_palette(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), set_constqp(), set_lossless(), set_pix_fmt(), set_sample_rate_params(), set_vbr(), setup_hwaccel_for_pixfmt(), sgi_decode_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), show_stream(), sipr_decode_frame(), sipr_decoder_init(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), smvjpeg_decode_end(), smvjpeg_decode_frame(), smvjpeg_decode_init(), speedhq_decode_frame(), speedhq_decode_init(), srt_decode_frame(), srt_encode_close(), srt_encode_init(), storeframe(), submit_stats(), subviewer_decode_frame(), sunrast_encode_frame(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svc_decode_close(), svc_decode_frame(), svc_decode_init(), svc_encode_close(), svc_encode_frame(), svc_encode_init(), svq1_decode_end(), svq1_decode_frame(), svq1_decode_frame_header(), svq1_decode_init(), svq1_encode_end(), svq1_encode_frame(), svq1_encode_init(), svq1_flush(), svq3_decode_end(), svq3_decode_frame(), svq3_decode_init(), svq3_decode_slice_header(), synth_frame(), synth_superframe(), tak_decode_close(), tak_decode_frame(), tak_decode_init(), targa_encode_frame(), tdsc_close(), tdsc_decode_frame(), tdsc_decode_jpeg_tile(), tdsc_decode_tiles(), tdsc_init(), tdsc_load_cursor(), tdsc_paint_cursor(), tdsc_parse_dtsm(), tdsc_parse_tdsf(), teletext_close_decoder(), teletext_decode_frame(), teletext_init_decoder(), test_copy(), test_copy_print_codec(), text_decode_frame(), text_flush(), text_to_ass(), tgq_decode_frame(), tgq_decode_init(), tgv_decode_end(), tgv_decode_frame(), tgv_decode_init(), tiff_end(), tiff_init(), timestamp_queue_enqueue(), tqi_decode_end(), tqi_decode_frame(), tqi_decode_init(), tqi_idct_put(), truemotion1_decode_end(), truemotion1_decode_frame(), truemotion1_decode_init(), truemotion2rt_decode_frame(), truemotion2rt_decode_header(), truespeech_decode_frame(), truespeech_decode_init(), tscc2_decode_end(), tscc2_decode_frame(), tscc2_decode_init(), tta_decode_close(), tta_decode_frame(), tta_decode_init(), tta_encode_close(), tta_encode_frame(), tta_encode_init(), twinvq_decode_init(), twolame_encode_close(), twolame_encode_frame(), twolame_encode_init(), ulti_decode_end(), ulti_decode_frame(), ulti_decode_init(), uninit(), unpack_intraframe(), unsupported(), update_block_buffers(), update_canvas_size(), update_frames(), update_size(), utvideo_encode_close(), utvideo_encode_frame(), utvideo_encode_init(), v4l2_receive_frame(), v4l2_receive_packet(), v4l2_send_frame(), v4l2_try_start(), vaapi_encode_add_global_param(), vaapi_encode_alloc_output_buffer(), vaapi_encode_clear_old(), vaapi_encode_create_recon_frames(), vaapi_encode_free_output_buffer(), vaapi_encode_get_next(), vaapi_encode_h264_add_nal(), vaapi_encode_h264_close(), vaapi_encode_h264_configure(), vaapi_encode_h264_init(), vaapi_encode_h264_init_picture_params(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h264_init_slice_params(), vaapi_encode_h264_write_access_unit(), vaapi_encode_h264_write_extra_header(), vaapi_encode_h264_write_sequence_header(), vaapi_encode_h264_write_slice_header(), vaapi_encode_h265_add_nal(), vaapi_encode_h265_close(), vaapi_encode_h265_configure(), vaapi_encode_h265_init(), vaapi_encode_h265_init_picture_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_h265_init_slice_params(), vaapi_encode_h265_write_access_unit(), vaapi_encode_h265_write_extra_header(), vaapi_encode_h265_write_sequence_header(), vaapi_encode_h265_write_slice_header(), vaapi_encode_init_gop_structure(), vaapi_encode_init_packed_headers(), vaapi_encode_init_quality(), vaapi_encode_init_rate_control(), vaapi_encode_init_slice_structure(), vaapi_encode_issue(), vaapi_encode_make_packed_header(), vaapi_encode_make_param_buffer(), vaapi_encode_mjpeg_close(), vaapi_encode_mjpeg_configure(), vaapi_encode_mjpeg_init(), vaapi_encode_mjpeg_init_picture_params(), vaapi_encode_mjpeg_init_slice_params(), vaapi_encode_mjpeg_write_extra_buffer(), vaapi_encode_mjpeg_write_image_header(), vaapi_encode_mpeg2_add_header(), vaapi_encode_mpeg2_close(), vaapi_encode_mpeg2_configure(), vaapi_encode_mpeg2_init(), vaapi_encode_mpeg2_init_picture_params(), vaapi_encode_mpeg2_init_sequence_params(), vaapi_encode_mpeg2_init_slice_params(), vaapi_encode_mpeg2_write_fragment(), vaapi_encode_mpeg2_write_picture_header(), vaapi_encode_mpeg2_write_sequence_header(), vaapi_encode_output(), vaapi_encode_profile_entrypoint(), vaapi_encode_step(), vaapi_encode_truncate_gop(), vaapi_encode_vp8_configure(), vaapi_encode_vp8_init(), vaapi_encode_vp8_init_picture_params(), vaapi_encode_vp8_init_sequence_params(), vaapi_encode_vp8_write_quant_table(), vaapi_encode_vp9_configure(), vaapi_encode_vp9_init(), vaapi_encode_vp9_init_picture_params(), vaapi_encode_vp9_init_sequence_params(), vaapi_encode_wait(), vaapi_h264_decode_slice(), vaapi_h264_end_frame(), vaapi_h264_start_frame(), vaapi_hevc_decode_slice(), vaapi_hevc_end_frame(), vaapi_hevc_start_frame(), vaapi_mjpeg_decode_slice(), vaapi_mjpeg_end_frame(), vaapi_mjpeg_start_frame(), vaapi_mpeg2_decode_slice(), vaapi_mpeg2_end_frame(), vaapi_mpeg2_start_frame(), vaapi_mpeg4_decode_slice(), vaapi_mpeg4_end_frame(), vaapi_mpeg4_start_frame(), vaapi_vc1_decode_slice(), vaapi_vc1_end_frame(), vaapi_vc1_start_frame(), vaapi_vp8_decode_slice(), vaapi_vp8_end_frame(), vaapi_vp8_start_frame(), vaapi_vp9_decode_slice(), vaapi_vp9_end_frame(), vaapi_vp9_start_frame(), vble_decode_close(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc2_encode_end(), vc2_encode_frame(), vc2_encode_init(), vcr1_decode_frame(), vcr2_init_sequence(), vdpau_h264_decode_slice(), vdpau_h264_end_frame(), vdpau_h264_set_reference_frames(), vdpau_h264_start_frame(), vdpau_hevc_decode_slice(), vdpau_hevc_end_frame(), vdpau_hevc_start_frame(), vdpau_mpeg4_start_frame(), vdpau_mpeg_decode_slice(), vdpau_mpeg_start_frame(), vdpau_vc1_decode_slice(), vdpau_vc1_start_frame(), videotoolbox_h264_decode_params(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vmdvideo_decode_end(), vmdvideo_decode_frame(), vmdvideo_decode_init(), vorbis_decode_close(), vorbis_decode_flush(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_frame(), vorbis_encode_init(), vp3_decode_end(), vp3_decode_flush(), vp3_decode_frame(), vp3_decode_init(), vp5_decode_init(), vp6_decode_free(), vp6_decode_init(), vp78_decode_frame(), vp78_decode_init(), vp78_decode_mb_row_sliced(), vp78_decode_mv_mb_modes(), vp8_decode_flush_impl(), vp8_lossless_decode_frame(), vp8_lossy_decode_alpha(), vp8_lossy_decode_frame(), vp9_decode_flush(), vp9_decode_frame(), vp9_decode_free(), vp9_decode_init(), vp9_frame_alloc(), vpx_decode(), vpx_encode(), vpx_free(), vpx_init(), vqa_decode_end(), vqa_decode_frame(), vqa_decode_init(), vtenc_close(), vtenc_cm_to_avpacket(), vtenc_configure_encoder(), vtenc_create_encoder(), vtenc_frame(), vtenc_init(), vtenc_output_callback(), vtenc_populate_extradata(), wavesynth_close(), wavesynth_decode(), wavesynth_init(), wavesynth_parse_extradata(), wavpack_decode_block(), wavpack_decode_end(), wavpack_decode_flush(), wavpack_decode_frame(), wavpack_decode_init(), wavpack_encode_close(), wavpack_encode_frame(), wavpack_encode_init(), webp_decode_close(), webp_decode_frame(), webvtt_decode_frame(), webvtt_encode_close(), webvtt_encode_frame(), webvtt_encode_init(), wma_decode_init(), wma_decode_superframe(), wmapro_decode_end(), wmapro_decode_init(), wmapro_decode_packet(), wmapro_flush(), wmavoice_decode_end(), wmavoice_decode_init(), wmavoice_decode_packet(), wmavoice_flush(), wmv2_decode_end(), wmv2_decode_init(), wmv2_encode_init(), wmv9_init(), X264_close(), X264_frame(), X264_init(), xan_decode_chroma(), xan_decode_end(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xavs2_close(), xavs2_encode_frame(), xavs2_init(), XAVS_close(), XAVS_frame(), XAVS_init(), xface_decode_frame(), xface_encode_frame(), xma_decode_end(), xma_decode_init(), xma_decode_packet(), xma_flush(), xpm_decode_close(), xpm_decode_frame(), xvid_encode_close(), xvid_encode_frame(), xvid_encode_init(), yop_decode_close(), yop_decode_frame(), yop_decode_init(), zerocodec_decode_close(), zerocodec_decode_frame(), and zerocodec_decode_init().

struct AVCodecInternal* AVCodecContext::internal

Private context used for internal data.

Unlike priv_data, this is not codec-specific. It is used in general libavcodec functions.

Definition at line 1568 of file avcodec.h.

Referenced by aac_decode_frame_int(), audio_get_buffer(), avcodec_close(), avcodec_copy_context(), avcodec_decode_subtitle2(), avcodec_encode_audio2(), avcodec_encode_video2(), avcodec_flush_buffers(), avcodec_is_open(), avcodec_open2(), avcodec_receive_frame(), avcodec_receive_packet(), avcodec_send_frame(), avcodec_send_packet(), bsfs_flush(), bsfs_poll(), cfhd_close(), cng_decode_frame(), compat_decode(), decode_end(), decode_fill(), decode_init(), decode_receive_frame_internal(), decode_simple_internal(), do_encode(), encode_thread(), ff_alloc_entries(), ff_alloc_packet2(), ff_decode_bsfs_init(), ff_decode_bsfs_uninit(), ff_decode_frame_props(), ff_decode_get_packet(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_mpv_encode_picture(), ff_mpv_reallocate_putbitbuffer(), ff_nvdec_decode_init(), ff_nvdec_decode_uninit(), ff_nvdec_end_frame(), ff_nvdec_simple_decode_slice(), ff_nvdec_simple_end_frame(), ff_nvdec_start_frame(), ff_nvenc_send_frame(), ff_reset_entries(), ff_rv34_decode_init(), ff_rv34_decode_init_thread_copy(), ff_slice_thread_execute_with_mainfunc(), ff_slice_thread_free(), ff_slice_thread_init(), ff_thread_await_progress(), ff_thread_await_progress2(), ff_thread_can_start_frame(), ff_thread_decode_frame(), ff_thread_finish_setup(), ff_thread_flush(), ff_thread_get_format(), ff_thread_release_buffer(), ff_thread_report_progress(), ff_thread_report_progress2(), ff_thread_video_encode_frame(), ff_vaapi_decode_destroy_buffers(), ff_vaapi_decode_init(), ff_vaapi_decode_issue(), ff_vaapi_decode_make_param_buffer(), ff_vaapi_decode_make_slice_buffer(), ff_vaapi_decode_uninit(), ff_vdpau_common_end_frame(), ff_vdpau_common_init(), ff_vdpau_common_reinit(), ff_vdpau_common_uninit(), ff_videotoolbox_avcc_extradata_create(), ff_videotoolbox_h264_start_frame(), ff_videotoolbox_uninit(), frame_worker_thread(), h264_decode_init(), hevc_decode_init(), hqx_decode_close(), hwaccel_init(), hwaccel_uninit(), libopus_decode_init(), libopus_flush(), main_function(), mimic_decode_end(), mimic_decode_init(), nvdec_h264_decode_slice(), nvdec_h264_start_frame(), nvdec_hevc_decode_slice(), nvdec_hevc_start_frame(), nvdec_mjpeg_start_frame(), nvdec_mpeg12_start_frame(), nvdec_mpeg4_start_frame(), nvdec_vc1_start_frame(), nvdec_vp8_start_frame(), nvdec_vp9_start_frame(), png_dec_init(), thread_execute(), thread_execute2(), thread_get_buffer_internal(), update_context_from_thread(), update_frame_pool(), vaapi_decode_find_best_format(), video_get_buffer(), videotoolbox_common_decode_slice(), videotoolbox_h264_decode_params(), vp3_decode_end(), vp3_decode_init(), vp78_decode_init(), vp9_decode_init(), worker(), and worker_func().

void* AVCodecContext::opaque

Private data of the user, can be used to carry app specific stuff.

  • encoding: Set by user.
  • decoding: Set by user.
Examples:
qsvdec.c.

Definition at line 1575 of file avcodec.h.

Referenced by cuvid_init(), cuvid_uninit(), get_buffer(), get_format(), hwaccel_decode_init(), hwaccel_retrieve_data(), init_input_stream(), main(), qsv_get_buffer(), qsv_init(), qsv_uninit(), update_context_from_user(), videotoolbox_init(), videotoolbox_retrieve_data(), and videotoolbox_uninit().

int64_t AVCodecContext::bit_rate

the average bitrate

  • encoding: Set by user; unused for constant quantizer encoding.
  • decoding: Set by user, may be overwritten by libavcodec if this info is available in the stream
Examples:
encode_audio.c, encode_video.c, muxing.c, and transcode_aac.c.

Definition at line 1583 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), add_stream(), amf_encode_init_h264(), amf_encode_init_hevc(), amr_wb_encode_frame(), amr_wb_encode_init(), aom_init(), av_get_audio_frame_duration(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), celt_gauge_psy_weight(), decode_frame(), decode_ppc(), dump_cook_context(), encode_init(), estimate_timings_from_bit_rate(), ff_aac_ac3_parse(), ff_adx_decode_header(), ff_dca_core_filter_frame(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_dnxhd_find_cid(), ff_mpv_encode_init(), ff_opus_psy_postencode_update(), ff_wma_init(), ffat_create_decoder(), ffat_init_encoder(), g723_1_encode_init(), g729_parse(), get_bit_rate(), get_ilbc_mode(), get_mode(), ilbc_decode_init(), init_bitstream_params(), init_output_stream(), init_video_param(), lame_window_init(), libgsm_encode_init(), libkvazaar_init(), libopus_configure_encoder(), libopus_encode_init(), libshine_encode_init(), libspeex_decode_frame(), libvorbis_setup(), libx265_encode_init(), LLVMFuzzerTestOneInput(), main(), mark_pns(), metasound_decode_init(), mlp_parse(), mp3lame_encode_init(), MPA_encode_init(), mpegaudio_parse(), mpegvideo_extract_headers(), nvenc_setup_encoder(), nvenc_setup_rate_control(), omx_component_init(), open_output_file(), optimum_dist(), optimum_use15_7(), opus_encode_init(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), pcm_encode_init(), print_enc_params(), psy_3gpp_init(), qdm2_decode_init(), qdmc_decode_init(), qsv_retrieve_enc_params(), ra144_encode_init(), raw_encode_init(), read_frame_internal(), reconfig_encoder(), roq_dpcm_encode_init(), s302m_decode_frame(), s302m_encode_init(), sbc_encode_init(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), select_rc_mode(), sipr_decoder_init(), sipr_split(), svc_encode_init(), twinvq_decode_init(), twolame_encode_init(), v308_encode_init(), v408_encode_init(), v410_encode_init(), v4l2_prepare_encoder(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_rate_control(), validate_options(), vc2_encode_frame(), vorbis_encode_init(), vpx_init(), vtenc_create_encoder(), X264_init(), xavs2_init(), XAVS_init(), xvid_encode_init(), and y41p_encode_init().

int AVCodecContext::bit_rate_tolerance

number of bits the bitstream is allowed to diverge from the reference.

the reference can be CBR (for CBR pass1) or VBR (for pass2)

  • encoding: Set by user; unused for constant quantizer encoding.
  • decoding: unused

Definition at line 1591 of file avcodec.h.

Referenced by ff_mpv_encode_init(), ff_rate_estimate_qscale(), and XAVS_init().

int AVCodecContext::global_quality
int AVCodecContext::compression_level
int AVCodecContext::flags

AV_CODEC_FLAG_*.

  • encoding: Set by user.
  • decoding: Set by user.
Examples:
muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 1613 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), ac3_decode_init(), add_input_streams(), add_stream(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_encode(), aom_init(), apply_8x8(), apply_cropping(), apply_obmc(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), atrac9_decode_init(), av_parser_change(), avcodec_encode_video2(), avcodec_open2(), avcodec_string(), comp_block(), config_input(), config_props(), configure_input_video_filter(), dct_get(), dct_init(), decode_init(), decode_slice_thread(), decode_vop_header(), dnxhd_decode_macroblock(), dnxhd_encode_init(), do_video_out(), do_video_stats(), dsp_init(), dv_guess_dct_mode(), encode_frame(), encode_init(), encode_mb_internal(), encode_picture(), encode_q_branch(), encode_slice_data(), encode_thread(), estimate_best_b_count(), ff_ac3_encode_init(), ff_ac3_float_encode_init(), ff_ass_subtitle_header(), ff_celt_init(), ff_dca_core_filter_frame(), ff_dnxhd_find_cid(), ff_estimate_b_frame_motion(), ff_estimate_p_frame_motion(), ff_ffv1_common_init(), ff_fix_long_p_mvs(), ff_frame_thread_encoder_init(), ff_h263_decode_frame(), ff_h263_encode_mb(), ff_huffyuv_common_init(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv6(), ff_idctdsp_init_ppc(), ff_init_me(), ff_mjpeg_decode_init(), ff_mpeg4_decode_picture_header(), ff_mpeg4_encode_mb(), ff_mpeg4_encode_picture_header(), ff_mpegvideoencdsp_init_x86(), ff_mpv_common_init_x86(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_mspel_motion(), ff_nvenc_encode_init(), ff_nvenc_send_frame(), ff_opus_psy_init(), ff_rate_control_init(), ff_rate_estimate_qscale(), ff_twinvq_decode_init(), ff_vaapi_encode_init(), ff_vc1_b_intfi_loop_filter(), ff_vc1_i_loop_filter(), ff_vc1_i_overlap_filter(), ff_vc1_interp_mc(), ff_vc1_mc_1mv(), ff_vc1_mc_4mv_chroma(), ff_vc1_mc_4mv_chroma4(), ff_vc1_p_intfr_loop_filter(), ff_vc1_p_loop_filter(), ff_vc1_p_overlap_filter(), ff_vp56_init_context(), ff_wmv2_add_mb(), ff_xvmc_decode_mb(), ffat_init_encoder(), finalize_frame(), get_consumed_bytes(), get_cox(), get_flags(), gmc1_motion(), gmc_motion(), h263_get_format(), h264_decode_frame(), h264_init_context(), h264_select_output_frame(), idct_put(), imc_decode_init(), init(), init_context_frame(), init_video_param(), ipvideo_decode_init(), jpeg_put_comments(), lame_window_init(), libkvazaar_init(), libvorbis_encode_init(), libvorbis_setup(), libx265_encode_init(), main(), mark_pns(), mimic_decode_init(), mp3lame_encode_init(), mpeg1_decode_sequence(), mpeg1_encode_sequence_header(), mpeg4_encode_gop_header(), mpeg4_encode_vol_header(), mpeg_decode_frame(), mpeg_decode_sequence_extension(), mpeg_get_pixelformat(), mpeg_motion_internal(), mpeg_motion_lowres(), MPV_motion_lowres(), mpv_reconstruct_mb_internal(), new_output_stream(), new_video_stream(), nvenc_setup_encoder(), nvenc_setup_h264_config(), nvenc_setup_hevc_config(), omx_encode_frame(), omx_encode_init(), on2avc_decode_init(), open_output_file(), opus_encode_init(), pixlet_decode_frame(), png_enc_init(), print_final_stats(), print_report(), psy_3gpp_init(), put_com(), put_pce(), qpel_motion(), ra288_decode_init(), render_slice(), search_for_pns(), search_for_quantizers_twoloop(), select_input_picture(), select_rc_mode(), set_encoder_id(), smvjpeg_decode_init(), storeframe(), svc_encode_frame(), svc_encode_init(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_init(), svq3_decode_init(), svq3_mc_dir_part(), tdsc_init(), tgq_idct_put_mb(), tgq_idct_put_mb_dconly(), tqi_idct_put(), twolame_encode_init(), unpack_dct_coeffs(), update_context_from_user(), update_size(), v4l2_prepare_encoder(), vaapi_encode_init_packed_headers(), vaapi_encode_init_rate_control(), validate_thread_parameters(), vble_decode_frame(), vc1_decode_b_mb(), vc1_decode_b_mb_intfi(), vc1_decode_b_mb_intfr(), vc1_decode_frame(), vc1_decode_i_blocks(), vc1_decode_i_blocks_adv(), vc1_decode_init(), vc1_decode_p_mb(), vc1_decode_p_mb_intfi(), vc1_decode_p_mb_intfr(), vc1_put_blocks_clamped(), vc2_encode_frame(), vorbis_encode_init(), vorbis_parse_id_hdr(), vp3_decode_init(), vpx_encode(), vpx_free(), vpx_init(), vtenc_cm_to_avpacket(), vtenc_configure_encoder(), vtenc_output_callback(), write_slice_end(), X264_init(), xavs2_init(), XAVS_init(), and xvid_encode_init().

int AVCodecContext::flags2
uint8_t* AVCodecContext::extradata

some codecs need / can use extradata like Huffman tables.

MJPEG: Huffman tables rv10: additional flags MPEG-4: global headers (they can be in the bitstream or here) The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger than extradata_size to avoid problems if it is read with the bitstream reader. The bytewise contents of extradata must not depend on the architecture or CPU endianness. Must be allocated with the av_malloc() family of functions.

  • encoding: Set/allocated/freed by libavcodec.
  • decoding: Set/allocated/freed by user.
Examples:
qsvdec.c.

Definition at line 1634 of file avcodec.h.

Referenced by a64multi_encode_frame(), a64multi_encode_init(), aac_decode_init(), aac_encode_close(), aac_encode_init(), aasc_decode_init(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adx_decode_init(), alac_encode_close(), alac_encode_init(), alac_set_info(), amf_encode_init_h264(), amf_encode_init_hevc(), ape_decode_init(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), atrac9_decode_init(), av1_parser_parse(), av_bitstream_filter_filter(), av_get_audio_frame_duration(), av_parser_change(), avcodec_close(), avcodec_copy_context(), avcodec_free_context(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avformat_find_stream_info(), avpriv_bprint_to_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), clv_decode_init(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), copy_context_reset(), cuvid_decode_init(), decode_chunks(), decode_ext_header(), decode_flush(), decode_frame(), decode_header_trees(), decode_init(), dfa_decode_frame(), dummy_close(), dummy_init(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_end(), encode_ext_header(), encode_init(), extract_extradata(), extract_header(), fdk_aac_decode_init(), ff_flac_is_extradata_valid(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mpv_encode_end(), ff_mss12_decode_init(), ff_opus_parse_extradata(), ff_vaapi_encode_init(), ffat_init_decoder(), ffat_init_encoder(), ffmmal_decode(), flac_decode_init(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flic_decode_init(), generate_fake_vps(), get_nb_samples(), h264_decode_init(), h264_parse(), hevc_decode_init(), hevc_parse(), hnm_decode_init(), idcin_decode_init(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), libcelt_dec_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libkvazaar_close(), libkvazaar_init(), libopus_decode_init(), libopus_encode_close(), libopus_encode_init(), libopus_write_header(), libspeex_decode_init(), libvorbis_encode_close(), libvorbis_encode_init(), libx265_encode_init(), m101_decode_frame(), m101_decode_init(), magy_encode_init(), main(), metasound_decode_init(), microdvd_init(), mov_text_encode_init(), mov_text_tx3g(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), mpeg4_decode_header(), mpeg_decode_frame(), msrle_decode_init(), msvideo1_decode_init(), mvc_decode_init(), nvenc_setup_extradata(), oggvorbis_decode_init(), omx_encode_frame(), omx_encode_init(), opus_encode_end(), opus_encode_init(), opus_find_frame_end(), opus_write_extradata(), put_audio_specific_config(), qdm2_decode_init(), qdmc_decode_init(), qsv_retrieve_enc_params(), raw_init_decoder(), read_audio_mux_element(), read_extra_header(), read_specific_config(), rkmpp_send_packet(), rl2_decode_init(), rscc_init(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), set_extradata(), smvjpeg_decode_init(), svc_encode_init(), svq3_decode_init(), tta_decode_init(), twinvq_decode_init(), utvideo_encode_init(), vc1_decode_init(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_close(), vorbis_encode_init(), vqa_decode_init(), vtenc_output_callback(), vtenc_populate_extradata(), wavesynth_parse_extradata(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), X264_close(), X264_init(), XAVS_close(), XAVS_init(), xma_decode_init(), xvid_encode_close(), xvid_encode_init(), xvid_strip_vol_header(), and yop_decode_init().

int AVCodecContext::extradata_size
Examples:
qsvdec.c.

Definition at line 1635 of file avcodec.h.

Referenced by a64multi_encode_init(), aac_decode_init(), aac_encode_init(), aasc_decode_init(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), adx_decode_init(), alac_decode_init(), alac_encode_close(), alac_encode_init(), alac_set_info(), amf_encode_init_h264(), amf_encode_init_hevc(), ape_decode_init(), ass_decode_init(), ass_encode_init(), atrac3_decode_init(), atrac9_decode_init(), av1_parser_parse(), av_bitstream_filter_filter(), av_parser_change(), avcodec_copy_context(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avpriv_bprint_to_extradata(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), clv_decode_init(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), copy_context_reset(), cuvid_decode_init(), decode_ext_header(), decode_flush(), decode_frame(), decode_header_trees(), decode_init(), dfa_decode_frame(), dummy_close(), dummy_init(), dvbsub_init_decoder(), dvdsub_parse_extradata(), encode_close(), encode_ext_header(), encode_init(), extract_extradata(), extract_header(), fdk_aac_decode_init(), ff_flac_is_extradata_valid(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_mjpeg_decode_init(), ff_mss12_decode_init(), ff_opus_parse_extradata(), ff_vaapi_encode_init(), ffat_init_decoder(), ffat_init_encoder(), ffmmal_decode(), flac_encode_close(), flac_encode_frame(), flac_encode_init(), flic_decode_init(), generate_fake_vps(), h264_decode_init(), h264_parse(), hevc_decode_init(), hevc_parse(), hnm_decode_init(), idcin_decode_init(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_decode_init(), libcelt_dec_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libkvazaar_init(), libopus_decode_init(), libopus_encode_init(), libspeex_decode_init(), libvorbis_encode_init(), libx265_encode_init(), m101_decode_init(), magy_encode_init(), main(), metasound_decode_init(), mov_text_encode_init(), mov_text_tx3g(), mp_decode_init(), mpc7_decode_init(), mpc8_decode_init(), mpeg4_decode_header(), mpeg_decode_frame(), msrle_decode_init(), msvideo1_decode_init(), mvc_decode_init(), nvenc_setup_extradata(), oggvorbis_decode_init(), omx_encode_frame(), omx_encode_init(), opus_encode_init(), print_final_stats(), put_audio_specific_config(), qdm2_decode_init(), qdmc_decode_init(), qsv_retrieve_enc_params(), raw_init_decoder(), read_extra_header(), read_header(), read_specific_config(), rkmpp_send_packet(), rl2_decode_init(), rscc_init(), rv10_decode_init(), rv20_decode_picture_header(), rv30_decode_init(), rv30_parse_slice_header(), set_extradata(), smvjpeg_decode_init(), svc_encode_init(), svq3_decode_init(), tta_decode_init(), twinvq_decode_init(), utvideo_encode_init(), vc1_decode_init(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vqa_decode_init(), vtenc_populate_extradata(), wavesynth_parse_extradata(), wma_decode_init(), wmavoice_decode_init(), wmv2_encode_init(), write_extradata(), X264_init(), XAVS_init(), xma_decode_init(), xvid_encode_init(), xvid_strip_vol_header(), and yop_decode_init().

AVRational AVCodecContext::time_base

This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.

For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1. This often, but not always is the inverse of the frame rate or field rate for video. 1/time_base is not the average frame rate if the frame rate is not constant.

Like containers, elementary streams also can store timestamps, 1/time_base is the unit in which these timestamps are specified. As example of such codec time base see ISO/IEC 14496-2:2001(E) vop_time_increment_resolution and fixed_vop_rate (fixed_vop_rate == 0 implies that it is different from the framerate)

  • encoding: MUST be set by user.
  • decoding: the use of this field for decoding is deprecated. Use framerate instead.
Examples:
demuxing_decoding.c, encode_video.c, muxing.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1656 of file avcodec.h.

Referenced by add_stream(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_init(), av_bitstream_filter_filter(), av_stream_get_codec_timebase(), avcodec_decode_subtitle2(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_transfer_internal_stream_timing_info(), check_recording_time(), close_output_stream(), config_input(), config_props(), cpia_decode_init(), dec_enc(), decode_packet(), decode_vol_header(), decode_vop_header(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dvd_nav_parse(), dvvideo_encode_init(), encode_ext_header(), encode_frame_rate(), encode_init(), estimate_best_b_count(), ff_af_queue_add(), ff_compute_frame_duration(), ff_flv_encode_picture_header(), ff_guess_coded_bitrate(), ff_h261_encode_picture_header(), ff_h263_encode_picture_header(), ff_mjpeg_decode_sof(), ff_mpeg4_encode_picture_header(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_msmpeg4_encode_ext_header(), ff_qsv_encode(), ff_samples_to_time_base(), ff_set_mpeg4_time(), find_frame_rate_index(), flush_encoders(), get_audio_frame(), get_fps(), get_video_frame(), h264_decode_init(), h264_parse(), init_context_defaults(), init_encoder_time_base(), init_filter(), init_output_stream(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), libkvazaar_init(), libwebp_anim_encode_frame(), libx265_encode_init(), main(), mpeg4_decode_header(), mpeg4_encode_gop_header(), mpeg4_encode_vol_header(), mpegvideo_extract_headers(), nvenc_setup_encoder(), oggvorbis_decode_init(), omx_component_init(), omx_encode_frame(), open_output_file(), optimum_dist(), optimum_use15_7(), parse_forced_key_frames(), reap_filters(), set_frame_distances(), show_stream(), submit_frame(), svc_encode_init(), tb_unreliable(), test_copy(), update_context_from_thread(), v4l2_get_pts(), v4l2_set_pts(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_rate_control(), vc1_extract_header(), vc2_encode_frame(), vc2_encode_init(), vpx_init(), vtenc_cm_to_avpacket(), vtenc_send_frame(), write_audio_frame(), write_video_frame(), X264_init(), XAVS_init(), xvid_correct_framerate(), and xvid_encode_init().

int AVCodecContext::ticks_per_frame
int AVCodecContext::delay

Codec delay.

Encoding: Number of frames delay there will be from the encoder input to the decoder output. (we assume the decoder matches the spec) Decoding: Number of frames delay in addition to what a standard decoder as specified in the spec would produce.

Video: Number of frames the decoded output will be delayed relative to the encoded input.

Audio: For encoding, this field is unused (see initial_padding).

For decoding, this is the number of samples the decoder needs to output before the decoder's output is valid. When seeking, you should start decoding this many samples prior to your desired seek point.

  • encoding: Set by libavcodec.
  • decoding: Set by libavcodec.

Definition at line 1689 of file avcodec.h.

Referenced by avcodec_parameters_to_context(), ff_mpv_encode_init(), ff_opus_parse_extradata(), libopus_decode_init(), and update_context_from_thread().

int AVCodecContext::width

picture width / height.

Note
Those fields may not match the values of the last AVFrame output by avcodec_decode_video2 due frame reordering.
  • encoding: MUST be set by user.
  • decoding: May be set by the user before opening the decoder if known e.g. from the container. Some decoders will require the dimensions to be set by the caller. During decoding, the decoder may overwrite those values as required while parsing the data.
Examples:
demuxing_decoding.c, encode_video.c, filtering_video.c, muxing.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1706 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_input_streams(), add_stream(), aic_decode_header(), aic_decode_init(), alloc_buffers(), alloc_frame_buffer(), amf_copy_surface(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_decode(), aom_init(), apply_param_change(), aura_decode_frame(), aura_decode_init(), avcodec_encode_video2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitpacked_decode_uyvy422(), bitpacked_decode_yuv422p10(), bitpacked_init_decoder(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), choose_tiling(), chunky2chunky(), cinepak_decode_init(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), clear_plane(), cllc_decode_frame(), clv_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), compress_texture(), compute_crc_of_packets(), compute_dar(), config_input(), config_props(), create_cv_pixel_buffer_info(), cuvid_handle_video_sequence(), cuvid_init(), cuvid_output_frame(), cyuv_decode_init(), davs2_dump_frames(), dds_decode(), dec_enc(), decode_13(), decode_argb(), decode_argbi(), decode_argx(), decode_argxi(), decode_aybr(), decode_aybri(), decode_block(), decode_byry(), decode_byryi(), decode_c82i(), decode_c82p(), decode_ca2i(), decode_ca2p(), decode_ca4i(), decode_ca4p(), decode_dlta(), decode_fint(), decode_frame(), decode_frame_header(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_inter(), decode_intra(), decode_mous(), decode_move(), decode_p_frame(), decode_picture_header(), decode_rgb(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_rle(), decode_rle16(), decode_rle_bpp2(), decode_rle_bpp4(), decode_sequence_header_adv(), decode_simple_internal(), decode_video(), decode_ybr(), decode_ybr10(), decode_ybr10i(), decode_ybri(), decode_ybyr(), decode_yry10(), decode_yry10i(), decompress_i(), decompress_p(), dfa_decode_frame(), dfa_decode_init(), dirac_unpack_idwt_params(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), draw_cursor(), draw_horiz_band(), dv_write_pack(), dvbsub_decode(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_encode_init(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxv_init(), encode_apng(), encode_frame(), encode_frame_size(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_picture_ls(), encode_png(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), execute_code(), export_stream_params(), ff_amf_send_frame(), ff_asv_common_init(), ff_ccitt_unpack(), ff_dnxhd_find_cid(), ff_ffv1_common_init(), ff_ffv1_init_slice_contexts(), ff_guess_coded_bitrate(), ff_h264_update_thread_context(), ff_huffyuv_common_init(), ff_libwebp_get_frame(), ff_mediacodec_sw_buffer_copy_yuv420_packed_semi_planar(), ff_mediacodec_sw_buffer_copy_yuv420_planar(), ff_mediacodec_sw_buffer_copy_yuv420_semi_planar(), ff_mjpeg_encode_picture_header(), ff_mpeg_update_thread_context(), ff_mpv_encode_init(), ff_mpv_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_qsv_process_data(), ff_set_dimensions(), ff_set_sar(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_get_buffer(), ff_videotoolbox_alloc_frame(), ff_vp56_decode_frame(), ffmal_copy_frame(), ffmal_update_format(), ffmmal_init_decoder(), fic_decode_frame(), fic_decode_init(), fic_draw_cursor(), fill_picture_parameters(), find_slice_quant(), fits_encode_frame(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_24BPP(), flic_decode_frame_8BPP(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_frame(), gdv_decode_init(), get_buffer_internal(), get_buffer_with_edge(), get_cv_pixel_info(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), h264_init_context(), halfpel_interpol(), hap_init(), has_codec_parameters(), hnm_decode_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), hscroll(), idcin_decode_vlcs(), idct_put(), init(), init_bundles(), init_dimensions(), init_filter(), init_filters(), init_image(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipvideo_decode_format_06_opcodes(), ipvideo_decode_format_10_opcodes(), ipvideo_decode_format_11_opcodes(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_frame(), j2kenc_init(), jpeg_table_header(), lag_decode_arith_plane(), lag_decode_frame(), libkvazaar_init(), libopenjpeg_copy_packed12(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_init(), librsvg_decode_frame(), libwebp_anim_encode_init(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_init(), ljpeg_encode_yuv(), LLVMFuzzerTestOneInput(), load_buffer(), m101_decode_frame(), magy_encode_frame(), magy_encode_init(), main(), mca(), mediacodec_dec_parse_format(), mediacodec_decode_init(), mediacodec_wrap_hw_buffer(), mediacodec_wrap_sw_buffer(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mm_decode_inter(), mm_decode_intra(), motion_compensation(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_decode_line(), mp_read_changes_map(), mpeg4_decode_header(), mpegvideo_extract_headers(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), mss4_decode_init(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), msvideo1_decode_frame(), mvc_decode_frame(), mvc_decode_init(), new_subtitle_stream(), new_video_stream(), nvenc_alloc_surface(), nvenc_check_capabilities(), nvenc_copy_frame(), nvenc_setup_encoder(), omx_component_init(), omx_encode_frame(), open_output_file(), open_video(), paf_video_init(), pam_encode_frame(), parse_object_segment(), parse_presentation_segment(), pcx_encode_frame(), pixlet_decode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), qtrle_encode_init(), read_argb_line(), read_rgb24_component_line(), read_yuv_component_line(), receive_frame(), reget_buffer_internal(), rkmpp_retrieve_frame(), rl2_decode_init(), rl2_rle_decode(), rle_uncompress(), roq_decode_init(), roq_encode_init(), rpza_decode_stream(), rscc_decode_frame(), rscc_init(), screenpresso_decode_frame(), screenpresso_init(), sgirle_decode_frame(), smc_decode_frame(), smc_decode_stream(), smvjpeg_decode_frame(), sp5x_decode_frame(), speedhq_decode_frame(), sub2video_get_blank_frame(), sub2video_prepare(), subtitle_thread(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svc_decode_frame(), svc_encode_frame(), svc_encode_init(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_init(), targa_encode_frame(), targa_encode_init(), tdsc_decode_frame(), tdsc_init(), tdsc_load_cursor(), tdsc_parse_tdsf(), teletext_init_decoder(), test_copy(), test_copy_print_codec(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), to_meta_with_crop(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion1_decode_init(), truemotion2rt_decode_frame(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_decode_init(), v308_encode_frame(), v308_encode_init(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_decode_init(), v410_encode_frame(), v410_encode_init(), v4l2_encode_init(), vaapi_encode_h264_configure(), vaapi_encode_h264_init(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_slice_structure(), vaapi_encode_mjpeg_init(), vaapi_encode_mjpeg_init_picture_params(), vaapi_encode_mpeg2_configure(), vaapi_encode_mpeg2_init(), vaapi_encode_mpeg2_init_sequence_params(), vaapi_encode_vp8_init(), vaapi_encode_vp8_init_sequence_params(), vaapi_encode_vp9_init(), vaapi_encode_vp9_init_sequence_params(), vaapi_mjpeg_start_frame(), vaapi_vp8_start_frame(), vaapi_vp9_start_frame(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc2_encode_init(), vcr1_decode_frame(), vcr1_decode_init(), video_decode(), video_decode_example(), vmd_decode(), vp7_decode_frame_header(), vp8_decode_frame_header(), vp8_lossy_decode_frame(), vpx_decode(), vpx_init(), vtenc_create_encoder(), vtenc_populate_extradata(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xan_wc3_output_pixel_run(), xavs2_init(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xpm_decode_frame(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_decode_init(), y41p_encode_frame(), y41p_encode_init(), yop_decode_frame(), yop_decode_init(), yuv4_decode_frame(), yuv4_encode_frame(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::height
Examples:
demuxing_decoding.c, encode_video.c, filtering_video.c, muxing.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1706 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), add_input_streams(), add_stream(), aic_decode_header(), aic_decode_init(), aic_decode_slice(), alloc_buffers(), alloc_frame_buffer(), amf_copy_surface(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_decode(), aom_init(), apply_param_change(), aura_decode_frame(), avcodec_encode_video2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), avui_decode_frame(), avui_encode_frame(), avui_encode_init(), bethsoftvid_decode_frame(), bfi_decode_frame(), bfi_decode_init(), bink_decode_plane(), binkb_decode_plane(), bitline2chunky(), bitpacked_decode_uyvy422(), bitpacked_decode_yuv422p10(), bitpacked_init_decoder(), bitplanar2chunky(), bmp_decode_frame(), bmp_encode_frame(), cdg_decode_frame(), cdg_decode_init(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cfhd_decode(), choose_tiling(), chunky2chunky(), cinepak_decode_init(), cinepak_decode_vectors(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), clear_plane(), cllc_decode_frame(), clv_decode_init(), cmv_decode_inter(), cmv_decode_intra(), cmv_process_header(), codec_reinit(), comp_block(), compress_texture(), compute_crc_of_packets(), compute_dar(), config_input(), config_props(), copy_plane(), create_cv_pixel_buffer_info(), cuvid_handle_video_sequence(), cuvid_init(), cuvid_output_frame(), cyuv_decode_init(), davs2_dump_frames(), dds_decode(), dec_enc(), decode_13(), decode_argb(), decode_argb_frame(), decode_argbi(), decode_argx(), decode_argxi(), decode_aybr(), decode_aybri(), decode_byry(), decode_byryi(), decode_c82i(), decode_c82p(), decode_ca2i(), decode_ca2p(), decode_ca4i(), decode_ca4p(), decode_dlta(), decode_fint(), decode_frame(), decode_frame_header(), decode_header(), decode_i2_frame(), decode_i_frame(), decode_init(), decode_inter(), decode_intra(), decode_kfrm(), decode_mous(), decode_move(), decode_p_block(), decode_p_frame(), decode_picture_header(), decode_rgb(), decode_rgb24_frame(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_rle(), decode_rle16(), decode_rle_bpp2(), decode_rle_bpp4(), decode_sequence_header_adv(), decode_simple_internal(), decode_video(), decode_ybr(), decode_ybr10(), decode_ybr10i(), decode_ybri(), decode_ybyr(), decode_yry10(), decode_yry10i(), decode_yuv_frame(), decompress_i(), decompress_p(), dfa_decode_frame(), dfa_decode_init(), dirac_unpack_idwt_params(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_init(), dnxhd_get_blocks(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), draw_cursor(), draw_horiz_band(), dv_write_pack(), dvbsub_decode(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_encode_init(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2(), dxv_init(), dxva2_h264_end_frame(), dxva2_mpeg2_end_frame(), dxva2_vc1_end_frame(), encode_apng(), encode_frame(), encode_frame_size(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_picture_ls(), encode_png(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), estimate_best_b_count(), execute_code(), export_stream_params(), ff_amf_send_frame(), ff_asv_common_init(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_er_frame_end(), ff_ffv1_common_init(), ff_ffv1_init_slice_contexts(), ff_guess_coded_bitrate(), ff_h264_draw_horiz_band(), ff_h264_update_thread_context(), ff_huffyuv_common_init(), ff_libwebp_get_frame(), ff_mediacodec_sw_buffer_copy_yuv420_packed_semi_planar(), ff_mediacodec_sw_buffer_copy_yuv420_planar(), ff_mediacodec_sw_buffer_copy_yuv420_semi_planar(), ff_mjpeg_decode_sof(), ff_mjpeg_encode_picture_header(), ff_mpeg_update_thread_context(), ff_mpv_encode_init(), ff_mpv_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_qsv_process_data(), ff_set_dimensions(), ff_set_sar(), ff_slice_thread_init(), ff_snow_alloc_blocks(), ff_snow_common_init_after_header(), ff_snow_get_buffer(), ff_videotoolbox_alloc_frame(), ff_vp56_decode_frame(), ffmal_copy_frame(), ffmmal_init_decoder(), fic_decode_frame(), fic_decode_init(), fic_draw_cursor(), fill_picture_parameters(), find_slice_quant(), fits_encode_frame(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flic_decode_frame_15_16BPP(), flic_decode_frame_24BPP(), flic_decode_frame_8BPP(), flip(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_frame(), gdv_decode_init(), get_buffer_internal(), get_buffer_with_edge(), get_cv_pixel_info(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), h264_init_context(), halfpel_interpol(), hap_init(), hnm_decode_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), hscroll(), idcin_decode_vlcs(), import_format(), init(), init_bundles(), init_dimensions(), init_filter(), init_filters(), init_image(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipvideo_decode_format_06_opcodes(), ipvideo_decode_format_10_opcodes(), ipvideo_decode_format_11_opcodes(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_frame(), j2kenc_init(), lag_decode_frame(), libkvazaar_init(), libopenjpeg_copy_packed12(), libopenjpeg_copy_packed16(), libopenjpeg_copy_packed8(), libopenjpeg_copy_unpacked16(), libopenjpeg_copy_unpacked8(), libopenjpeg_encode_init(), libwebp_anim_encode_init(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_yuv(), LLVMFuzzerTestOneInput(), load_buffer(), m101_decode_frame(), magy_encode_frame(), magy_encode_init(), main(), mca(), mediacodec_dec_parse_format(), mediacodec_decode_init(), mediacodec_wrap_hw_buffer(), mediacodec_wrap_sw_buffer(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mm_decode_inter(), mm_decode_intra(), motion_compensation(), mp_decode_frame(), mp_decode_frame_helper(), mp_decode_init(), mp_read_changes_map(), mpeg4_decode_header(), mpegvideo_extract_headers(), msrle_decode_8_16_24_32(), msrle_decode_frame(), msrle_decode_pal4(), mss1_decode_frame(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_frame(), mss3_decode_init(), mss4_decode_frame(), msvideo1_decode_16bit(), msvideo1_decode_8bit(), msvideo1_decode_frame(), mvc_decode_frame(), mvc_decode_init(), new_subtitle_stream(), new_video_stream(), nvenc_alloc_surface(), nvenc_check_capabilities(), nvenc_copy_frame(), nvenc_setup_encoder(), omx_component_init(), omx_encode_frame(), open_output_file(), open_video(), paf_video_init(), pam_encode_frame(), parse_object_segment(), parse_palette_segment(), parse_presentation_segment(), pcx_encode_frame(), pixlet_decode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), qtrle_decode_16bpp(), qtrle_decode_1bpp(), qtrle_decode_24bpp(), qtrle_decode_2n4bpp(), qtrle_decode_32bpp(), qtrle_decode_8bpp(), qtrle_decode_frame(), qtrle_encode_init(), receive_frame(), reget_buffer_internal(), rkmpp_retrieve_frame(), rl2_decode_init(), rl2_rle_decode(), roq_decode_init(), roq_encode_init(), rpza_decode_stream(), rscc_decode_frame(), rscc_init(), screenpresso_decode_frame(), screenpresso_init(), sgirle_decode_frame(), smc_decode_frame(), smc_decode_stream(), smvjpeg_decode_frame(), sp5x_decode_frame(), speedhq_decode_frame(), sub2video_get_blank_frame(), sub2video_prepare(), subtitle_thread(), sunrast_encode_init(), sunrast_image_write_header(), sunrast_image_write_image(), svc_decode_frame(), svc_encode_frame(), svc_encode_init(), svq1_decode_init(), svq1_encode_end(), svq1_encode_init(), svq3_decode_frame(), svq3_decode_init(), targa_encode_frame(), targa_encode_init(), tdsc_decode_frame(), tdsc_init(), tdsc_load_cursor(), tdsc_parse_tdsf(), teletext_init_decoder(), test_copy(), test_copy_print_codec(), tgq_decode_frame(), tgv_decode_frame(), tgv_decode_inter(), tm2_decode_blocks(), tm2_motion_block(), tmv_decode_frame(), to_meta_with_crop(), truemotion1_decode_16bit(), truemotion1_decode_24bit(), truemotion1_decode_header(), truemotion2rt_decode_frame(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_frame(), v308_encode_frame(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_encode_frame(), v4l2_encode_init(), vaapi_encode_h264_configure(), vaapi_encode_h264_init(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_slice_structure(), vaapi_encode_mjpeg_init(), vaapi_encode_mjpeg_init_picture_params(), vaapi_encode_mpeg2_configure(), vaapi_encode_mpeg2_init(), vaapi_encode_mpeg2_init_sequence_params(), vaapi_encode_vp8_init(), vaapi_encode_vp8_init_sequence_params(), vaapi_encode_vp9_init(), vaapi_encode_vp9_init_sequence_params(), vaapi_h264_end_frame(), vaapi_mjpeg_start_frame(), vaapi_mpeg2_end_frame(), vaapi_mpeg4_end_frame(), vaapi_vc1_end_frame(), vaapi_vp8_start_frame(), vaapi_vp9_start_frame(), vb_decode_framedata(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc2_encode_init(), vcr1_decode_frame(), vcr1_decode_init(), vdpau_h264_end_frame(), video_decode(), video_decode_example(), vmd_decode(), vp7_decode_frame_header(), vp8_decode_frame_header(), vp8_lossy_decode_frame(), vpx_decode(), vpx_init(), vtenc_create_encoder(), vtenc_populate_extradata(), X264_init(), xan_decode_chroma(), xan_decode_frame(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), xan_wc3_copy_pixel_run(), xan_wc3_decode_frame(), xavs2_init(), XAVS_init(), xbm_decode_frame(), xbm_encode_frame(), xface_decode_init(), xface_encode_frame(), xpm_decode_frame(), xvid_encode_frame(), xvid_encode_init(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_frame(), y41p_decode_frame(), y41p_encode_frame(), yop_decode_frame(), yop_decode_init(), yuv4_decode_frame(), yuv4_encode_frame(), zero12v_decode_frame(), zerocodec_decode_frame(), and zmbv_me().

int AVCodecContext::coded_width

Bitstream width / height, may be different from width/height e.g.

when the decoded frame is cropped before being output or lowres is enabled.

Note
Those field may not match the value of the last AVFrame output by avcodec_receive_frame() due frame reordering.
  • encoding: unused
  • decoding: May be set by the user before opening the decoder if known e.g. from the container. During decoding, the decoder may overwrite those values as required while parsing the data.
Examples:
qsvdec.c.

Definition at line 1721 of file avcodec.h.

Referenced by add_input_streams(), avcodec_default_get_buffer2(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), copy_block(), copyadd_block(), cuvid_decode_init(), dds_decode(), decode_init(), decompress_texture_thread(), decompress_texture_thread_internal(), dnxhd_decode_init(), dump_stream_format(), dxv_decode(), dxv_init(), export_stream_params(), ff_dv_frame_profile(), ff_dxva2_common_frame_params(), ff_h263_decode_frame(), ff_h264_update_thread_context(), ff_mpeg_update_thread_context(), ff_mpv_decode_init(), ff_mss12_decode_init(), ff_nvdec_decode_init(), ff_nvdec_frame_params(), ff_qsv_process_data(), ff_set_dimensions(), ff_vaapi_decode_init(), ff_vc1_interp_mc(), ff_vc1_mc_1mv(), ff_vc1_mc_4mv_chroma(), ff_vc1_mc_4mv_chroma4(), ff_vc1_mc_4mv_luma(), ff_vdpau_common_init(), ff_vdpau_common_reinit(), ff_vp56_decode_frame(), get_buffer_internal(), get_format(), h261_decode_frame(), h264_init_ps(), hap_decode(), hap_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), init_dimensions(), magy_decode_frame(), magy_decode_slice(), magy_decode_slice10(), mpeg4_decode_header(), mpeg_decode_init(), mpegvideo_extract_headers(), open_input_file(), qsv_decode_init(), qsv_init(), rv10_decode_init(), rv30_decode_init(), show_stream(), sp5x_decode_frame(), speedhq_decode_frame(), txd_decode_frame(), update_context_from_thread(), update_dimensions(), v4l2_decode_init(), v4l2_try_start(), vaapi_decode_make_config(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), verify_md5(), vp3_decode_init(), and vp56_size_changed().

int AVCodecContext::coded_height
Examples:
qsvdec.c.

Definition at line 1721 of file avcodec.h.

Referenced by add_input_streams(), avcodec_default_get_buffer2(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), copy_block(), copyadd_block(), cuvid_decode_init(), dds_decode(), decode_init(), decompress_texture_thread(), decompress_texture_thread_internal(), dnxhd_decode_init(), dump_stream_format(), dxv_decode(), dxv_init(), export_stream_params(), ff_dv_frame_profile(), ff_dxva2_common_frame_params(), ff_h263_decode_frame(), ff_h264_update_thread_context(), ff_mjpeg_decode_init(), ff_mpeg_update_thread_context(), ff_mpv_decode_init(), ff_mss12_decode_init(), ff_nvdec_decode_init(), ff_nvdec_frame_params(), ff_qsv_process_data(), ff_set_dimensions(), ff_vaapi_decode_init(), ff_vc1_interp_mc(), ff_vc1_mc_1mv(), ff_vc1_mc_4mv_chroma(), ff_vc1_mc_4mv_chroma4(), ff_vc1_mc_4mv_luma(), ff_vdpau_common_init(), ff_vdpau_common_reinit(), ff_vp56_decode_frame(), get_buffer_internal(), get_format(), h261_decode_frame(), h264_init_ps(), hap_decode(), hap_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), init_dimensions(), magy_decode_frame(), magy_decode_slice(), magy_decode_slice10(), mpeg4_decode_header(), mpeg_decode_init(), mpegvideo_extract_headers(), open_input_file(), qsv_decode_init(), qsv_init(), rv10_decode_init(), rv30_decode_init(), show_stream(), sp5x_decode_frame(), speedhq_decode_frame(), txd_decode_frame(), update_context_from_thread(), update_dimensions(), v4l2_decode_init(), v4l2_try_start(), vaapi_decode_make_config(), vaapi_vc1_decode_slice(), vaapi_vc1_start_frame(), vc1_decode_frame(), vc1_decode_init(), vcr2_init_sequence(), verify_md5(), vp3_decode_init(), and vp56_size_changed().

int AVCodecContext::gop_size
enum AVPixelFormat AVCodecContext::pix_fmt

Pixel format, see AV_PIX_FMT_xxx.

May be set by the demuxer if known from headers. May be overridden by the decoder if it knows better.

Note
This field may not match the value of the last AVFrame output by avcodec_receive_frame() due frame reordering.
  • encoding: Set by user.
  • decoding: Set by user if known, overridden by libavcodec while parsing the data.
Examples:
demuxing_decoding.c, encode_video.c, filtering_video.c, muxing.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1743 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), add_stream(), aic_decode_init(), alloc_buffers(), alloc_frame_buffer(), amf_init_encoder(), aom_decode(), aura_decode_init(), avcodec_align_dimensions(), avcodec_align_dimensions2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), avs_decode_init(), avui_decode_init(), bethsoftvid_decode_init(), bfi_decode_init(), bitpacked_decode_uyvy422(), bitpacked_init_decoder(), bmp_decode_frame(), bmp_encode_frame(), bmp_encode_init(), cdg_decode_init(), cdxl_decode_frame(), cfhd_decode(), choose_pix_fmts(), cinepak_decode_init(), cinepak_encode_end(), cinepak_encode_init(), cinvideo_decode_init(), cllc_decode_frame(), clv_decode_init(), cmv_decode_init(), commit_bitstream_and_slice_buffer(), compute_crc_of_packets(), config_input(), config_props(), copy_frame(), cpia_decode_init(), create_cv_pixel_buffer(), create_cv_pixel_buffer_info(), cuvid_decode_init(), cuvid_output_frame(), cyuv_decode_frame(), davs2_dump_frames(), dds_decode(), dec_enc(), decode(), decode_fctl_chunk(), decode_fint(), decode_frame(), decode_frame_header(), decode_header(), decode_idat_chunk(), decode_init(), decode_plane(), decode_simple_internal(), decode_slice(), decode_slice_thread(), decode_studio_vol_header(), decode_video(), decode_wmv9(), dfa_decode_init(), dirac_decode_data_unit(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_encode_thread(), dnxhd_write_header(), draw_cursor(), draw_horiz_band(), dvvideo_decode_frame(), dvvideo_encode_frame(), dvvideo_encode_init(), dxtory_decode_v1_410(), dxtory_decode_v1_420(), dxtory_decode_v1_444(), dxtory_decode_v1_rgb(), dxtory_decode_v2(), dxv_decode(), encode_frame(), encode_init(), encode_init_ls(), encode_picture_ls(), encode_plane(), encode_slice(), escape124_decode_init(), escape130_decode_init(), estimate_best_b_count(), export_stream_params(), extract_header(), ff_cavs_init(), ff_decode_frame_props(), ff_draw_horiz_band(), ff_dxva2_commit_buffer(), ff_dxva2_common_end_frame(), ff_dxva2_get_surface_index(), ff_dxva2_is_d3d11(), ff_guess_coded_bitrate(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_draw_horiz_band(), ff_huffyuvencdsp_init_x86(), ff_jpegls_decode_lse(), ff_libwebp_get_frame(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sof(), ff_mjpeg_decode_sos(), ff_mjpeg_encode_picture_header(), ff_mjpeg_init_hvsample(), ff_mpv_common_init(), ff_mpv_encode_init(), ff_mpv_frame_start(), ff_nvenc_encode_close(), ff_nvenc_encode_init(), ff_pnm_decode_header(), ff_print_debug_info2(), ff_qsv_process_data(), ff_rv34_decode_init(), ff_snow_common_init_after_header(), ff_videotoolbox_alloc_frame(), ff_vp56_decode_frame(), ff_vp56_init_context(), ffmal_copy_frame(), ffmal_update_format(), ffmmal_init_decoder(), fic_decode_init(), filter(), fits_decode_frame(), fits_encode_frame(), flashsv_decode_init(), flic_decode_frame(), flic_decode_init(), frame_end(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_init(), get_buffer_internal(), get_buffer_with_edge(), get_pixel_format(), get_siz(), gif_decode_init(), gif_encode_frame(), gif_encode_init(), h261_decode_init(), h263_get_format(), h264_init_ps(), h264_slice_header_init(), handle_p_frame_apng(), hap_init(), has_codec_parameters(), hls_slice_header(), hnm_decode_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), idcin_decode_init(), init(), init_context_defaults(), init_decoder(), init_filter(), init_filters(), init_image(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipvideo_decode_init(), ir2_decode_init(), j2kenc_init(), jpeg2000_decode_frame(), jpeg_put_comments(), lag_decode_arith_plane(), lag_decode_frame(), lag_pred_line(), libkvazaar_encode(), libopenjpeg_decode_frame(), libopenjpeg_encode_frame(), librsvg_decode_frame(), libx265_encode_frame(), libx265_encode_init(), ljpeg_encode_bgr(), ljpeg_encode_frame(), ljpeg_encode_init(), load_input_picture(), m101_decode_frame(), m101_decode_init(), magy_decode_frame(), magy_encode_init(), main(), mediacodec_dec_parse_format(), mediacodec_wrap_hw_buffer(), mediacodec_wrap_sw_buffer(), mimic_decode_frame(), mj2_create_image(), mjpeg_decode_scan(), mm_decode_init(), mp_decode_init(), msrle_decode_frame(), msrle_decode_init(), mss1_decode_init(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), msvideo1_decode_8bit(), msvideo1_decode_init(), mvc_decode_init(), new_video_stream(), nvenc_alloc_surface(), nvenc_register_frame(), nvenc_setup_device(), nvenc_upload_frame(), omx_encode_frame(), open_output_file(), open_video(), paf_video_init(), pam_encode_frame(), parse_palette(), parse_pixel_format(), pcx_decode_frame(), pcx_encode_frame(), pix_decode_frame(), pixlet_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), process_output_surface(), prores_encode_init(), ptx_decode_frame(), put_cod(), qsv_decode(), qsv_decode_init(), qtrle_decode_init(), qtrle_encode_init(), qtrle_encode_line(), raw_encode_init(), raw_init_decoder(), read_header(), reget_buffer_internal(), rkmpp_init_decoder(), rl2_decode_init(), roq_decode_init(), rpza_decode_init(), rscc_decode_frame(), rscc_init(), rv10_decode_init(), screenpresso_decode_frame(), seqvideo_decode_init(), set_pix_fmt(), set_sps(), setup_hwaccel_for_pixfmt(), sgirle_decode_init(), smc_decode_init(), smvjpeg_decode_frame(), speedhq_decode_init(), sunrast_decode_frame(), sunrast_encode_init(), svc_decode_frame(), svc_decode_init(), svq1_decode_init(), svq1_encode_frame(), svq3_decode_init(), targa_encode_frame(), tdsc_init(), tgq_decode_init(), tgv_decode_init(), tiff_unpack_fax(), tiff_unpack_strip(), tmv_decode_init(), tqi_decode_init(), truemotion1_decode_header(), truemotion2rt_decode_init(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_dimensions(), update_frame_pool(), update_size(), utvideo_encode_frame(), utvideo_encode_init(), v308_decode_init(), v408_decode_init(), v410_decode_init(), v4l2_decode_init(), v4l2_encode_init(), v4l2_try_start(), vble_decode_init(), vc1_decode_init(), vc2_encode_init(), vcr1_decode_init(), vcr2_init_sequence(), video_decode(), video_decode_example(), vmdvideo_decode_init(), vp3_decode_init(), vp78_decode_frame(), vp78_decode_init(), vp8_lossless_decode_frame(), vp8_lossy_decode_frame(), vpx_decode(), vpx_init(), vqa_decode_init(), vtenc_configure_encoder(), vtenc_populate_extradata(), X264_frame(), X264_init(), xan_decode_init(), xavs2_init(), xbm_decode_frame(), xface_decode_init(), xpm_decode_frame(), xvid_encode_frame(), xwd_decode_frame(), xwd_encode_frame(), y216_decode_init(), y41p_decode_init(), yop_decode_init(), yuv4_decode_init(), zero12v_decode_init(), and zerocodec_decode_init().

void(* AVCodecContext::draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)

If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.

It improves cache usage. Not all codecs can do that. You must check the codec capabilities beforehand. When multithreading is used, it may be called from multiple threads at the same time; threads might draw different parts of the same AVFrame, or multiple AVFrames, and there is no guarantee that slices will be drawn in order. The function is also used by hardware acceleration APIs. It is called at least once during frame decoding to pass the data needed for hardware render. In that mode instead of pixel data, AVFrame points to a structure specific to the acceleration API. The application reads the structure and can change some fields to indicate progress or mark state.

  • encoding: unused
  • decoding: Set by user.
    Parameters
    heightthe height of the slice
    ythe y position of the slice
    type1->top field, 2->bottom field, 3->frame
    offsetoffset into the AVFrame.data from which the slice should be read

Definition at line 1768 of file avcodec.h.

Referenced by draw_slice(), ff_draw_horiz_band(), ff_h264_draw_horiz_band(), ff_init_block_index(), mpv_reconstruct_mb_internal(), update_context_from_user(), video_decode(), and vp3_draw_horiz_band().

enum AVPixelFormat(* AVCodecContext::get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)

callback to negotiate the pixelFormat

Parameters
fmtis the list of formats which are supported by the codec, it is terminated by -1 as 0 is a valid format, the formats are ordered by quality. The first is always the native one.
Note
The callback may be called again immediately if initialization for the selected (hardware-accelerated) pixel format failed.
Warning
Behavior is undefined if the callback returns a value not in the fmt list of formats.
Returns
the chosen format
  • encoding: unused
  • decoding: Set by user, if not set the native format will be chosen.
Examples:
hw_decode.c, qsvdec.c, and vaapi_transcode.c.

Definition at line 1785 of file avcodec.h.

Referenced by ff_get_format(), ff_thread_get_format(), init_context_defaults(), init_input_stream(), main(), open_input_file(), and submit_packet().

int AVCodecContext::max_b_frames
float AVCodecContext::b_quant_factor

qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

  • encoding: Set by user.
  • decoding: unused

Definition at line 1802 of file avcodec.h.

Referenced by get_diff_limited_q(), get_qminmax(), get_qscale(), init_video_param(), set_constqp(), set_vbr(), vaapi_encode_h264_configure(), vaapi_encode_h265_configure(), vaapi_encode_mpeg2_configure(), vaapi_encode_vp9_configure(), X264_init(), XAVS_init(), and xvid_encode_init().

attribute_deprecated int AVCodecContext::b_frame_strategy
Deprecated:
use encoder private options instead

Definition at line 1807 of file avcodec.h.

Referenced by ff_mpv_encode_init(), init_video_param(), X264_init(), and XAVS_init().

float AVCodecContext::b_quant_offset
int AVCodecContext::has_b_frames
attribute_deprecated int AVCodecContext::mpeg_quant
Deprecated:
use encoder private options instead

Definition at line 1828 of file avcodec.h.

Referenced by ff_mpv_encode_init(), and xvid_encode_init().

float AVCodecContext::i_quant_factor

qscale factor between P- and I-frames If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset).

If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).

  • encoding: Set by user.
  • decoding: unused

Definition at line 1838 of file avcodec.h.

Referenced by get_diff_limited_q(), get_qminmax(), get_qscale(), init_video_param(), set_constqp(), set_vbr(), vaapi_encode_h264_configure(), vaapi_encode_h265_configure(), vaapi_encode_mpeg2_configure(), vaapi_encode_vp8_configure(), vaapi_encode_vp9_configure(), X264_init(), and XAVS_init().

float AVCodecContext::i_quant_offset
float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1852 of file avcodec.h.

Referenced by adaptive_quantization(), ff_mpv_encode_init(), and xvid_encode_init().

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1859 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_mpv_encode_init().

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1866 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_mpv_encode_init().

float AVCodecContext::p_masking

p block masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1873 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_mpv_encode_init().

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1880 of file avcodec.h.

Referenced by adaptive_quantization(), and ff_mpv_encode_init().

int AVCodecContext::slice_count

slice count

  • encoding: Set by libavcodec.
  • decoding: Set by user (or 0).

Definition at line 1887 of file avcodec.h.

Referenced by ff_rv34_decode_frame(), get_slice_offset(), rv10_decode_frame(), and update_context_from_user().

attribute_deprecated int AVCodecContext::prediction_method
int* AVCodecContext::slice_offset

slice offsets in the frame in bytes

  • encoding: Set/allocated by libavcodec.
  • decoding: Set/allocated by user (or NULL).

Definition at line 1903 of file avcodec.h.

Referenced by avcodec_copy_context(), ff_frame_thread_free(), get_slice_offset(), and update_context_from_user().

AVRational AVCodecContext::sample_aspect_ratio

sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.

Numerator and denominator must be relatively prime and smaller than 256 for some video standards.

  • encoding: Set by user.
  • decoding: Set by libavcodec.
Examples:
filtering_video.c, transcoding.c, and vaapi_encode.c.

Definition at line 1912 of file avcodec.h.

Referenced by amf_encode_init_h264(), amf_encode_init_hevc(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), compute_dar(), decode_frame(), decode_phys_chunk(), decode_sequence_header_adv(), decode_simple_internal(), decode_studio_vol_header(), decode_vol_header(), dnxhd_decode_header(), dv_write_pack(), encode_aspect_ratio(), encode_frame(), encode_headers(), encode_init(), ff_canopus_parse_info_tag(), ff_decode_frame_props(), ff_flv_decode_picture_header(), ff_h263_decode_frame(), ff_h263_decode_picture_header(), ff_h263_encode_picture_header(), ff_intel_h263_decode_picture_header(), ff_mpv_encode_init(), ff_rv34_decode_frame(), ff_set_sar(), ffmal_update_format(), ffmmal_init_decoder(), gif_read_header1(), h264_init_ps(), init_context_defaults(), init_filter(), init_filters(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), jpeg2000_decode_frame(), jpeg_put_comments(), libkvazaar_init(), libx265_encode_init(), main(), mediacodec_wrap_hw_buffer(), mjpeg_decode_app(), mjpeg_decode_com(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), mpeg_decode_postinit(), new_video_stream(), open_output_file(), pcx_decode_frame(), pcx_encode_frame(), reap_filters(), receive_frame(), reconfig_encoder(), rv20_decode_picture_header(), set_sar(), truemotion1_decode_header(), update_context_from_thread(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_mpeg2_init_sequence_params(), vtenc_create_encoder(), X264_init(), XAVS_init(), and xvid_encode_frame().

int AVCodecContext::me_cmp
int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 1925 of file avcodec.h.

Referenced by config_props(), direct_search(), encode_init(), encode_q_branch(), estimate_best_b_count(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), hpel_motion_search(), and qpel_motion_search().

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1931 of file avcodec.h.

Referenced by check_bidir_mv(), config_props(), direct_search(), encode_q_branch(), estimate_best_b_count(), estimate_motion_b(), ff_estimate_p_frame_motion(), ff_init_me(), h263_mv4_search(), interlaced_search(), and sse_mb().

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 1937 of file avcodec.h.

Referenced by dvvideo_encode_init(), encode_mb_internal(), and ff_mpv_encode_init().

int AVCodecContext::dia_size

ME diamond size & shape.

  • encoding: Set by user.
  • decoding: unused

Definition at line 1961 of file avcodec.h.

Referenced by config_props(), encode_frame(), estimate_motion_thread(), ff_init_me(), iterative_me(), and svq1_encode_plane().

int AVCodecContext::last_predictor_count

amount of previous MV predictors (2a+1 x 2a+1 square)

  • encoding: Set by user.
  • decoding: unused

Definition at line 1968 of file avcodec.h.

Referenced by epzs_motion_search_internal().

attribute_deprecated int AVCodecContext::pre_me
Deprecated:
use encoder private options instead

Definition at line 1973 of file avcodec.h.

Referenced by ff_mpv_encode_init().

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 1981 of file avcodec.h.

Referenced by ff_init_me(), and ff_pre_estimate_p_frame_motion().

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape.

  • encoding: Set by user.
  • decoding: unused

Definition at line 1988 of file avcodec.h.

Referenced by ff_init_me(), and pre_estimate_motion_thread().

int AVCodecContext::me_subpel_quality

subpel ME quality

  • encoding: Set by user.
  • decoding: unused

Definition at line 1995 of file avcodec.h.

Referenced by qpel_motion_search(), X264_init(), and XAVS_init().

int AVCodecContext::me_range

maximum motion estimation search range in subpel units If 0 then no limit.

  • encoding: Set by user.
  • decoding: unused

Definition at line 2004 of file avcodec.h.

Referenced by encode_init(), ff_fix_long_mvs(), ff_fix_long_p_mvs(), ff_get_best_fcode(), get_limits(), mpeg1_encode_sequence_header(), X264_init(), and XAVS_init().

int AVCodecContext::slice_flags

slice flags

  • encoding: unused
  • decoding: Set by user.

Definition at line 2011 of file avcodec.h.

Referenced by ff_draw_horiz_band(), ff_h264_draw_horiz_band(), mpeg_field_start(), and update_context_from_user().

int AVCodecContext::mb_decision
uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix

  • encoding: Set by user, can be NULL.
  • decoding: Set by libavcodec.

Definition at line 2031 of file avcodec.h.

Referenced by avcodec_copy_context(), avcodec_free_context(), copy_context_reset(), encode_picture(), ff_mpv_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

uint16_t* AVCodecContext::inter_matrix

custom inter quantization matrix

  • encoding: Set by user, can be NULL.
  • decoding: Set by libavcodec.

Definition at line 2038 of file avcodec.h.

Referenced by avcodec_copy_context(), avcodec_free_context(), copy_context_reset(), ff_mpv_encode_init(), mpeg1_encode_sequence_header(), mpeg4_encode_vol_header(), new_video_stream(), and xvid_encode_init().

attribute_deprecated int AVCodecContext::scenechange_threshold
Deprecated:
use encoder private options instead

Definition at line 2043 of file avcodec.h.

Referenced by encode_frame(), ff_mpv_encode_init(), X264_init(), and XAVS_init().

attribute_deprecated int AVCodecContext::noise_reduction
Deprecated:
use encoder private options instead

Definition at line 2047 of file avcodec.h.

Referenced by ff_mpv_encode_init(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

  • encoding: Set by user.
  • decoding: Set by libavcodec

Definition at line 2055 of file avcodec.h.

Referenced by ff_mpv_encode_init().

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

  • encoding: unused
  • decoding: Set by user.

Definition at line 2062 of file avcodec.h.

Referenced by ff_er_add_slice(), and ff_er_frame_end().

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

  • encoding: unused
  • decoding: Set by user.

Definition at line 2069 of file avcodec.h.

Referenced by decode_chunks(), and ff_er_frame_end().

int AVCodecContext::mb_lmin

minimum MB Lagrange multiplier

  • encoding: Set by user.
  • decoding: unused

Definition at line 2076 of file avcodec.h.

Referenced by adaptive_quantization(), and encode_init().

int AVCodecContext::mb_lmax

maximum MB Lagrange multiplier

  • encoding: Set by user.
  • decoding: unused

Definition at line 2083 of file avcodec.h.

Referenced by adaptive_quantization(), and encode_init().

attribute_deprecated int AVCodecContext::me_penalty_compensation
Deprecated:
use encoder private options instead

Definition at line 2090 of file avcodec.h.

Referenced by ff_mpv_encode_init().

int AVCodecContext::bidir_refine
  • encoding: Set by user.
  • decoding: unused

Definition at line 2097 of file avcodec.h.

Referenced by bidir_refine().

attribute_deprecated int AVCodecContext::brd_scale
Deprecated:
use encoder private options instead

Definition at line 2102 of file avcodec.h.

Referenced by ff_mpv_encode_init().

int AVCodecContext::keyint_min

minimum GOP size

  • encoding: Set by user.
  • decoding: unused

Definition at line 2110 of file avcodec.h.

Referenced by aom_init(), cinepak_encode_init(), encode_frame(), encode_init(), flashsv2_encode_frame(), vpx_init(), X264_init(), and XAVS_init().

int AVCodecContext::refs
attribute_deprecated int AVCodecContext::chromaoffset
Deprecated:
use encoder private options instead

Definition at line 2122 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

int AVCodecContext::mv0_threshold

Note: Value depends upon the compare function used for fullpel ME.

  • encoding: Set by user.
  • decoding: unused

Definition at line 2130 of file avcodec.h.

Referenced by epzs_motion_search_internal().

attribute_deprecated int AVCodecContext::b_sensitivity
Deprecated:
use encoder private options instead

Definition at line 2135 of file avcodec.h.

Referenced by ff_mpv_encode_init().

enum AVColorPrimaries AVCodecContext::color_primaries
enum AVColorTransferCharacteristic AVCodecContext::color_trc
enum AVColorSpace AVCodecContext::colorspace
enum AVColorRange AVCodecContext::color_range
enum AVChromaLocation AVCodecContext::chroma_sample_location
int AVCodecContext::slices

Number of slices.

Indicates number of picture subdivisions. Used for parallelized decoding.

  • encoding: Set by user
  • decoding: unused

Definition at line 2180 of file avcodec.h.

Referenced by amf_encode_init_h264(), amf_encode_init_hevc(), encode_init(), ff_mpv_common_init(), ff_mpv_encode_init(), init_video_param(), svc_encode_init(), utvideo_encode_init(), vaapi_encode_init_slice_structure(), vpx_init(), and X264_init().

enum AVFieldOrder AVCodecContext::field_order
int AVCodecContext::sample_rate

samples per second

Examples:
demuxing_decoding.c, encode_audio.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 2189 of file avcodec.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), add_stream(), adpcm_encode_init(), adx_encode_header(), adx_encode_init(), alac_decode_init(), alac_encode_init(), amr_decode_fix_avctx(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), apply_param_change(), atrac9_decode_init(), av_get_audio_frame_duration(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), celt_gauge_psy_weight(), cng_decode_init(), create_vorbis_context(), dca_parse(), decode_aiff_header(), decode_audio(), decode_frame(), decode_init(), decode_ppc(), decode_simple_internal(), decode_tag(), decode_wave_header(), do_streamcopy(), dolby_e_decode_frame(), dss_sp_decode_init(), dump_cook_context(), encode_init(), ff_aac_ac3_parse(), ff_aac_search_for_is(), ff_adx_decode_header(), ff_af_queue_add(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_flac_parse_streaminfo(), ff_opus_psy_postencode_update(), ff_psy_preprocess_init(), ff_samples_to_time_base(), ff_wma_init(), ffat_create_decoder(), ffat_decode(), ffat_init_decoder(), ffat_init_encoder(), ffat_update_ctx(), filter_frame_fixed(), filter_frame_float(), flac_encode_init(), flac_parse(), g723_1_encode_init(), get_best_header(), get_bit_rate(), get_rate(), get_stream_info(), gsm_init(), has_codec_parameters(), ilbc_decode_init(), ilbc_encode_init(), imc_decode_init(), init_bitstream_params(), init_encoder(), init_filter(), init_filters(), init_output_frame(), init_output_stream_encode(), init_resampler(), libcelt_dec_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libgsm_decode_init(), libgsm_encode_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), libshine_encode_init(), libspeex_decode_init(), libvorbis_setup(), main(), mark_pns(), metasound_decode_init(), mlp_encode_init(), mlp_parse(), mp3lame_encode_init(), MPA_encode_init(), mpegaudio_parse(), new_audio_stream(), oggvorbis_decode_init(), old_flac_header(), on2avc_decode_init(), open_audio(), open_output_file(), opus_decode_init(), opus_write_extradata(), parse_packet(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), pcm_encode_init(), process_input_packet(), psy_3gpp_init(), psy_output_groups(), qdm2_decode_init(), qdmc_decode_init(), read_frame_internal(), read_major_sync(), read_specific_config(), roq_dpcm_encode_init(), run_test(), s302m_decode_frame(), sbc_encode_init(), sbc_parse_header(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), seek_to_start(), set_sample_rate_params(), set_samplerate(), stream_component_open(), tak_decode_frame(), tta_decode_init(), tta_encode_init(), twinvq_decode_init(), twolame_encode_init(), update_context_from_thread(), validate_options(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), wavesynth_parse_extradata(), wavpack_decode_block(), wavpack_encode_block(), wavpack_encode_init(), wmavoice_decode_init(), and write_audio_frame().

int AVCodecContext::channels

number of audio channels

Examples:
decode_audio.c, demuxing_decoding.c, encode_audio.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 2190 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_decode_init(), aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), ac3_decode_init(), add_stream(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_frame(), adpcm_encode_init(), adpcm_swf_decode(), adx_decode_frame(), adx_decode_init(), adx_encode_frame(), adx_encode_header(), adx_encode_init(), al_decode_frame(), alac_decode_init(), alac_encode_frame(), alac_encode_init(), allocate_buffers(), amr_decode_fix_avctx(), amr_wb_encode_init(), amrnb_decode_init(), amrwb_decode_init(), analyze_sample_buffer(), ape_decode_init(), apply_param_change(), apply_window_and_mdct(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_init(), av_get_audio_frame_duration(), avcodec_encode_audio2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), binkaudio_receive_frame(), bmv_aud_decode_init(), celt_gauge_psy_weight(), celt_search_for_dual_stereo(), celt_search_for_intensity(), celt_search_for_tf(), cinaudio_decode_init(), clear_channel_params(), cng_decode_init(), cng_encode_init(), configure_output_audio_filter(), construct_perm_table(), cook_decode_init(), cook_parse(), copy_restart_frame_params(), create_vorbis_context(), dec_bark_env(), dec_gain(), decode(), decode_block(), decode_end(), decode_extension_payload(), decode_frame(), decode_init(), decode_ppc(), decode_simple_internal(), decoder_init(), dolby_e_decode_frame(), dpcm_decode_frame(), dpcm_decode_init(), dss_sp_decode_init(), dump_cook_context(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_block(), encode_frame(), encode_init(), evrc_decode_init(), fdk_aac_decode_frame(), ff_aac_ac3_parse(), ff_ac3_validate_metadata(), ff_adx_decode_header(), ff_dca_lbr_filter_frame(), ff_dca_set_channel_layout(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_flac_parse_streaminfo(), ff_flac_set_channel_layout(), ff_opus_parse_extradata(), ff_opus_psy_celt_frame_init(), ff_opus_psy_init(), ff_psy_init(), ff_psy_preprocess_end(), ff_psy_preprocess_init(), ff_wma_init(), ffat_create_decoder(), ffat_decode(), ffat_encode(), ffat_encode_callback(), ffat_init_decoder(), ffat_init_encoder(), ffat_update_ctx(), filter_frame_fixed(), filter_frame_float(), flac_encode_init(), frame_configure_elements(), g722_decode_init(), g723_1_decode_init(), g723_1_encode_init(), get_best_header(), get_bit_rate(), get_nb_samples(), get_stream_info(), gsm_init(), guess_input_channel_layout(), has_codec_parameters(), ilbc_decode_init(), ilbc_encode_init(), imc_decode_block(), imc_decode_frame(), imc_decode_init(), imdct_output(), init_bitstream_params(), init_converted_samples(), init_fifo(), init_filter(), init_filters(), init_mdct_win(), init_output_stream_encode(), init_resampler(), input_to_sample_buffer(), lame_window_init(), libcelt_dec_decode(), libcelt_dec_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libgsm_decode_init(), libgsm_encode_init(), libopus_check_max_channels(), libopus_check_vorbis_layout(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libopus_validate_layout_and_get_channel_map(), libopus_write_header(), libshine_encode_init(), libspeex_decode_frame(), libspeex_decode_init(), libvorbis_setup(), mace_decode_frame(), mace_decode_init(), main(), mark_pns(), metasound_decode_init(), metasound_read_bitstream(), mlp_encode_frame(), mlp_encode_init(), mlp_parse(), mp3lame_encode_frame(), mp3lame_encode_init(), MPA_encode_init(), mpc7_decode_init(), mpc8_decode_frame(), mpc8_decode_init(), mpegaudio_parse(), new_audio_stream(), oggvorbis_decode_init(), on2avc_decode_init(), on2avc_decode_subframe(), on2avc_reconstruct_channel_ext(), open_audio(), open_output_file(), opus_decode_packet(), opus_encode_init(), opus_write_extradata(), output_configure(), output_data(), pad_last_frame(), paf_audio_init(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_dvd_decode_samples(), pcm_dvd_parse_header(), pcm_encode_frame(), pcm_encode_init(), pop_output_configuration(), print_enc_params(), psy_3gpp_init(), qcelp_decode_init(), qdm2_decode_init(), qdmc_decode_init(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_and_decode_spectrum(), read_channel_data(), read_diff_float_data(), read_frame_data(), read_frame_internal(), read_header(), read_major_sync(), read_restart_header(), read_specific_config(), reap_filters(), revert_channel_correlation(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), run_test(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), s302m_parse_frame_header(), sbc_encode_init(), sbc_parse_header(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), set_best_codebook(), set_channel_params(), set_major_params(), sipr_decoder_init(), smka_decode_frame(), smka_decode_init(), step_collect_psy_metrics(), stream_component_open(), tak_decode_frame(), truespeech_decode_init(), tta_decode_init(), tta_encode_frame(), tta_encode_init(), twinvq_decode_init(), twinvq_read_bitstream(), twolame_encode_init(), update_context_from_thread(), validate_options(), vmdaudio_decode_frame(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), vorbis_encode_init(), wavesynth_decode(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_encode_block(), wavpack_encode_frame(), wavpack_encode_init(), wma_decode_block(), wma_decode_frame(), wmavoice_decode_init(), write_frame(), ws_snd_decode_init(), and xma_decode_init().

enum AVSampleFormat AVCodecContext::sample_fmt

audio sample format

  • encoding: Set by user.
  • decoding: Set by libavcodec.sample format
Examples:
decode_audio.c, demuxing_decoding.c, encode_audio.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 2197 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_init(), add_stream(), adpcm_decode_init(), adx_decode_init(), alac_decode_init(), alac_encode_init(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), atrac9_decode_init(), avcodec_encode_audio2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), bmv_aud_decode_init(), cinaudio_decode_init(), cng_decode_init(), cook_decode_init(), copy_samples(), decode(), decode_frame(), decode_init(), decode_simple_internal(), decoder_init(), dolby_e_decode_frame(), dpcm_decode_init(), dprint_options(), dss_sp_decode_init(), eightsvx_decode_init(), evrc_decode_init(), fdk_aac_decode_frame(), fdk_aac_decode_init(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_twinvq_decode_init(), ffat_copy_samples(), ffat_create_decoder(), ffat_decode(), ffat_encode_callback(), ffat_init_encoder(), fill_buffer(), filter_frame_fixed(), filter_frame_float(), flac_decode_init(), flac_encode_init(), flac_set_bps(), g722_decode_init(), g723_1_decode_init(), gsm_init(), has_codec_parameters(), ilbc_decode_init(), imc_decode_init(), init_context_defaults(), init_converted_samples(), init_encoder(), init_fifo(), init_filter(), init_filters(), init_offset(), init_output_frame(), init_output_stream_encode(), init_resampler(), init_sample_buffers(), input_data(), libcelt_dec_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libgsm_decode_init(), libopus_decode(), libopus_decode_init(), libopus_encode(), libopus_encode_init(), libspeex_decode_frame(), mace_decode_init(), main(), mlp_encode_init(), mlp_parse(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), oggvorbis_decode_init(), on2avc_decode_init(), open_audio(), open_output_file(), opus_decode_init(), output_data(), pad_last_frame(), paf_audio_init(), parse_streaminfo(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_init(), pcm_dvd_parse_header(), qcelp_decode_init(), qdm2_decode_init(), qdmc_decode_init(), ra144_decode_init(), ra288_decode_init(), read_decoding_params(), read_major_sync(), read_restart_header(), rematrix_channels(), run_test(), s302m_encode_init(), s302m_parse_frame_header(), sbc_parse_header(), set_bps_params(), sipr_decoder_init(), smka_decode_frame(), smka_decode_init(), spawn_empty_frame(), stream_component_open(), tak_decode_frame(), truespeech_decode_init(), tta_decode_init(), tta_encode_frame(), tta_encode_init(), twolame_encode_frame(), update_context_from_thread(), vmdaudio_decode_init(), vorbis_decode_init(), wavesynth_init(), wavpack_decode_block(), wavpack_decode_frame(), wavpack_encode_frame(), wma_decode_init(), wmavoice_decode_init(), write_element(), and ws_snd_decode_init().

int AVCodecContext::frame_size

Number of samples per channel in an audio frame.

  • encoding: set by libavcodec in avcodec_open2(). Each submitted frame except the last must contain exactly frame_size samples per channel. May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the frame size is not restricted.
  • decoding: may be set by some decoders to indicate constant frame size
Examples:
encode_audio.c, muxing.c, and transcode_aac.c.

Definition at line 2209 of file avcodec.h.

Referenced by aac_decode_frame_int(), aac_encode_frame(), aac_encode_init(), adpcm_encode_init(), adx_encode_init(), alac_encode_init(), amr_wb_encode_init(), aptx_init(), av_get_audio_frame_duration(), avcodec_encode_audio2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), celt_apply_preemph_filter(), celt_frame_setup_input(), cng_decode_frame(), cng_decode_init(), cng_encode_init(), configure_filtergraph(), decode_frame(), decoder_init(), do_streamcopy(), dprint_compression_options(), encode_frame(), encode_init(), fdk_aac_decode_frame(), ff_ac3_encode_init(), ff_psy_preprocess(), ffat_create_decoder(), ffat_decode(), ffat_encode(), ffat_init_encoder(), ffat_update_ctx(), flac_encode_init(), flush_encoders(), g722_encode_init(), g723_1_encode_init(), g729_parse(), get_stream_info(), gsm_decode_frame(), gsm_init(), has_codec_parameters(), ilbc_encode_init(), init_output_stream(), libcelt_dec_decode(), libcelt_dec_init(), libcodec2_decode(), libcodec2_init_common(), libgsm_decode_frame(), libgsm_decode_init(), libgsm_encode_init(), libopus_encode_init(), libshine_encode_frame(), libshine_encode_init(), libvorbis_encode_init(), load_encode_and_write(), main(), mlp_encode_frame(), mlp_encode_init(), mp3lame_encode_frame(), mp3lame_encode_init(), mp_decode_frame(), MPA_encode_init(), open_audio(), opus_encode_frame(), opus_encode_init(), pad_last_frame(), pcm_encode_init(), print_enc_params(), process_input_packet(), ra144_encode_frame(), ra144_encode_init(), read_major_sync(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), run_test(), s302m_encode_init(), sbc_encode_init(), sbc_parse_header(), spawn_empty_frame(), tta_encode_init(), twolame_encode_init(), vorbis_encode_frame(), vorbis_encode_init(), wavpack_encode_frame(), and wavpack_encode_init().

int AVCodecContext::frame_number
int AVCodecContext::block_align
int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic")

  • encoding: Set by user.
  • decoding: unused

Definition at line 2233 of file avcodec.h.

Referenced by aac_encode_init(), ff_psy_init(), ff_psy_preprocess_init(), libopus_configure_encoder(), libopus_encode_init(), libvorbis_setup(), mark_pns(), mp3lame_encode_init(), search_for_pns(), search_for_quantizers_twoloop(), and validate_options().

uint64_t AVCodecContext::channel_layout

Audio channel layout.

  • encoding: set by user.
  • decoding: set by user, may be overwritten by libavcodec.
Examples:
encode_audio.c, filtering_audio.c, muxing.c, transcode_aac.c, and transcoding.c.

Definition at line 2240 of file avcodec.h.

Referenced by aac_encode_init(), ac3_decode_frame(), add_stream(), alac_decode_init(), amr_decode_fix_avctx(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), apply_param_change(), atrac3p_decode_init(), atrac9_decode_init(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), bmv_aud_decode_init(), cinaudio_decode_init(), configure_output_audio_filter(), cook_decode_init(), decode_frame(), decode_init(), decode_simple_internal(), dolby_e_decode_frame(), dprint_options(), dss_sp_decode_init(), encode_init(), evrc_decode_init(), ff_aac_ac3_parse(), ff_dca_lbr_filter_frame(), ff_dca_set_channel_layout(), ff_decode_frame_props(), ff_flac_parse_streaminfo(), ff_flac_set_channel_layout(), ff_opus_parse_extradata(), ffat_init_encoder(), ffat_update_ctx(), flac_encode_init(), g722_decode_init(), g723_1_decode_init(), get_best_header(), get_stream_info(), gsm_init(), guess_input_channel_layout(), ilbc_decode_init(), imc_decode_init(), init_decoder(), init_encoder(), init_filter(), init_filters(), init_output_frame(), init_output_stream_encode(), libcodec2_init_decoder(), libgsm_decode_init(), libopus_check_vorbis_layout(), libopus_decode_init(), libspeex_decode_init(), libvorbis_setup(), main(), metasound_decode_init(), mlp_encode_init(), mlp_parse(), mpc7_decode_init(), mpc8_decode_init(), on2avc_decode_init(), open_audio(), open_output_file(), output_configure(), paf_audio_init(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pop_output_configuration(), qcelp_decode_init(), qdm2_decode_init(), qdmc_decode_init(), ra144_decode_init(), ra288_decode_init(), read_frame_internal(), read_major_sync(), read_restart_header(), run_test(), s302m_parse_frame_header(), set_channel_params(), sipr_decoder_init(), smka_decode_init(), spawn_empty_frame(), stream_component_open(), tak_decode_frame(), truespeech_decode_init(), tta_decode_init(), twinvq_decode_init(), update_context_from_thread(), validate_options(), vmdaudio_decode_init(), vorbis_decode_frame(), vorbis_decode_init(), wavpack_decode_block(), wavpack_encode_block(), wavpack_encode_init(), wmavoice_decode_init(), and ws_snd_decode_init().

uint64_t AVCodecContext::request_channel_layout

Request decoder to use this channel layout if it can (0 for default)

  • encoding: unused
  • decoding: Set by user.

Definition at line 2247 of file avcodec.h.

Referenced by ac3_decode_frame(), ac3_decode_init(), dcadec_init(), dolby_e_init(), fdk_aac_decode_init(), ff_dca_set_channel_layout(), filter_frame(), init_decoder(), output_configure(), and read_restart_header().

enum AVAudioServiceType AVCodecContext::audio_service_type

Type of service that the audio stream conveys.

  • encoding: Set by user.
  • decoding: Set by libavcodec.

Definition at line 2254 of file avcodec.h.

Referenced by ac3_decode_frame(), avcodec_encode_audio2(), avformat_find_stream_info(), ff_aac_ac3_parse(), ff_ac3_encode_init(), and ff_ac3_validate_metadata().

enum AVSampleFormat AVCodecContext::request_sample_fmt

desired sample format

  • encoding: Not used.
  • decoding: Set by user. Decoder will decode to this format if it can.

Definition at line 2262 of file avcodec.h.

Referenced by decode_init(), flac_set_bps(), init_decoder(), and libopus_decode_init().

int(* AVCodecContext::get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)

This callback is called at the beginning of each frame to get data buffer(s) for it.

There may be one contiguous buffer for all the data or there may be a buffer per each data plane or anything in between. What this means is, you may set however many entries in buf[] you feel necessary. Each buffer must be reference-counted using the AVBuffer API (see description of buf[] below).

The following fields will be set in the frame before this callback is called:

  • format
  • width, height (video only)
  • sample_rate, channel_layout, nb_samples (audio only) Their values may differ from the corresponding values in AVCodecContext. This callback must use the frame values, not the codec context values, to calculate the required buffer size.

This callback must fill the following fields in the frame:

  • data[]
  • linesize[]
  • extended_data:
    • if the data is planar audio with more than 8 channels, then this callback must allocate and fill extended_data to contain all pointers to all data planes. data[] must hold as many pointers as it can. extended_data must be allocated with av_malloc() and will be freed in av_frame_unref().
    • otherwise extended_data must point to data
  • buf[] must contain one or more pointers to AVBufferRef structures. Each of the frame's data and extended_data pointers must be contained in these. That is, one AVBufferRef for each allocated chunk of memory, not necessarily one AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(), and av_buffer_ref().
  • extended_buf and nb_extended_buf must be allocated with av_malloc() by this callback and filled with the extra buffers if there are more buffers than buf[] can hold. extended_buf will be freed in av_frame_unref().

If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call avcodec_default_get_buffer2() instead of providing buffers allocated by some other means.

Each data plane must be aligned to the maximum required by the target CPU.

See Also
avcodec_default_get_buffer2()

Video:

If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused (read and/or written to if it is writable) later by libavcodec.

avcodec_align_dimensions2() should be used to find the required width and height, as they normally need to be rounded up to the next multiple of 16.

Some decoders do not support linesizes changing between frames.

If frame multithreading is used and thread_safe_callbacks is set, this callback may be called from a different thread, but not from more than one at once. Does not need to be reentrant.

See Also
avcodec_align_dimensions2()

Audio:

Decoders request a buffer of a particular size by setting AVFrame.nb_samples prior to calling get_buffer2(). The decoder may, however, utilize only part of the buffer by setting AVFrame.nb_samples to a smaller value in the output frame.

As a convenience, av_samples_get_buffer_size() and av_samples_fill_arrays() in libavutil may be used by custom get_buffer2() functions to find the required data size and to fill data pointers and linesize. In AVFrame.linesize, only linesize[0] may be set for audio since all planes must be the same size.

See Also
av_samples_get_buffer_size(), av_samples_fill_arrays()
  • encoding: unused
  • decoding: Set by libavcodec, user can override.

Definition at line 2344 of file avcodec.h.

Referenced by get_buffer_internal(), init_context_defaults(), init_input_stream(), submit_packet(), and update_context_from_user().

attribute_deprecated int AVCodecContext::refcounted_frames

If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted and are valid indefinitely.

The caller must free them with av_frame_unref() when they are not needed anymore. Otherwise, the decoded frames must not be freed by the caller and are only valid until the next decode call.

This is always automatically enabled if avcodec_receive_frame() is used.

Definition at line 2360 of file avcodec.h.

Referenced by avcodec_flush_buffers(), compat_decode(), init(), open_stream(), and smvjpeg_decode_init().

float AVCodecContext::qcompress

amount of qscale change between easy & hard scenes (0.0-1.0)

Definition at line 2363 of file avcodec.h.

Referenced by aom_init(), get_qscale(), vpx_init(), X264_init(), and XAVS_init().

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 2364 of file avcodec.h.

Referenced by ff_rate_control_init(), ff_rate_estimate_qscale(), init_pass2(), X264_init(), and XAVS_init().

int AVCodecContext::qmin
int AVCodecContext::qmax
int AVCodecContext::max_qdiff

maximum quantizer difference between frames

  • encoding: Set by user.
  • decoding: unused

Definition at line 2385 of file avcodec.h.

Referenced by get_diff_limited_q(), X264_init(), and XAVS_init().

int AVCodecContext::rc_buffer_size
int AVCodecContext::rc_override_count

ratecontrol override, see RcOverride

  • encoding: Allocated/set/freed by user.
  • decoding: unused

Definition at line 2399 of file avcodec.h.

Referenced by avcodec_copy_context(), get_qscale(), and new_video_stream().

RcOverride* AVCodecContext::rc_override
int64_t AVCodecContext::rc_max_rate
int64_t AVCodecContext::rc_min_rate

minimum bitrate

  • encoding: Set by user.
  • decoding: unused

Definition at line 2414 of file avcodec.h.

Referenced by aom_init(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_vbv_update(), libvorbis_setup(), modify_qscale(), qsv_retrieve_enc_params(), and vpx_init().

float AVCodecContext::rc_max_available_vbv_use

Ratecontrol attempt to use, at maximum, of what can be used without an underflow.

  • encoding: Set by user.
  • decoding: unused.

Definition at line 2421 of file avcodec.h.

Referenced by ff_mpv_encode_picture(), ff_rate_control_init(), and modify_qscale().

float AVCodecContext::rc_min_vbv_overflow_use

Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.

  • encoding: Set by user.
  • decoding: unused.

Definition at line 2428 of file avcodec.h.

Referenced by modify_qscale().

int AVCodecContext::rc_initial_buffer_occupancy

Number of bits which should be loaded into the rc buffer before decoding starts.

  • encoding: Set by user.
  • decoding: unused

Definition at line 2435 of file avcodec.h.

Referenced by amf_encode_init_h264(), amf_encode_init_hevc(), aom_init(), avcodec_open2(), ff_rate_control_init(), init_video_param(), libx265_encode_init(), vaapi_encode_init_rate_control(), vpx_init(), X264_init(), and XAVS_init().

attribute_deprecated int AVCodecContext::coder_type
Deprecated:
use encoder private options instead

Definition at line 2446 of file avcodec.h.

Referenced by encode_frame(), encode_init(), init_video_param(), sunrast_encode_init(), svc_encode_init(), targa_encode_frame(), and X264_init().

attribute_deprecated int AVCodecContext::context_model
Deprecated:
use encoder private options instead

Definition at line 2452 of file avcodec.h.

Referenced by encode_init().

attribute_deprecated int AVCodecContext::frame_skip_threshold
Deprecated:
use encoder private options instead

Definition at line 2458 of file avcodec.h.

Referenced by ff_mpv_encode_init(), and vpx_init().

attribute_deprecated int AVCodecContext::frame_skip_factor
Deprecated:
use encoder private options instead

Definition at line 2462 of file avcodec.h.

Referenced by ff_mpv_encode_init().

attribute_deprecated int AVCodecContext::frame_skip_exp
Deprecated:
use encoder private options instead

Definition at line 2466 of file avcodec.h.

Referenced by ff_mpv_encode_init().

attribute_deprecated int AVCodecContext::frame_skip_cmp
Deprecated:
use encoder private options instead

Definition at line 2470 of file avcodec.h.

Referenced by ff_mpv_encode_init().

int AVCodecContext::trellis
attribute_deprecated int AVCodecContext::min_prediction_order
Deprecated:
use encoder private options instead

Definition at line 2483 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

attribute_deprecated int AVCodecContext::max_prediction_order
Deprecated:
use encoder private options instead

Definition at line 2487 of file avcodec.h.

Referenced by alac_encode_init(), and flac_encode_init().

attribute_deprecated int64_t AVCodecContext::timecode_frame_start
Deprecated:
use encoder private options instead

Definition at line 2491 of file avcodec.h.

Referenced by encode_init(), mpeg_decode_gop(), and show_stream().

attribute_deprecated void(* AVCodecContext::rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
Deprecated:
unused

Definition at line 2505 of file avcodec.h.

Referenced by encode_thread().

attribute_deprecated int AVCodecContext::rtp_payload_size
Deprecated:
use encoder private options instead

Definition at line 2511 of file avcodec.h.

Referenced by ff_mpv_encode_init().

attribute_deprecated int AVCodecContext::mv_bits

Definition at line 2522 of file avcodec.h.

Referenced by encode_frame(), and ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::header_bits

Definition at line 2524 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::i_tex_bits

Definition at line 2526 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::p_tex_bits

Definition at line 2528 of file avcodec.h.

Referenced by encode_frame(), and ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::i_count

Definition at line 2530 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::p_count

Definition at line 2532 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::skip_count

Definition at line 2534 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::misc_bits

Definition at line 2536 of file avcodec.h.

Referenced by encode_frame(), and ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::frame_bits
Deprecated:
this field is unused

Definition at line 2540 of file avcodec.h.

Referenced by encode_frame(), and ff_mpv_encode_picture().

char* AVCodecContext::stats_out
char* AVCodecContext::stats_in

pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed here.

  • encoding: Allocated/set/freed by user.
  • decoding: unused

Definition at line 2556 of file avcodec.h.

Referenced by aom_init(), encode_init(), ff_rate_control_init(), new_video_stream(), submit_stats(), transcode(), vpx_init(), and xvid_encode_init().

int AVCodecContext::workaround_bugs

Work around bugs in encoders which sometimes cannot be detected automatically.

  • encoding: Set by user
  • decoding: Set by user

Definition at line 2563 of file avcodec.h.

Referenced by ff_mpeg4_set_direct_mv(), ff_mpv_decode_init(), and h264_init_context().

int AVCodecContext::strict_std_compliance

strictly follow the standard (MPEG-4, ...).

  • encoding: Set by user.
  • decoding: Set by user. Setting this to STRICT or higher means the encoder and decoder will generally do stupid things, whereas setting it to unofficial or lower will mean the encoder might produce output that is not supported by all spec-compliant decoders. Decoders don't differentiate between normal, unofficial and experimental (that is, they always try to decode things when they can) unless they are explicitly asked to behave stupidly (=strictly conform to the specs)
Examples:
transcode_aac.c.

Definition at line 2592 of file avcodec.h.

Referenced by aac_encode_init(), amr_wb_encode_init(), avcodec_open2(), choose_pix_fmts(), choose_pixel_fmt(), config_input(), config_props(), decode_frame_common(), decode_header(), dvbsub_parse_clut_segment(), encode_frame(), encode_init(), ff_dnxhd_find_cid(), ff_fix_long_p_mvs(), ff_get_best_fcode(), ff_h264_decode_seq_parameter_set(), ff_mpv_encode_init(), find_frame_rate_index(), h264_select_output_frame(), hwaccel_init(), init_video_param(), libgsm_encode_init(), ljpeg_encode_init(), open_output_file(), set_default_channel_config(), and vc2_encode_init().

int AVCodecContext::error_concealment

error concealment flags

  • encoding: unused
  • decoding: Set by user.

Definition at line 2604 of file avcodec.h.

Referenced by dv_decode_video_segment(), ff_er_add_slice(), ff_er_frame_end(), ff_er_frame_start(), ff_vp56_decode_mbs(), guess_mv(), is_intra_more_likely(), and LLVMFuzzerTestOneInput().

int AVCodecContext::debug

debug

  • encoding: Set by user.
  • decoding: Set by user.

Definition at line 2614 of file avcodec.h.

Referenced by aac_decode_frame_int(), audio_get_buffer(), check_keyboard_interaction(), dct_init(), decode_chunks(), decode_ext_header(), decode_extension_payload(), decode_fill(), decode_frame(), decode_frame_common(), decode_ihdr_chunk(), decode_init(), decode_nal_units(), dvbsub_decode(), ff_er_frame_end(), ff_flv_decode_picture_header(), ff_frame_thread_init(), ff_h263_show_pict_info(), ff_h264_decode_picture_parameter_set(), ff_h264_decode_seq_parameter_set(), ff_h264_execute_ref_pic_marking(), ff_hevc_decode_nal_sps(), ff_jpegls_decode_lse(), ff_jpegls_decode_picture(), ff_mjpeg_decode_frame(), ff_mjpeg_decode_sos(), ff_mpeg4_decode_picture_header(), ff_mpeg4_workaround_bugs(), ff_mpv_frame_start(), ff_msmpeg4_decode_picture_header(), ff_print_debug_info2(), ff_rate_estimate_qscale(), ff_thread_release_buffer(), ff_vbv_update(), ff_wmv2_decode_secondary_picture_header(), find_short(), h264_slice_init(), mjpeg_decode_app(), mjpeg_decode_com(), mjpegb_decode_frame(), modify_qscale(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg_decode_gop(), mpeg_decode_picture_display_extension(), mpeg_decode_sequence_display_extension(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), mpv_reconstruct_mb_internal(), parse_avid(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_dvd_parse_header(), predict_slice(), predict_slice_buffered(), print_long_term(), print_short_term(), read_extra_header(), remove_short(), rv10_decode_init(), rv20_decode_picture_header(), submit_packet(), svq3_decode_frame(), truemotion1_decode_header(), update_context_from_user(), vc1_decode_frame(), and video_get_buffer().

int AVCodecContext::err_recognition

Error recognition; may misdetect some more or less valid parts as errors.

  • encoding: unused
  • decoding: Set by user.

Definition at line 2658 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_frame(), apply_param_change(), dcadec_decode_frame(), decode(), decode_chunks(), decode_frame(), decode_ics_info(), decode_init(), decode_nal_unit(), decode_nal_units(), decode_region_inter(), decode_region_masked(), decode_rle(), decode_slice(), display_end_segment(), ff_ccitt_unpack(), ff_dca_check_crc(), ff_dca_core_parse(), ff_dca_core_parse_exss(), ff_dca_lbr_parse(), ff_er_frame_end(), ff_h263_decode_frame(), ff_h264_execute_ref_pic_marking(), ff_h264_queue_decode_slice(), ff_hevc_decode_nal_vps(), ff_hevc_parse_sps(), ff_mjpeg_decode_frame(), ff_mpeg4_pred_dc(), ff_msmpeg4_decode_block(), flac_decode_frame(), get_last_needed_nal(), h261_decode_gob_header(), h263_decode_block(), h264_decode_frame(), h264_decode_init(), h264_field_start(), h264_parse(), h264_slice_header_parse(), hevc_decode_extradata(), hevc_decode_frame(), hevc_parse(), hls_slice_header(), mjpegb_decode_frame(), mpeg1_decode_picture(), mpeg1_decode_sequence(), mpeg4_decode_block(), mpeg4_decode_dc(), mpeg4_decode_mb(), mpeg_decode_frame(), mpeg_decode_slice(), mxpeg_decode_frame(), opus_decode_frame(), opus_decode_subpacket(), parse_audio(), parse_band_data(), parse_optional_info(), parse_presentation_segment(), pcx_decode_frame(), read_specific_config(), slice_decode_thread(), tak_decode_frame(), tdsc_decode_jpeg_tile(), tdsc_parse_dtsm(), tiff_decode_tag(), tta_decode_frame(), v410_decode_init(), vc1_decode_frame(), wavpack_decode_block(), wv_unpack_mono(), and wv_unpack_stereo().

int64_t AVCodecContext::reordered_opaque

opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame.reordered_opaque

  • encoding: unused
  • decoding: Set by user.

Definition at line 2683 of file avcodec.h.

Referenced by ff_decode_frame_props(), init_context_defaults(), and update_context_from_user().

const struct AVHWAccel* AVCodecContext::hwaccel
void* AVCodecContext::hwaccel_context

Hardware accelerator context.

For some hardware accelerators, a global context needs to be provided by the user. In that case, this holds display-dependent data FFmpeg cannot instantiate itself. Please refer to the FFmpeg HW accelerator documentation to know how to fill this is. e.g. for VA API, this is a struct vaapi_context.

  • encoding: unused
  • decoding: Set by user

Definition at line 2702 of file avcodec.h.

Referenced by av_vdpau_bind_context(), ff_dxva2_decode_init(), ff_mediacodec_dec_init(), ff_qsv_enc_init(), ff_vaapi_decode_init(), ff_vdpau_common_end_frame(), ff_vdpau_common_init(), ff_vdpau_common_reinit(), qsv_decode_init(), qsv_init_opaque_alloc(), qsvenc_init_session(), and update_context_from_thread().

uint64_t AVCodecContext::error[AV_NUM_DATA_POINTERS]

error

  • encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR.
  • decoding: unused

Definition at line 2709 of file avcodec.h.

Referenced by encode_frame(), estimate_best_b_count(), ff_mpv_encode_picture(), print_report(), and storeframe().

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below.

  • encoding: Set by user.
  • decoding: unused

Definition at line 2716 of file avcodec.h.

Referenced by avcodec_dct_init(), ff_dct_encode_init_x86(), ff_fdctdsp_init(), ff_fdctdsp_init_ppc(), ff_fdctdsp_init_x86(), ff_mpv_common_init_ppc(), and tdsc_init().

int AVCodecContext::idct_algo
int AVCodecContext::bits_per_coded_sample
int AVCodecContext::bits_per_raw_sample

Bits per sample/pixel of internal libavcodec pixel/sample format.

  • encoding: set by user.
  • decoding: set by libavcodec.

Definition at line 2757 of file avcodec.h.

Referenced by alac_decode_init(), alac_encode_frame(), alac_encode_init(), avcodec_dct_init(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), cfhd_init(), checkasm_check_pixblockdsp(), cllc_decode_frame(), copy_samples(), dct_init(), decode_channel(), decode_frame(), decode_init(), decode_plane(), decode_studio_vol_header(), dnxhd_decode_header(), dnxhd_encode_init(), encode_init(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_fdctdsp_init(), ff_flac_parse_streaminfo(), ff_idctdsp_init(), ff_idctdsp_init_x86(), ff_init_block_index(), ff_jpegls_decode_lse(), ff_mjpeg_decode_sof(), ff_mpeg4_decode_picture_header(), ff_mpegvideoencdsp_init_x86(), ff_mpv_encode_init(), ff_pixblockdsp_init(), ff_update_block_index(), ff_xvid_idct_init(), ffat_create_decoder(), ffat_init_encoder(), fic_decode_init(), fill_buffer(), filter_frame_fixed(), filter_frame_float(), flac_encode_frame(), flac_encode_init(), get_siz(), h263_get_format(), h264_slice_header_init(), hq_decode_frame(), hqa_decode_frame(), hqx_decode_frame(), init_frame(), init_output_stream_encode(), init_sample_buffers(), libopenjpeg_decode_frame(), mlp_encode_init(), mlp_parse(), mpeg4_decode_dpcm_macroblock(), mpeg4_decode_studio_block(), mpv_reconstruct_mb_internal(), new_video_stream(), pcm_bluray_parse_header(), pcm_decode_init(), pcm_dvd_parse_header(), pnm_decode_frame(), prores_encode_init(), read_const_block_data(), read_extra_header(), read_header(), read_major_sync(), read_var_block_data(), reset_studio_dc_predictors(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), s302m_parse_frame_header(), set_bps_params(), show_stream(), svq3_decode_init(), tak_decode_frame(), tak_decode_init(), tta_decode_init(), tta_encode_init(), update_context_from_thread(), update_md5_sum(), v410_decode_init(), vble_decode_init(), wavpack_decode_frame(), wavpack_encode_frame(), write_element(), write_streaminfo(), y216_decode_init(), y41p_decode_init(), zero12v_decode_init(), and zerocodec_decode_init().

int AVCodecContext::lowres
attribute_deprecated AVFrame* AVCodecContext::coded_frame
int AVCodecContext::thread_count
int AVCodecContext::thread_type

Which multithreading methods to use.

Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread, so clients which cannot provide future frames should not use it.

  • encoding: Set by user, otherwise the default is used.
  • decoding: Set by user, otherwise the default is used.

Definition at line 2795 of file avcodec.h.

Referenced by ff_frame_thread_encoder_init(), main(), validate_thread_parameters(), and X264_init().

int AVCodecContext::active_thread_type
int AVCodecContext::thread_safe_callbacks

Set by the client if its custom get_buffer() callback can be called synchronously from another thread, which allows faster multithreaded decoding.

draw_horiz_band() will be called from other threads regardless of this setting. Ignored if the default get_buffer() is used.

  • encoding: Set by user.
  • decoding: Set by user.

Definition at line 2814 of file avcodec.h.

Referenced by ff_thread_get_format(), init_input_stream(), submit_packet(), and update_context_from_user().

int(* AVCodecContext::execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially.

Parameters
countthe number of things to execute
  • encoding: Set by libavcodec, user can override.
  • decoding: Set by libavcodec, user can override.

Definition at line 2825 of file avcodec.h.

Referenced by calc_slice_sizes(), decode_chunks(), decode_component(), decode_frame(), decode_lowdelay(), dvvideo_decode_frame(), dvvideo_encode_frame(), encode_frame(), encode_picture(), encode_slices(), ff_h264_execute_decode_slices(), ff_slice_thread_init(), fic_decode_frame(), hls_slice_data(), and init_context_defaults().

int(* AVCodecContext::execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)

The codec may call this to execute several independent things.

It will return only after finishing all tasks. The user may replace this with some multithreaded implementation, the default implementation will execute the parts serially. Also see avcodec_thread_init and e.g. the –enable-pthread configure option.

Parameters
ccontext passed also to func
countthe number of things to execute
arg2argument passed unchanged to func
retreturn values of executed functions, must have space for "count" values. May be NULL.
funcfunction that will be called count times, with jobnr from 0 to count-1. threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no two instances of func executing at the same time will have the same threadnr.
Returns
always 0 currently, but code should handle a future improvement where when any call to func returns < 0 no further calls to func may be done and < 0 is returned.
  • encoding: Set by libavcodec, user can override.
  • decoding: Set by libavcodec, user can override.

Definition at line 2845 of file avcodec.h.

Referenced by dds_decode(), decode_frame(), decode_lowdelay(), decode_picture(), dnxhd_decode_frame(), dnxhd_encode_fast(), dnxhd_encode_picture(), dnxhd_encode_rdo(), dnxhd_find_qscale(), dxv_decode(), encode_frame(), ff_slice_thread_init(), ff_vp56_decode_frame(), hap_decode(), hls_slice_data_wpp(), hqx_decode_frame(), init_context_defaults(), jpeg2000_decode_frame(), magy_decode_frame(), and vp78_decode_frame().

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 2852 of file avcodec.h.

Referenced by hadamard_func(), nsse16_c(), and nsse8_c().

int AVCodecContext::profile

profile

  • encoding: Set by user.
  • decoding: Set by libavcodec.

Definition at line 2859 of file avcodec.h.

Referenced by aac_decode_er_frame(), aac_decode_frame_int(), aac_encode_init(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_init(), av1_parser_parse(), av_vdpau_get_profile(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), dca_parse(), decode_extension_payload(), decode_frame_header(), decode_vol_header(), dirac_decode_data_unit(), dnxhd_decode_header(), dnxhd_encode_init(), dnxhd_find_hr_cid(), dxva_check_codec_compatibility(), encode_init(), encode_slice(), export_stream_params(), ff_AMediaCodecProfile_getProfileFromAVCodecContext(), ff_dca_core_filter_frame(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_dnxhd_find_cid(), ff_mjpeg_decode_frame(), ff_mpeg4_decode_picture_header(), ff_qsv_process_data(), ffat_create_decoder(), ffat_init_encoder(), get_siz(), h264_init_ps(), hevc_parse_slice_header(), mpeg1_encode_sequence_header(), mpeg4_encode_visual_object_header(), mpeg_decode_sequence_extension(), mpeg_decode_slice(), nvenc_setup_h264_config(), nvenc_setup_hevc_config(), omx_component_init(), parse(), parse_nal_units(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), put_pce(), qsv_decode_init(), read_colorspace_details(), read_sbr_extension(), sbc_encode_init(), set_pix_fmt(), svc_decode_frame(), update_context_from_thread(), v4l2_prepare_encoder(), vaapi_decode_make_config(), vaapi_encode_h264_init(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_mpeg2_init(), vaapi_encode_profile_entrypoint(), vc1_decode_init(), vdpau_h264_init(), vdpau_hevc_init(), vdpau_mpeg4_init(), vdpau_vc1_init(), vpx_init(), and X264_init().

int AVCodecContext::level
enum AVDiscard AVCodecContext::skip_loop_filter

Skip loop filtering for selected frames.

  • encoding: unused
  • decoding: Set by user.

Definition at line 2977 of file avcodec.h.

Referenced by decode_wmv9(), ff_hevc_hls_filter(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), h264_slice_init(), vc1_decode_p_blocks(), and vp78_decode_frame().

enum AVDiscard AVCodecContext::skip_idct

Skip IDCT/dequantization for selected frames.

  • encoding: unused
  • decoding: Set by user.

Definition at line 2984 of file avcodec.h.

Referenced by mpv_reconstruct_mb_internal().

enum AVDiscard AVCodecContext::skip_frame
uint8_t* AVCodecContext::subtitle_header

Header containing style information for text subtitles.

For SUBTITLE_ASS subtitle type, it should contain the whole ASS [Script Info] and [V4+ Styles] section, plus the [Events] line and the Format line following. It shouldn't include any Dialogue line.

Definition at line 3001 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_copy_context(), avcodec_free_context(), avcodec_open2(), avformat_find_stream_info(), copy_context_reset(), ff_ass_subtitle_header(), init_output_stream(), mov_text_encode_init(), my_ass_subtitle_header(), srt_encode_init(), and webvtt_encode_init().

int AVCodecContext::subtitle_header_size
attribute_deprecated uint64_t AVCodecContext::vbv_delay

VBV delay coded in the last frame (in periods of a 27 MHz clock).

Used for compliant TS muxing.

  • encoding: Set by libavcodec.
  • decoding: unused.
    Deprecated:
    this value is now exported as a part of AV_PKT_DATA_CPB_PROPERTIES packet side data

Definition at line 3014 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

attribute_deprecated int AVCodecContext::side_data_only_packets

Encoding only and set by default.

Allow encoders to output packets that do not contain any encoded data, only side data.

Some encoders need to output such packets, e.g. to update some stream parameters at the end of encoding.

Deprecated:
this field disables the default behaviour and it is kept only for compatibility.

Definition at line 3029 of file avcodec.h.

Referenced by flac_encode_frame().

int AVCodecContext::initial_padding

Audio only.

The number of "priming" samples (padding) inserted by the encoder at the beginning of the audio. I.e. this number of leading decoded samples must be discarded by the caller to get the original audio without leading padding.

  • decoding: unused
  • encoding: Set by libavcodec. The timestamps on the output packets are adjusted by the encoder so that they always refer to the first sample of the data actually contained in the packet, including any added padding. E.g. if the timebase is 1/samplerate and the timestamp of the first input sample is 0, the timestamp of the first output packet will be -initial_padding.

Definition at line 3047 of file avcodec.h.

Referenced by aac_encode_init(), amr_wb_encode_frame(), amr_wb_encode_init(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), encode_frame(), encode_init(), encode_superframe(), ff_ac3_encode_init(), ff_af_queue_init(), ffat_update_ctx(), g722_encode_frame(), g722_encode_init(), libopus_encode_init(), libopus_write_header(), libvorbis_encode_frame(), mp3lame_encode_frame(), mp3lame_encode_init(), MPA_encode_frame(), MPA_encode_init(), opus_encode_init(), opus_write_extradata(), ra144_encode_init(), twolame_encode_frame(), and twolame_encode_init().

AVRational AVCodecContext::framerate
  • decoding: For codecs that store a framerate value in the compressed bitstream, the decoder may export it here. { 0, 1} when unknown.
  • encoding: May be used to signal the framerate of CFR content to an encoder.
Examples:
encode_video.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 3056 of file avcodec.h.

Referenced by add_input_streams(), amf_encode_init_h264(), amf_encode_init_hevc(), av_guess_frame_rate(), avcodec_open2(), avformat_find_stream_info(), cmv_process_header(), cuvid_output_frame(), davs2_dump_frames(), dec_enc(), decode_frame(), decode_seq_header(), decode_sequence_header_adv(), decode_vol_header(), decode_vop_header(), dirac_decode_data_unit(), dvvideo_decode_frame(), export_stream_params(), ff_compute_frame_duration(), ff_guess_coded_bitrate(), ff_h263_decode_picture_header(), ff_h263_show_pict_info(), ff_raw_video_read_header(), ffmal_update_format(), h261_decode_picture_header(), h264_export_frame_props(), h264_parse(), h264_slice_header_init(), hevc_parse_slice_header(), init_context_defaults(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), main(), mpegvideo_extract_headers(), mpegvideo_parse(), omx_component_init(), open_input_file(), open_output_file(), process_input_packet(), tgq_decode_init(), tgv_decode_init(), tqi_decode_init(), update_context_from_thread(), v4l2_prepare_encoder(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_rate_control(), vaapi_mpeg4_start_frame(), vc1_extract_header(), vdpau_mpeg4_start_frame(), and xavs2_init().

enum AVPixelFormat AVCodecContext::sw_pix_fmt
AVRational AVCodecContext::pkt_timebase
const AVCodecDescriptor* AVCodecContext::codec_descriptor

AVCodecDescriptor.

  • encoding: unused.
  • decoding: set by libavcodec.

Definition at line 3077 of file avcodec.h.

Referenced by avcodec_decode_subtitle2(), avcodec_open2(), and update_context_from_thread().

int64_t AVCodecContext::pts_correction_num_faulty_pts

Current statistics for PTS correction.

  • decoding: maintained and used by libavcodec, not intended to be used by user apps
  • encoding: unused

Definition at line 3093 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_num_faulty_dts

Number of incorrect PTS values so far.

Definition at line 3094 of file avcodec.h.

Referenced by avcodec_open2(), guess_correct_pts(), and video_refresh().

int64_t AVCodecContext::pts_correction_last_pts

Number of incorrect DTS values so far.

Definition at line 3095 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

int64_t AVCodecContext::pts_correction_last_dts

PTS of the last frame.

Definition at line 3096 of file avcodec.h.

Referenced by avcodec_flush_buffers(), avcodec_open2(), and guess_correct_pts().

char* AVCodecContext::sub_charenc

DTS of the last frame.

Character encoding of the input subtitles file.

  • decoding: set by user
  • encoding: unused

Definition at line 3103 of file avcodec.h.

Referenced by avcodec_open2(), and recode_subtitle().

int AVCodecContext::sub_charenc_mode

Subtitles character encoding mode.

Formats or codecs might be adjusting this setting (if they are doing the conversion themselves for instance).

  • decoding: set by libavcodec
  • encoding: unused

Definition at line 3111 of file avcodec.h.

Referenced by avcodec_decode_subtitle2(), avcodec_open2(), and recode_subtitle().

int AVCodecContext::skip_alpha

Skip processing alpha if supported by codec.

Note that if the format uses pre-multiplied alpha (common with VP6, and recommended due to better video quality/compression) the image will look as if alpha-blended onto a black background. However for formats that do not use pre-multiplied alpha there might be serious artefacts (though e.g. libswscale currently assumes pre-multiplied alpha anyway).

  • decoding: set by user
  • encoding: unused

Definition at line 3129 of file avcodec.h.

Referenced by decode_frame_header(), ff_vp56_init_context(), and read_header().

int AVCodecContext::seek_preroll

Number of samples to skip after a discontinuity.

  • decoding: unused
  • encoding: set by libavcodec

Definition at line 3136 of file avcodec.h.

Referenced by avcodec_parameters_from_context(), and avcodec_parameters_to_context().

int AVCodecContext::debug_mv

debug motion vectors

  • encoding: Set by user.
  • decoding: Set by user.

Definition at line 3144 of file avcodec.h.

Referenced by alloc_picture_tables(), ff_frame_thread_init(), ff_print_debug_info2(), and update_context_from_user().

uint16_t* AVCodecContext::chroma_intra_matrix

custom intra quantization matrix

  • encoding: Set by user, can be NULL.
  • decoding: unused.

Definition at line 3155 of file avcodec.h.

Referenced by encode_picture(), and new_video_stream().

uint8_t* AVCodecContext::dump_separator

dump format separator.

can be ", " or "\n " or anything else

  • encoding: Set by user.
  • decoding: Set by user.

Definition at line 3163 of file avcodec.h.

Referenced by avcodec_string().

char* AVCodecContext::codec_whitelist

',' separated list of allowed decoders.

If NULL then all are allowed

  • encoding: unused
  • decoding: set by user

Definition at line 3171 of file avcodec.h.

Referenced by avcodec_open2().

unsigned AVCodecContext::properties

Properties of the stream that gets decoded.

  • encoding: unused
  • decoding: set by libavcodec

Definition at line 3178 of file avcodec.h.

Referenced by avcodec_string(), avformat_find_stream_info(), decode_frame_header(), dump_stream_format(), ff_mjpeg_decode_frame(), get_cox(), h264_export_frame_props(), mpeg_decode_a53_cc(), set_side_data(), and webp_decode_frame().

AVPacketSideData* AVCodecContext::coded_side_data

Additional data associated with the entire coded stream.

  • decoding: unused
  • encoding: may be set by libavcodec after avcodec_open2().

Definition at line 3188 of file avcodec.h.

Referenced by avcodec_close(), avcodec_copy_context(), copy_context_reset(), ff_add_cpb_side_data(), and init_output_stream().

int AVCodecContext::nb_coded_side_data
AVBufferRef* AVCodecContext::hw_frames_ctx

A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.

The reference is set by the caller and afterwards owned (and freed) by libavcodec - it should never be read by the caller after being set.

Examples:
qsvdec.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 3213 of file avcodec.h.

Referenced by amf_init_context(), avcodec_close(), avcodec_copy_context(), avcodec_default_get_buffer2(), avcodec_open2(), copy_context_reset(), cuvid_decode_init(), dec_enc(), ff_decode_get_hw_frames_ctx(), ff_dxva2_decode_init(), ff_frame_thread_free(), ff_get_format(), ff_nvdec_decode_init(), ff_nvenc_encode_init(), ff_qsv_enc_init(), ff_vaapi_decode_init(), ff_vaapi_encode_init(), ff_vdpau_common_init(), get_format(), hwaccel_uninit(), init_output_stream(), init_video_param(), init_video_param_jpeg(), main(), nvenc_setup_device(), qsv_decode_init(), qsvenc_init_session(), set_hwframe_ctx(), and update_context_from_thread().

int AVCodecContext::sub_text_format

Control the form of AVSubtitle.rects[N]->ass.

  • decoding: set by user
  • encoding: unused

Definition at line 3220 of file avcodec.h.

Referenced by avcodec_decode_subtitle2().

int AVCodecContext::trailing_padding

Audio only.

The amount of padding (in samples) appended by the encoder to the end of the audio. I.e. this number of decoded samples must be discarded by the caller from the end of the stream to get the original audio without any trailing padding.

  • decoding: unused
  • encoding: unused

Definition at line 3235 of file avcodec.h.

Referenced by avcodec_parameters_from_context(), avcodec_parameters_to_context(), and avcodec_string().

int64_t AVCodecContext::max_pixels
AVBufferRef* AVCodecContext::hw_device_ctx

A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/decoder.

The reference is set by the caller and afterwards owned (and freed) by libavcodec.

This should be used if either the codec device does not require hardware frames or any that are used are to be allocated internally by libavcodec. If the user wishes to supply any of the frames used as encoder input or decoder output then hw_frames_ctx should be used instead. When hw_frames_ctx is set in get_format() for a decoder, this field will be ignored while decoding the associated stream segment, but may again be used on a following one after another get_format() call.

For both encoders and decoders this field should be set before avcodec_open2() is called and must not be written to thereafter.

Note that some decoders may require this field to be set initially in order to support hw_frames_ctx at all - in that case, all frames contexts used must be created on the same device.

Examples:
hw_decode.c, and vaapi_transcode.c.

Definition at line 3265 of file avcodec.h.

Referenced by amf_init_context(), avcodec_close(), avcodec_copy_context(), avcodec_default_get_format(), copy_context_reset(), cuvid_decode_init(), ff_decode_get_hw_frames_ctx(), ff_get_format(), ff_mediacodec_dec_init(), hw_decoder_init(), hw_device_setup_for_decode(), hw_device_setup_for_encode(), nvenc_setup_device(), open_input_file(), qsv_decode_init(), and qsvenc_init_session().

int AVCodecContext::hwaccel_flags

Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated decoding (if active).

Definition at line 3274 of file avcodec.h.

Referenced by dxva_check_codec_compatibility(), ff_vdpau_common_init(), update_context_from_thread(), and vaapi_decode_make_config().

int AVCodecContext::apply_cropping

Video decoding only.

Certain video codecs support cropping, meaning that only a sub-rectangle of the decoded frame is intended for display. This option controls how cropping is handled by libavcodec.

When set to 1 (the default), libavcodec will apply cropping internally. I.e. it will modify the output frame width/height fields and offset the data pointers (only by as much as possible while preserving alignment, or by the full amount if the AV_CODEC_FLAG_UNALIGNED flag is set) so that the frames output by the decoder refer only to the cropped area. The crop_* fields of the output frames will be zero.

When set to 0, the width/height fields of the output frames will be set to the coded dimensions and the crop_* fields will describe the cropping rectangle. Applying the cropping is left to the caller.

Warning
When hardware acceleration with opaque output frames is used, libavcodec is unable to apply cropping from the top/left border.
Note
when this option is set to zero, the width/height fields of the AVCodecContext and output AVFrames have different meanings. The codec context fields store display dimensions (with the coded dimensions in coded_width/height), while the frame fields store the coded dimensions (with the display dimensions being determined by the crop_* fields).

Definition at line 3301 of file avcodec.h.

Referenced by apply_cropping().

int AVCodecContext::extra_hw_frames

Definition at line 3315 of file avcodec.h.

Referenced by avcodec_get_hw_frames_parameters(), and qsv_init().


The documentation for this struct was generated from the following file: