FFmpeg
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...
 
void * priv_data
 
struct AVCodecInternalinternal
 Private context used for internal data. More...
 
void * opaque
 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_t * extradata
 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 pixel format. 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...
 
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...
 
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...
 
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...
 
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 Must be allocated with the av_malloc() family of functions, and will be freed in avcodec_free_context(). More...
 
uint16_t * inter_matrix
 custom inter quantization matrix Must be allocated with the av_malloc() family of functions, and will be freed in avcodec_free_context(). More...
 
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...
 
int bidir_refine
 
int keyint_min
 minimum GOP size More...
 
int refs
 number of reference frames More...
 
int mv0_threshold
 Note: Value depends upon the compare function used for fullpel ME. More...
 
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...
 
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...
 
int trellis
 trellis RD quantization More...
 
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...
 
void * hwaccel_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...
 
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...
 
attribute_deprecated 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_t * subtitle_header
 Header containing style information for text subtitles. More...
 
int subtitle_header_size
 
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...
 
attribute_deprecated int debug_mv
 
uint16_t * chroma_intra_matrix
 custom intra quantization matrix More...
 
uint8_t * dump_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...
 
attribute_deprecated int sub_text_format
 
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
 
int discard_damaged_percentage
 The percentage of damaged samples to discard a frame. More...
 
int64_t max_samples
 The number of samples per frame to maximally accept. More...
 
int export_side_data
 Bit set of AV_CODEC_EXPORT_DATA_* flags, which affects the kind of metadata exported in frame, packet, or coded stream side data by decoders and encoders. More...
 
int(* get_encode_buffer )(struct AVCodecContext *s, AVPacket *pkt, int flags)
 This callback is called at the beginning of each packet to get a data buffer for it. More...
 

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 383 of file avcodec.h.

Field Documentation

◆ av_class

const AVClass* AVCodecContext::av_class

information on struct for av_log

  • set by avcodec_alloc_context3

Definition at line 388 of file avcodec.h.

◆ log_level_offset

int AVCodecContext::log_level_offset

Definition at line 389 of file avcodec.h.

◆ codec_type

enum AVMediaType AVCodecContext::codec_type

◆ codec

const struct AVCodec* AVCodecContext::codec
Examples
demuxing_decoding.c, and transcoding.c.

Definition at line 392 of file avcodec.h.

Referenced by a64multi_encode_init(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_init(), alloc_frame_buffer(), amf_copy_buffer(), amf_init_encoder(), apply_param_change(), avcodec_close(), avcodec_decode_subtitle2(), avcodec_default_get_format(), avcodec_encode_subtitle(), 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(), config_input(), context_to_name(), cuvid_decode_init(), cuvid_test_capabilities(), decode_bsfs_init(), decode_end(), decode_init(), decode_packet(), decode_receive_frame_internal(), decode_simple_internal(), do_video_out(), dpcm_decode_frame(), dpcm_decode_init(), dump_stream_format(), eightsvx_decode_init(), encode_init(), encode_receive_packet_internal(), encode_send_frame_internal(), encode_simple_internal(), ff_amf_receive_packet(), ff_aptx_init(), ff_decode_frame_props(), ff_decode_get_packet(), ff_decode_preinit(), ff_encode_preinit(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_get_buffer(), 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_thread_can_start_frame(), ff_thread_flush(), ff_vc1_parse_frame_header(), ff_wma_init(), ffmmal_init_decoder(), frame_worker_thread(), get_category(), get_nb_samples(), h263_get_format(), hap_decode(), init(), init_band_stepsize(), init_output_stream_encode(), init_prec(), mf_init(), nvdec_mpeg4_start_frame(), nvenc_check_capabilities(), nvenc_codec_specific_pic_params(), nvenc_setup_codec_config(), nvenc_setup_device(), nvenc_setup_encoder(), omx_component_init(), omx_encode_init(), pcm_decode_frame(), pcm_decode_init(), pcm_encode_frame(), pcm_encode_init(), process_frame(), process_output_surface(), reap_filters(), sbc_encode_init(), show_stream(), siren_init(), submit_packet(), thread_get_buffer_internal(), try_decode_frame(), update_context_from_thread(), vaapi_mpeg4_start_frame(), validate_thread_parameters(), vc1_decode_init(), vdpau_mpeg4_start_frame(), vp6_decode_init(), vp78_decode_frame(), vp78_decode_init(), wma_decode_init(), and worker().

◆ codec_id

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

Definition at line 393 of file avcodec.h.

Referenced by adpcm_flush(), alloc_frame_buffer(), amr_parse(), atrac3_decode_init(), atrac3p_decode_frame(), av_get_audio_frame_duration(), av_parser_parse2(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), avformat_find_stream_info(), commit_bitstream_and_slice_buffer(), cyuv_decode_frame(), decode_end(), decode_frame(), decode_frame_common(), decode_idat_chunk(), decode_init(), decode_nal_units(), decode_packet(), determinable_frame_size(), do_subtitle_out(), dsd_channel(), dump_enc_cfg(), dump_video_param(), dxva2_vc1_decode_slice(), dxva_check_codec_compatibility(), dxva_get_decoder_configuration(), encode_frame(), encode_init(), ff_aac_ac3_parse(), ff_ac3_encode_init(), ff_AMediaCodecProfile_getProfileFromAVCodecContext(), ff_draw_horiz_band(), ff_dxva2_common_frame_params(), ff_frame_thread_encoder_init(), ff_h263_decode_frame(), ff_idctdsp_init_x86(), ff_mjpeg_decode_init(), ff_mjpeg_encode_picture_header(), ff_mjpeg_receive_frame(), 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_preprocess_init(), ff_qsv_enc_init(), ff_qsv_encode(), ff_slice_thread_init(), ff_sp5x_process_packet(), ff_thread_decode_frame(), 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_rate(), gsm_decode_frame(), gsm_init(), gsm_parse(), has_codec_parameters(), imc_decode_block(), imc_decode_init(), init_output_stream(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), 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(), mf_enca_output_type_get(), mf_encv_output_adjust(), mf_init(), mjpeg_get_packet(), mpeg_decode_postinit(), 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_header(), 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_pix_fmt(), set_vpx_defaults(), stream_component_open(), try_decode_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(), vp3_decode_init(), vpx_decode(), vpx_encode(), vpx_free(), vpx_init(), vtenc_configure_encoder(), vtenc_init(), X264_init(), xma_decode_init(), and xvid_encode_init().

◆ codec_tag

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 408 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_receive_frame(), ff_mpv_decode_init(), ff_update_duplicate_context(), hap_init(), hap_parse_frame_header(), libspeex_decode_init(), magy_encode_init(), 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(), speex_decode_init(), utvideo_encode_init(), vp3_decode_init(), xsub_encoder_init(), xvid_encode_init(), zero12v_decode_frame(), and zero12v_decode_init().

◆ priv_data

void* AVCodecContext::priv_data

Definition at line 410 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_coefficients(), add_color_attr(), add_pframe_coefficients(), adpcm_compress_trellis(), adpcm_decode_frame(), adpcm_decode_init(), adpcm_encode_close(), 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(), 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(), av1_decode_flush(), av1_decode_frame(), av1_decode_free(), av1_decode_init(), av1_frame_alloc(), avcodec_close(), 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(), build_luma_lut(), build_vlc(), cavs_decode_frame(), cavs_flush(), cdg_decode_end(), cdg_decode_flush(), cdg_decode_frame(), cdg_decode_init(), cdtoons_decode_end(), cdtoons_decode_frame(), cdtoons_decode_init(), cdtoons_flush(), cdtoons_render_sprite(), cdxl_decode_end(), cdxl_decode_frame(), cdxl_decode_init(), cfhd_close(), cfhd_decode(), cfhd_encode_close(), cfhd_encode_frame(), cfhd_encode_init(), cfhd_init(), 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_reinit(), codecctl_int(), commit_bitstream_and_slice_buffer(), compress_texture(), config_enc_params(), 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(), cri_decode_close(), cri_decode_frame(), cri_decode_init(), crystalhd_decode_packet(), crystalhd_receive_frame(), cuvid_decode_end(), 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_flush(), davs2_init(), dcadec_close(), dcadec_decode_frame(), dcadec_flush(), dcadec_init(), dds_decode(), decode(), decode_ac_coeffs(), decode_aiff_header(), decode_alcd(), decode_argb(), decode_argbi(), decode_argx(), decode_argxi(), decode_avcf(), 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_frame_lscr(), decode_hq_slice_row(), decode_huff(), decode_huffman2(), decode_init(), decode_inter(), decode_interframe_v4(), decode_interframe_v4a(), decode_intra(), decode_intra_block(), decode_kfrm(), decode_lowdelay_slice(), decode_macroblock(), decode_mad1(), decode_mad1_24(), decode_mb_row_no_filter(), decode_motion_vectors(), decode_mous(), decode_move(), decode_mpos(), decode_packet(), decode_pal8(), decode_palmapdata(), decode_picture(), decode_picture_header(), decode_plane(), decode_rgb(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_rle(), decode_slice(), decode_slice_chroma(), decode_slice_luma(), decode_slice_thread(), decode_subband_arith(), decode_subband_golomb(), decode_tag(), decode_tiledata(), 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_i3(), decompress_p(), decompress_p3(), 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(), dng_decode_jpeg(), dng_decode_strip(), dng_decode_tiles(), dnxhd_calc_bits_thread(), dnxhd_decode_close(), dnxhd_decode_frame(), dnxhd_decode_init(), 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(), dsd_channel(), 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_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_av1_decode_slice(), dxva2_av1_end_frame(), dxva2_av1_start_frame(), 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(), eb_enc_close(), eb_enc_init(), eb_receive_packet(), eb_send_frame(), eightsvx_decode_close(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_apng(), encode_close(), encode_dvd_subtitles(), encode_end(), encode_frame(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_jpegls_close(), encode_jpegls_init(), encode_picture_ls(), encode_plane(), encode_png(), encode_rgb48_10bit(), encode_sample_description(), encode_slice(), encode_slice_data(), encode_superframe(), 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(), export_film_grain(), extract_header(), fastaudio_close(), fastaudio_decode(), fastaudio_init(), fdk_aac_decode_close(), fdk_aac_decode_flush(), fdk_aac_decode_frame(), fdk_aac_decode_init(), ff_ac3_encode_close(), ff_ac3_encode_frame_common_end(), ff_ac3_encode_init(), ff_ac3_float_encode_init(), ff_amf_encode_close(), ff_amf_receive_packet(), ff_aptx_init(), 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_h263_decode_end(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_update_thread_context(), ff_h264_update_thread_context_for_user(), ff_huffyuv_common_init(), ff_ivi_decode_close(), ff_ivi_decode_frame(), ff_libwebp_encode_init_common(), ff_mjpeg_decode_end(), ff_mjpeg_decode_init(), ff_mjpeg_encode_picture_header(), ff_mjpeg_receive_frame(), 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_flush(), ff_nvenc_encode_init(), ff_nvenc_receive_packet(), ff_rv34_decode_end(), ff_rv34_decode_frame(), ff_rv34_decode_init(), ff_rv34_decode_update_thread_context(), ff_snow_common_init(), ff_snow_common_init_after_header(), ff_snow_release_buffer(), ff_twinvq_decode_close(), ff_twinvq_decode_frame(), ff_twinvq_decode_init(), ff_vaapi_encode_close(), ff_vaapi_encode_init(), ff_vaapi_encode_receive_packet(), ff_vaapi_parse_hevc_rext_profile(), ff_vc1_decode_end(), ff_videotoolbox_avcc_extradata_create(), 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(), fill_tile4(), fill_tileX(), 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(), 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_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(), gem_close(), gem_decode_frame(), get_buffer(), get_current_frame(), get_cv_pixel_info(), get_length_code_size(), get_nb_samples(), get_params_size(), get_pixel_format(), get_prediction(), get_stats(), get_stream_info(), get_tiles_info(), get_vt_h264_profile_level(), get_vt_hevc_profile_level(), gif_crop_opaque(), gif_crop_translucent(), 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_flush(), h264_decode_frame(), h264_decode_init(), hap_close(), hap_compress_frame(), hap_decode(), hap_encode(), hap_init(), hap_parse_frame_header(), hcom_close(), hcom_decode(), hcom_init(), 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(), imm5_close(), imm5_decode_frame(), imm5_flush(), imm5_init(), imx_decode_close(), imx_decode_flush(), imx_decode_frame(), imx_decode_init(), init(), init_decoder(), init_frames(), init_idct(), input_callback(), ipu_decode_end(), ipu_decode_frame(), ipu_decode_init(), ipvideo_decode_end(), ipvideo_decode_frame(), ipvideo_decode_init(), ir2_decode_end(), ir2_decode_frame(), ir2_decode_init(), is_image_translucent(), 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(), libaribb24_close(), libaribb24_decode(), libaribb24_flush(), libaribb24_handle_regions(), libaribb24_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(), librav1e_encode_close(), librav1e_encode_init(), librav1e_receive_packet(), librsvg_decode_frame(), libshine_encode_close(), libshine_encode_frame(), libshine_encode_init(), libspeex_decode_close(), libspeex_decode_flush(), libspeex_decode_frame(), libspeex_decode_init(), libuavs3d_decode_frame(), libuavs3d_end(), libuavs3d_flush(), libuavs3d_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(), libx265_param_parse_float(), libx265_param_parse_int(), ljpeg_encode_bgr(), ljpeg_encode_close(), ljpeg_encode_frame(), ljpeg_encode_init(), ljpeg_encode_yuv(), log_encoder_error(), lscr_decode_close(), lscr_decode_flush(), lscr_decode_init(), 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(), mediacodec_decode_close(), mediacodec_decode_flush(), mediacodec_decode_init(), mediacodec_receive_frame(), metasound_decode_init(), mf_a_avframe_to_sample(), mf_avframe_to_sample(), mf_choose_input_type(), mf_choose_output_type(), mf_close(), mf_enca_output_score(), mf_enca_output_type_get(), mf_encv_output_adjust(), mf_encv_output_score(), mf_init(), mf_output_type_get(), mf_receive_packet(), mf_receive_sample(), mf_sample_to_avpacket(), mf_send_sample(), mf_setup_context(), mf_unlock_async(), mf_v_avframe_to_sample(), mf_wait_events(), microdvd_decode_frame(), mimic_decode_end(), mimic_decode_frame(), mimic_decode_init(), mjpeg_get_packet(), mjpegb_decode_frame(), mlp_decode_flush(), mlp_decode_init(), mlp_encode_close(), mlp_encode_frame(), mlp_encode_init(), mm_decode_end(), mm_decode_frame(), mm_decode_init(), mobiclip_close(), mobiclip_decode(), mobiclip_flush(), mobiclip_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(), 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_flush(), 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(), nb_decode(), nvdec_av1_decode_slice(), nvdec_av1_start_frame(), 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_print_error(), nvenc_push_context(), nvenc_recalc_surfaces(), nvenc_register_frame(), nvenc_send_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_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_nal_units(), parse_object_segment(), parse_opts(), parse_palette_segment(), parse_pixel_format(), parse_presentation_segment(), parse_speex_extradata(), pcm_decode_frame(), pcm_decode_init(), pcm_dvd_decode_frame(), pcm_dvd_decode_init(), pcm_dvd_decode_samples(), pcm_dvd_encode_frame(), pcm_dvd_encode_init(), pcm_dvd_parse_header(), photocd_decode_close(), photocd_decode_frame(), 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(), postprocess_luma(), predict_intra(), predict_motion(), prepare_sei_data_array(), process_block(), process_output_surface(), prores_encode_close(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), 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_flush(), 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_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_hufftable(), read_low_coeffs(), read_run_encoding(), realloc_alpha_uv(), 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(), rpza_encode_end(), rpza_encode_frame(), rpza_encode_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(), sb_decode(), sbc_decode_frame(), sbc_decode_init(), sbc_encode_frame(), sbc_encode_init(), screenpresso_close(), screenpresso_decode_frame(), screenpresso_init(), select_palette(), send_delayed_frame(), seqvideo_decode_end(), seqvideo_decode_frame(), seqvideo_decode_init(), set_constqp(), set_lossless(), set_output_frame(), set_pix_fmt(), set_sample_rate_params(), set_stats(), set_vbr(), set_vp8_defaults(), setup_hwaccel_for_pixfmt(), setup_qtables(), sga_decode_end(), sga_decode_frame(), sgi_decode_init(), shorten_decode_close(), shorten_decode_frame(), shorten_decode_init(), show_stream(), sipr_decode_frame(), sipr_decoder_init(), siren_close(), siren_decode(), siren_flush(), siren_init(), slice_end(), smc_decode_end(), smc_decode_frame(), smc_decode_init(), smc_encode_end(), smc_encode_frame(), smc_encode_init(), smv_process_frame(), speex_decode_close(), speex_decode_frame(), speex_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(), 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(), 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(), ttml_encode_close(), ttml_encode_frame(), ttml_encode_init(), ttml_write_header_content(), 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_reference_list(), update_size(), utvideo_encode_close(), utvideo_encode_frame(), utvideo_encode_init(), v210_decode_slice(), v4l2_decode_close(), v4l2_decode_init(), v4l2_encode_close(), v4l2_encode_init(), v4l2_receive_frame(), v4l2_receive_packet(), v4l2_send_frame(), v4l2_try_start(), vaapi_av1_decode_slice(), vaapi_av1_end_frame(), vaapi_av1_get_bit_depth_idx(), vaapi_av1_start_frame(), vaapi_encode_add_global_param(), vaapi_encode_alloc(), vaapi_encode_alloc_output_buffer(), vaapi_encode_check_frame(), vaapi_encode_clear_old(), vaapi_encode_create_recon_frames(), vaapi_encode_free_output_buffer(), 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_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_roi(), vaapi_encode_init_row_slice_structure(), vaapi_encode_init_slice_structure(), vaapi_encode_init_tile_slice_structure(), vaapi_encode_issue(), vaapi_encode_make_packed_header(), vaapi_encode_make_param_buffer(), vaapi_encode_make_row_slice(), vaapi_encode_make_tile_slice(), 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_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_pick_next(), vaapi_encode_profile_entrypoint(), vaapi_encode_send_frame(), vaapi_encode_set_b_pictures(), 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_parse_rext_profile(), vdpau_hevc_start_frame(), vdpau_mpeg4_start_frame(), vdpau_mpeg_decode_slice(), vdpau_mpeg_start_frame(), vdpau_vc1_decode_slice(), vdpau_vc1_start_frame(), vdpau_vp9_decode_slice(), vdpau_vp9_end_frame(), vdpau_vp9_start_frame(), 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_encode_set_roi(), 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_encode_set_roi(), 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(), webp_decode_init(), 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(), wmv2_decode_end(), wmv2_decode_init(), wmv2_encode_init(), wmv9_init(), X264_close(), 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_flush(), zerocodec_decode_frame(), and zerocodec_decode_init().

◆ internal

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 418 of file avcodec.h.

Referenced by aac_decode_frame_int(), audio_get_buffer(), avcodec_close(), avcodec_decode_subtitle2(), avcodec_flush_buffers(), avcodec_open2(), avcodec_receive_frame(), avcodec_receive_packet(), avcodec_send_frame(), avcodec_send_packet(), cfhd_decode(), cng_decode_frame(), cuvid_decode_init(), decode_bsfs_init(), decode_fill(), decode_receive_frame_internal(), decode_simple_internal(), dxva2_av1_decode_slice(), dxva2_av1_uninit(), encode_receive_packet_internal(), encode_send_frame_internal(), encode_simple_internal(), ff_alloc_entries(), ff_alloc_packet(), ff_decode_frame_props(), ff_decode_get_packet(), ff_encode_get_frame(), ff_encode_preinit(), ff_frame_thread_encoder_free(), ff_frame_thread_encoder_init(), ff_frame_thread_free(), ff_frame_thread_init(), ff_mpv_encode_picture(), 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_nvdec_start_frame_sep_ref(), ff_nvenc_receive_packet(), ff_opus_parse_extradata(), ff_reset_entries(), ff_slice_thread_execute_with_mainfunc(), ff_slice_thread_free(), ff_slice_thread_init(), 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_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(), flush(), h264_decode_init(), hevc_decode_init(), hwaccel_init(), hwaccel_uninit(), libopus_decode_init(), libopus_flush(), librav1e_receive_packet(), main_function(), nvdec_av1_decode_slice(), nvdec_av1_start_frame(), nvdec_h264_decode_slice(), nvdec_h264_start_frame(), nvdec_hevc_decode_init(), 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(), thread_execute(), thread_execute2(), thread_get_buffer_internal(), update_context_from_thread(), update_frame_pool(), vaapi_decode_find_best_format(), wma_decode_init(), worker(), worker_func(), and xma_decode_packet().

◆ opaque

void* AVCodecContext::opaque

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

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

Definition at line 425 of file avcodec.h.

Referenced by hwaccel_decode_init(), hwaccel_retrieve_data(), and update_context_from_user().

◆ bit_rate

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
transcode_aac.c.

Definition at line 433 of file avcodec.h.

Referenced by aac_encode_frame(), aac_encode_init(), ac3_decode_frame(), amf_encode_init_h264(), amf_encode_init_hevc(), amr_parse(), 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(), config_enc_params(), decode_frame(), decode_ppc(), 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_encode_preinit(), ff_mpv_encode_init(), ff_wma_init(), ffat_create_decoder(), ffat_init_encoder(), g723_1_encode_init(), g729_parse(), get_ilbc_mode(), get_mode(), ilbc_decode_init(), imm5_decode_frame(), init_bitstream_params(), init_output_stream(), init_video_param(), lame_window_init(), libgsm_encode_init(), libkvazaar_init(), libopus_configure_encoder(), libopus_encode_init(), librav1e_encode_init(), libshine_encode_init(), libspeex_decode_frame(), libvorbis_setup(), libx265_encode_init(), mark_pns(), metasound_decode_init(), mf_enca_output_score(), mf_encv_output_adjust(), mlp_parse(), mp3lame_encode_init(), MPA_encode_init(), mpeg_decode_postinit(), mpegaudio_parse(), mpegvideo_extract_headers(), nvenc_setup_encoder(), nvenc_setup_rate_control(), omx_component_init(), open_output_file(), opus_encode_init(), pcm_bluray_parse_header(), pcm_dvd_encode_init(), pcm_dvd_parse_header(), pcm_encode_init(), print_enc_params(), 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(), set_vp8_defaults(), set_vpx_defaults(), sipr_decoder_init(), sipr_split(), speex_decode_init(), 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().

◆ bit_rate_tolerance

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 441 of file avcodec.h.

Referenced by ff_mpv_encode_init(), and XAVS_init().

◆ global_quality

int AVCodecContext::global_quality

◆ compression_level

int AVCodecContext::compression_level

◆ flags

int AVCodecContext::flags

AV_CODEC_FLAG_*.

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

Definition at line 463 of file avcodec.h.

Referenced by aac_decode_init(), aac_encode_frame(), aac_encode_init(), ac3_decode_init(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_encode(), aom_init(), apply_cropping(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), atrac9_decode_init(), avcodec_receive_frame(), avcodec_string(), comp_block(), config_enc_params(), config_input(), config_props(), cri_decode_init(), cuvid_decode_init(), decode_init(), decode_simple_internal(), decode_slice_thread(), dnxhd_encode_init(), do_video_stats(), dsp_init(), eb_enc_init(), encode_frame(), encode_init(), encode_receive_packet_internal(), encode_slice_data(), ff_ac3_encode_init(), ff_ac3_float_encode_init(), ff_ass_subtitle_header_full(), ff_celt_init(), ff_dca_core_filter_frame(), ff_decode_preinit(), ff_dnxhd_find_cid(), ff_ffv1_common_init(), ff_frame_thread_encoder_init(), ff_huffyuv_common_init(), ff_idctdsp_init_arm(), ff_idctdsp_init_armv6(), ff_idctdsp_init_ppc(), ff_mjpeg_decode_init(), ff_mpegvideoencdsp_init_x86(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_nvenc_encode_init(), ff_opus_psy_init(), ff_snow_common_init(), ff_twinvq_decode_init(), ff_vaapi_encode_init(), ff_vp56_init_context(), ffat_init_encoder(), h263_get_format(), h264_decode_frame(), h264_init_context(), idct_put(), imc_decode_init(), imm5_init(), init_output_stream_encode(), init_video_param(), ipvideo_decode_init(), jpeg_put_comments(), lame_window_init(), libaribb24_generate_ass_header(), libkvazaar_init(), librav1e_encode_init(), librav1e_receive_packet(), libvorbis_encode_init(), libvorbis_setup(), libx265_encode_init(), mark_pns(), mf_init(), mimic_decode_init(), mp3lame_encode_init(), mpeg_get_pixelformat(), new_output_stream(), new_video_stream(), nvenc_send_frame(), 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(), prores_encode_init(), put_pce(), ra288_decode_init(), search_for_pns(), search_for_quantizers_twoloop(), select_rc_mode(), set_encoder_id(), siren_init(), storeframe(), svc_encode_frame(), svc_encode_init(), svq1_decode_frame(), svq1_decode_init(), svq1_encode_init(), svq3_decode_init(), tdsc_init(), tiff_init(), tqi_idct_put(), twolame_encode_init(), update_context_from_user(), update_size(), v4l2_prepare_encoder(), vaapi_encode_init_gop_structure(), vaapi_encode_init_packed_headers(), vaapi_encode_init_rate_control(), validate_thread_parameters(), vc1_decode_init(), vc2_encode_frame(), vorbis_encode_init(), vp3_decode_init(), vpx_encode(), vpx_free(), vpx_init(), vtenc_cm_to_avpacket(), vtenc_configure_encoder(), vtenc_create_encoder(), vtenc_output_callback(), X264_init(), xavs2_init(), XAVS_init(), and xvid_encode_init().

◆ flags2

int AVCodecContext::flags2

◆ extradata

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 484 of file avcodec.h.

Referenced by a64multi_encode_frame(), a64multi_encode_init(), aac_decode_init(), aac_encode_init(), aasc_decode_init(), adpcm_decode_frame(), adpcm_encode_init(), adpcm_flush(), adx_decode_init(), 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_decode_init(), av_get_audio_frame_duration(), avcodec_close(), avcodec_free_context(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avformat_find_stream_info(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bprint_to_extradata(), clv_decode_init(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), cuvid_decode_init(), decode_chunks(), decode_flush(), decode_frame(), decode_header_trees(), decode_init(), dfa_decode_frame(), dvbsub_init_decoder(), dvdsub_parse_extradata(), eb_enc_init(), encode_init(), encode_sample_description(), extract_extradata(), extract_header(), fdk_aac_decode_init(), ff_cbs_read_extradata_from_codec(), ff_flac_is_extradata_valid(), 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_decode_init(), flac_encode_frame(), flac_encode_init(), flic_decode_init(), generate_fake_vps(), get_nb_samples(), h264_decode_init(), h264_parse(), hcom_init(), hevc_decode_init(), hevc_parse(), hnm_decode_init(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), libcodec2_init_decoder(), libcodec2_init_encoder(), libkvazaar_init(), libopus_decode_init(), libopus_encode_init(), libopus_write_header(), libspeex_decode_init(), libvorbis_encode_init(), libx265_encode_init(), LLVMFuzzerTestOneInput(), m101_decode_frame(), m101_decode_init(), magy_encode_init(), main(), metasound_decode_init(), mf_close(), mf_enca_output_type_get(), mf_encv_output_type_get(), mf_init(), microdvd_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_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_specific_config(), rkmpp_send_packet(), rl2_decode_init(), rscc_init(), rv10_decode_init(), rv30_decode_init(), set_extradata(), speex_decode_init(), svc_encode_init(), svq3_decode_init(), tta_decode_init(), ttml_write_header_content(), twinvq_decode_init(), utvideo_encode_init(), vc1_decode_init(), vmdvideo_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vtenc_output_callback(), vtenc_populate_extradata(), wavesynth_parse_extradata(), wma_decode_init(), wmv2_encode_init(), X264_init(), XAVS_init(), xma_decode_init(), xvid_encode_init(), xvid_strip_vol_header(), and yop_decode_init().

◆ extradata_size

int AVCodecContext::extradata_size
Examples
qsvdec.c.

Definition at line 485 of file avcodec.h.

Referenced by a64multi_encode_init(), aac_decode_init(), aac_encode_init(), aasc_decode_init(), adpcm_decode_frame(), adpcm_encode_init(), adpcm_flush(), adx_decode_init(), alac_decode_init(), 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_decode_init(), av1_parser_parse(), avcodec_close(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avui_decode_frame(), avui_encode_init(), bfi_decode_frame(), bprint_to_extradata(), clv_decode_init(), cmap_read_palette(), concatenate_packet(), cook_decode_init(), cook_parse(), cuvid_decode_init(), decode_flush(), decode_frame(), decode_header_trees(), decode_init(), dfa_decode_frame(), dvbsub_init_decoder(), dvdsub_parse_extradata(), eb_enc_init(), encode_close(), encode_init(), encode_sample_description(), extract_extradata(), extract_header(), fdk_aac_decode_init(), ff_cbs_read_extradata_from_codec(), ff_flac_is_extradata_valid(), 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_frame(), flac_encode_init(), flic_decode_init(), generate_fake_vps(), h264_decode_init(), h264_parse(), hcom_init(), hevc_decode_init(), hevc_parse(), hnm_decode_init(), init(), latm_decode_audio_specific_config(), latm_decode_frame(), latm_decode_init(), libcodec2_init_decoder(), libcodec2_init_encoder(), libkvazaar_init(), libopus_decode_init(), libopus_encode_init(), libspeex_decode_init(), libvorbis_encode_init(), libx265_encode_init(), LLVMFuzzerTestOneInput(), m101_decode_init(), magy_encode_init(), main(), metasound_decode_init(), mf_close(), mf_enca_output_type_get(), mf_encv_output_type_get(), 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_specific_config(), rkmpp_send_packet(), rl2_decode_init(), rscc_init(), rv10_decode_init(), rv30_decode_init(), rv30_parse_slice_header(), set_extradata(), speex_decode_init(), svc_encode_init(), svq3_decode_init(), tta_decode_init(), ttml_write_header_content(), twinvq_decode_init(), utvideo_encode_init(), vc1_decode_init(), vorbis_decode_init(), vorbis_encode_init(), vtenc_populate_extradata(), wavesynth_parse_extradata(), wma_decode_init(), wmv2_encode_init(), X264_init(), XAVS_init(), xma_decode_init(), xvid_encode_init(), xvid_strip_vol_header(), and yop_decode_init().

◆ time_base

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, muxing.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 506 of file avcodec.h.

Referenced by adjust_frame_pts_to_encoder_tb(), amf_encode_init_h264(), amf_encode_init_hevc(), aom_init(), av1_parser_parse(), av_stream_get_codec_timebase(), avcodec_open2(), avcodec_string(), avformat_find_stream_info(), avformat_transfer_internal_stream_timing_info(), check_recording_time(), close_output_stream(), config_enc_params(), config_input(), config_props(), cpia_decode_init(), dec_enc(), decode_simple_internal(), do_audio_out(), do_subtitle_out(), do_video_out(), do_video_stats(), dvd_nav_parse(), dvvideo_encode_init(), encode_frame_rate(), encode_init(), encode_write_frame(), fdk_aac_decode_frame(), ff_af_queue_add(), ff_encode_preinit(), ff_guess_coded_bitrate(), ff_mpv_encode_init(), ff_mpv_encode_picture(), ff_qsv_encode(), ff_samples_to_time_base(), flush_encoders(), get_audio_frame(), get_fps(), h264_parse(), init_encoder_time_base(), init_filter(), init_output_stream(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), libaribb24_decode(), libkvazaar_init(), librav1e_encode_init(), libwebp_anim_encode_frame(), libx265_encode_init(), main(), mf_encv_output_adjust(), mf_get_tb(), mpegvideo_extract_headers(), nvenc_setup_encoder(), oggvorbis_decode_init(), omx_component_init(), omx_encode_frame(), open_output_file(), output_audio_frame(), parse_avs3_nal_units(), parse_forced_key_frames(), submit_frame(), svc_encode_init(), update_context_from_thread(), vaapi_encode_h264_init_sequence_params(), vaapi_encode_h265_init_sequence_params(), vaapi_encode_init_rate_control(), vaapi_encode_mpeg2_init_sequence_params(), vc1_extract_header(), vc2_encode_init(), vpx_init(), vtenc_cm_to_avpacket(), vtenc_populate_extradata(), vtenc_send_frame(), X264_init(), XAVS_init(), xvid_correct_framerate(), and xvid_encode_init().

◆ ticks_per_frame

int AVCodecContext::ticks_per_frame

◆ delay

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 539 of file avcodec.h.

Referenced by avcodec_parameters_to_context(), ff_frame_thread_init(), ff_mpv_encode_init(), ff_opus_parse_extradata(), init_thread(), and libopus_decode_init().

◆ width

int AVCodecContext::width

picture width / height.

Note
Those fields may not match the values of the last AVFrame output by avcodec_receive_frame() 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, filtering_video.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 556 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), aic_decode_init(), 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_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(), bitpacked_decode_uyvy422(), bitpacked_decode_yuv422p10(), bitpacked_init_decoder(), bmp_decode_frame(), bmp_encode_frame(), cdtoons_render_sprite(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cfhd_encode_frame(), cfhd_encode_init(), choose_tiling(), cinepak_decode_init(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), clear_plane(), cllc_decode_frame(), clv_decode_init(), compress_texture(), compute_dar(), config_enc_params(), config_input(), config_props(), create_cv_pixel_buffer_info(), cri_decode_frame(), cuvid_handle_video_sequence(), 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_blocks(), 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_frame_lscr(), decode_huff(), decode_huffman2(), decode_init(), decode_inter(), decode_intra(), decode_mous(), decode_move(), decode_mvdv(), decode_picture_header(), decode_raw_intra(), decode_raw_intra_rgb(), decode_rgb(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_rle(), decode_rle16(), decode_rle_bpp2(), decode_rle_bpp4(), decode_run_i(), decode_run_p(), decode_runlen(), decode_sequence_header_adv(), decode_simple_internal(), decode_ybr(), decode_ybr10(), decode_ybr10i(), decode_ybri(), decode_ybyr(), decode_yry10(), decode_yry10i(), decompress_i(), decompress_i3(), decompress_p(), decompress_p3(), dfa_decode_frame(), dfa_decode_init(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_init(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_video_stats(), draw_char(), draw_cursor(), dvbsub_decode(), dvbsub_encode(), 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(), encode_apng(), encode_frame(), encode_frame_size(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_jpegls_init(), encode_picture_ls(), encode_png(), encode_receive_packet_internal(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_frame(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), execute_code(), export_stream_params(), ff_amf_receive_packet(), ff_asv_common_init(), ff_ccitt_unpack(), ff_dnxhd_find_cid(), ff_encode_preinit(), ff_ffv1_common_init(), ff_get_buffer(), ff_guess_coded_bitrate(), 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_mpv_encode_init(), ff_mpv_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_set_sar(), ff_snow_common_init_after_header(), ff_sp5x_process_packet(), 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(), fill_tile4(), fill_tileX(), find_slice_quant(), fits_encode_frame(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_frame(), gdv_decode_init(), gem_decode_frame(), get_buffer_with_edge(), get_cv_pixel_info(), gif_crop_opaque(), gif_crop_translucent(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), h264_init_context(), hap_init(), has_codec_parameters(), hnm_decode_init(), hqx_decode_frame(), hscroll(), imm5_decode_frame(), imx_decode_init(), init(), init_filter(), init_filters(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipu_decode_frame(), ipvideo_decode_init(), ir2_decode_frame(), is_image_translucent(), 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(), librav1e_encode_init(), librsvg_decode_frame(), libwebp_anim_encode_init(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_init(), ljpeg_encode_yuv(), load_buffer(), m101_decode_frame(), magy_encode_frame(), magy_encode_init(), main(), mediacodec_dec_parse_format(), mediacodec_decode_init(), mediacodec_wrap_hw_buffer(), mediacodec_wrap_sw_buffer(), mf_encv_output_adjust(), mf_v_avframe_to_sample(), mj2_create_image(), mm_decode_init(), mobiclip_decode(), mobiclip_init(), mp_decode_frame(), mp_decode_init(), mpeg4_decode_header(), mpegvideo_extract_headers(), msp2_decode_frame(), 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_frame(), msvideo1_decode_init(), 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(), paf_video_init(), pam_encode_frame(), parse_avs3_nal_units(), parse_object_segment(), parse_presentation_segment(), pcx_encode_frame(), photocd_decode_frame(), pixlet_decode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), predict_intra(), predict_motion(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), put_lines_bits(), put_lines_bytes(), qsv_decode_init_context(), qsv_get_continuous_buffer(), qtrle_encode_init(), receive_frame(), reget_buffer_internal(), rkmpp_retrieve_frame(), rl2_decode_init(), rle_uncompress(), roq_decode_init(), roq_encode_init(), rpza_encode_frame(), rpza_encode_init(), rscc_decode_frame(), rscc_init(), screenpresso_decode_frame(), screenpresso_init(), set_context_with_sequence(), sga_decode_frame(), sgirle_decode_frame(), smc_encode_frame(), 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(), tgq_decode_frame(), tmv_decode_frame(), to_meta_with_crop(), truemotion2rt_decode_frame(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_context_with_frame_header(), utvideo_encode_frame(), utvideo_encode_init(), v210_decode_slice(), 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_decode_slice(), 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(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1_extract_header(), vc2_encode_init(), vcr1_decode_frame(), vcr1_decode_init(), vdpau_vp9_start_frame(), vp8_lossy_decode_frame(), vpx_decode(), vpx_init(), vtenc_create_encoder(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), 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(), and zerocodec_decode_frame().

◆ height

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

Definition at line 556 of file avcodec.h.

Referenced by a64multi_encode_frame(), aasc_decode_frame(), aic_decode_init(), 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_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(), bitpacked_decode_uyvy422(), bitpacked_decode_yuv422p10(), bitpacked_init_decoder(), bmp_decode_frame(), bmp_encode_frame(), cdg_decode_flush(), cdg_decode_frame(), cdtoons_decode_frame(), cdtoons_render_sprite(), cdxl_decode_frame(), cdxl_decode_ham6(), cdxl_decode_ham8(), cfhd_decode(), cfhd_encode_frame(), cfhd_encode_init(), choose_tiling(), cinepak_decode_init(), cinepak_encode_init(), cinvideo_decode_frame(), cinvideo_decode_init(), clear_plane(), cllc_decode_frame(), clv_decode_init(), comp_block(), compress_texture(), compute_dar(), config_enc_params(), config_input(), config_props(), copy_plane(), cpia_decode_frame(), create_cv_pixel_buffer_info(), cri_decode_frame(), cuvid_handle_video_sequence(), 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_block(), decode_blocks(), 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_frame_lscr(), decode_huffman2(), decode_init(), decode_inter(), decode_intra(), decode_kfrm(), decode_mous(), decode_move(), decode_mvdv(), decode_picture_header(), decode_raw_intra(), decode_raw_intra_rgb(), decode_rgb(), decode_rgb24_frame(), decode_rgbi(), decode_rgbx(), decode_rgbxi(), decode_rle(), decode_rle16(), decode_rle_bpp2(), decode_rle_bpp4(), decode_run_i(), decode_run_p(), decode_runlen(), decode_runlen_rgb(), decode_sequence_header_adv(), decode_simple_internal(), decode_ybr(), decode_ybr10(), decode_ybr10i(), decode_ybri(), decode_ybyr(), decode_yry10(), decode_yry10i(), decode_yuv_frame(), decompress_i(), decompress_i3(), decompress_p(), decompress_p3(), dfa_decode_frame(), dfa_decode_init(), dnxhd_decode_frame(), dnxhd_decode_init(), dnxhd_encode_init(), dnxhd_mb_var_thread(), dnxhd_write_header(), do_vflip(), do_video_stats(), draw_char(), draw_cursor(), dvbsub_decode(), dvbsub_encode(), dvbsub_parse_display_definition_segment(), dvdsub_init(), dvvideo_decode_frame(), 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_mpeg2_end_frame(), dxva2_vc1_end_frame(), encode_apng(), encode_frame(), encode_frame_size(), encode_gbrp10(), encode_gbrp12(), encode_headers(), encode_init(), encode_jpegls_init(), encode_picture_ls(), encode_png(), encode_receive_packet_internal(), encode_rgb48_10bit(), encode_slice(), erase_screen(), escape124_decode_init(), escape130_decode_frame(), escape130_decode_init(), execute_code(), export_stream_params(), extract_header(), ff_amf_receive_packet(), ff_asv_common_init(), ff_dnxhd_find_cid(), ff_draw_horiz_band(), ff_encode_preinit(), ff_ffv1_common_init(), ff_get_buffer(), ff_guess_coded_bitrate(), ff_h264_draw_horiz_band(), 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_mjpeg_receive_frame(), ff_mpv_encode_init(), ff_mpv_frame_start(), ff_msmpeg4_decode_init(), ff_mss12_decode_init(), ff_pnm_decode_header(), ff_set_sar(), ff_slice_thread_init(), ff_sp5x_process_packet(), 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(), fill_tile4(), fill_tileX(), find_slice_quant(), fits_encode_frame(), flashsv2_encode_init(), flashsv_decode_frame(), flashsv_encode_init(), flip(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_frame(), gdv_decode_init(), gem_decode_frame(), get_buffer_with_edge(), get_cv_pixel_info(), gif_crop_opaque(), gif_crop_translucent(), gif_encode_frame(), gif_encode_init(), gif_image_write_image(), h264_init_context(), hap_init(), hnm_decode_init(), hqx_decode_frame(), hscroll(), imm5_decode_frame(), imx_decode_init(), init(), init_filter(), init_filters(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipu_decode_frame(), ipvideo_decode_init(), ir2_decode_frame(), is_image_translucent(), 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(), librav1e_encode_init(), libwebp_anim_encode_init(), libx265_encode_init(), ljpeg_encode_frame(), ljpeg_encode_yuv(), load_buffer(), m101_decode_frame(), magy_encode_frame(), magy_encode_init(), main(), mediacodec_dec_parse_format(), mediacodec_decode_init(), mediacodec_wrap_hw_buffer(), mediacodec_wrap_sw_buffer(), mf_encv_output_adjust(), mf_v_avframe_to_sample(), mj2_create_image(), mm_decode_init(), mobiclip_decode(), mobiclip_init(), mp_decode_frame(), mp_decode_init(), mpeg4_decode_header(), mpegvideo_extract_headers(), msp2_decode_frame(), 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_frame(), msvideo1_decode_init(), 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(), paf_video_init(), pam_encode_frame(), parse_avs3_nal_units(), parse_object_segment(), parse_palette_segment(), parse_presentation_segment(), pcx_encode_frame(), photocd_decode_frame(), pixlet_decode_frame(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), predict_intra(), predict_motion(), print_report(), prores_encode_frame(), prores_encode_init(), prores_encode_picture(), put_lines_bits(), put_lines_bytes(), qsv_decode_init_context(), qsv_get_continuous_buffer(), qtrle_encode_init(), receive_frame(), reget_buffer_internal(), rkmpp_retrieve_frame(), rl2_decode_init(), roq_decode_init(), roq_encode_init(), rpza_encode_frame(), rpza_encode_init(), rscc_decode_frame(), rscc_init(), screenpresso_decode_frame(), screenpresso_init(), set_context_with_sequence(), sga_decode_frame(), sgirle_decode_frame(), smc_encode_frame(), smv_process_frame(), 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(), tgq_decode_frame(), tmv_decode_frame(), to_meta_with_crop(), truemotion2rt_decode_frame(), tscc2_decode_init(), txd_decode_frame(), ulti_decode_init(), update_context_from_thread(), update_context_with_frame_header(), utvideo_encode_frame(), utvideo_encode_init(), v210_decode_slice(), v308_decode_frame(), v308_encode_frame(), v408_decode_frame(), v408_encode_frame(), v410_decode_frame(), v410_decode_slice(), 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_mjpeg_start_frame(), vaapi_vp8_start_frame(), vaapi_vp9_start_frame(), vble_decode_frame(), vble_decode_init(), vc1_decode_frame(), vc1_decode_init(), vc1_extract_header(), vc2_encode_init(), vcr1_decode_frame(), vcr1_decode_init(), vdpau_vp9_start_frame(), vp8_lossy_decode_frame(), vpx_decode(), vpx_init(), vtenc_create_encoder(), X264_init(), xan_decode_chroma(), xan_decode_frame_type0(), xan_decode_frame_type1(), xan_decode_init(), 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(), and zerocodec_decode_frame().

◆ coded_width

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.

Definition at line 571 of file avcodec.h.

Referenced by avcodec_default_get_buffer2(), avcodec_open2(), avcodec_string(), cfhd_decode(), copy_block(), copyadd_block(), cuvid_decode_init(), dds_decode(), decode_frame(), decode_init(), decode_inter(), decode_intra(), decode_motion_vectors(), 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_get_buffer(), ff_h263_decode_frame(), ff_mpv_decode_init(), ff_mss12_decode_init(), ff_nvdec_decode_init(), ff_nvdec_frame_params(), ff_sp5x_process_packet(), ff_vaapi_decode_init(), ff_vdpau_common_init(), ff_vdpau_common_reinit(), ff_vp56_decode_frame(), h261_decode_frame(), hap_decode(), hap_init(), hqx_decode_frame(), imm5_decode_frame(), magy_decode_frame(), magy_decode_slice(), magy_decode_slice10(), mpeg4_decode_header(), mpeg_decode_init(), mpeg_decode_postinit(), mpegvideo_extract_headers(), qsv_decode_init_context(), qsv_decode_preinit(), qsv_process_data(), rv10_decode_init(), rv30_decode_init(), show_stream(), smv_process_frame(), txd_decode_frame(), update_context_from_thread(), v4l2_decode_init(), v4l2_try_start(), vaapi_decode_make_config(), vc1_decode_frame(), vc1_decode_init(), vc1_extract_header(), vcr2_init_sequence(), vp3_decode_init(), and vp56_size_changed().

◆ coded_height

int AVCodecContext::coded_height

◆ gop_size

int AVCodecContext::gop_size

◆ pix_fmt

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, filtering_video.c, transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 593 of file avcodec.h.

Referenced by aasc_decode_frame(), aasc_decode_init(), aic_decode_init(), alloc_buffers(), alloc_frame_buffer(), amf_init_encoder(), aom_decode(), aom_init(), aura_decode_init(), 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(), cdtoons_decode_init(), cdxl_decode_frame(), cfhd_decode(), cfhd_encode_frame(), cfhd_encode_init(), 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(), config_enc_params(), config_input(), config_props(), copy_frame(), cpia_decode_init(), create_cv_pixel_buffer(), create_cv_pixel_buffer_info(), cri_decode_frame(), 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_idat_chunk(), decode_init(), decode_simple_internal(), decode_slice_thread(), decode_wmv9(), dfa_decode_init(), dirac_decode_data_unit(), dnxhd_decode_frame(), dnxhd_encode_init(), dnxhd_encode_thread(), dnxhd_write_header(), draw_cursor(), dvvideo_decode_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_jpegls_init(), encode_picture_ls(), encode_plane(), escape124_decode_init(), escape130_decode_init(), 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_encode_preinit(), ff_get_buffer(), ff_guess_coded_bitrate(), ff_h263_decode_frame(), ff_h263_decode_init(), ff_h264_draw_horiz_band(), ff_huffyuvencdsp_init_x86(), ff_libwebp_get_frame(), ff_mjpeg_encode_check_pix_fmt(), ff_mjpeg_encode_picture_header(), ff_mjpeg_init_hvsample(), ff_mjpeg_receive_frame(), ff_mpv_encode_init(), ff_nvenc_encode_close(), ff_nvenc_encode_init(), ff_pnm_decode_header(), 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(), g2m_decode_frame(), g2m_decode_init(), gdv_decode_init(), gem_decode_frame(), get_buffer_with_edge(), get_pixel_format(), gif_decode_init(), gif_encode_frame(), gif_encode_init(), h261_decode_init(), h263_get_format(), handle_p_frame_apng(), hap_init(), has_codec_parameters(), hnm_decode_init(), hqx_decode_frame(), hw_device_setup_for_encode(), idcin_decode_init(), imm5_decode_frame(), imx_decode_init(), init(), init_decoder(), init_filter(), init_filters(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), ipu_decode_init(), ipvideo_decode_init(), ir2_decode_init(), j2kenc_init(), jpeg_put_comments(), lag_decode_arith_plane(), lag_decode_frame(), lag_pred_line(), libkvazaar_encode(), libopenjpeg_decode_frame(), libopenjpeg_encode_frame(), librav1e_encode_init(), librsvg_decode_frame(), libuavs3d_decode_frame(), libx265_encode_frame(), libx265_encode_init(), ljpeg_encode_bgr(), ljpeg_encode_frame(), lscr_decode_init(), 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(), mf_encv_input_adjust(), mf_encv_input_score(), mf_v_avframe_to_sample(), mimic_decode_frame(), mj2_create_image(), mm_decode_init(), mobiclip_init(), mp_decode_init(), mpeg_decode_postinit(), msp2_decode_frame(), msrle_decode_frame(), msrle_decode_init(), mss1_decode_init(), mss2_decode_frame(), mss2_decode_init(), mss3_decode_init(), mss4_decode_init(), 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(), paf_video_init(), pam_encode_frame(), parse_avs3_nal_units(), parse_palette(), parse_pixel_format(), pcx_decode_frame(), pcx_encode_frame(), photocd_decode_init(), pix_decode_frame(), pixlet_init(), png_enc_init(), pnm_decode_frame(), pnm_encode_frame(), pnm_parse(), process_output_surface(), prores_encode_frame(), prores_encode_init(), ptx_decode_frame(), qsv_decode(), qsv_decode_init_context(), qsv_decode_preinit(), qsv_get_continuous_buffer(), qsv_process_data(), qtrle_decode_init(), qtrle_encode_init(), raw_encode_init(), raw_init_decoder(), 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(), setup_hwaccel_for_pixfmt(), sga_decode_init(), sgirle_decode_init(), smc_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(), tmv_decode_init(), tqi_decode_init(), 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(), 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_create_encoder(), 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().

◆ draw_horiz_band

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 618 of file avcodec.h.

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

◆ get_format

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

Callback to negotiate the pixel format.

Decoding only, may be set by the caller before avcodec_open2().

Called by some decoders to select the pixel format that will be used for the output frames. This is mainly used to set up hardware acceleration, then the provided format list contains the corresponding hwaccel pixel formats alongside the "software" one. The software pixel format may also be retrieved from sw_pix_fmt.

This callback will be called when the coded frame properties (such as resolution, pixel format, etc.) change and more than one output format is supported for those new properties. If a hardware pixel format is chosen and initialization for it fails, the callback may be called again immediately.

This callback may be called from different threads if the decoder is multi-threaded, but not from more than one thread simultaneously.

Parameters
fmtlist of formats which may be used in the current configuration, terminated by AV_PIX_FMT_NONE.
Warning
Behavior is undefined if the callback returns a value other than one of the formats in fmt or AV_PIX_FMT_NONE.
Returns
the chosen format or AV_PIX_FMT_NONE
Examples
hw_decode.c, qsvdec.c, and vaapi_transcode.c.

Definition at line 647 of file avcodec.h.

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

◆ max_b_frames

int AVCodecContext::max_b_frames

◆ b_quant_factor

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 664 of file avcodec.h.

Referenced by init_video_param(), libx265_encode_init(), 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().

◆ b_quant_offset

float AVCodecContext::b_quant_offset

qscale offset between IP and B-frames

  • encoding: Set by user.
  • decoding: unused

Definition at line 671 of file avcodec.h.

Referenced by init_video_param(), set_constqp(), set_vbr(), vaapi_encode_h264_configure(), vaapi_encode_h265_configure(), vaapi_encode_mpeg2_configure(), vaapi_encode_vp9_configure(), and xvid_encode_init().

◆ has_b_frames

int AVCodecContext::has_b_frames

◆ i_quant_factor

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 688 of file avcodec.h.

Referenced by init_video_param(), libx265_encode_init(), 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().

◆ i_quant_offset

float AVCodecContext::i_quant_offset

qscale offset between P and I-frames

  • encoding: Set by user.
  • decoding: unused

Definition at line 695 of file avcodec.h.

Referenced by init_video_param(), set_constqp(), set_vbr(), vaapi_encode_h264_configure(), vaapi_encode_h265_configure(), vaapi_encode_mpeg2_configure(), vaapi_encode_vp8_configure(), and vaapi_encode_vp9_configure().

◆ lumi_masking

float AVCodecContext::lumi_masking

luminance masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 702 of file avcodec.h.

Referenced by ff_mpv_encode_init(), and xvid_encode_init().

◆ temporal_cplx_masking

float AVCodecContext::temporal_cplx_masking

temporary complexity masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 709 of file avcodec.h.

Referenced by ff_mpv_encode_init().

◆ spatial_cplx_masking

float AVCodecContext::spatial_cplx_masking

spatial complexity masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 716 of file avcodec.h.

Referenced by ff_mpv_encode_init().

◆ p_masking

float AVCodecContext::p_masking

p block masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 723 of file avcodec.h.

Referenced by ff_mpv_encode_init().

◆ dark_masking

float AVCodecContext::dark_masking

darkness masking (0-> disabled)

  • encoding: Set by user.
  • decoding: unused

Definition at line 730 of file avcodec.h.

Referenced by ff_mpv_encode_init().

◆ slice_count

int AVCodecContext::slice_count

slice count

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

Definition at line 737 of file avcodec.h.

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

◆ slice_offset

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 744 of file avcodec.h.

Referenced by get_slice_offset(), and update_context_from_user().

◆ sample_aspect_ratio

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 753 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(), encode_aspect_ratio(), encode_frame(), encode_headers(), encode_init(), ff_canopus_parse_info_tag(), ff_decode_frame_props(), ff_h263_decode_frame(), ff_mpv_encode_init(), ff_set_sar(), ffmal_update_format(), ffmmal_init_decoder(), gem_decode_frame(), 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(), mpeg_decode_postinit(), new_video_stream(), open_output_file(), pcx_decode_frame(), pcx_encode_frame(), reap_filters(), receive_frame(), set_context_with_sequence(), svc_encode_init(), update_context_from_thread(), update_context_with_frame_header(), 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().

◆ me_cmp

int AVCodecContext::me_cmp

motion estimation comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 760 of file avcodec.h.

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

◆ me_sub_cmp

int AVCodecContext::me_sub_cmp

subpixel motion estimation comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 766 of file avcodec.h.

Referenced by config_props().

◆ mb_cmp

int AVCodecContext::mb_cmp

macroblock comparison function (not supported yet)

  • encoding: Set by user.
  • decoding: unused

Definition at line 772 of file avcodec.h.

Referenced by config_props().

◆ ildct_cmp

int AVCodecContext::ildct_cmp

interlaced DCT comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 778 of file avcodec.h.

Referenced by dvvideo_encode_init(), and ff_mpv_encode_init().

◆ dia_size

int AVCodecContext::dia_size

ME diamond size & shape.

  • encoding: Set by user.
  • decoding: unused

Definition at line 802 of file avcodec.h.

Referenced by config_props(), and encode_frame().

◆ last_predictor_count

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 809 of file avcodec.h.

◆ me_pre_cmp

int AVCodecContext::me_pre_cmp

motion estimation prepass comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 816 of file avcodec.h.

◆ pre_dia_size

int AVCodecContext::pre_dia_size

ME prepass diamond size & shape.

  • encoding: Set by user.
  • decoding: unused

Definition at line 823 of file avcodec.h.

◆ me_subpel_quality

int AVCodecContext::me_subpel_quality

subpel ME quality

  • encoding: Set by user.
  • decoding: unused

Definition at line 830 of file avcodec.h.

Referenced by X264_init(), and XAVS_init().

◆ me_range

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 839 of file avcodec.h.

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

◆ slice_flags

int AVCodecContext::slice_flags

slice flags

  • encoding: unused
  • decoding: Set by user.

Definition at line 846 of file avcodec.h.

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

◆ mb_decision

int AVCodecContext::mb_decision

macroblock decision mode

  • encoding: Set by user.
  • decoding: unused

Definition at line 856 of file avcodec.h.

Referenced by dnxhd_calc_bits_thread(), dnxhd_encode_picture(), ff_mpv_encode_init(), ff_mpv_encode_picture(), and xvid_encode_init().

◆ intra_matrix

uint16_t* AVCodecContext::intra_matrix

custom intra quantization matrix Must be allocated with the av_malloc() family of functions, and will be freed in avcodec_free_context().

  • encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
  • decoding: Set/allocated/freed by libavcodec.

Definition at line 868 of file avcodec.h.

Referenced by avcodec_free_context(), ff_mpv_encode_init(), new_video_stream(), and xvid_encode_init().

◆ inter_matrix

uint16_t* AVCodecContext::inter_matrix

custom inter quantization matrix Must be allocated with the av_malloc() family of functions, and will be freed in avcodec_free_context().

  • encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
  • decoding: Set/allocated/freed by libavcodec.

Definition at line 877 of file avcodec.h.

Referenced by avcodec_free_context(), ff_mpv_encode_init(), new_video_stream(), and xvid_encode_init().

◆ intra_dc_precision

int AVCodecContext::intra_dc_precision

precision of the intra DC coefficient - 8

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

Definition at line 884 of file avcodec.h.

Referenced by ff_mpv_encode_init().

◆ skip_top

int AVCodecContext::skip_top

Number of macroblock rows at the top which are skipped.

  • encoding: unused
  • decoding: Set by user.

Definition at line 891 of file avcodec.h.

◆ skip_bottom

int AVCodecContext::skip_bottom

Number of macroblock rows at the bottom which are skipped.

  • encoding: unused
  • decoding: Set by user.

Definition at line 898 of file avcodec.h.

Referenced by decode_chunks().

◆ mb_lmin

int AVCodecContext::mb_lmin

minimum MB Lagrange multiplier

  • encoding: Set by user.
  • decoding: unused

Definition at line 905 of file avcodec.h.

Referenced by encode_init().

◆ mb_lmax

int AVCodecContext::mb_lmax

maximum MB Lagrange multiplier

  • encoding: Set by user.
  • decoding: unused

Definition at line 912 of file avcodec.h.

Referenced by encode_init().

◆ bidir_refine

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

Definition at line 918 of file avcodec.h.

◆ keyint_min

int AVCodecContext::keyint_min

minimum GOP size

  • encoding: Set by user.
  • decoding: unused

Definition at line 925 of file avcodec.h.

Referenced by aom_init(), cinepak_encode_init(), encode_frame(), encode_init(), flashsv2_encode_frame(), librav1e_encode_init(), libx265_encode_init(), vpx_init(), X264_init(), and XAVS_init().

◆ refs

int AVCodecContext::refs

◆ mv0_threshold

int AVCodecContext::mv0_threshold

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

  • encoding: Set by user.
  • decoding: unused

Definition at line 939 of file avcodec.h.

◆ color_primaries

enum AVColorPrimaries AVCodecContext::color_primaries

◆ color_trc

enum AVColorTransferCharacteristic AVCodecContext::color_trc

◆ colorspace

enum AVColorSpace AVCodecContext::colorspace

◆ color_range

enum AVColorRange AVCodecContext::color_range

◆ chroma_sample_location

enum AVChromaLocation AVCodecContext::chroma_sample_location

◆ slices

int AVCodecContext::slices

◆ field_order

enum AVFieldOrder AVCodecContext::field_order

◆ sample_rate

int AVCodecContext::sample_rate

samples per second

Examples
demuxing_decoding.c, filtering_audio.c, transcode_aac.c, and transcoding.c.

Definition at line 992 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(), adpcm_encode_init(), adx_encode_header(), adx_encode_init(), alac_decode_init(), alac_encode_init(), 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_receive_frame(), avcodec_string(), cng_decode_init(), compute_frame_duration(), create_vorbis_context(), dca_parse(), decode_aiff_header(), decode_audio(), decode_frame(), decode_init(), decode_ppc(), decode_simple_internal(), decode_wave_header(), dolby_e_decode_frame(), dolby_e_parse(), dss_sp_decode_init(), encode_init(), ff_aac_ac3_parse(), ff_aac_search_for_is(), ff_adx_decode_header(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_encode_preinit(), ff_flac_parse_streaminfo(), 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_rate(), get_stream_info(), gsm_init(), has_codec_parameters(), ilbc_decode_init(), ilbc_encode_init(), imc_decode_init(), init_bitstream_params(), init_filter(), init_filters(), init_output_frame(), init_output_stream_encode(), init_resampler(), 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(), mf_enca_input_adjust(), mf_enca_input_score(), mf_enca_output_score(), 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_output_file(), opus_decode_init(), opus_write_extradata(), parse_packet(), pcm_bluray_parse_header(), pcm_dvd_encode_init(), pcm_dvd_parse_header(), pcm_encode_init(), 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(), siren_decode(), speex_decode_init(), 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(), and wavpack_encode_init().

◆ channels

int AVCodecContext::channels

number of audio channels

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

Definition at line 993 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(), adpcm_decode_frame(), adpcm_decode_init(), 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_parse(), amr_wb_encode_init(), amrnb_decode_frame(), amrnb_decode_init(), amrwb_decode_frame(), amrwb_decode_init(), ape_decode_init(), apply_param_change(), apply_window_and_mdct(), atrac1_decode_frame(), atrac1_decode_init(), atrac3_decode_init(), atrac9_decode_init(), av_get_audio_frame_duration(), avcodec_open2(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), binkaudio_receive_frame(), bmv_aud_decode_init(), cinaudio_decode_init(), cng_decode_init(), cng_encode_init(), configure_output_audio_filter(), construct_perm_table(), cook_decode_init(), cook_parse(), 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(), dolby_e_parse(), dpcm_decode_frame(), dpcm_decode_init(), dsd_channel(), dss_sp_decode_init(), eightsvx_decode_frame(), eightsvx_decode_init(), encode_frame(), encode_init(), evrc_decode_init(), fastaudio_decode(), fastaudio_init(), fdk_aac_decode_frame(), ff_aac_ac3_parse(), ff_ac3_validate_metadata(), ff_adx_decode_header(), ff_aptx_init(), ff_dca_lbr_filter_frame(), ff_dca_set_channel_layout(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_decode_preinit(), ff_encode_preinit(), ff_flac_parse_streaminfo(), ff_flac_set_channel_layout(), ff_get_buffer(), ff_opus_parse_extradata(), ff_psy_init(), 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_frame(), g723_1_decode_init(), g723_1_encode_init(), g723_1_parse(), g729_parse(), get_audio_frame(), get_best_header(), get_nb_samples(), get_stream_info(), gsm_init(), has_codec_parameters(), hcom_init(), 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(), lame_window_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(), mf_a_avframe_to_sample(), mf_enca_input_adjust(), mf_enca_input_score(), mf_enca_output_score(), 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(), open_output_file(), opus_decode_packet(), opus_encode_init(), opus_write_extradata(), output_configure(), output_data(), paf_audio_init(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_frame(), pcm_decode_init(), pcm_dvd_decode_samples(), pcm_dvd_encode_frame(), pcm_dvd_encode_init(), pcm_dvd_parse_header(), pcm_encode_frame(), pcm_encode_init(), pop_output_configuration(), print_enc_params(), qcelp_decode_init(), qdm2_decode_init(), qdmc_decode_init(), ra144_decode_init(), ra144_encode_init(), ra288_decode_init(), read_access_unit(), read_and_decode_spectrum(), read_diff_float_data(), read_frame_data(), read_frame_internal(), read_major_sync(), read_restart_header(), read_specific_config(), reap_filters(), roq_dpcm_encode_frame(), roq_dpcm_encode_init(), run_test(), s302m_decode_frame(), s302m_encode2_frame(), s302m_encode_init(), s302m_parse_frame_header(), sbc_decode_frame(), sbc_encode_init(), sbc_parse_header(), search_for_pns(), search_for_quantizers_fast(), search_for_quantizers_twoloop(), set_channel_params(), sipr_decoder_init(), siren_init(), smka_decode_frame(), smka_decode_init(), speex_decode_frame(), speex_decode_init(), 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_frame(), wavpack_encode_init(), ws_snd_decode_init(), and xma_decode_init().

◆ sample_fmt

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, filtering_audio.c, transcode_aac.c, and transcoding.c.

Definition at line 1000 of file avcodec.h.

Referenced by aac_decode_init(), ac3_decode_init(), adpcm_decode_init(), adx_decode_init(), alac_decode_init(), alac_encode_init(), amrnb_decode_init(), amrwb_decode_init(), ape_decode_init(), atrac1_decode_init(), atrac3_decode_init(), atrac3p_decode_init(), atrac9_decode_init(), 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(), decode(), decode_frame(), decode_init(), decode_simple_internal(), decoder_init(), dolby_e_decode_frame(), dolby_e_parse(), dpcm_decode_init(), dprint_options(), dss_sp_decode_init(), eightsvx_decode_init(), evrc_decode_init(), fastaudio_init(), fdk_aac_decode_frame(), fdk_aac_decode_init(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_decode_frame_props(), ff_encode_preinit(), ff_twinvq_decode_init(), ffat_copy_samples(), ffat_create_decoder(), ffat_decode(), ffat_encode_callback(), ffat_init_encoder(), filter_frame_fixed(), filter_frame_float(), flac_decode_init(), flac_encode_init(), g722_decode_init(), g723_1_decode_init(), gsm_init(), has_codec_parameters(), hcom_init(), ilbc_decode_init(), imc_decode_init(), init_converted_samples(), init_fifo(), init_filter(), init_filters(), init_output_frame(), init_output_stream_encode(), init_resampler(), 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(), mf_a_avframe_to_sample(), mf_enca_input_adjust(), mf_enca_input_score(), mlp_encode_init(), mlp_parse(), mp3lame_encode_frame(), mp3lame_encode_init(), mpc7_decode_init(), mpc8_decode_init(), new_audio_stream(), oggvorbis_decode_init(), on2avc_decode_init(), open_output_file(), opus_decode_init(), output_data(), paf_audio_init(), pcm_bluray_decode_frame(), pcm_bluray_parse_header(), pcm_decode_init(), pcm_dvd_encode_frame(), pcm_dvd_encode_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(), run_test(), s302m_encode_init(), s302m_parse_frame_header(), sbc_decode_init(), set_bps_params(), sipr_decoder_init(), siren_init(), smka_decode_frame(), smka_decode_init(), spawn_empty_frame(), speex_decode_init(), 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(), wma_decode_init(), ws_snd_decode_init(), and xma_decode_init().

◆ frame_size

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
transcode_aac.c.

Definition at line 1012 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(), av_get_audio_frame_duration(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), cng_decode_frame(), cng_decode_init(), cng_encode_init(), configure_filtergraph(), decode_frame(), decoder_init(), dprint_compression_options(), encode_frame(), encode_init(), encode_send_frame_internal(), fdk_aac_decode_frame(), ff_ac3_encode_init(), ff_aptx_init(), ffat_create_decoder(), ffat_decode(), ffat_encode(), ffat_init_encoder(), ffat_update_ctx(), flac_encode_init(), 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(), 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(), mlp_encode_frame(), mlp_encode_init(), mlp_parse(), mp3lame_encode_frame(), mp3lame_encode_init(), MPA_encode_init(), opus_encode_init(), pcm_dvd_encode_init(), pcm_encode_init(), print_enc_params(), 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(), and wavpack_encode_init().

◆ frame_number

int AVCodecContext::frame_number

◆ block_align

int AVCodecContext::block_align

◆ cutoff

int AVCodecContext::cutoff

Audio cutoff bandwidth (0 means "automatic")

  • encoding: Set by user.
  • decoding: unused

Definition at line 1036 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().

◆ channel_layout

uint64_t AVCodecContext::channel_layout

Audio channel layout.

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

Definition at line 1043 of file avcodec.h.

Referenced by aac_encode_init(), ac3_decode_frame(), alac_decode_init(), amr_parse(), 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(), dolby_e_parse(), 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_encode_preinit(), 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(), ilbc_decode_init(), imc_decode_init(), 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(), metasound_decode_init(), mlp_encode_init(), mlp_parse(), mpc7_decode_init(), mpc8_decode_init(), on2avc_decode_init(), 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(), siren_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(), ws_snd_decode_init(), and xma_decode_init().

◆ request_channel_layout

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 1050 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(), output_configure(), and read_restart_header().

◆ audio_service_type

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 1057 of file avcodec.h.

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

◆ request_sample_fmt

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 1065 of file avcodec.h.

Referenced by decode_init(), and libopus_decode_init().

◆ get_buffer2

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, 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 1147 of file avcodec.h.

Referenced by ff_decode_preinit(), ff_get_buffer(), submit_packet(), and update_context_from_user().

◆ qcompress

float AVCodecContext::qcompress

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

Definition at line 1150 of file avcodec.h.

Referenced by aom_init(), libx265_encode_init(), vpx_init(), X264_init(), and XAVS_init().

◆ qblur

float AVCodecContext::qblur

amount of qscale smoothing over time (0.0-1.0)

Definition at line 1151 of file avcodec.h.

Referenced by libx265_encode_init(), X264_init(), and XAVS_init().

◆ qmin

int AVCodecContext::qmin

◆ qmax

int AVCodecContext::qmax

◆ max_qdiff

int AVCodecContext::max_qdiff

maximum quantizer difference between frames

  • encoding: Set by user.
  • decoding: unused

Definition at line 1172 of file avcodec.h.

Referenced by libx265_encode_init(), X264_init(), and XAVS_init().

◆ rc_buffer_size

int AVCodecContext::rc_buffer_size

◆ rc_override_count

int AVCodecContext::rc_override_count

ratecontrol override, see RcOverride

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

Definition at line 1186 of file avcodec.h.

Referenced by new_video_stream().

◆ rc_override

RcOverride* AVCodecContext::rc_override

Definition at line 1187 of file avcodec.h.

Referenced by avcodec_free_context(), and new_video_stream().

◆ rc_max_rate

int64_t AVCodecContext::rc_max_rate

◆ rc_min_rate

int64_t AVCodecContext::rc_min_rate

minimum bitrate

  • encoding: Set by user.
  • decoding: unused

Definition at line 1201 of file avcodec.h.

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

◆ rc_max_available_vbv_use

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 1208 of file avcodec.h.

Referenced by ff_mpv_encode_picture().

◆ rc_min_vbv_overflow_use

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 1215 of file avcodec.h.

◆ rc_initial_buffer_occupancy

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 1222 of file avcodec.h.

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

◆ trellis

int AVCodecContext::trellis

trellis RD quantization

  • encoding: Set by user.
  • decoding: unused

Definition at line 1229 of file avcodec.h.

Referenced by adpcm_compress_trellis(), adpcm_encode_init(), ff_mpv_encode_init(), ff_mpv_encode_picture(), g722_encode_init(), init_video_param(), X264_init(), XAVS_init(), and xvid_encode_init().

◆ stats_out

char* AVCodecContext::stats_out

◆ stats_in

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 1244 of file avcodec.h.

Referenced by aom_init(), encode_init(), librav1e_encode_init(), new_video_stream(), submit_stats(), transcode(), vpx_init(), and xvid_encode_init().

◆ workaround_bugs

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 1251 of file avcodec.h.

Referenced by ff_mpv_decode_init(), and h264_init_context().

◆ strict_std_compliance

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 1280 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(), dvbsub_parse_clut_segment(), encode_frame(), encode_init(), ff_dnxhd_find_cid(), ff_h264_decode_seq_parameter_set(), ff_mjpeg_encode_check_pix_fmt(), ff_mpv_encode_init(), hwaccel_init(), init_video_param(), libgsm_encode_init(), open_output_file(), set_default_channel_config(), and vc2_encode_init().

◆ error_concealment

int AVCodecContext::error_concealment

error concealment flags

  • encoding: unused
  • decoding: Set by user.

Definition at line 1292 of file avcodec.h.

Referenced by dv_decode_video_segment(), and ff_vp56_decode_mbs().

◆ debug

int AVCodecContext::debug

◆ err_recognition

int AVCodecContext::err_recognition

◆ reordered_opaque

int64_t AVCodecContext::reordered_opaque

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

  • encoding: Set by libavcodec to the reordered_opaque of the input frame corresponding to the last returned packet. Only supported by encoders with the AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability.
  • decoding: Set by user.

Definition at line 1352 of file avcodec.h.

Referenced by ff_decode_frame_props(), libx265_encode_frame(), and update_context_from_user().

◆ hwaccel

const struct AVHWAccel* AVCodecContext::hwaccel

◆ hwaccel_context

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.

  • encoding: unused
  • decoding: Set by user

Definition at line 1370 of file avcodec.h.

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

◆ error

uint64_t AVCodecContext::error[AV_NUM_DATA_POINTERS]

error

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

Definition at line 1377 of file avcodec.h.

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

◆ dct_algo

int AVCodecContext::dct_algo

DCT algorithm, see FF_DCT_* below.

  • encoding: Set by user.
  • decoding: unused

Definition at line 1384 of file avcodec.h.

Referenced by avcodec_dct_init(), cri_decode_init(), ff_fdctdsp_init(), ff_fdctdsp_init_ppc(), ff_fdctdsp_init_x86(), tdsc_init(), and tiff_init().

◆ idct_algo

int AVCodecContext::idct_algo

◆ bits_per_coded_sample

int AVCodecContext::bits_per_coded_sample

◆ bits_per_raw_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 1425 of file avcodec.h.

Referenced by alac_decode_init(), alac_encode_frame(), alac_encode_init(), ape_decode_init(), avcodec_dct_init(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), cfhd_decode(), checkasm_check_pixblockdsp(), cllc_decode_frame(), cri_decode_frame(), decode_channel(), decode_frame(), decode_frame_header(), decode_init(), decode_slice_thread(), dnxhd_encode_init(), encode_init(), ff_dca_lbr_filter_frame(), ff_dca_xll_filter_frame(), ff_encode_preinit(), ff_fdctdsp_init(), ff_flac_parse_streaminfo(), ff_idctdsp_init(), ff_idctdsp_init_mips(), ff_idctdsp_init_x86(), ff_mpegvideoencdsp_init_x86(), ff_mpv_encode_init(), ff_pixblockdsp_init(), ff_pixblockdsp_init_mips(), ff_proresdsp_init(), ff_proresdsp_init_x86(), ff_xvid_idct_init(), ffat_create_decoder(), ffat_init_encoder(), fic_decode_init(), filter_frame_fixed(), filter_frame_float(), flac_encode_frame(), flac_encode_init(), h263_get_format(), hqx_decode_frame(), init_output_stream_encode(), libopenjpeg_decode_frame(), mlp_encode_init(), mlp_parse(), 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_major_sync(), read_var_block_data(), 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(), v410_decode_init(), vble_decode_init(), wavpack_decode_block(), y216_decode_init(), y41p_decode_init(), zero12v_decode_init(), and zerocodec_decode_init().

◆ lowres

int AVCodecContext::lowres

◆ thread_count

int AVCodecContext::thread_count

◆ thread_type

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 1450 of file avcodec.h.

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

◆ active_thread_type

int AVCodecContext::active_thread_type

◆ thread_safe_callbacks

attribute_deprecated 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.

    Deprecated:
    the custom get_buffer2() callback should always be thread-safe. Thread-unsafe get_buffer2() implementations will be invalid starting with LIBAVCODEC_VERSION_MAJOR=60; in other words, libavcodec will behave as if this field was always set to 1. Callers that want to be forward compatible with future libavcodec versions should wrap access to this field in if LIBAVCODEC_VERSION_MAJOR < 60

Definition at line 1479 of file avcodec.h.

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

◆ execute

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 1491 of file avcodec.h.

Referenced by decode_chunks(), decode_component(), decode_frame(), decode_lowdelay(), dvvideo_decode_frame(), encode_frame(), ff_h264_execute_decode_slices(), ff_slice_thread_init(), and fic_decode_frame().

◆ execute2

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 1511 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(), dxv_decode(), encode_frame(), ff_slice_thread_init(), ff_vp56_decode_frame(), hap_decode(), hqx_decode_frame(), jpeg2000_decode_frame(), magy_decode_frame(), v410_decode_frame(), vp78_decode_frame(), and wavpack_decode_frame().

◆ nsse_weight

int AVCodecContext::nsse_weight

noise vs.

sse weight for the nsse comparison function

  • encoding: Set by user.
  • decoding: unused

Definition at line 1518 of file avcodec.h.

◆ profile

int AVCodecContext::profile

profile

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

Definition at line 1525 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(), avcodec_parameters_from_context(), avcodec_parameters_to_context(), avcodec_string(), config_enc_params(), dca_parse(), decode_extension_payload(), decode_frame_header(), decode_init(), dirac_decode_data_unit(), dnxhd_encode_init(), dnxhd_find_hr_cid(), dxva_check_codec_compatibility(), 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(), ffat_create_decoder(), ffat_init_encoder(), hevc_parse_slice_header(), libaribb24_generate_ass_header(), libaribb24_handle_regions(), libaribb24_init(), mf_encv_output_adjust(), 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_context(), read_colorspace_details(), read_sbr_extension(), sbc_encode_init(), set_context_with_sequence(), set_pix_fmt(), svc_decode_frame(), svc_encode_init(), 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_mpeg2_init_sequence_params(), vaapi_encode_profile_entrypoint(), vaapi_hevc_decode_slice(), vaapi_hevc_end_frame(), vaapi_hevc_start_frame(), vc1_decode_init(), vdpau_h264_init(), vdpau_hevc_init(), vdpau_mpeg4_init(), vdpau_vc1_init(), vdpau_vp9_init(), vpx_init(), and X264_init().

◆ level

int AVCodecContext::level

◆ skip_loop_filter

enum AVDiscard AVCodecContext::skip_loop_filter

Skip loop filtering for selected frames.

  • encoding: unused
  • decoding: Set by user.

Definition at line 1659 of file avcodec.h.

Referenced by decode_wmv9(), ff_vc1_decode_entry_point(), ff_vc1_decode_sequence_header(), update_context_from_user(), and vp78_decode_frame().

◆ skip_idct

enum AVDiscard AVCodecContext::skip_idct

Skip IDCT/dequantization for selected frames.

  • encoding: unused
  • decoding: Set by user.

Definition at line 1666 of file avcodec.h.

Referenced by update_context_from_user().

◆ skip_frame

enum AVDiscard AVCodecContext::skip_frame

◆ subtitle_header

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 1683 of file avcodec.h.

Referenced by ass_decode_init(), ass_encode_init(), avcodec_close(), avcodec_free_context(), ff_ass_subtitle_header_full(), ff_decode_preinit(), init_output_stream(), libaribb24_generate_ass_header(), mov_text_encode_init(), my_ass_subtitle_header(), srt_encode_init(), ttml_encode_init(), and webvtt_encode_init().

◆ subtitle_header_size

int AVCodecContext::subtitle_header_size

◆ initial_padding

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 1701 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_init(), encode_superframe(), ff_ac3_encode_frame_common_end(), ff_ac3_encode_init(), ff_af_queue_init(), ffat_update_ctx(), 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(), twolame_encode_init(), and vorbis_encode_init().

◆ framerate

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
transcoding.c, vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1710 of file avcodec.h.

Referenced by amf_encode_init_h264(), amf_encode_init_hevc(), av1_parser_parse(), av1_read_header(), av_guess_frame_rate(), avcodec_open2(), avformat_find_stream_info(), compute_frame_duration(), config_enc_params(), cri_decode_frame(), cuvid_output_frame(), davs2_dump_frames(), dec_enc(), decode_frame(), decode_sequence_header_adv(), decode_simple_internal(), dirac_decode_data_unit(), dvvideo_decode_frame(), encode_frame(), export_stream_params(), ff_guess_coded_bitrate(), ff_raw_video_read_header(), ffmal_update_format(), h264_parse(), hevc_parse_slice_header(), init_output_stream_encode(), init_video_param(), init_video_param_jpeg(), libkvazaar_init(), librav1e_encode_init(), libuavs3d_decode_frame(), libx265_encode_init(), main(), mf_encv_output_adjust(), mpeg_decode_postinit(), mpegvideo_extract_headers(), mpegvideo_parse(), nvenc_setup_encoder(), omx_component_init(), open_input_file(), open_output_file(), parse_avs3_nal_units(), parse_nal_units(), prepare_sei_data_array(), set_context_with_sequence(), svc_encode_init(), 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_encode_mpeg2_init_sequence_params(), vaapi_mpeg4_start_frame(), vc1_extract_header(), X264_init(), and xavs2_init().

◆ sw_pix_fmt

enum AVPixelFormat AVCodecContext::sw_pix_fmt

◆ pkt_timebase

AVRational AVCodecContext::pkt_timebase

◆ codec_descriptor

const AVCodecDescriptor* AVCodecContext::codec_descriptor

AVCodecDescriptor.

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

Definition at line 1731 of file avcodec.h.

Referenced by avcodec_decode_subtitle2(), avcodec_open2(), ff_decode_preinit(), and ff_encode_preinit().

◆ pts_correction_num_faulty_pts

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 1738 of file avcodec.h.

Referenced by ff_decode_preinit().

◆ pts_correction_num_faulty_dts

int64_t AVCodecContext::pts_correction_num_faulty_dts

Number of incorrect PTS values so far.

Definition at line 1739 of file avcodec.h.

Referenced by ff_decode_preinit().

◆ pts_correction_last_pts

int64_t AVCodecContext::pts_correction_last_pts

Number of incorrect DTS values so far.

Definition at line 1740 of file avcodec.h.

Referenced by avcodec_flush_buffers(), and ff_decode_preinit().

◆ pts_correction_last_dts

int64_t AVCodecContext::pts_correction_last_dts

PTS of the last frame.

Definition at line 1741 of file avcodec.h.

Referenced by avcodec_flush_buffers(), and ff_decode_preinit().

◆ sub_charenc

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 1748 of file avcodec.h.

Referenced by ff_decode_preinit(), and recode_subtitle().

◆ sub_charenc_mode

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 1756 of file avcodec.h.

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

◆ skip_alpha

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 1774 of file avcodec.h.

Referenced by decode_frame_header(), and ff_vp56_init_context().

◆ seek_preroll

int AVCodecContext::seek_preroll

Number of samples to skip after a discontinuity.

  • decoding: unused
  • encoding: set by libavcodec

Definition at line 1781 of file avcodec.h.

Referenced by avcodec_parameters_from_context(), and avcodec_parameters_to_context().

◆ debug_mv

attribute_deprecated int AVCodecContext::debug_mv
Deprecated:
unused

Definition at line 1788 of file avcodec.h.

◆ chroma_intra_matrix

uint16_t* AVCodecContext::chroma_intra_matrix

custom intra quantization matrix

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

Definition at line 1799 of file avcodec.h.

Referenced by new_video_stream().

◆ dump_separator

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 1807 of file avcodec.h.

Referenced by avcodec_string().

◆ codec_whitelist

char* AVCodecContext::codec_whitelist

',' separated list of allowed decoders.

If NULL then all are allowed

  • encoding: unused
  • decoding: set by user

Definition at line 1815 of file avcodec.h.

Referenced by avcodec_open2().

◆ properties

unsigned AVCodecContext::properties

Properties of the stream that gets decoded.

  • encoding: unused
  • decoding: set by libavcodec

Definition at line 1822 of file avcodec.h.

Referenced by avcodec_string(), decode_frame_header(), dump_stream_format(), export_stream_params_from_sei(), mpeg_decode_a53_cc(), set_context_with_sequence(), show_stream(), update_context_from_thread(), and webp_decode_frame().

◆ coded_side_data

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 1833 of file avcodec.h.

Referenced by add_coded_side_data(), avcodec_close(), ff_add_cpb_side_data(), and init_output_stream().

◆ nb_coded_side_data

int AVCodecContext::nb_coded_side_data

◆ hw_frames_ctx

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
vaapi_encode.c, and vaapi_transcode.c.

Definition at line 1858 of file avcodec.h.

Referenced by amf_init_context(), avcodec_close(), avcodec_default_get_buffer2(), cuvid_decode_init(), dec_enc(), ff_decode_get_hw_frames_ctx(), ff_dxva2_decode_init(), ff_encode_preinit(), ff_frame_thread_encoder_init(), 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(), hw_device_setup_for_encode(), hwaccel_uninit(), init_video_param(), init_video_param_jpeg(), main(), nvenc_setup_device(), qsv_decode_init_context(), qsv_decode_preinit(), qsvenc_init_session(), and update_context_from_thread().

◆ sub_text_format

attribute_deprecated int AVCodecContext::sub_text_format
Deprecated:
unused

Definition at line 1865 of file avcodec.h.

◆ trailing_padding

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 1878 of file avcodec.h.

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

◆ max_pixels

int64_t AVCodecContext::max_pixels

◆ hw_device_ctx

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
qsvdec.c, and vaapi_transcode.c.

Definition at line 1908 of file avcodec.h.

Referenced by amf_init_context(), avcodec_close(), avcodec_default_get_format(), cuvid_decode_init(), ff_decode_get_hw_frames_ctx(), ff_get_format(), ff_mediacodec_dec_init(), hw_device_setup_for_encode(), main(), nvdec_init_hwframes(), nvenc_setup_device(), open_input_file(), qsv_decode_preinit(), and qsvenc_init_session().

◆ hwaccel_flags

int AVCodecContext::hwaccel_flags

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

Definition at line 1917 of file avcodec.h.

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

◆ apply_cropping

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 1944 of file avcodec.h.

Referenced by apply_cropping().

◆ extra_hw_frames

int AVCodecContext::extra_hw_frames

Definition at line 1958 of file avcodec.h.

Referenced by avcodec_get_hw_frames_parameters(), and qsv_decode_preinit().

◆ discard_damaged_percentage

int AVCodecContext::discard_damaged_percentage

The percentage of damaged samples to discard a frame.

  • decoding: set by user
  • encoding: unused

Definition at line 1966 of file avcodec.h.

Referenced by cinvideo_decode_frame(), decode_frame(), decode_frame_common(), dxtory_decode_v2(), hqx_decode_frame(), paf_video_decode(), qtrle_decode_frame(), and rscc_decode_frame().

◆ max_samples

int64_t AVCodecContext::max_samples

The number of samples per frame to maximally accept.

  • decoding: set by user
  • encoding: set by user

Definition at line 1974 of file avcodec.h.

Referenced by decode_simple_receive_frame(), and ff_get_buffer().

◆ export_side_data

int AVCodecContext::export_side_data

Bit set of AV_CODEC_EXPORT_DATA_* flags, which affects the kind of metadata exported in frame, packet, or coded stream side data by decoders and encoders.

  • decoding: set by user
  • encoding: set by user

Definition at line 1984 of file avcodec.h.

Referenced by alloc_picture_tables(), ff_decode_preinit(), ff_print_debug_info2(), fill_picture_parameters(), nvdec_av1_start_frame(), set_output_frame(), update_block_buffers(), update_context_from_user(), vaapi_av1_start_frame(), and vp9_decode_frame().

◆ get_encode_buffer

int(* AVCodecContext::get_encode_buffer) (struct AVCodecContext *s, AVPacket *pkt, int flags)

This callback is called at the beginning of each packet to get a data buffer for it.

The following field will be set in the packet before this callback is called:

  • size This callback must use the above value to calculate the required buffer size, which must padded by at least AV_INPUT_BUFFER_PADDING_SIZE bytes.

In some specific cases, the encoder may not use the entire buffer allocated by this callback. This will be reflected in the size value in the packet once returned by avcodec_receive_packet().

This callback must fill the following fields in the packet:

If AV_CODEC_CAP_DR1 is not set then get_encode_buffer() must call avcodec_default_get_encode_buffer() instead of providing a buffer allocated by some other means.

The flags field may contain a combination of AV_GET_ENCODE_BUFFER_FLAG_ flags. They may be used for example to hint what use the buffer may get after being created. Implementations of this callback may ignore flags they don't understand. If AV_GET_ENCODE_BUFFER_FLAG_REF is set in flags then the packet may be reused (read and/or written to if it is writable) later by libavcodec.

This callback must be thread-safe, as when frame threading is used, it may be called from multiple threads simultaneously.

See also
avcodec_default_get_encode_buffer()
  • encoding: Set by libavcodec, user can override.
  • decoding: unused

Definition at line 2026 of file avcodec.h.

Referenced by ff_get_encode_buffer().


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