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Data Fields
AVStream Struct Reference

Stream structure. More...

#include <avformat.h>

Data Fields

int index
 stream index in AVFormatContext
 
int id
 Format-specific stream ID.
 
AVCodecContextcodec
 Codec context associated with this stream.
 
voidpriv_data
 
struct AVFrac pts
 encoding: pts generation when outputting stream
 
AVRational time_base
 This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
 
int64_t start_time
 Decoding: pts of the first frame of the stream in presentation order, in stream time base.
 
int64_t duration
 Decoding: duration of the stream, in stream time base.
 
int64_t nb_frames
 number of frames in this stream if known or 0
 
int disposition
 AV_DISPOSITION_* bit field.
 
enum AVDiscard discard
 Selects which packets can be discarded at will and do not need to be demuxed.
 
AVRational sample_aspect_ratio
 sample aspect ratio (0 if unknown)
 
AVDictionarymetadata
 
AVRational avg_frame_rate
 Average framerate.
 
AVPacket attached_pic
 For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached picture.
 
struct {
   int64_t   last_dts
 
   int64_t   duration_gcd
 
   int   duration_count
 
   double(*   duration_error )[2][MAX_STD_TIMEBASES]
 
   int64_t   codec_info_duration
 
   int64_t   codec_info_duration_fields
 
   int   found_decoder
 
   int64_t   last_duration
 
   int64_t   fps_first_dts
 Those are used for average framerate estimation.
 
   int   fps_first_dts_idx
 
   int64_t   fps_last_dts
 
   int   fps_last_dts_idx
 
info
 
int pts_wrap_bits
 number of bits in pts (used for wrapping control)
 
int64_t reference_dts
 Timestamp corresponding to the last dts sync point.
 
int64_t first_dts
 
int64_t cur_dts
 
int64_t last_IP_pts
 
int last_IP_duration
 
int probe_packets
 
int codec_info_nb_frames
 Number of frames that have been demuxed during av_find_stream_info()
 
enum AVStreamParseType need_parsing
 
struct AVCodecParserContextparser
 
struct AVPacketListlast_in_packet_buffer
 last packet in packet_buffer for this stream when muxing.
 
AVProbeData probe_data
 
int64_t pts_buffer [MAX_REORDER_DELAY+1]
 
AVIndexEntryindex_entries
 Only used if the format does not support seeking natively.
 
int nb_index_entries
 
unsigned int index_entries_allocated_size
 
AVRational r_frame_rate
 Real base framerate of the stream.
 
int stream_identifier
 Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.
 
int64_t interleaver_chunk_size
 
int64_t interleaver_chunk_duration
 
int request_probe
 stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with request_probe being the minimum score to accept.
 
int skip_to_keyframe
 Indicates that everything up to the next keyframe should be discarded.
 
int skip_samples
 Number of samples to skip at the start of the frame decoded from the next packet.
 
int nb_decoded_frames
 Number of internally decoded frames, used internally in libavformat, do not access its lifetime differs from info which is why it is not in that structure.
 
int64_t mux_ts_offset
 Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.
 
int64_t pts_wrap_reference
 Internal data to check for wrapping of the time stamp.
 
int pts_wrap_behavior
 Options for behavior, when a wrap is detected.
 

Detailed Description

Stream 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. sizeof(AVStream) must not be used outside libav*.

Examples:
doc/examples/demuxing.c, and doc/examples/muxing.c.

Definition at line 659 of file avformat.h.

Field Documentation

int AVStream::index

stream index in AVFormatContext

Examples:
doc/examples/muxing.c.

Definition at line 660 of file avformat.h.

Referenced by aac_parse_packet(), add_av_stream1(), amr_handle_packet(), ape_tag_read_field(), asf_read_picture(), av_read_frame(), avformat_find_stream_info(), avformat_match_stream_specifier(), avformat_new_stream(), avpriv_dv_produce_packet(), avpriv_set_pts_info(), avs_read_audio_packet(), avs_read_video_packet(), build_feed_streams(), cdxl_read_packet(), check_output_constraints(), cin_read_header(), compute_pkt_fields2(), configure_input_audio_filter(), configure_input_video_filter(), dc1394_read_common(), decode_audio(), decode_video(), dshow_add_device(), dump_attachment(), dv_extract_audio_info(), ea_read_header(), ff_flac_parse_picture(), ff_h263_handle_packet(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_rtsp_open_transport_ctx(), film_read_header(), flv_data_packet(), flv_read_packet(), get_attachment(), get_ost_filters(), get_subtitle_pkt(), guess_input_channel_layout(), gxf_write_header(), gxf_write_media_preamble(), h263_handle_packet(), h264_handle_packet(), idcin_read_header(), init_input_filter(), init_input_stream(), ipmovie_read_header(), jpeg_parse_packet(), latm_parse_packet(), matroska_parse_frame(), matroska_parse_rm_audio(), mov_build_index(), mov_read_covr(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), movie_common_init(), movie_push_frame(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_set_stream_info(), mxf_parse_structural_metadata(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_packet(), mxf_write_sequence(), mxf_write_structural_component(), mxf_write_timecode_component(), mxf_write_track(), new_audio_stream(), new_pes_packet(), nsv_read_chunk(), nuv_header(), open_input_file(), parse_packet(), parse_strk(), parse_vtrk(), pmt_cb(), probe_codec(), process_input(), qdm2_restore_block(), qt_rtp_parse_packet(), rdt_load_mdpr(), rdt_parse_packet(), rdt_parse_sdp_line(), read_frame(), read_frame_internal(), return_stored_frame(), roq_read_packet(), rtp_parse_packet_internal(), seq_read_header(), show_stream(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), store_packet(), str_read_packet(), svq3_parse_packet(), thp_read_header(), vid_read_packet(), vmd_read_header(), vp8_handle_packet(), wc3_read_header(), write_audio_frame(), write_frame(), write_stream_data(), write_video_frame(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), xa_read_packet(), xiph_handle_packet(), and xmv_read_header().

int AVStream::id
AVCodecContext* AVStream::codec

Codec context associated with this stream.

Allocated and freed by libavformat.

  • decoding: The demuxer exports codec information stored in the headers here.
  • encoding: The user sets codec information, the muxer writes it to the output. Mandatory fields as specified in AVCodecContext documentation must be set even if this AVCodecContext is not actually used for encoding.
Examples:
doc/examples/demuxing.c, doc/examples/filtering_audio.c, doc/examples/filtering_video.c, and doc/examples/muxing.c.

Definition at line 678 of file avformat.h.

Referenced by a64_write_header(), add_av_stream(), add_av_stream1(), add_codec(), add_dstream(), add_input_streams(), add_stream(), adp_read_header(), adts_aac_read_header(), adts_write_header(), adx_read_header(), adx_read_packet(), aea_read_header(), aea_read_packet(), afc_read_header(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_packet(), aiff_write_trailer(), amf_parse_object(), amr_handle_packet(), amr_read_header(), amr_read_packet(), apc_read_header(), ape_read_header(), ape_tag_read_field(), aqt_read_header(), asf_parse_packet(), asf_read_header(), asf_read_picture(), asf_read_stream_properties(), asf_write_header1(), asf_write_packet(), asfrtp_parse_sdp_line(), ass_read_header(), ast_read_header(), ast_read_packet(), ast_write_header(), ast_write_packet(), ast_write_trailer(), audio_decode_frame(), audio_read_header(), audio_write_header(), av_find_best_stream(), av_find_default_stream_index(), av_guess_frame_rate(), av_guess_sample_aspect_ratio(), av_interleaved_write_frame(), avformat_find_stream_info(), avformat_match_stream_specifier(), avformat_new_stream(), avi_read_header(), avi_read_idx1(), avi_read_seek(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avisynth_read_packet(), avisynth_read_seek(), avpriv_dv_init_demux(), avpriv_dv_produce_packet(), avpriv_set_pts_info(), avr_read_header(), avs_read_packet(), bfi_read_header(), bmv_read_header(), build_feed_streams(), build_file_streams(), build_frame_code(), caca_write_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cdata_read_header(), cdxl_read_packet(), celt_header(), check_keyboard_interaction(), check_recording_time(), choose_decoder(), choose_encoder(), choose_pix_fmts(), choose_pixel_fmt(), choose_sample_fmt(), cin_read_header(), close_audio(), close_connection(), close_input_file(), close_output_stream(), close_video(), compute_bandwidth(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), concat_read_header(), configure_input_audio_filter(), configure_input_video_filter(), configure_output_audio_filter(), configure_output_video_filter(), create_audio_stream(), create_new_audio_stream(), create_stream(), daud_header(), daud_write_header(), dc1394_read_common(), decode_audio(), decode_stream_header(), decode_video(), dfa_read_header(), dirac_header(), do_audio_out(), do_streamcopy(), do_subtitle_out(), do_video_out(), do_video_stats(), dshow_add_device(), dtshd_read_header(), dump_attachment(), dump_stream_format(), dv_assemble_frame(), dv_extract_audio_info(), dv_extract_video_info(), dv_frame_offset(), dv_init_mux(), dxa_read_header(), ea_read_header(), epaf_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), export_orphan_timecode(), extract_mpeg4_header(), fbdev_read_header(), ff_alsa_open(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_choose_timebase(), ff_compute_frame_duration(), ff_dv_offset_reset(), ff_flac_parse_picture(), ff_framehash_write_header(), ff_free_stream(), ff_generate_avci_extradata(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_load_image(), ff_mov_read_chan(), ff_mov_read_stsd_entries(), ff_mp4_read_dec_config_descr(), ff_parse_mpeg2_descriptor(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_read_mdpr_codecdata(), ff_rm_retrieve_cache(), ff_rtp_chain_mux_open(), ff_rtp_parse_open(), ff_rtp_send_aac(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_sauce_read(), ff_spdif_read_packet(), ff_voc_get_packet(), ffm2_read_header(), ffm_close(), ffm_read_header(), ffm_write_header(), film_read_header(), filter_codec_opts(), find_stream(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_write_header(), flac_write_trailer(), flush_encoders(), flv_data_packet(), flv_get_extradata(), flv_read_metabody(), flv_read_packet(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), force_codec_ids(), frm_read_header(), frm_read_packet(), g722_read_header(), g723_1_init(), g729_read_header(), g729_read_packet(), get_aiff_header(), get_attachment(), get_codec_data(), get_ost_filters(), get_packet_header(), get_private_data(), get_sindex(), get_video_frame(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), guess_channel_layout(), guess_input_channel_layout(), gxf_compare_field_nb(), gxf_find_lines_index(), gxf_interleave_packet(), gxf_packet(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_mpeg_auxiliary(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), handle_file(), has_codec_parameters(), has_decode_delay_been_guessed(), hls_mux_init(), hls_read_header(), hls_write_header(), hls_write_packet(), http_prepare_data(), http_receive_data(), ico_write_header(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), iff_read_header(), iff_read_packet(), ilbc_parse_fmtp(), ilbc_parse_sdp_line(), ilbc_read_header(), ilbc_read_packet(), ilbc_write_header(), img_read_header(), img_read_packet(), init_input_filter(), init_input_stream(), init_muxer(), init_pts(), init_stream(), insert_trim(), interleave_compare_dts(), ipmovie_read_header(), ircam_read_header(), ircam_write_header(), ism_write_header(), ism_write_packet(), iss_read_header(), iss_read_packet(), ivf_write_header(), jacosub_read_header(), jacosub_write_header(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), lavfi_read_header(), libquvi_read_header(), lmlm4_read_header(), loas_read_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), main(), matroska_parse_block(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_parse_wavpack(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tracks(), mmf_read_header(), modify_current_stream(), modplug_read_header(), mov_build_index(), mov_create_timecode_track(), mov_read_ares(), mov_read_close(), mov_read_covr(), mov_read_dac3(), mov_read_dec3(), mov_read_dvc1(), mov_read_enda(), mov_read_extradata(), mov_read_fiel(), mov_read_glbl(), mov_read_hdlr(), mov_read_header(), mov_read_strf(), mov_read_trak(), mov_read_trun(), mov_read_wave(), mov_read_wfex(), mov_write_ftyp_tag(), mov_write_header(), mov_write_moov_tag(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_common_init(), movie_config_output_props(), movie_push_frame(), movie_query_formats(), movie_uninit(), mp3_parse_vbr_tags(), mp3_read_header(), mp3_write_xing(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpeg_mux_write_packet(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), mtv_read_header(), mv_read_header(), mxf_get_d10_aes3_packet(), mxf_handle_small_eubc(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_seek(), mxf_write_cdci_common(), mxf_write_common_fields(), mxf_write_d10_audio_packet(), mxf_write_d10_video_packet(), mxf_write_generic_sound_common(), mxf_write_header(), mxf_write_identification(), mxf_write_mpegvideo_desc(), mxf_write_packet(), mxf_write_wav_common(), mxg_read_header(), nc_read_header(), new_audio_stream(), new_output_stream(), new_stream(), new_subtitle_stream(), new_video_stream(), nist_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nut_read_header(), nut_write_header(), nuv_header(), ogg_buffer_data(), ogg_read_seek(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_header(), oma_read_packet(), oma_write_header(), open_audio(), open_codec_context(), open_input_file(), open_input_stream(), open_output_file(), open_slave(), open_stream(), open_video(), opt_map_channel(), opt_target(), opus_header(), output_packet(), parse_audio_var(), parse_fmtp(), parse_fmtp_config(), parse_h264_sdp_line(), parse_media_type(), parse_mpeg1waveformatex(), parse_packet(), parse_strk(), parse_timecode_in_framenum_format(), parse_video_var(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pmt_cb(), prepare_sdp_description(), print_report(), probe_codec(), process_frame(), process_input(), pulse_read_header(), put_frame(), pva_read_header(), pvf_read_header(), qcp_read_header(), qdm2_parse_config(), qdm2_parse_packet(), qt_rtp_parse_packet(), r3d_read_red1(), r3d_read_reda(), rawvideo_read_header(), rawvideo_read_packet(), rdt_parse_packet(), read_desc_chunk(), read_ffserver_streams(), read_frame(), read_frame_internal(), read_gab2_sub(), read_header(), read_header_gme(), read_index(), read_kuki_chunk(), read_packet(), read_seek(), real_parse_asm_rule(), realtext_read_header(), reap_filters(), redspark_read_header(), redspark_read_packet(), report_new_stream(), rewind_file(), rl2_read_header(), rm_ac3_swap_bytes(), rm_read_audio_stream_info(), rm_read_dts(), rm_read_header(), rm_write_header(), rm_write_packet(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rsd_read_header(), rsd_read_packet(), rso_read_header(), rso_write_header(), rtp_parse_one_packet(), rtp_parse_packet_internal(), rtp_parse_queued_packet(), rtp_send_ilbc(), rtp_write_header(), rtp_write_packet(), sami_read_header(), sap_fetch_packet(), sap_read_header(), sbg_read_header(), sbg_read_packet(), sdl_write_header(), sdl_write_packet(), sdp_parse_fmtp_config_h264(), seek_frame_generic(), seg_write_header(), segment_mux_init(), select_reference_stream(), seq_read_header(), set_channels(), set_codec_from_probe_data(), setup_find_stream_info_opts(), show_frame(), show_packet(), show_stream(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), smjpeg_write_header(), smjpeg_write_packet(), smush_read_header(), sol_read_header(), sox_read_header(), sox_write_header(), sox_write_trailer(), spdif_write_header(), speex_header(), srt_read_header(), srt_write_header(), srt_write_packet(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), sub2video_update(), subtitle_thread(), subviewer1_read_header(), subviewer_read_header(), svq3_parse_packet(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), tak_read_header(), tedcaptions_read_header(), theora_header(), thp_read_header(), tmcd_is_referenced(), tmv_read_header(), transcode(), transcode_init(), transcode_subtitles(), try_decode_frame(), tta_read_header(), txd_read_header(), update_initial_durations(), update_initial_timestamps(), update_stream_timings(), v4l2_read_header(), v4l2_read_packet(), validate_codec_tag(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_packet(), video_refresh(), video_thread(), vivo_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), voc_write_packet(), vorbis_header(), vplayer_read_header(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), webvtt_read_header(), write_audio_frame(), write_frame(), write_header(), write_manifest(), write_packet(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_streamheader(), write_streaminfo(), write_timestamp(), write_trailer(), write_video_frame(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_header(), wv_write_header(), x11grab_read_header(), xa_read_header(), xa_read_packet(), xiph_parse_fmtp_pair(), xmv_process_packet_header(), xmv_read_header(), xv_write_header(), xv_write_packet(), xwma_read_header(), xwma_read_packet(), yop_read_header(), yuv4_read_header(), and yuv4_read_packet().

void* AVStream::priv_data

Definition at line 679 of file avformat.h.

Referenced by add_av_stream1(), asf_parse_packet(), asf_read_pts(), asf_read_stream_properties(), asf_reset_header(), av_write_trailer(), avi_read_close(), avi_read_header(), avi_read_idx1(), avi_read_packet(), avi_read_seek(), avi_start_new_riff(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), clean_index(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_free_stream(), ff_mov_read_stsd_entries(), flush_packet(), flv_write_header(), flv_write_packet(), flv_write_trailer(), get_subtitle_pkt(), get_system_header_size(), guess_ni_flag(), gxf_compare_field_nb(), gxf_find_lines_index(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_mpeg_auxiliary(), gxf_write_track_description_section(), gxf_write_umf_media_description(), gxf_write_umf_media_mpeg(), gxf_write_umf_track_description(), http_prepare_data(), interleave_new_audio_packet(), mov_build_index(), mov_find_next_sample(), mov_read_chapters(), mov_read_close(), mov_read_covr(), mov_read_ctts(), mov_read_custom_metadata(), mov_read_dref(), mov_read_elst(), mov_read_header(), mov_read_mdhd(), mov_read_packet(), mov_read_sbgp(), mov_read_seek(), mov_read_stco(), mov_read_stps(), mov_read_stsc(), mov_read_stss(), mov_read_stsz(), mov_read_stts(), mov_read_timecode_track(), mov_read_tkhd(), mov_read_tmcd(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), mpeg_mux_end(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegts_get_pcr(), mpegts_insert_pcr_only(), mpegts_set_stream_info(), mpegts_write_end(), mpegts_write_flush(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpegts_write_pmt(), mxf_compare_timestamps(), mxf_compute_sample_count(), mxf_free(), mxf_get_stream_index(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_parse_mpeg2_frame(), mxf_parse_structural_metadata(), mxf_read_close(), mxf_read_packet_old(), mxf_read_seek(), mxf_set_audio_pts(), mxf_write_cdci_common(), mxf_write_essence_container_refs(), mxf_write_footer(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_index_table_segment(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_packet(), mxf_write_system_item(), mxf_write_track(), new_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nsv_read_seek(), ogg_buffer_data(), ogg_compare_granule(), ogg_write_header(), ogg_write_packet(), ogg_write_page(), ogg_write_pages(), ogg_write_trailer(), output_packet(), parse_chunks(), put_system_header(), qt_rtp_parse_packet(), read_braindead_odml_indx(), read_gab2_sub(), remove_decoded_packets(), rm_read_close(), rm_read_header(), rm_read_header_old(), rm_read_packet(), rtp_new_av_stream(), sap_write_close(), sap_write_header(), sap_write_packet(), seek_subtitle(), and tmcd_is_referenced().

struct AVFrac AVStream::pts

encoding: pts generation when outputting stream

Examples:
doc/examples/muxing.c.

Definition at line 684 of file avformat.h.

Referenced by compute_pkt_fields2(), do_video_stats(), init_pts(), main(), and print_report().

AVRational AVStream::time_base

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

decoding: set by libavformat encoding: set by libavformat in avformat_write_header. The muxer may use the user-provided value of codec->time_base as a hint.

Examples:
doc/examples/filtering_audio.c, and doc/examples/muxing.c.

Definition at line 695 of file avformat.h.

Referenced by audio_decode_frame(), av_pkt_dump2(), av_pkt_dump_log2(), avformat_find_stream_info(), avformat_seek_file(), avi_read_packet(), avi_read_seek(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avpriv_set_pts_info(), choose_output(), compute_pkt_fields(), compute_pkt_fields2(), concat_read_header(), concat_read_packet(), configure_input_video_filter(), decode_audio(), decode_video(), do_audio_out(), do_streamcopy(), do_subtitle_out(), do_video_out(), dump_stream_format(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_compute_frame_duration(), ff_framehash_write_header(), ff_gen_syncpoint_search(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_mov_init_hinting(), ff_pcm_read_seek(), ff_read_packet(), ff_update_cur_dts(), ff_write_chained(), fill_all_stream_timings(), finalize_packet(), flac_read_header(), flush_encoders(), get_subtitle_pkt(), get_video_frame(), guess_ni_flag(), handle_file(), hls_read_header(), hls_read_packet(), hls_read_seek(), hls_write_packet(), http_prepare_data(), init_filters(), init_pts(), init_stream(), interleave_compare_dts(), interleave_new_audio_packet(), ism_write_header(), ism_write_packet(), ivf_write_header(), libquvi_read_header(), main(), mov_read_chapters(), mov_read_seek(), mov_write_single_packet(), movie_config_output_props(), mp3_parse_vbr_tags(), mxf_compute_sample_count(), mxf_parse_structural_metadata(), mxf_read_seek(), nut_read_header(), ogg_buffer_data(), ogg_compare_granule(), open_slave(), output_packet(), parse_packet(), print_report(), process_input(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), read_gab2_sub(), read_header(), read_seek(), read_thread(), real_seek(), report_new_stream(), rl2_read_seek(), rtp_parse_one_packet(), rtsp_read_play(), rtsp_read_seek(), sap_fetch_packet(), sap_read_header(), sbg_read_seek2(), search_hi_lo_keyframes(), seek_frame_internal(), seek_subtitle(), seg_write_packet(), show_frame(), show_packet(), show_stream(), sub2video_heartbeat(), sub2video_update(), subtitle_thread(), tee_write_packet(), transcode_init(), try_seek(), update_stream_timings(), update_wrap_reference(), vc1t_read_packet(), video_thread(), vqf_read_seek(), write_frame(), and write_packet().

int64_t AVStream::start_time

Decoding: pts of the first frame of the stream in presentation order, in stream time base.

Only set this if you are absolutely 100% sure that the value you set it to really is the pts of the first frame. This may be undefined (AV_NOPTS_VALUE).

Note
The ASF header does NOT contain a correct start_time the ASF demuxer must NOT set this.

Definition at line 705 of file avformat.h.

Referenced by adp_read_header(), aiff_read_header(), ape_read_header(), ast_read_header(), avformat_new_stream(), avi_read_header(), avisynth_create_stream_video(), avpriv_dv_init_demux(), cdxl_read_packet(), create_audio_stream(), do_video_out(), dv_extract_audio_info(), ea_read_header(), estimate_timings_from_pts(), ff_raw_audio_read_header(), ff_raw_data_read_header(), fill_all_stream_timings(), g723_1_init(), gxf_header(), gxf_seek(), hls_read_packet(), idcin_read_header(), ilbc_read_header(), img_read_header(), matroska_read_header(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpegts_read_header(), mxf_parse_structural_metadata(), nsv_parse_NSVs_header(), nut_read_header(), ogg_get_length(), ogg_read_header(), oma_read_header(), open_slave(), opus_packet(), process_input(), read_header(), read_thread(), rm_read_header(), sbg_read_header(), sbg_read_packet(), seq_read_header(), show_stream(), skeleton_header(), smush_read_header(), str_read_packet(), tak_read_header(), tedcaptions_read_header(), theora_packet(), tta_read_header(), update_initial_timestamps(), update_stream_timings(), vid_read_packet(), vivo_read_header(), vorbis_packet(), vqf_read_header(), wsvqa_read_header(), wv_read_header(), and xa_read_header().

int64_t AVStream::duration

Decoding: duration of the stream, in stream time base.

If a source file does not specify a duration, but does specify a bitrate, this value will be estimated from bitrate and file size.

Definition at line 712 of file avformat.h.

Referenced by adp_read_header(), afc_read_header(), aiff_read_header(), ape_read_header(), asf_read_stream_properties(), ast_read_header(), avformat_new_stream(), avi_read_header(), avisynth_create_stream_video(), bfi_read_header(), dfa_read_header(), ea_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), fill_all_stream_timings(), flac_read_header(), gxf_header(), has_duration(), img_read_header(), ivf_write_header(), lxf_read_header(), modplug_read_header(), mov_build_index(), mov_read_chapters(), mov_read_header(), mov_read_mdhd(), mov_read_packet(), mov_read_stts(), mov_read_trak(), mov_read_trun(), mp3_parse_vbr_tags(), mp3_seek(), mpc8_read_header(), mpc_read_header(), mxf_compute_index_tables(), mxf_parse_structural_metadata(), mxf_read_packet(), nist_read_header(), nsv_parse_NSVs_header(), nut_read_header(), ogg_get_length(), open_slave(), parse_video_var(), pmp_header(), r3d_read_rdvo(), read_header(), read_header_gme(), read_packet(), read_pakt_chunk(), read_seek(), redspark_read_header(), redspark_read_packet(), rm_read_header(), rsd_read_header(), rso_read_header(), sbg_read_header(), sbg_read_packet(), show_stream(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), smush_read_header(), tak_read_header(), tedcaptions_read_header(), theora_packet(), thp_read_header(), tta_read_header(), update_stream_timings(), vc1t_read_header(), vorbis_packet(), wsvqa_read_header(), wv_read_header(), xmv_read_header(), and xwma_read_header().

int64_t AVStream::nb_frames
int AVStream::disposition
enum AVDiscard AVStream::discard
AVRational AVStream::sample_aspect_ratio
AVDictionary* AVStream::metadata
AVRational AVStream::avg_frame_rate
AVPacket AVStream::attached_pic

For streams with AV_DISPOSITION_ATTACHED_PIC disposition, this packet will contain the attached picture.

decoding: set by libavformat, must not be modified by the caller. encoding: unused

Definition at line 741 of file avformat.h.

Referenced by ape_tag_read_field(), asf_read_picture(), avformat_queue_attached_pictures(), ff_flac_parse_picture(), ff_free_stream(), ff_id3v2_parse_apic(), get_attachment(), mov_read_covr(), and read_thread().

int64_t AVStream::last_dts

Definition at line 756 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int64_t AVStream::duration_gcd

Definition at line 757 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVStream::duration_count

Definition at line 758 of file avformat.h.

Referenced by avformat_find_stream_info().

double(* AVStream::duration_error)[2][MAX_STD_TIMEBASES]

Definition at line 759 of file avformat.h.

Referenced by avformat_find_stream_info(), avi_read_header(), and ff_free_stream().

int64_t AVStream::codec_info_duration

Definition at line 760 of file avformat.h.

Referenced by avformat_find_stream_info().

int64_t AVStream::codec_info_duration_fields

Definition at line 761 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVStream::found_decoder

Definition at line 762 of file avformat.h.

Referenced by avformat_find_stream_info(), has_codec_parameters(), and try_decode_frame().

int64_t AVStream::last_duration

Definition at line 764 of file avformat.h.

Referenced by estimate_timings_from_pts().

int64_t AVStream::fps_first_dts

Those are used for average framerate estimation.

Definition at line 769 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_first_dts_idx

Definition at line 770 of file avformat.h.

Referenced by avformat_find_stream_info().

int64_t AVStream::fps_last_dts

Definition at line 771 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_last_dts_idx

Definition at line 772 of file avformat.h.

Referenced by avformat_find_stream_info().

struct { ... } * AVStream::info
int AVStream::pts_wrap_bits

number of bits in pts (used for wrapping control)

Definition at line 776 of file avformat.h.

Referenced by av_read_frame(), avpriv_set_pts_info(), compute_pkt_fields(), hls_read_header(), libquvi_read_header(), process_input(), update_wrap_reference(), and wrap_timestamp().

int64_t AVStream::reference_dts

Timestamp corresponding to the last dts sync point.

Initialized when AVCodecParserContext.dts_sync_point >= 0 and a DTS is received from the underlying container. Otherwise set to AV_NOPTS_VALUE by default.

Definition at line 786 of file avformat.h.

Referenced by avformat_new_stream(), compute_pkt_fields(), estimate_timings_from_pts(), ff_read_frame_flush(), ff_restore_parser_state(), and ff_store_parser_state().

int64_t AVStream::first_dts
int64_t AVStream::cur_dts
int64_t AVStream::last_IP_pts
int AVStream::last_IP_duration

Definition at line 790 of file avformat.h.

Referenced by compute_pkt_fields().

int AVStream::probe_packets
int AVStream::codec_info_nb_frames

Number of frames that have been demuxed during av_find_stream_info()

Definition at line 801 of file avformat.h.

Referenced by av_find_best_stream(), avformat_find_stream_info(), dump_stream_format(), has_codec_parameters(), and try_decode_frame().

enum AVStreamParseType AVStream::need_parsing
struct AVCodecParserContext* AVStream::parser
struct AVPacketList* AVStream::last_in_packet_buffer

last packet in packet_buffer for this stream when muxing.

Definition at line 810 of file avformat.h.

Referenced by ff_interleave_add_packet(), ff_interleave_packet_per_dts(), and mxf_interleave_get_packet().

AVProbeData AVStream::probe_data

Definition at line 811 of file avformat.h.

Referenced by ff_free_stream(), and probe_codec().

int64_t AVStream::pts_buffer[MAX_REORDER_DELAY+1]
AVIndexEntry* AVStream::index_entries
int AVStream::nb_index_entries
unsigned int AVStream::index_entries_allocated_size

Definition at line 818 of file avformat.h.

Referenced by av_add_index_entry(), and mov_build_index().

AVRational AVStream::r_frame_rate

Real base framerate of the stream.

This is the lowest framerate with which all timestamps can be represented accurately (it is the least common multiple of all framerates in the stream). Note, this value is just a guess! For example, if the time base is 1/90000 and all frames have either approximately 3600 or 1800 timer ticks, then r_frame_rate will be 50/1.

Code outside avformat should access this field using: av_stream_get/set_r_frame_rate(stream)

Definition at line 831 of file avformat.h.

Referenced by av_guess_frame_rate(), avformat_find_stream_info(), avs_read_packet(), concat_read_header(), decode_info_header(), dump_stream_format(), ea_read_header(), ff_compute_frame_duration(), ff_rm_read_mdpr_codecdata(), matroska_read_header(), mov_read_trak(), movie_config_output_props(), nuv_header(), open_slave(), r3d_read_red1(), show_stream(), transcode_init(), and v4l2_set_parameters().

int AVStream::stream_identifier

Stream Identifier This is the MPEG-TS stream identifier +1 0 means unknown.

Definition at line 838 of file avformat.h.

Referenced by ff_parse_mpeg2_descriptor().

int64_t AVStream::interleaver_chunk_size

Definition at line 840 of file avformat.h.

Referenced by ff_interleave_add_packet().

int64_t AVStream::interleaver_chunk_duration

Definition at line 841 of file avformat.h.

Referenced by ff_interleave_add_packet().

int AVStream::request_probe

stream probing state -1 -> probing finished 0 -> no probing requested rest -> perform probing with request_probe being the minimum score to accept.

NOT PART OF PUBLIC API

Definition at line 850 of file avformat.h.

Referenced by asf_read_stream_properties(), avformat_find_stream_info(), avi_read_header(), ff_parse_mpeg2_descriptor(), ff_read_packet(), mpegps_read_packet(), mpegts_find_stream_type(), mpegts_push_data(), probe_codec(), and set_codec_from_probe_data().

int AVStream::skip_to_keyframe

Indicates that everything up to the next keyframe should be discarded.

Definition at line 855 of file avformat.h.

Referenced by matroska_parse_block(), matroska_read_seek(), and read_frame_internal().

int AVStream::skip_samples

Number of samples to skip at the start of the frame decoded from the next packet.

Definition at line 860 of file avformat.h.

Referenced by av_read_frame(), mov_read_header(), mov_read_seek(), mp3_parse_vbr_tags(), and mp3_seek().

int AVStream::nb_decoded_frames

Number of internally decoded frames, used internally in libavformat, do not access its lifetime differs from info which is why it is not in that structure.

Definition at line 866 of file avformat.h.

Referenced by has_codec_parameters(), has_decode_delay_been_guessed(), and try_decode_frame().

int64_t AVStream::mux_ts_offset

Timestamp offset added to timestamps before muxing NOT PART OF PUBLIC API.

Definition at line 872 of file avformat.h.

Referenced by write_packet().

int64_t AVStream::pts_wrap_reference

Internal data to check for wrapping of the time stamp.

Definition at line 877 of file avformat.h.

Referenced by avformat_new_stream(), update_wrap_reference(), and wrap_timestamp().

int AVStream::pts_wrap_behavior

Options for behavior, when a wrap is detected.

Defined by AV_PTS_WRAP_ values.

If correction is enabled, there are two possibilities: If the first time stamp is near the wrap point, the wrap offset will be subtracted, which will create negative time stamps. Otherwise the offset will be added.

Definition at line 889 of file avformat.h.

Referenced by avformat_new_stream(), update_initial_timestamps(), update_wrap_reference(), and wrap_timestamp().


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