FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
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
 
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.
 
AVPacketSideDataside_data
 An array of side data that applies to the whole stream (i.e.
 
int nb_side_data
 The number of elements in the AVStream.side_data array.
 
int event_flags
 Flags for the user to detect events happening on the stream.
 
struct {
   int64_t   last_dts
 
   int64_t   duration_gcd
 
   int   duration_count
 
   int64_t   rfps_duration_sum
 
   double(*   duration_error )[2][MAX_STD_TIMEBASES]
 
   int64_t   codec_info_duration
 
   int64_t   codec_info_duration_fields
 
   int   found_decoder
 0 -> decoder has not been searched for yet.
 
   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 first_dts
 Timestamp corresponding to the last dts sync point.
 
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.
 
int64_t first_discard_sample
 If not 0, the first audio sample that should be discarded from the stream.
 
int64_t last_discard_sample
 The sample after last sample that is intended to be discarded after first_discard_sample.
 
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.
 
int update_initial_durations_done
 Internal data to prevent doing update_initial_durations() twice.
 
int64_t pts_reorder_error [MAX_REORDER_DELAY+1]
 Internal data to generate dts from pts.
 
uint8_t pts_reorder_error_count [MAX_REORDER_DELAY+1]
 
int64_t last_dts_for_order_check
 Internal data to analyze DTS and detect faulty mpeg streams.
 
uint8_t dts_ordered
 
uint8_t dts_misordered
 
int inject_global_side_data
 Internal data to inject global side data.
 

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:
demuxing_decoding.c, muxing.c, remuxing.c, transcode_aac.c, and transcoding.c.

Definition at line 782 of file avformat.h.

Field Documentation

int AVStream::index

stream index in AVFormatContext

Examples:
muxing.c.

Definition at line 783 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_filter(), configure_input_video_filter(), dc1394_read_common(), decode_audio(), decode_video(), do_video_out(), dshow_add_device(), dump_attachment(), dv_extract_audio_info(), ea_read_header(), ff_flac_parse_picture(), ff_h261_handle_packet(), 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_audio_config(), get_format(), get_ost_filters(), get_subtitle_pkt(), get_video_config(), guess_input_channel_layout(), gxf_write_header(), gxf_write_media_preamble(), h263_handle_packet(), h264_handle_packet(), hevc_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(), matroska_parse_webvtt(), mov_build_index(), mov_read_covr(), mov_read_trak(), mov_read_trun(), mov_seek_stream(), mov_write_tkhd_tag(), movie_common_init(), movie_push_frame(), mpeg_parse_packet(), mpegps_read_packet(), mpegts_push_data(), 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(), vdpau_alloc(), vid_read_packet(), decklink_input_callback::VideoInputFrameArrived(), vmd_read_header(), vp8_handle_packet(), wc3_read_header(), 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:
demuxing_decoding.c, filtering_audio.c, filtering_video.c, muxing.c, remuxing.c, transcode_aac.c, and transcoding.c.

Definition at line 801 of file avformat.h.

Referenced by a64_write_header(), add_av_stream(), add_av_stream1(), add_codec(), add_dstream(), add_input_streams(), add_metadata_from_renditions(), 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_read_header(), audio_write_frame(), audio_write_header(), av_find_best_stream(), av_find_default_stream_index(), av_guess_frame_rate(), av_guess_sample_aspect_ratio(), avformat_find_stream_info(), avformat_match_stream_specifier(), avformat_new_stream(), avi_extract_stream_metadata(), 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(), bitstream_switching(), bmv_read_header(), build_feed_streams(), build_file_streams(), build_frame_code(), caca_write_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), calculate_bitrate(), cdata_read_header(), cdxl_read_packet(), celt_header(), check_keyboard_interaction(), check_matching_height(), check_matching_sample_rate(), check_matching_width(), check_packet(), check_stream_max_drift(), choose_decoder(), choose_encoder(), choose_sample_fmt(), cin_read_header(), cine_read_header(), close_connection(), close_input_file(), close_stream(), compute_bandwidth(), compute_display_area(), compute_overlay_rect(), compute_pkt_fields(), compute_pkt_fields2(), compute_status(), configure_output_audio_filter(), copy_stream_props(), create_audio_stream(), create_new_audio_stream(), create_stream(), daud_header(), daud_write_header(), dc1394_read_common(), decklink_setup_audio(), decklink_setup_video(), decode_stream_header(), decode_video(), detect_stream_specific(), dfa_read_header(), dirac_header(), do_streamcopy(), do_video_out(), dsf_read_header(), dsf_read_packet(), 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(), dv_inject_audio(), dv_write_pack(), dxa_read_header(), ea_read_header(), enable_tracks(), encode_write_frame(), epaf_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), event_thread(), export_orphan_timecode(), extract_mpeg4_header(), fbdev_read_header(), fbdev_write_header(), fbdev_write_packet(), ff_alsa_open(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_compute_frame_duration(), ff_decklink_write_header(), ff_decklink_write_packet(), ff_dv_offset_reset(), ff_flac_parse_picture(), ff_free_stream(), ff_generate_avci_extradata(), ff_get_bmp_header(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_img_read_header(), ff_img_read_packet(), 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_parse_specific_params(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_raw_video_read_header(), ff_rfps_calculate(), 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(), filter_packet(), find_decoder(), find_fps(), find_stream(), find_stream_in_feed(), flac_header(), flac_read_header(), flac_read_timestamp(), flac_write_header(), flac_write_trailer(), flush_encoder(), 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(), framecrc_write_header(), frm_read_header(), frm_read_packet(), g722_read_header(), g723_1_init(), g729_read_header(), g729_read_packet(), gdigrab_read_header(), get_aiff_header(), get_attachment(), get_audio_config(), get_audio_frame(), get_codec_data(), get_ost_filters(), get_packet_header(), get_private_data(), get_sindex(), get_video_config(), get_video_frame(), gif_image_write_header(), gif_read_header(), gif_write_header(), grab_read_header(), gsm_read_header(), guess_channel_layout(), gxf_compare_field_nb(), gxf_find_lines_index(), gxf_interleave_packet(), gxf_packet(), gxf_write_dv_auxiliary(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_mpeg_auxiliary(), gxf_write_packet(), gxf_write_umf_media_description(), gxf_write_umf_media_dv(), gxf_write_umf_media_mpeg(), handle_file(), has_codec_parameters(), has_decode_delay_been_guessed(), hds_write_header(), hds_write_packet(), hevc_parse_sdp_line(), hls_mux_init(), hls_read_header(), hls_write_header(), hls_write_packet(), hnm_read_header(), 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(), init_filters(), init_input_filter(), init_muxer(), init_pts(), init_stream(), 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(), log_slave(), lrc_read_header(), lrc_write_header(), lvf_read_header(), lxf_read_header(), m4sl_cb(), main(), matroska_parse_block(), matroska_parse_flac(), matroska_parse_frame(), matroska_parse_rm_audio(), matroska_parse_tracks(), matroska_parse_wavpack(), matroska_read_header(), microdvd_read_header(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_cues(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_track(), mmf_read_header(), modify_current_stream(), modplug_read_header(), mov_build_index(), mov_codec_id(), mov_create_dvd_sub_decoder_specific_info(), mov_finalize_stsd_codec(), mov_parse_stsd_audio(), mov_parse_stsd_data(), mov_parse_stsd_subtitle(), mov_parse_stsd_video(), mov_read_ares(), mov_read_colr(), 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_stss(), mov_read_targa_y216(), mov_read_trak(), mov_read_trun(), mov_read_wave(), mov_read_wfex(), mov_rewrite_dvd_sub_extradata(), mov_write_ftyp_tag(), mov_write_header(), mov_write_tkhd_tag(), mov_write_uuidprof_tag(), movie_common_init(), movie_config_output_props(), movie_push_frame(), movie_query_formats(), movie_uninit(), 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_generic_sound_common(), mxf_write_header(), mxf_write_mpegvideo_desc(), mxf_write_packet(), mxf_write_wav_common(), mxg_read_header(), nc_read_header(), new_output_stream(), new_stream(), nist_read_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nut_read_header(), nut_write_header(), nuv_header(), ogg_buffer_data(), ogg_read_seek(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet_internal(), 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(), opengl_compute_display_area(), opengl_draw(), opengl_write_header(), opt_map_channel(), opt_target(), opus_header(), output_packet(), parse_audio_var(), parse_dsd_prop(), 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_videoinfoheader2(), parse_vtrk(), pcm_read_header(), pjs_read_header(), pmp_header(), pmt_cb(), prepare_sdp_description(), probe_codec(), process_frame(), pulse_read_header(), pulse_write_frame(), pulse_write_header(), pulse_write_packet(), put_frame(), put_videoinfoheader2(), pva_read_header(), pvf_read_header(), qcp_read_header(), qdm2_parse_config(), qdm2_parse_packet(), qt_rtp_parse_packet(), qtkit_read_header(), 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(), read_thread(), real_parse_asm_rule(), realtext_read_header(), 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(), roq_write_header(), 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(), scan_file(), sdl_write_header(), sdl_write_packet(), sdp_parse_fmtp_config_h264(), sdr2_read_header(), seek_frame_generic(), seg_write_header(), segment_mux_init(), select_from_pts_buffer(), 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(), stl_read_header(), str_read_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), subviewer1_read_header(), subviewer_read_header(), sup_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_init(), try_decode_frame(), ts_to_samples(), 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(), decklink_input_callback::VideoInputFrameArrived(), vivo_read_header(), vmd_read_header(), voc_read_header(), voc_write_header(), voc_write_packet(), vorbis_header(), vp8_header(), vplayer_read_header(), vqf_read_header(), vqf_read_seek(), wc3_read_header(), webvtt_read_header(), write_adaptation_set(), write_audio_frame(), write_frame(), write_header(), write_manifest(), write_packet(), write_representation(), 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_generate_header(), yuv4_read_header(), yuv4_read_packet(), yuv4_write_header(), and yuv4_write_packet().

void* AVStream::priv_data

Definition at line 802 of file avformat.h.

Referenced by add_av_stream1(), 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(), check_stream_max_drift(), 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(), 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_parse_stsd_data(), mov_read_chapters(), mov_read_close(), mov_read_covr(), mov_read_ctts(), mov_read_custom_2plus(), 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_tfdt(), 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_d10_video_packet(), mxf_write_essence_container_refs(), mxf_write_footer(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_index_table_segment(), mxf_write_mpegvideo_desc(), 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_seek(), ogg_buffer_data(), ogg_compare_granule(), ogg_write_header(), ogg_write_packet(), ogg_write_packet_internal(), 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().

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: May be set by the caller before avformat_write_header() to provide a hint to the muxer about the desired timebase. In avformat_write_header(), the muxer will overwrite this field with the timebase that will actually be used for the timestamps written into the file (which may or may not be related to the user-provided one, depending on the format).

Examples:
filtering_audio.c, muxing.c, remuxing.c, and transcoding.c.

Definition at line 824 of file avformat.h.

Referenced by add_stream(), av_pkt_dump2(), av_pkt_dump_log2(), avformat_find_stream_info(), avformat_seek_file(), avi_read_header(), avi_read_packet(), avi_read_seek(), avi_write_header(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avpriv_set_pts_info(), calculate_bitrate(), check_stream_max_drift(), choose_output(), compute_pkt_fields(), compute_pkt_fields2(), concat_read_packet(), configure_input_video_filter(), copy_stream_props(), decode_audio(), decode_video(), do_audio_out(), do_streamcopy(), do_subtitle_out(), do_video_out(), do_video_stats(), dump_stream_format(), dv_extract_video_info(), encode_write_frame(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_choose_timebase(), ff_framehash_write_header(), ff_gen_syncpoint_search(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_mov_init_hinting(), ff_parse_specific_params(), ff_pcm_read_seek(), ff_read_packet(), ff_rfps_add_frame(), ff_rfps_calculate(), ff_rtp_chain_mux_open(), ff_rtsp_open_transport_ctx(), ff_update_cur_dts(), ff_write_chained(), fill_all_stream_timings(), fill_timing_for_id3_timestamped_stream(), finalize_packet(), flac_read_header(), flush_encoders(), get_subtitle_pkt(), get_timebase(), get_video_frame(), handle_file(), hds_write_header(), hds_write_packet(), hls_mux_init(), hls_read_header(), hls_read_packet(), hls_read_seek(), hls_write_header(), hls_write_packet(), http_prepare_data(), init_filters(), init_muxer(), init_pts(), init_stream(), interleave_compare_dts(), interleave_new_audio_packet(), ism_write_header(), ism_write_packet(), ivf_write_header(), libquvi_read_header(), log_packet(), main(), matroska_parse_tracks(), mov_get_dv_codec_tag(), mov_read_chapters(), mov_read_seek(), mov_write_header(), mov_write_single_packet(), mov_write_uuidprof_tag(), movie_config_output_props(), mpegts_write_header(), mpegts_write_packet_internal(), mxf_compute_sample_count(), mxf_parse_structural_metadata(), mxf_read_seek(), mxf_write_header(), nut_read_header(), ogg_buffer_data(), ogg_compare_granule(), open_slave(), parse_packet(), print_report(), process_input(), process_input_packet(), pulse_write_packet(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), read_gab2_sub(), read_header(), read_interval_packets(), read_seek(), read_thread(), real_seek(), report_new_stream(), rl2_read_seek(), rm_write_header(), rtp_parse_one_packet(), rtsp_read_play(), rtsp_read_seek(), sap_fetch_packet(), sap_read_header(), sap_write_header(), sbg_read_seek2(), search_hi_lo_keyframes(), seek_frame_internal(), seek_subtitle(), seg_write_packet(), segment_mux_init(), show_frame(), show_packet(), show_stream(), smush_read_header(), stream_component_open(), sub2video_heartbeat(), sub2video_update(), swf_write_header(), tee_write_packet(), transcode_init(), try_seek(), ts_to_samples(), txd_read_header(), update_stream_timings(), update_wrap_reference(), vc1t_read_packet(), video_thread(), decklink_input_callback::VideoInputFrameArrived(), vqf_read_seek(), write_frame(), write_manifest(), write_packet(), write_trailer(), write_video_frame(), yuv4_generate_header(), and yuv4_read_header().

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 834 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_img_read_header(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_read_packet(), fill_all_stream_timings(), g723_1_init(), gxf_header(), gxf_seek(), hnm_read_header(), idcin_read_header(), ilbc_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(), stream_component_open(), 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(), vp8_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 841 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_audio(), avisynth_create_stream_video(), bfi_read_header(), cine_read_header(), cine_read_packet(), dfa_read_header(), ea_read_header(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_img_read_header(), fill_all_stream_timings(), flac_read_header(), gxf_header(), handle_file(), has_duration(), 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_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(), vp8_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

Definition at line 856 of file avformat.h.

Referenced by add_metadata_from_renditions(), ape_tag_read_field(), asf_read_header(), asf_read_picture(), avformat_match_stream_specifier(), avi_extract_stream_metadata(), avi_read_tag(), avi_write_header(), bitstream_switching(), cine_read_header(), copy_metadata(), decode_info_header(), dump_attachment(), dump_stream_format(), dv_write_header(), export_orphan_timecode(), ff_flac_parse_picture(), ff_free_stream(), ff_id3v2_parse_apic(), ff_id3v2_write_apic(), ff_metadata_conv_ctx(), ff_parse_mpeg2_descriptor(), ff_vorbis_stream_comment(), find_compressor(), get_attachment(), get_duration(), gxf_write_header(), hls_read_header(), iff_read_header(), matroska_parse_tracks(), matroska_read_header(), mkv_write_attachments(), mkv_write_header(), mkv_write_stereo_mode(), mkv_write_tags(), mkv_write_track(), mov_parse_stsd_data(), mov_parse_stsd_video(), mov_read_hdlr(), mov_read_header(), mov_read_mdhd(), mov_read_tkhd(), mov_write_hdlr_tag(), mov_write_header(), mov_write_tkhd_tag(), mov_write_tmcd_tag(), mov_write_track_metadata(), mp3_write_xing(), mpegts_write_pmt(), mxf_parse_physical_source_package(), mxf_parse_structural_metadata(), mxf_write_header(), ogg_write_header(), open_output_file(), open_slave(), parse_chunks(), parse_dsd_prop(), parse_timecode_in_framenum_format(), r3d_read_red1(), read_gab2_sub(), read_header(), segment_mux_init(), set_encoder_id(), show_stream(), subsegment_alignment(), vorbis_header(), vorbis_update_metadata(), webm_dash_manifest_cues(), webm_dash_manifest_read_header(), write_adaptation_set(), write_representation(), write_streaminfo(), write_table_entries_attrib(), write_table_redirector_legacy_attrib(), and write_trailer().

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 874 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(), id3_has_changed_values(), mov_read_covr(), and read_thread().

AVPacketSideData* AVStream::side_data

An array of side data that applies to the whole stream (i.e.

the container does not allow it to change between packets).

There may be no overlap between the side data in this array and side data in the packets. I.e. a given side data is either exported by the muxer (demuxing) / set by the caller (muxing) in this array, then it never appears in the packets, or the side data is exported / sent through the packets (always in the first packet where the value becomes known or changes), then it does not appear in this array.

  • demuxing: Set by libavformat when the stream is created.
  • muxing: May be set by the caller before avformat_write_header().

Freed by libavformat in avformat_free_context().

See Also
av_format_inject_global_side_data()

Definition at line 894 of file avformat.h.

Referenced by av_stream_get_side_data(), dump_sidedata(), ff_free_stream(), ff_mkv_stereo3d_conv(), ff_replaygain_export_raw(), mkv_write_stereo_mode(), mov_read_header(), process_input(), read_frame_internal(), and transcode_init().

int AVStream::nb_side_data
int AVStream::event_flags

Flags for the user to detect events happening on the stream.

Flags must be cleared by the user once the event has been handled. A combination of AVSTREAM_EVENT_FLAG_*.

Definition at line 905 of file avformat.h.

Referenced by decode_info_header(), and ff_vorbis_stream_comment().

int64_t AVStream::last_dts
int64_t AVStream::duration_gcd

Definition at line 922 of file avformat.h.

Referenced by ff_rfps_add_frame(), and ff_rfps_calculate().

int AVStream::duration_count

Definition at line 923 of file avformat.h.

Referenced by avformat_find_stream_info(), ff_rfps_add_frame(), and ff_rfps_calculate().

int64_t AVStream::rfps_duration_sum

Definition at line 924 of file avformat.h.

Referenced by ff_rfps_add_frame(), and ff_rfps_calculate().

double(* AVStream::duration_error)[2][MAX_STD_TIMEBASES]
int64_t AVStream::codec_info_duration

Definition at line 926 of file avformat.h.

Referenced by avformat_find_stream_info(), and ff_rfps_calculate().

int64_t AVStream::codec_info_duration_fields

Definition at line 927 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVStream::found_decoder

0 -> decoder has not been searched for yet.

>0 -> decoder found <0 -> decoder with codec_id == -found_decoder has not been found

Definition at line 934 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 936 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 941 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_first_dts_idx

Definition at line 942 of file avformat.h.

Referenced by avformat_find_stream_info().

int64_t AVStream::fps_last_dts

Definition at line 943 of file avformat.h.

Referenced by avformat_find_stream_info(), and avformat_new_stream().

int AVStream::fps_last_dts_idx

Definition at line 944 of file avformat.h.

Referenced by avformat_find_stream_info().

struct { ... } * AVStream::info
int AVStream::pts_wrap_bits
int64_t AVStream::first_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 958 of file avformat.h.

Referenced by add_dstream(), avformat_find_stream_info(), avformat_new_stream(), do_video_out(), estimate_timings_from_pts(), ff_read_frame_flush(), ff_read_packet(), hds_write_packet(), ism_write_packet(), rdt_parse_sdp_line(), update_initial_durations(), and update_initial_timestamps().

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

Definition at line 961 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 972 of file avformat.h.

Referenced by av_find_best_stream(), av_find_default_stream_index(), 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 981 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 982 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 989 of file avformat.h.

Referenced by av_add_index_entry(), mov_build_index(), and scan_file().

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 1002 of file avformat.h.

Referenced by av_guess_frame_rate(), avformat_find_stream_info(), avs_read_packet(), copy_stream_props(), decode_info_header(), dump_stream_format(), ea_read_header(), ff_rfps_calculate(), ff_rm_read_mdpr_codecdata(), matroska_parse_tracks(), 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 1009 of file avformat.h.

Referenced by ff_parse_mpeg2_descriptor().

int64_t AVStream::interleaver_chunk_size

Definition at line 1011 of file avformat.h.

Referenced by ff_interleave_add_packet().

int64_t AVStream::interleaver_chunk_duration

Definition at line 1012 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 1021 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 1026 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 1031 of file avformat.h.

Referenced by mov_read_header(), mov_read_seek(), mp3_seek(), and read_frame_internal().

int64_t AVStream::first_discard_sample

If not 0, the first audio sample that should be discarded from the stream.

This is broken by design (needs global sample count), but can't be avoided for broken by design formats such as mp3 with ad-hoc gapless audio support.

Definition at line 1039 of file avformat.h.

Referenced by read_frame_internal().

int64_t AVStream::last_discard_sample

The sample after last sample that is intended to be discarded after first_discard_sample.

Works on frame boundaries only. Used to prevent early EOF if the gapless info is broken (considered concatenated mp3s).

Definition at line 1046 of file avformat.h.

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 1052 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 1058 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 1063 of file avformat.h.

Referenced by avformat_new_stream(), mpegts_push_data(), 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 1075 of file avformat.h.

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

int AVStream::update_initial_durations_done

Internal data to prevent doing update_initial_durations() twice.

Definition at line 1080 of file avformat.h.

Referenced by update_initial_durations().

int64_t AVStream::pts_reorder_error[MAX_REORDER_DELAY+1]

Internal data to generate dts from pts.

Definition at line 1085 of file avformat.h.

Referenced by select_from_pts_buffer().

uint8_t AVStream::pts_reorder_error_count[MAX_REORDER_DELAY+1]

Definition at line 1086 of file avformat.h.

Referenced by select_from_pts_buffer().

int64_t AVStream::last_dts_for_order_check

Internal data to analyze DTS and detect faulty mpeg streams.

Definition at line 1091 of file avformat.h.

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

uint8_t AVStream::dts_ordered

Definition at line 1092 of file avformat.h.

Referenced by compute_pkt_fields().

uint8_t AVStream::dts_misordered

Definition at line 1093 of file avformat.h.

Referenced by compute_pkt_fields().

int AVStream::inject_global_side_data

Internal data to inject global side data.

Definition at line 1098 of file avformat.h.

Referenced by av_format_inject_global_side_data(), avformat_new_stream(), ff_read_frame_flush(), and read_frame_internal().


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