Format I/O context. More...
#include <avformat.h>
Format I/O context.
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(AVFormatContext) must not be used outside libav*, use avformat_alloc_context() to create an AVFormatContext.
Fields can be accessed through AVOptions (av_opt*), the name string used matches the associated command line parameter name and can be found in libavformat/options_table.h. The AVOption/command line parameter names differ in some cases from the C structure field names for historic reasons or brevity.
Definition at line 1333 of file avformat.h.
A class for logging and AVOptions.
Set by avformat_alloc_context(). Exports (de)muxer private options if they exist.
Definition at line 1338 of file avformat.h.
The input container format.
Demuxing only, set by avformat_open_input().
Definition at line 1345 of file avformat.h.
Referenced by assert_file_overwrite(), av_dump_format(), avformat_find_stream_info(), dump_stream_format(), dump_stream_group(), estimate_timings(), ff_img_read_header(), hls_read_packet(), ifile_open(), ist_use(), parse_playlist(), read_thread(), and ts_discontinuity_detect().
The output container format.
Muxing only, must be set by the caller before avformat_write_header().
Definition at line 1352 of file avformat.h.
Referenced by add_stream(), av_dump_format(), create_rtp_muxer(), create_streams(), dash_check_bitstream(), dump_stream_format(), dump_stream_group(), ff_rtp_chain_mux_open(), ff_rtp_get_payload_type(), hls_mux_init(), hls_start(), hls_write_packet(), log_slave(), main(), map_auto_audio(), map_auto_data(), map_auto_subtitle(), map_auto_video(), mpegts_init(), mux_fixup_ts(), new_stream_video(), of_open(), ost_add(), print_sdp(), print_streams(), rtp_mpegts_write_header(), seg_check_bitstream(), seg_write_packet(), segment_mux_init(), segment_start(), streamcopy_init(), and thread_set_name().
Format private data.
This is an AVOptions-enabled struct if and only if iformat/oformat.priv_class is not NULL.
Definition at line 1361 of file avformat.h.
Referenced by add_display_matrix(), add_file(), add_video_stream(), android_camera_read_close(), android_camera_read_header(), android_camera_read_packet(), apng_write_header(), apng_write_packet(), apng_write_trailer(), at_write_header(), at_write_packet(), at_write_trailer(), audio_get_output_timestamp(), audio_read_close(), audio_read_close(), audio_read_close(), audio_read_header(), audio_read_header(), audio_read_header(), audio_read_header(), audio_read_packet(), audio_read_packet(), audio_read_packet(), audio_read_packet(), audio_write_frame(), audio_write_header(), audio_write_header(), audio_write_header(), audio_write_packet(), audio_write_packet(), audio_write_packet(), audio_write_trailer(), audio_write_trailer(), camera_dev_disconnected(), camera_dev_error(), cine_read_packet(), cine_read_seek(), close_slaves(), concat_parse_script(), concat_read_close(), concat_read_header(), concat_read_packet(), concat_seek(), create_capture_session(), create_image_reader(), create_subcc_packet(), create_subcc_streams(), dc1394_close(), decklink_select_input(), decklink_setup_audio(), decklink_setup_video(), decklink_write_audio_packet(), decklink_write_data_packet(), decklink_write_subtitle_packet(), decklink_write_video_packet(), detect_stream_specific(), dshow_add_device(), dshow_cycle_devices(), dshow_cycle_formats(), dshow_cycle_pins(), dshow_list_device_options(), dshow_open_device(), dshow_read_header(), dshow_set_audio_buffer_size(), dshow_should_set_format(), efi_read(), failing_deinit(), fbdev_read_close(), fbdev_read_header(), fbdev_read_packet(), ff_alsa_close(), ff_alsa_xrun_recover(), ff_decklink_cleanup(), ff_decklink_init_device(), ff_decklink_list_formats(), ff_decklink_read_close(), ff_decklink_read_header(), ff_decklink_read_packet(), ff_decklink_set_configs(), ff_decklink_set_format(), ff_decklink_write_header(), ff_decklink_write_trailer(), ff_dshow_try_setup_crossbar_options(), ff_img_read_header(), ff_img_read_packet(), ff_oss_audio_open(), ff_rtp_get_payload_type(), ff_rtp_send_aac(), ff_rtp_send_amr(), ff_rtp_send_data(), ff_rtp_send_h263(), ff_rtp_send_h263_rfc2190(), ff_rtp_send_h264_hevc(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_rtp_send_mpegvideo(), ff_rtp_send_raw_rfc4175(), ff_rtp_send_vp8(), ff_rtp_send_xiph(), ff_sndio_open(), fifo_consumer_thread(), fifo_deinit(), fifo_init(), fifo_mux_init(), fifo_test_header(), fifo_test_packet(), fifo_test_trailer(), fifo_thread_attempt_recovery(), fifo_thread_flush_output(), fifo_thread_process_recovery_failure(), fifo_thread_recover(), fifo_thread_write_header(), fifo_thread_write_packet(), fifo_thread_write_trailer(), fifo_write_header(), fifo_write_packet(), fifo_write_trailer(), film_deinit(), film_init(), film_write_header(), film_write_packet(), flush_buffered(), flush_packet(), frm_read_packet(), gdigrab_read_close(), gdigrab_read_header(), gdigrab_read_packet(), get_current_fragment(), get_image_format(), get_metadata(), get_packet_lj92(), get_sensor_orientation(), hls_start(), hls_write_packet(), iec61883_close(), iec61883_read_header(), iec61883_read_packet(), image_available(), img_read_close(), init_subtitle_context(), kmsgrab_get_fb(), kmsgrab_read_close(), kmsgrab_read_header(), kmsgrab_read_packet(), lavfi_read_close(), lavfi_read_header(), lavfi_read_packet(), match_framerate(), match_streams(), match_streams_exact_id(), match_streams_one_to_one(), match_video_size(), mcc_init(), mcc_write_header(), mcc_write_packet(), mv_read_header(), mv_read_packet(), mv_read_seek(), nal_send(), open_camera(), open_file(), open_next_file(), opus_header(), opus_packet(), parse_audio_var(), parse_device_name(), parse_global_var(), rcwt_flush_cluster(), rcwt_read_header(), rcwt_write_header(), rcwt_write_packet(), read_data(), read_data_continuous(), read_data_subtitle_segment(), read_header(), read_header(), read_packet(), read_packet(), read_seek(), read_subtitle_packet(), real_seek(), rtcp_send_sr(), rtp_deinit(), rtp_send_ilbc(), rtp_send_mpegaudio(), rtp_send_mpegts_raw(), rtp_send_raw(), rtp_send_samples(), rtp_write_header(), rtp_write_packet(), rtp_write_trailer(), sbg_read_header(), scan_file(), scc_write_header(), scc_write_packet(), segment_start(), send_mode_a(), send_mode_b(), setup_crossbar_options(), srt_write_header(), srt_write_packet(), start_jack(), tedcaptions_read_close(), tedcaptions_read_header(), tedcaptions_read_packet(), tedcaptions_read_seek(), tee_process_slave_failure(), tee_write_header(), tee_write_packet(), tee_write_trailer(), try_seek(), update_init_section(), update_init_section(), wait_for_image_format(), write_header(), write_headers(), write_packet(), write_streamheader(), and write_trailer().
I/O context.
Do NOT set this field if AVFMT_NOFILE flag is set in iformat/oformat.flags. In such a case, the (de)muxer will handle I/O in some other way and this field will be NULL.
Definition at line 1375 of file avformat.h.
Referenced by apng_write_header(), apng_write_trailer(), asfrtp_parse_packet(), avformat_find_stream_info(), avi_read_close(), chunk_end(), chunk_start(), cine_read_header(), cine_read_packet(), cine_read_seek(), close_demux_for_component(), close_slave(), concat_parse_script(), create_rtp_muxer(), dash_flush(), dash_free(), dash_write_packet(), efi_read(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), event_loop(), ff_img_read_header(), ff_img_read_packet(), ff_mov_add_hinted_packet(), ff_mov_close_hinting(), ff_mov_generate_squashed_ttml_packet(), ff_rtp_chain_mux_open(), ff_rtp_send_data(), ff_rtsp_tcp_write_packet(), ff_rtsp_undo_setup(), ff_sauce_read(), ff_wms_parse_sdp_a_line(), fifo_thread_write_trailer(), film_write_packet(), flush_dynbuf(), flush_packet(), free_playlist_list(), free_representation(), frm_read_header(), frm_read_packet(), hds_flush(), hds_free(), hds_write_header(), hls_mux_init(), hls_read_header(), hls_start(), hls_write_packet(), hls_write_trailer(), init_subtitle_context(), ism_flush(), ism_free(), LLVMFuzzerTestOneInput(), main(), mcc_write_header(), mcc_write_packet(), microdvd_write_packet(), mpegts_write_packet_internal(), mv_read_header(), mv_read_packet(), mv_read_seek(), mxf_parse_handle_essence(), mxf_read_local_tags(), mxf_seek_to_previous_partition(), of_open(), parse_audio_var(), parse_global_var(), parse_playlist(), parse_video_var(), rcwt_flush_cluster(), rcwt_read_header(), rcwt_write_header(), rdt_parse_packet(), read_gab2_sub(), read_header(), read_header(), read_packet(), read_seek(), read_table(), read_thread(), reopen_demux_for_component(), rtcp_send_sr(), rtp_mpegts_write_close(), rtp_mpegts_write_header(), rtp_mpegts_write_packet(), rtp_write_header(), rtp_write_trailer(), sap_read_header(), sap_write_close(), sbg_read_header(), scc_write_header(), scc_write_packet(), seg_free(), seg_init(), seg_write_header(), seg_write_packet(), seg_write_trailer(), segment_end(), segment_start(), srt_write_packet(), tedcaptions_read_header(), update_stream_timings(), var_read_metadata(), webm_chunk_deinit(), webm_chunk_init(), webm_chunk_write_header(), webm_chunk_write_packet(), webm_chunk_write_trailer(), whip_deinit(), write_header(), and write_muxed_file().
Flags signalling stream properties.
A combination of AVFMTCTX_*. Set by libavformat.
Definition at line 1382 of file avformat.h.
Referenced by avformat_find_stream_info(), ff_img_read_header(), handle_packet(), hls_read_header(), hls_read_packet(), sap_read_header(), and tb_unreliable().
Number of elements in AVFormatContext.streams.
Set by avformat_new_stream(), must not be modified by any other code.
Definition at line 1389 of file avformat.h.
Referenced by add_stream(), asfrtp_parse_sdp_line(), at_write_header(), audio_write_header(), av_dump_format(), av_find_best_stream(), av_program_add_stream_index2(), avformat_find_stream_info(), close_slave(), concat_parse_script(), concat_read_header(), copy_meta(), copy_metadata(), create_stream_groups(), create_streams(), create_subcc_streams(), dash_read_header(), detect_bdmv_dovi_group(), ds_open(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_decklink_write_header(), ff_nut_reset_ts(), ff_rdt_parse_open(), ff_rfps_calculate(), fifo_consumer_thread(), fifo_mux_init(), fifo_thread_write_header(), fill_all_stream_timings(), film_init(), find_stream(), handle_id3(), has_duration(), hds_write_header(), hls_read_header(), hls_read_packet(), hls_read_seek(), id3_has_changed_values(), ifile_open(), log_slave(), main(), match_streams(), match_streams_exact_id(), match_streams_one_to_one(), mcc_init(), movie_common_init(), mv_read_packet(), mv_read_seek(), mxf_compute_index_tables(), mxf_parse_structural_metadata(), of_add_metadata(), of_parse_group_token(), open_demux_for_component(), open_slave(), open_track_resource_context(), probe_file(), read_gab2_sub(), read_packet(), read_thread(), real_seek(), reopen_demux_for_component(), rtp_write_header(), sap_fetch_packet(), sap_read_header(), seg_init(), set_disposition_bits(), setup_sync_queues(), stream_component_close(), stream_component_open(), tee_write_header(), update_stream_timings(), update_streams_from_subdemuxer(), write_header(), write_headers(), write_index(), and write_mainheader().
A list of all streams in the file.
New streams are created with avformat_new_stream().
Freed by libavformat in avformat_free_context().
Definition at line 1401 of file avformat.h.
Referenced by apng_write_header(), asfrtp_parse_packet(), asfrtp_parse_sdp_line(), at_write_header(), audio_write_frame(), audio_write_header(), audio_write_header(), audio_write_header(), av_find_best_stream(), avformat_find_stream_info(), cine_read_packet(), copy_meta(), copy_metadata(), create_rtp_muxer(), create_stream_groups(), create_subcc_streams(), dash_check_bitstream(), dash_read_packet(), decklink_write_audio_packet(), decklink_write_video_packet(), detect_bdmv_dovi_group(), ds_open(), dump_stream_format(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), ff_decklink_write_header(), ff_decklink_write_packet(), ff_img_read_packet(), ff_load_image(), ff_mov_init_hinting(), ff_rdt_parse_open(), ff_rfps_calculate(), ff_rtp_chain_mux_open(), ff_rtp_send_aac(), ff_rtp_send_amr(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_rtp_send_raw_rfc4175(), ff_rtp_send_xiph(), ff_sauce_read(), fifo_consumer_thread(), fifo_mux_init(), fifo_thread_attempt_recovery(), fifo_thread_write_header(), fifo_thread_write_packet(), fill_all_stream_timings(), fill_timing_for_id3_timestamped_stream(), film_init(), film_write_header(), film_write_packet(), find_stream(), flush_buffered(), flush_packet(), frm_read_packet(), get_private_data(), get_timebase(), has_duration(), hds_write_header(), hls_read_header(), hls_read_packet(), hls_read_seek(), hls_write_header(), id3_has_changed_values(), ifile_open(), imf_read_packet(), lavfi_read_header(), lavfi_read_packet(), log_slave(), main(), main(), match_streams_exact_id(), match_streams_one_to_one(), mcc_init(), mov_read_chapters(), mov_write_ttml_document_from_queue(), movie_common_init(), mpegts_push_data(), mpegts_write_packet_internal(), mv_read_packet(), mv_read_seek(), mxf_compute_index_tables(), mxf_parse_structural_metadata(), mxf_set_audio_pts(), nal_send(), next_duration(), of_add_metadata(), of_parse_group_token(), open_demux_for_component(), open_slave(), open_track_resource_context(), opus_header(), opus_packet(), output_segment_list(), pmt_cb(), probe_file(), rcwt_write_header(), read_gab2_sub(), read_packet(), read_thread(), real_seek(), reopen_demux_for_component(), report_new_stream(), rtcp_send_sr(), rtp_mpegts_write_header(), rtp_mpegts_write_packet(), rtp_send_ilbc(), rtp_write_header(), rtp_write_packet(), sap_fetch_packet(), sap_read_header(), sap_write_header(), sbg_read_packet(), sbg_read_seek2(), scc_write_header(), seg_check_bitstream(), seg_init(), set_disposition_bits(), srt_write_header(), stream_component_close(), stream_component_open(), tee_write_packet(), update_stream_extradata(), update_stream_timings(), update_streams_from_subdemuxer(), webm_chunk_write_header(), write_header(), write_headers(), and write_hls_media_playlist().
Number of elements in AVFormatContext.stream_groups.
Set by avformat_stream_group_create(), must not be modified by any other code.
Definition at line 1408 of file avformat.h.
Referenced by av_dump_format(), avformat_find_stream_info(), create_stream_groups(), dump_stream_group(), get_stream_group_index_from_id(), ifile_open(), of_parse_group_token(), of_parse_iamf_submixes(), and open_demux_for_component().
A list of all stream groups in the file.
New groups are created with avformat_stream_group_create(), and filled with avformat_stream_group_add_stream().
Freed by libavformat in avformat_free_context().
Definition at line 1420 of file avformat.h.
Referenced by avformat_find_stream_info(), create_stream_groups(), dump_stream_group(), get_stream_group_index_from_id(), ifile_open(), of_parse_group_token(), of_parse_iamf_submixes(), and open_demux_for_component().
Number of chapters in AVChapter array.
When muxing, chapters are normally written in the file header, so nb_chapters should normally be initialized before write_header is called. Some muxers (e.g. mov and mkv) can also write chapters in the trailer. To write chapters in the trailer, nb_chapters must be zero when write_header is called and non-zero when write_trailer is called.
Definition at line 1433 of file avformat.h.
Referenced by av_dump_format(), copy_chapters(), event_loop(), of_add_metadata(), ogm_chapter(), parse_forced_key_frames(), and write_headers().
Definition at line 1434 of file avformat.h.
Referenced by av_dump_format(), copy_chapters(), of_add_metadata(), ogm_chapter(), parse_forced_key_frames(), and write_chapter().
input or output URL.
Unlike the old filename field, this field has no length restriction.
Freed by libavformat in avformat_free_context().
Definition at line 1449 of file avformat.h.
Referenced by add_file(), append_single_file(), assert_file_overwrite(), at_write_header(), audio_read_header(), audio_read_header(), audio_write_header(), audio_write_header(), create_streams(), decklink_setup_video(), fbdev_read_header(), ff_decklink_list_formats(), ff_decklink_read_header(), ff_decklink_write_header(), ff_img_read_header(), ff_img_read_packet(), ff_rtsp_setup_output_streams(), fifo_init(), fifo_thread_write_header(), gdigrab_read_header(), hls_append_segment(), hls_delete_old_segments(), hls_mux_init(), hls_rename_temp_file(), hls_start(), hls_write_packet(), hls_write_trailer(), iec61883_read_header(), lavfi_read_header(), log_slave(), map_auto_audio(), map_auto_data(), map_auto_video(), of_open(), parse_device_name(), read_header(), seg_init(), seg_write_header(), seg_write_packet(), segment_end(), segment_start(), set_segment_filename(), sls_flag_file_rename(), sls_flag_use_localtime_filename(), sls_flags_filename_process(), start_jack(), tee_write_header(), webm_chunk_init(), and write_header().
Position of the first frame of the component, in AV_TIME_BASE fractional seconds.
NEVER set this value directly: It is deduced from the AVStream values.
Demuxing only, set by libavformat.
Definition at line 1458 of file avformat.h.
Referenced by av_dump_format(), estimate_timings(), event_loop(), fill_all_stream_timings(), ifile_open(), ist_filter_add(), movie_common_init(), read_thread(), rewind_file(), and update_stream_timings().
Duration of the stream, in AV_TIME_BASE fractional seconds.
Only set this value if you know none of the individual stream durations and also do not set any of them. This is deduced from the AVStream values if not set.
Demuxing only, set by libavformat.
Definition at line 1468 of file avformat.h.
Referenced by av_dump_format(), concat_read_header(), estimate_timings(), estimate_timings_from_bit_rate(), event_loop(), fill_all_stream_timings(), get_best_effort_duration(), has_duration(), ifile_open(), of_open(), process_command(), and update_stream_timings().
Total stream bitrate in bit/s, 0 if not available.
Never set it directly if the file_size and the duration are known as FFmpeg can compute it automatically.
Definition at line 1475 of file avformat.h.
Referenced by av_dump_format(), estimate_timings(), estimate_timings_from_bit_rate(), event_loop(), and update_stream_timings().
Definition at line 1477 of file avformat.h.
Referenced by rtp_write_header().
Definition at line 1478 of file avformat.h.
Referenced by create_rtp_muxer(), ff_rtp_chain_mux_open(), ff_rtp_send_aac(), ff_rtp_send_amr(), ff_rtp_send_xiph(), fifo_mux_init(), hls_mux_init(), of_open(), rtp_mpegts_write_header(), rtp_send_ilbc(), sap_read_header(), segment_mux_init(), and webm_chunk_init().
Flags modifying the (de)muxer behaviour.
A combination of AVFMT_FLAG_*. Set by the user before avformat_open_input() / avformat_write_header().
Definition at line 1484 of file avformat.h.
Referenced by android_camera_read_packet(), avformat_find_stream_info(), create_rtp_muxer(), fbdev_read_header(), fbdev_read_packet(), ff_img_read_header(), ff_rtp_chain_mux_open(), fifo_mux_init(), gdigrab_read_packet(), hls_mux_init(), hls_read_header(), ifile_open(), main(), mcc_write_header(), mov_write_isml_manifest(), of_open(), open_file(), open_slave(), open_track_resource_context(), read_thread(), reopen_demux_for_component(), rtp_write_header(), segment_mux_init(), webm_chunk_init(), and write_header().
Maximum number of bytes read from input in order to determine stream properties.
Used when reading the global header and in avformat_find_stream_info().
Demuxing only, set by the caller before avformat_open_input().
Definition at line 1532 of file avformat.h.
Referenced by avformat_find_stream_info(), hls_read_header(), lavfi_read_header(), and reopen_demux_for_component().
Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
Demuxing only, set by the caller before avformat_find_stream_info(). Can be set to 0 to let avformat choose using a heuristic.
Definition at line 1540 of file avformat.h.
Referenced by avformat_find_stream_info(), hls_read_header(), and reopen_demux_for_component().
Definition at line 1542 of file avformat.h.
Definition at line 1543 of file avformat.h.
Definition at line 1545 of file avformat.h.
Referenced by av_dump_format(), av_find_program_from_stream(), av_new_program(), av_program_add_stream_index2(), clear_avprogram(), discard_pid(), discard_unused_programs(), of_add_metadata(), open_slave(), pat_cb(), and update_stream_timings().
Definition at line 1546 of file avformat.h.
Referenced by av_dump_format(), av_find_program_from_stream(), av_new_program(), av_program_add_stream_index2(), clear_avprogram(), discard_pid(), discard_unused_programs(), of_add_metadata(), open_slave(), pat_cb(), and update_stream_timings().
Forced video codec_id.
Demuxing: Set by user.
Definition at line 1552 of file avformat.h.
Referenced by dshow_read_header(), ff_img_read_header(), and ifile_open().
Forced audio codec_id.
Demuxing: Set by user.
Definition at line 1558 of file avformat.h.
Referenced by audio_read_header(), ff_img_read_header(), and ifile_open().
Forced subtitle codec_id.
Demuxing: Set by user.
Definition at line 1564 of file avformat.h.
Referenced by ifile_open().
Forced Data codec_id.
Demuxing: Set by user.
Definition at line 1570 of file avformat.h.
Referenced by ifile_open().
Metadata that applies to the whole file.
Freed by libavformat in avformat_free_context().
Definition at line 1580 of file avformat.h.
Referenced by av_dump_format(), copy_meta(), ff_sauce_read(), ff_wms_parse_sdp_a_line(), fifo_mux_init(), handle_id3(), hls_mux_init(), hls_read_header(), hls_read_packet(), mxf_parse_structural_metadata(), of_add_metadata(), open_slave(), read_header(), read_string(), read_thread(), read_uint16(), read_uint32(), read_uint64(), read_uint8(), rtp_mpegts_write_header(), scan_file(), segment_mux_init(), var_read_metadata(), and webm_chunk_init().
Start time of the stream in real world time, in microseconds since the Unix epoch (00:00 1st January 1970).
That is, pts=0 in the stream was captured at this real world time.
Definition at line 1593 of file avformat.h.
Referenced by apply_sync_offsets(), create_rtp_muxer(), ff_rtp_chain_mux_open(), and rtp_write_header().
The number of frames used for determining the framerate in avformat_find_stream_info().
Demuxing only, set by the caller before avformat_find_stream_info().
Definition at line 1600 of file avformat.h.
Referenced by avformat_find_stream_info().
Error recognition; higher values will detect more errors but may misdetect some more or less valid parts as errors.
Demuxing only, set by the caller before avformat_open_input().
Definition at line 1607 of file avformat.h.
Referenced by mov_read_packet().
Custom interrupt callbacks for the I/O layer.
demuxing: set by the user before avformat_open_input(). muxing: set by the user before avformat_write_header() (mainly useful for AVFMT_NOFILE formats). The callback should also be passed to avio_open2() if it's used to open the file.
Definition at line 1618 of file avformat.h.
Referenced by avformat_find_stream_info(), create_rtp_muxer(), ff_rtp_chain_mux_open(), fifo_mux_init(), fifo_test_packet(), hls_mux_init(), hls_read_header(), ifile_open(), ism_seek(), lavfi_read_header(), LLVMFuzzerTestOneInput(), of_open(), open_file(), open_slave(), read_thread(), reopen_demux_for_component(), sap_read_header(), segment_mux_init(), and webm_chunk_init().
Flags to enable debugging.
Definition at line 1623 of file avformat.h.
The maximum number of streams.
Definition at line 1636 of file avformat.h.
Maximum amount of memory in bytes to use for the index of each stream.
If the index exceeds this size, entries will be discarded as needed to maintain a smaller size. This can lead to slower or less accurate seeking (depends on demuxer). Demuxers for which a full in-memory index is mandatory will ignore this.
Definition at line 1648 of file avformat.h.
Maximum amount of memory in bytes to use for buffering frames obtained from realtime capture devices.
Definition at line 1654 of file avformat.h.
Maximum buffering duration for interleaving.
To ensure all the streams are interleaved correctly, av_interleaved_write_frame() will wait until it has at least one packet for each stream before actually writing any packets to the output file. When some streams are "sparse" (i.e. there are large gaps between successive packets), this can result in excessive buffering.
This field specifies the maximum difference between the timestamps of the first and the last packet in the muxing queue, above which libavformat will output a packet regardless of whether it has queued a packet for all the streams.
Muxing only, set by the caller before avformat_write_header().
Definition at line 1672 of file avformat.h.
Maximum number of packets to read while waiting for the first timestamp.
Decoding only.
Definition at line 1678 of file avformat.h.
Referenced by avformat_find_stream_info().
Max chunk time in microseconds.
Note, not all formats support this and unpredictable things may happen if it is used when not supported.
Definition at line 1686 of file avformat.h.
Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it is used when not supported.
Definition at line 1694 of file avformat.h.
Maximum number of packets that can be probed.
Definition at line 1701 of file avformat.h.
Allow non-standard and experimental extension.
Definition at line 1707 of file avformat.h.
Referenced by create_rtp_muxer(), ff_rtp_chain_mux_open(), hls_mux_init(), mov_write_video_tag(), open_slave(), rtp_write_header(), and webm_chunk_init().
Flags indicating events happening on the file, a combination of AVFMT_EVENT_FLAG_*.
Definition at line 1720 of file avformat.h.
Referenced by hls_read_packet(), and read_thread().
Avoid negative timestamps during muxing.
Any value of the AVFMT_AVOID_NEG_TS_* constants. Note, this works better when using av_interleaved_write_frame().
Definition at line 1737 of file avformat.h.
Referenced by seg_init(), and webm_chunk_init().
Audio preload in microseconds.
Note, not all formats support this and unpredictable things may happen if it is used when not supported.
Definition at line 1749 of file avformat.h.
forces the use of wallclock timestamps as pts/dts of packets This has undefined results in the presence of B frames.
Definition at line 1757 of file avformat.h.
Skip duration calculation in estimate_timings_from_pts.
Definition at line 1766 of file avformat.h.
Referenced by estimate_timings_from_pts().
avio flags, used to force AVIO_FLAG_DIRECT.
Definition at line 1773 of file avformat.h.
The duration field can be estimated through various ways, and this field can be used to know how the duration was estimated.
Definition at line 1781 of file avformat.h.
Referenced by estimate_timings().
Skip initial bytes when opening stream.
Definition at line 1788 of file avformat.h.
Correct single timestamp overflows.
Definition at line 1795 of file avformat.h.
Force seeking to any (also non key) frames.
Definition at line 1802 of file avformat.h.
Flush the I/O context after each packet.
Definition at line 1809 of file avformat.h.
Referenced by webm_chunk_init().
format probing score.
The maximal score is AVPROBE_SCORE_MAX, its set when the demuxer probes the format.
Definition at line 1818 of file avformat.h.
Maximum number of bytes read from input in order to identify the input format.
Only used when the format is not set explicitly by the caller.
Demuxing only, set by the caller before avformat_open_input().
Definition at line 1829 of file avformat.h.
',' separated list of allowed decoders.
If NULL then all are allowed
Definition at line 1837 of file avformat.h.
Referenced by avformat_find_stream_info().
',' separated list of allowed demuxers.
If NULL then all are allowed
Definition at line 1845 of file avformat.h.
',' separated list of allowed protocols.
Definition at line 1852 of file avformat.h.
Referenced by ism_seek(), and lavfi_read_header().
',' separated list of disallowed protocols.
Definition at line 1859 of file avformat.h.
Referenced by ism_seek().
IO repositioned flag.
This is set by avformat when the underlying IO context read pointer is repositioned, for example when doing byte based seeking. Demuxers can use the flag to detect such changes.
Definition at line 1867 of file avformat.h.
Forced video codec.
This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user
Definition at line 1875 of file avformat.h.
Referenced by ifile_open().
Forced audio codec.
This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user
Definition at line 1883 of file avformat.h.
Referenced by ifile_open().
Forced subtitle codec.
This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user
Definition at line 1891 of file avformat.h.
Referenced by ifile_open().
Forced data codec.
This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user
Definition at line 1899 of file avformat.h.
Referenced by ifile_open().
Number of bytes to be written as padding in a metadata header.
Demuxing: Unused. Muxing: Set by user.
Definition at line 1906 of file avformat.h.
User data.
This is a place for some private data of the user.
Definition at line 1912 of file avformat.h.
Referenced by fifo_mux_init(), hls_mux_init(), open_slave(), open_track_resource_context(), and segment_mux_init().
Callback used by devices to communicate with application.
Definition at line 1917 of file avformat.h.
Output timestamp offset, in microseconds.
Muxing: set by user
Definition at line 1923 of file avformat.h.
dump format separator.
can be ", " or "\n " or anything else
Definition at line 1931 of file avformat.h.
Referenced by dump_stream_format(), and dump_stream_group().
A callback for opening new IO streams.
Whenever a muxer or a demuxer needs to open an IO stream (typically from avformat_open_input() for demuxers, but for certain formats can happen at other times as well), it will call this callback to obtain an IO context.
Definition at line 1953 of file avformat.h.
Referenced by ff_img_read_packet(), fifo_mux_init(), hls_mux_init(), hls_read_header(), init_subtitle_context(), open_slave(), open_track_resource_context(), read_header(), reopen_demux_for_component(), seg_write_header(), and segment_mux_init().
A callback for closing the streams opened with AVFormatContext.io_open().
Definition at line 1963 of file avformat.h.
Referenced by fifo_mux_init(), hls_mux_init(), open_slave(), open_track_resource_context(), and segment_mux_init().
Maximum number of bytes read from input in order to determine stream durations when using estimate_timings_from_pts in avformat_find_stream_info().
Demuxing only, set by the caller before avformat_find_stream_info(). Can be set to 0 to let avformat choose using a heuristic.
Definition at line 1973 of file avformat.h.
Referenced by estimate_timings_from_pts().
Name of this format context, only used for logging purposes.
Definition at line 1978 of file avformat.h.
Referenced by ifile_open().
Depth recursion limit,.
The maximum recursion depth that a Demuxer can open a Demuxer within itself.
Definition at line 1987 of file avformat.h.