AVFormatContext Struct Reference

Format I/O context. More...

#include <avformat.h>

Data Fields
const AVClass *	av_class
	A class for logging and AVOptions.
struct AVInputFormat *	iformat
	The input container format.
struct AVOutputFormat *	oformat
	The output container format.
void *	priv_data
	Format private data.
AVIOContext *	pb
	I/O context.
int	ctx_flags
	Format-specific flags, see AVFMTCTX_xx.
unsigned int	nb_streams
	Number of elements in AVFormatContext.streams.
AVStream **	streams
	A list of all streams in the file.
char	filename [1024]
	input or output filename
int64_t	start_time
	Position of the first frame of the component, in AV_TIME_BASE fractional seconds.
int64_t	duration
	Duration of the stream, in AV_TIME_BASE fractional seconds.
int	bit_rate
	Total stream bitrate in bit/s, 0 if not available.
unsigned int	packet_size
int	max_delay
int	flags
unsigned int	probesize
	Maximum size of the data read from input for determining the input container format.
int	max_analyze_duration
	Maximum duration (in AV_TIME_BASE units) of the data read from input in avformat_find_stream_info().
const uint8_t *	key
int	keylen
unsigned int	nb_programs
AVProgram **	programs
enum AVCodecID	video_codec_id
	Forced video codec_id.
enum AVCodecID	audio_codec_id
	Forced audio codec_id.
enum AVCodecID	subtitle_codec_id
	Forced subtitle codec_id.
unsigned int	max_index_size
	Maximum amount of memory in bytes to use for the index of each stream.
unsigned int	max_picture_buffer
	Maximum amount of memory in bytes to use for buffering frames obtained from realtime capture devices.
unsigned int	nb_chapters
	Number of chapters in AVChapter array.
AVChapter **	chapters
AVDictionary *	metadata
	Metadata that applies to the whole file.
int64_t	start_time_realtime
	Start time of the stream in real world time, in microseconds since the Unix epoch (00:00 1st January 1970).
int	fps_probe_size
	The number of frames used for determining the framerate in avformat_find_stream_info().
int	error_recognition
	Error recognition; higher values will detect more errors but may misdetect some more or less valid parts as errors.
AVIOInterruptCB	interrupt_callback
	Custom interrupt callbacks for the I/O layer.
int	debug
	Flags to enable debugging.
int64_t	max_interleave_delta
	Maximum buffering duration for interleaving.
int	ts_id
	Transport stream id.
int	audio_preload
	Audio preload in microseconds.
int	max_chunk_duration
	Max chunk time in microseconds.
int	max_chunk_size
	Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it is used when not supported.
int	use_wallclock_as_timestamps
	forces the use of wallclock timestamps as pts/dts of packets This has undefined results in the presence of B frames.
int	avoid_negative_ts
	Avoid negative timestamps during muxing.
int	avio_flags
	avio flags, used to force AVIO_FLAG_DIRECT.
enum AVDurationEstimationMethod	duration_estimation_method
	The duration field can be estimated through various ways, and this field can be used to know how the duration was estimated.
unsigned int	skip_initial_bytes
	Skip initial bytes when opening stream.
unsigned int	correct_ts_overflow
	Correct single timestamp overflows.
int	seek2any
	Force seeking to any (also non key) frames.
int	flush_packets
	Flush the I/O context after each packet.
int	probe_score
	format probing score.
struct AVPacketList *	packet_buffer
	This buffer is only needed when packets were already buffered but not decoded, for example to get the codec parameters in MPEG streams.
struct AVPacketList *	packet_buffer_end
int64_t	data_offset
	offset of the first packet
struct AVPacketList *	raw_packet_buffer
	Raw packets from the demuxer, prior to parsing and decoding.
struct AVPacketList *	raw_packet_buffer_end
struct AVPacketList *	parse_queue
	Packets split by the parser get queued here.
struct AVPacketList *	parse_queue_end
int	raw_packet_buffer_remaining_size
int64_t	offset
	Offset to remap timestamps to be non-negative.
AVRational	offset_timebase
	Timebase for the timestamp offset.
AVFormatInternal *	internal
	An opaque field for libavformat internal usage.
int	io_repositioned
	IO repositioned flag.
AVCodec *	video_codec
	Forced video codec.
AVCodec *	audio_codec
	Forced audio codec.
AVCodec *	subtitle_codec
	Forced subtitle codec.
int	metadata_header_padding
	Number of bytes to be written as padding in a metadata header.
void *	opaque
	User data.
av_format_control_message	control_message_cb
	Callback used by devices to communicate with application.
int64_t	output_ts_offset
	Output timestamp offset, in microseconds.

Detailed Description

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.

Examples:

avio_reading.c, demuxing_decoding.c, filtering_audio.c, filtering_video.c, metadata.c, muxing.c, remuxing.c, and transcode_aac.c.

Definition at line 1075 of file avformat.h.

Field Documentation

const AVClass* AVFormatContext::av_class

A class for logging and AVOptions.

Set by avformat_alloc_context(). Exports (de)muxer private options if they exist.

Definition at line 1080 of file avformat.h.

Referenced by avformat_get_context_defaults(), and avformat_open_input().

struct AVInputFormat* AVFormatContext::iformat

The input container format.

Demuxing only, set by avformat_open_input().

Definition at line 1087 of file avformat.h.

Referenced by adts_aac_read_header(), adx_read_header(), av_demuxer_open(), av_dump_format(), av_read_frame(), av_read_pause(), av_read_play(), av_seek_frame(), avdevice_list_devices(), avformat_close_input(), avformat_find_stream_info(), avformat_free_context(), avformat_new_stream(), avformat_open_input(), avformat_seek_file(), compute_pkt_fields(), dump_stream_format(), estimate_timings(), ff_raw_audio_read_header(), ff_raw_data_read_header(), ff_raw_video_read_header(), ff_read_packet(), ff_seek_frame_binary(), format_child_next(), format_to_name(), get_category(), gsm_read_header(), img_read_header(), init_input(), is_realtime(), loas_read_header(), mpegts_read_header(), open_input_stream(), pcm_read_header(), process_input(), rawvideo_read_header(), read_frame_internal(), read_thread(), seek_frame_generic(), seek_frame_internal(), show_format(), and show_stream().

struct AVOutputFormat* AVFormatContext::oformat

The output container format.

Muxing only, must be set by the caller before avformat_write_header().

Examples:

muxing.c.

Definition at line 1094 of file avformat.h.

Referenced by add_stream(), av_dump_format(), av_get_output_timestamp(), av_interleaved_write_frame(), av_write_frame(), av_write_trailer(), av_write_uncoded_frame_internal(), av_write_uncoded_frame_query(), avdevice_app_to_dev_control_message(), avdevice_list_devices(), avformat_alloc_output_context2(), avformat_write_header(), build_feed_streams(), choose_encoder(), close_connection(), compute_pkt_fields2(), do_video_out(), dump_stream_format(), ff_rtp_chain_mux_open(), ff_rtp_get_payload_type(), ff_rtsp_open_transport_ctx(), ff_rtsp_undo_setup(), ffmpeg_cleanup(), filter_codec_opts(), flush_encoders(), force_one_stream(), format_child_next(), format_to_name(), hds_write_header(), hls_mux_init(), hls_start(), http_prepare_data(), init_muxer(), interleave_packet(), ism_write_header(), log_slave(), main(), mkv_write_header(), mov_write_header(), mpeg_mux_init(), mpegts_write_header(), mxf_parse_mpeg2_frame(), mxf_write_header(), mxf_write_packet(), new_output_stream(), open_output_file(), open_slave(), prepare_sdp_description(), rtp_new_av_stream(), segment_mux_init(), segment_start(), swf_write_header(), tee_write_trailer(), transcode_init(), validate_codec_tag(), write_frame(), write_header(), write_packet(), and write_video_frame().

void* AVFormatContext::priv_data

Format private data.

This is an AVOptions-enabled struct if and only if iformat/oformat.priv_class is not NULL.

• muxing: set by avformat_write_header()
• demuxing: set by avformat_open_input()

Definition at line 1103 of file avformat.h.

Referenced by add_file(), adjust_write_index(), adts_write_header(), adts_write_packet(), adts_write_trailer(), adx_read_header(), adx_read_packet(), afc_read_header(), afc_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_packet(), aiff_write_trailer(), amf_parse_object(), ape_read_close(), ape_read_header(), ape_read_packet(), ape_read_seek(), aqt_read_close(), aqt_read_header(), aqt_read_packet(), aqt_read_seek(), asf_build_simple_index(), asf_get_packet(), asf_parse_packet(), asf_read_ext_content_desc(), asf_read_ext_stream_properties(), asf_read_file_properties(), asf_read_frame_header(), asf_read_header(), asf_read_language_list(), asf_read_marker(), asf_read_metadata(), asf_read_packet(), asf_read_pts(), asf_read_seek(), asf_read_stream_properties(), asf_reset_header(), asf_write_header(), asf_write_header1(), asf_write_markers(), asf_write_packet(), asf_write_stream_header(), asf_write_trailer(), asfrtp_parse_packet(), asfrtp_parse_sdp_line(), ass_read_close(), ass_read_header(), ass_read_packet(), ass_read_seek(), ast_write_header(), ast_write_packet(), ast_write_trailer(), audio_get_output_timestamp(), audio_open(), audio_read_close(), audio_read_header(), audio_read_packet(), audio_write_frame(), audio_write_header(), audio_write_packet(), audio_write_trailer(), av_write_trailer(), avformat_alloc_output_context2(), avformat_free_context(), avformat_open_input(), avi_load_index(), 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(), avisynth_context_create(), avisynth_create_stream(), avisynth_create_stream_audio(), avisynth_create_stream_video(), avisynth_next_stream(), avisynth_open_file(), avisynth_read_close(), avisynth_read_packet(), avisynth_read_packet_audio(), avisynth_read_packet_video(), avisynth_read_seek(), avs_read_audio_packet(), avs_read_header(), avs_read_packet(), avs_read_video_packet(), bfi_read_header(), bfi_read_packet(), bmv_read_close(), bmv_read_header(), bmv_read_packet(), build_elision_headers(), build_feed_streams(), build_frame_code(), caca_write_header(), caca_write_packet(), caca_write_trailer(), caf_write_header(), caf_write_packet(), caf_write_trailer(), callback(), cdata_read_header(), cdata_read_packet(), cdxl_read_header(), cdxl_read_packet(), celt_header(), check_sessionid(), cin_read_header(), cin_read_packet(), close_connection(), close_slaves(), compute_moov_size(), compute_overlay_rect(), concat_read_close(), concat_read_header(), concat_read_packet(), concat_seek(), convert_timestamp(), crc_write_header(), crc_write_packet(), crc_write_trailer(), dc1394_read_common(), decklink_setup_audio(), decklink_setup_video(), decklink_write_audio_packet(), decklink_write_video_packet(), decrypt_init(), device_init(), device_open(), dirac_gptopts(), dirac_header(), dshow_add_device(), dshow_cycle_devices(), dshow_cycle_formats(), dshow_cycle_pins(), dshow_list_device_options(), dshow_open_device(), dshow_read_close(), dshow_read_header(), dshow_read_packet(), dshow_set_audio_buffer_size(), dtshd_read_header(), dv1394_close(), dv1394_read_header(), dv1394_read_packet(), dv_init_mux(), dv_read_close(), dv_read_header(), dv_read_packet(), dv_read_seek(), dv_read_timecode(), dv_write_header(), dv_write_packet(), dv_write_trailer(), dxa_read_header(), dxa_read_packet(), ea_read_header(), ea_read_packet(), efi_read(), enable_tracks(), event_thread(), fbdev_read_close(), fbdev_read_header(), fbdev_read_packet(), fbdev_write_header(), fbdev_write_packet(), fbdev_write_trailer(), ff_alsa_close(), ff_alsa_open(), ff_alsa_xrun_recover(), ff_decklink_write_header(), ff_decklink_write_packet(), ff_decklink_write_trailer(), ff_mov_add_hinted_packet(), ff_mov_init_hinting(), ff_mov_write_packet(), ff_raw_video_read_header(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), 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(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_rtp_send_mpegvideo(), ff_rtp_send_vp8(), ff_rtp_send_xiph(), ff_rtsp_close_streams(), ff_rtsp_open_transport_ctx(), ff_rtsp_parse_streaming_commands(), ff_rtsp_setup_input_streams(), ff_rtsp_setup_output_streams(), ff_rtsp_tcp_read_packet(), ff_rtsp_tcp_write_packet(), ff_rtsp_undo_setup(), ff_sndio_open(), ff_voc_get_packet(), ff_wms_parse_sdp_a_line(), ffm2_read_header(), ffm_is_avail_data(), ffm_read_data(), ffm_read_header(), ffm_read_packet(), ffm_seek(), ffm_seek1(), ffm_set_write_index(), ffm_write_data(), ffm_write_header(), ffm_write_packet(), ffm_write_trailer(), film_read_close(), film_read_header(), film_read_packet(), find_header_idx(), finish_chunk(), finish_chunk_noindex(), finish_file(), flac_header(), flac_write_header(), flac_write_trailer(), flush_packet(), flv_read_close(), flv_read_packet(), flv_read_seek(), flv_write_header(), flv_write_packet(), flv_write_trailer(), format_child_next(), fourxm_read_close(), fourxm_read_header(), fourxm_read_packet(), frm_read_packet(), g729_read_header(), get_aiff_header(), get_moov_size(), get_packet_header(), get_riff(), get_system_header_size(), get_vcd_padding_size(), gif_read_ext(), gif_read_header(), gif_read_packet(), gif_write_header(), gif_write_packet(), gif_write_trailer(), grab_read_close(), grab_read_header(), grab_read_packet(), gsm_read_header(), gxf_compare_field_nb(), gxf_header(), gxf_packet(), gxf_write_flt_packet(), gxf_write_header(), gxf_write_map_packet(), gxf_write_material_data_section(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_track_description(), gxf_write_track_description_section(), gxf_write_trailer(), gxf_write_umf_material_description(), gxf_write_umf_media_description(), gxf_write_umf_packet(), gxf_write_umf_payload(), gxf_write_umf_track_description(), hds_flush(), hds_free(), hds_write_header(), hds_write_packet(), hds_write_trailer(), hls_close(), hls_mux_init(), hls_read_header(), hls_read_packet(), hls_read_seek(), hls_start(), hls_window(), hls_write_header(), hls_write_packet(), hls_write_trailer(), hnm_read_close(), hnm_read_header(), hnm_read_packet(), ico_write_header(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), idcin_read_packet(), idcin_read_seek(), iec61883_close(), iec61883_read_header(), iec61883_read_packet(), iff_read_header(), iff_read_packet(), img_read_close(), img_read_header(), img_read_packet(), img_read_seek(), init_convert_timestamp(), init_muxer(), init_stream(), ipmovie_read_header(), ipmovie_read_packet(), ism_flush(), ism_free(), ism_write_header(), ism_write_packet(), ism_write_trailer(), iss_read_header(), iss_read_packet(), jacosub_read_close(), jacosub_read_header(), jacosub_read_packet(), jacosub_read_seek(), kset(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), lavfi_read_close(), lavfi_read_header(), lavfi_read_packet(), libquvi_close(), libquvi_read_header(), libquvi_read_packet(), libquvi_read_seek(), list_formats(), list_standards(), load_metadata(), lxf_read_header(), lxf_read_packet(), matroska_convert_tags(), matroska_read_close(), matroska_read_header(), matroska_read_packet(), matroska_read_seek(), md5_finish(), microdvd_read_close(), microdvd_read_header(), microdvd_read_packet(), microdvd_read_seek(), mkv_flush_dynbuf(), mkv_write_attachments(), mkv_write_block(), mkv_write_chapters(), mkv_write_flush_packet(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tag(), mkv_write_tags(), mkv_write_tracks(), mkv_write_trailer(), mkv_write_vtt_blocks(), mmap_init(), mmap_read_frame(), mmap_start(), mmf_read_header(), mmf_read_packet(), modplug_load_metadata(), modplug_read_close(), modplug_read_header(), modplug_read_packet(), modplug_read_seek(), mov_create_chapter_track(), mov_create_timecode_track(), mov_flush_fragment(), mov_free(), mov_read_chapters(), mov_read_close(), mov_read_header(), mov_read_packet(), mov_write_ftyp_tag(), mov_write_header(), mov_write_packet(), mov_write_single_packet(), mov_write_trailer(), mp3_parse_vbr_tags(), mp3_queue_flush(), mp3_read_header(), mp3_read_packet(), mp3_seek(), mp3_update_xing(), mp3_write_audio_packet(), mp3_write_trailer(), mp3_write_xing(), mpc8_parse_seektable(), mpc8_read_header(), mpc8_read_packet(), mpc_read_close(), mpc_read_header(), mpc_read_packet(), mpc_read_seek(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegps_read_header(), mpegps_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), mpegts_get_pcr(), mpegts_insert_pcr_only(), mpegts_prefix_m2ts_header(), mpegts_raw_read_packet(), mpegts_read_close(), mpegts_read_header(), mpegts_read_packet(), mpegts_resync(), mpegts_write_end(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pat(), mpegts_write_pes(), mpegts_write_pmt(), mpegts_write_sdt(), mpl2_read_close(), mpl2_read_header(), mpl2_read_packet(), mpl2_read_seek(), mpsub_read_close(), mpsub_read_header(), mpsub_read_packet(), mpsub_read_seek(), mtv_read_header(), mtv_read_packet(), mv_read_header(), mv_read_packet(), mv_read_seek(), mxf_decrypt_triplet(), mxf_gen_umid(), mxf_handle_small_eubc(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_read_close(), mxf_read_header(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_random_index_pack(), mxf_read_seek(), mxf_write_common_fields(), mxf_write_d10_audio_packet(), mxf_write_d10_video_packet(), mxf_write_essence_container_refs(), mxf_write_footer(), mxf_write_generic_desc(), mxf_write_header(), mxf_write_identification(), mxf_write_index_table_segment(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_packet(), mxf_write_partition(), mxf_write_preface(), mxf_write_random_index_pack(), mxf_write_sequence(), mxf_write_system_item(), mxf_write_timecode_component(), mxf_write_track(), mxf_write_umid(), mxg_close(), mxg_read_header(), mxg_read_packet(), mxg_update_cache(), nal_send(), nprobe(), nsv_parse_NSVf_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nsv_read_header(), nsv_read_packet(), nsv_read_seek(), nsv_resync(), nut_read_close(), nut_read_header(), nut_read_packet(), nut_read_seek(), nut_read_timestamp(), nut_write_header(), nut_write_packet(), nut_write_trailer(), nuv_header(), nuv_packet(), nuv_read_dts(), ogg_buffer_data(), ogg_buffer_page(), ogg_calc_pts(), ogg_get_length(), ogg_gptopts(), ogg_new_stream(), ogg_packet(), ogg_read_close(), ogg_read_header(), ogg_read_packet(), ogg_read_page(), ogg_read_seek(), ogg_read_timestamp(), ogg_replace_stream(), ogg_reset(), ogg_restore(), ogg_save(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_pages(), ogm_dshow_header(), ogm_header(), ogm_packet(), old_dirac_gptopts(), old_dirac_header(), old_flac_header(), oma_read_header(), oma_read_packet(), oma_read_seek(), open_file(), open_next_file(), opengl_compute_display_area(), opengl_control_message(), opengl_create_window(), opengl_draw(), opengl_prepare_vertex(), opengl_release_window(), opengl_resize(), opengl_write_header(), opengl_write_trailer(), opus_header(), opus_packet(), output_packet(), parse_chunks(), parse_command_line(), parse_device_name(), parse_global_var(), parse_keyframes_index(), parse_media_type(), parse_videoinfoheader2(), pcm_read_header(), pjs_read_close(), pjs_read_header(), pjs_read_packet(), pjs_read_seek(), pmp_close(), pmp_header(), pmp_packet(), pmp_seek(), process_audio_header_eacs(), process_audio_header_elements(), process_audio_header_sead(), process_ea_header(), process_video_header_cmv(), process_video_header_mdec(), process_video_header_vp6(), pulse_close(), pulse_get_output_timestamp(), pulse_read_header(), pulse_read_packet(), pulse_write_header(), pulse_write_packet(), pulse_write_trailer(), put_chunk(), put_frame(), put_pack_header(), put_padding_packet(), put_payload_header(), put_payload_parsing_info(), put_swf_end_tag(), put_swf_tag(), put_system_header(), put_vcd_padding_sector(), pva_read_timestamp(), qcp_read_header(), qcp_read_packet(), r3d_close(), r3d_read_header(), r3d_read_rdvo(), r3d_read_reos(), r3d_seek(), raw_read_packet(), rawvideo_read_header(), read_braindead_odml_indx(), read_close(), read_close_gme(), read_data(), read_desc_chunk(), read_header(), read_header_gme(), read_line(), read_packet(), read_packet_gme(), read_pakt_chunk(), read_part_of_packet(), read_seek(), read_seek_gme(), read_xing_toc(), real_seek(), realtext_read_close(), realtext_read_header(), realtext_read_packet(), realtext_read_seek(), recheck_discard_flags(), redspark_read_header(), redspark_read_packet(), resetup_tcp(), retransmit_si_info(), rl2_read_packet(), rl2_read_seek(), rm_read_dts(), rm_read_header(), rm_read_header_old(), rm_read_packet(), rm_read_seek(), rm_write_audio(), rm_write_header(), rm_write_trailer(), rm_write_video(), roq_read_header(), roq_read_packet(), rpl_read_header(), rpl_read_packet(), rprobe(), rtcp_send_sr(), 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(), rtsp_listen(), rtsp_read_announce(), rtsp_read_close(), rtsp_read_header(), rtsp_read_options(), rtsp_read_packet(), rtsp_read_pause(), rtsp_read_play(), rtsp_read_record(), rtsp_read_request(), rtsp_read_seek(), rtsp_read_setup(), rtsp_send_reply(), rtsp_write_close(), rtsp_write_packet(), rtsp_write_record(), rv10_write_header(), sami_read_close(), sami_read_header(), sami_read_packet(), sami_read_seek(), sap_fetch_packet(), sap_read_close(), sap_read_header(), sap_write_close(), sap_write_header(), sap_write_packet(), sbg_read_header(), sdl_write_header(), sdl_write_packet(), sdl_write_trailer(), seg_write_header(), seg_write_packet(), seg_write_trailer(), segment_end(), segment_list_open(), segment_mux_init(), segment_start(), select_reference_stream(), send_mode_a(), send_mode_b(), seq_read_close(), seq_read_header(), seq_read_packet(), set_segment_filename(), shall_we_drop(), shift_data(), siff_read_header(), siff_read_packet(), skeleton_header(), skip_to_key(), smacker_read_close(), smacker_read_header(), smacker_read_packet(), smjpeg_read_header(), smjpeg_read_packet(), smjpeg_write_packet(), smjpeg_write_trailer(), smush_read_header(), smush_read_packet(), sox_write_header(), sox_write_trailer(), spdif_header_aac(), spdif_header_ac3(), spdif_header_dts(), spdif_header_dts4(), spdif_header_eac3(), spdif_header_mpeg(), spdif_header_truehd(), spdif_write_header(), spdif_write_packet(), spdif_write_trailer(), speex_header(), speex_packet(), srt_read_close(), srt_read_header(), srt_read_packet(), srt_read_seek(), srt_write_header(), srt_write_packet(), start_jack(), str_read_close(), str_read_header(), str_read_packet(), subviewer1_read_close(), subviewer1_read_header(), subviewer1_read_packet(), subviewer1_read_seek(), subviewer_read_close(), subviewer_read_header(), subviewer_read_packet(), subviewer_read_seek(), swf_read_header(), swf_read_packet(), swf_write_audio(), swf_write_header(), swf_write_trailer(), swf_write_video(), sync(), tak_read_header(), tedcaptions_read_close(), tedcaptions_read_header(), tedcaptions_read_packet(), tedcaptions_read_seek(), tee_write_header(), tee_write_packet(), tee_write_trailer(), theora_gptopts(), theora_header(), theora_packet(), thp_read_header(), thp_read_packet(), tmv_read_header(), tmv_read_packet(), tmv_read_seek(), try_seek(), tta_read_header(), tta_read_packet(), tta_read_seek(), update_index(), v4l2_read_close(), v4l2_read_header(), v4l2_read_packet(), v4l2_set_parameters(), vc1test_write_packet(), vc1test_write_trailer(), vfw_read_close(), vfw_read_header(), vfw_read_packet(), vid_read_close(), vid_read_header(), vid_read_packet(), videostream_cb(), vivo_get_packet_header(), vivo_read_header(), vivo_read_packet(), vmd_read_close(), vmd_read_header(), vmd_read_packet(), voc_read_header(), voc_write_packet(), vorbis_cleanup(), vorbis_header(), vorbis_packet(), vorbis_update_metadata(), vp8_gptopts(), vp8_header(), vp8_packet(), vplayer_read_close(), vplayer_read_header(), vplayer_read_packet(), vplayer_read_seek(), vqf_read_header(), vqf_read_packet(), vqf_read_seek(), wc3_read_close(), wc3_read_header(), wc3_read_packet(), webvtt_read_close(), webvtt_read_header(), webvtt_read_packet(), webvtt_read_seek(), write_abst(), write_chunk_header(), write_chunk_header2(), write_header(), write_headers(), write_index(), write_manifest(), write_packet(), write_picture(), write_root_table(), write_section_data(), write_streamheader(), write_sync(), write_table_entries_attrib(), write_table_entries_events(), write_table_entries_time(), write_table_redirector_legacy_attrib(), write_timestamp(), write_trailer(), wsvqa_read_header(), wsvqa_read_packet(), wv_read_block_header(), wv_read_header(), wv_read_packet(), wv_read_seek(), wv_write_packet(), wv_write_trailer(), x11grab_read_close(), x11grab_read_header(), x11grab_read_packet(), xa_read_header(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_new_packet(), xmv_fetch_video_packet(), xmv_process_packet_header(), xmv_read_close(), xmv_read_header(), xmv_read_packet(), xv_write_header(), xv_write_trailer(), xwma_read_header(), xwma_read_packet(), yop_read_close(), yop_read_header(), yop_read_packet(), and yop_read_seek().

AVIOContext* AVFormatContext::pb

I/O context.

• demuxing: either set by the user before avformat_open_input() (then the user must close it manually) or set by avformat_open_input().
• muxing: set by the user before avformat_write_header(). The caller must take care of closing / freeing the IO 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.

Examples:

avio_reading.c, and muxing.c.

Definition at line 1117 of file avformat.h.

Referenced by a64_write_header(), add_metadata(), adjust_write_index(), adp_read_header(), adp_read_packet(), adts_aac_read_header(), adts_write_packet(), adx_read_header(), adx_read_packet(), aea_read_header(), aea_read_packet(), afc_read_header(), afc_read_packet(), aiff_read_header(), aiff_read_packet(), aiff_write_header(), aiff_write_packet(), aiff_write_trailer(), amf_parse_object(), amr_read_header(), amr_read_packet(), apc_read_header(), apc_read_packet(), ape_read_header(), ape_read_packet(), ape_read_seek(), ape_tag_read_field(), aqt_read_header(), asf_build_simple_index(), asf_read_content_desc(), asf_read_ext_content_desc(), asf_read_ext_stream_properties(), asf_read_file_properties(), asf_read_header(), asf_read_language_list(), asf_read_marker(), asf_read_metadata(), asf_read_packet(), asf_read_picture(), asf_read_pts(), asf_read_seek(), asf_read_stream_properties(), asf_write_header(), asf_write_header1(), asf_write_index(), asf_write_markers(), asf_write_packet(), asf_write_trailer(), asfrtp_parse_packet(), ass_read_header(), ast_read_header(), ast_read_packet(), ast_write_header(), ast_write_packet(), ast_write_trailer(), av_demuxer_open(), av_interleaved_write_frame(), av_read_pause(), av_read_play(), av_write_frame(), av_write_trailer(), avformat_close_input(), avformat_find_stream_info(), avformat_open_input(), avformat_write_header(), avi_load_index(), avi_read_close(), avi_read_header(), avi_read_idx1(), avi_read_nikon(), avi_read_packet(), avi_read_seek(), avi_read_tag(), avi_sync(), avi_write_counters(), avi_write_header(), avi_write_idx1(), avi_write_ix(), avi_write_packet(), avi_write_trailer(), avr_read_header(), avs_read_audio_packet(), avs_read_header(), avs_read_packet(), avs_read_video_packet(), bfi_read_header(), bfi_read_packet(), bmv_read_packet(), build_feed_streams(), caf_write_header(), caf_write_packet(), caf_write_trailer(), cdata_read_header(), cdata_read_packet(), cdxl_read_packet(), check(), cin_read_header(), cin_read_packet(), close_connection(), close_slaves(), concat_read_header(), crc_write_trailer(), daud_packet(), daud_write_packet(), decode_frame(), decode_frame_header(), decode_info_header(), decode_main_header(), decode_stream_header(), decode_syncpoint(), dfa_read_header(), dfa_read_packet(), dtshd_read_header(), dv_frame_offset(), dv_read_header(), dv_read_packet(), dv_read_seek(), dv_read_timecode(), dv_write_packet(), dxa_read_header(), dxa_read_packet(), ea_read_packet(), ebml_level_end(), ebml_parse(), ebml_parse_elem(), ebml_read_master(), efi_read(), epaf_read_header(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), event_loop(), ff_ape_parse_tag(), ff_ape_write_tag(), ff_find_last_ts(), ff_framehash_write_header(), ff_gen_syncpoint_search(), ff_id3v1_read(), ff_id3v2_read(), ff_id3v2_write_apic(), ff_id3v2_write_metadata(), ff_id3v2_write_simple(), ff_mov_add_hinted_packet(), ff_mov_close_hinting(), ff_mov_write_packet(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_raw_read_partial_packet(), ff_raw_write_packet(), ff_read_riff_info(), ff_restore_parser_state(), ff_riff_write_info(), ff_rtp_chain_mux_open(), ff_rtp_send_data(), ff_rtsp_tcp_write_packet(), ff_rtsp_undo_setup(), ff_sauce_read(), ff_seek_frame_binary(), ff_spdif_read_packet(), ff_store_parser_state(), ff_voc_get_packet(), ff_wms_parse_sdp_a_line(), ffm2_read_header(), ffm_is_avail_data(), ffm_read_data(), ffm_read_header(), ffm_read_packet(), ffm_resync(), ffm_seek1(), ffm_write_header(), ffmpeg_cleanup(), film_read_header(), film_read_packet(), find_and_decode_index(), finish_chunk_noindex(), finish_file(), finished_reading_packet(), flac_read_header(), flac_write_header(), flac_write_packet(), flac_write_trailer(), flush_packet(), flv_data_packet(), flv_get_extradata(), flv_read_header(), flv_read_metabody(), flv_read_packet(), flv_read_seek(), flv_set_video_codec(), flv_write_header(), flv_write_packet(), flv_write_trailer(), format_child_next(), fourxm_read_header(), fourxm_read_packet(), framecrc_write_packet(), free_playlist_list(), frm_read_header(), frm_read_packet(), g723_1_read_packet(), g729_read_packet(), get_aiff_header(), get_dts(), get_meta(), get_metadata(), get_packet_header(), get_tag(), gif_read_ext(), gif_read_header(), gif_read_packet(), gif_write_header(), gif_write_trailer(), gsm_read_packet(), guess_ni_flag(), gxf_header(), gxf_packet(), gxf_read_index(), gxf_read_timestamp(), gxf_resync_media(), gxf_seek(), gxf_write_flt_packet(), gxf_write_header(), gxf_write_map_packet(), gxf_write_material_data_section(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_track_description(), gxf_write_track_description_section(), gxf_write_trailer(), gxf_write_umf_material_description(), gxf_write_umf_media_description(), gxf_write_umf_packet(), gxf_write_umf_payload(), gxf_write_umf_track_description(), handle_packet(), handle_packets(), hds_flush(), hds_free(), hds_write_header(), hls_read_header(), hls_start(), hls_write_packet(), hls_write_trailer(), hnm_read_header(), hnm_read_packet(), http_prepare_data(), http_receive_data(), ico_write_header(), ico_write_packet(), ico_write_trailer(), idcin_read_header(), idcin_read_packet(), idcin_read_seek(), iff_read_header(), iff_read_packet(), ilbc_read_header(), ilbc_read_packet(), ilbc_write_header(), ilbc_write_packet(), img_read_packet(), ingenient_read_packet(), init_input(), ipmovie_read_header(), ipmovie_read_packet(), ircam_read_header(), ircam_write_header(), is_realtime(), ism_flush(), ism_free(), ism_write_header(), iss_read_header(), iss_read_packet(), ivf_write_header(), ivf_write_packet(), jacosub_read_header(), jacosub_write_header(), latm_write_packet(), lmlm4_read_packet(), lvf_read_header(), lvf_read_packet(), lxf_read_header(), lxf_read_packet(), main(), matroska_execute_seekhead(), matroska_parse_cluster(), matroska_parse_cluster_incremental(), matroska_parse_seekhead_entry(), matroska_read_header(), matroska_read_packet(), matroska_read_seek(), matroska_resync(), md5_finish(), microdvd_read_header(), microdvd_write_header(), microdvd_write_packet(), mkv_flush_dynbuf(), mkv_write_attachments(), mkv_write_chapters(), mkv_write_flush_packet(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tag(), mkv_write_tags(), mkv_write_tracks(), mkv_write_trailer(), mmf_read_header(), mmf_read_packet(), modplug_read_header(), mov_find_next_sample(), mov_flush_fragment(), mov_read_header(), mov_read_packet(), mov_read_timecode_track(), mov_read_trak(), mov_write_header(), mov_write_trailer(), mp3_parse_vbr_tags(), mp3_queue_flush(), mp3_read_header(), mp3_read_packet(), mp3_seek(), mp3_update_xing(), mp3_write_trailer(), mp3_write_xing(), mpc8_handle_chunk(), mpc8_parse_seektable(), mpc8_read_header(), mpc8_read_packet(), mpc8_read_seek(), mpc_read_header(), mpc_read_packet(), mpegps_read_dts(), mpegps_read_header(), mpegps_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), mpegts_get_pcr(), mpegts_insert_null_packet(), mpegts_insert_pcr_only(), mpegts_prefix_m2ts_header(), mpegts_raw_read_packet(), mpegts_read_header(), mpegts_resync(), mpegts_write_flush(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), mpjpeg_write_header(), mpjpeg_write_packet(), mpl2_read_header(), mpsub_read_header(), msnwc_tcp_read_header(), msnwc_tcp_read_packet(), mtv_read_header(), mtv_read_packet(), mv_read_header(), mv_read_packet(), mv_read_seek(), mxf_decrypt_triplet(), mxf_parse_handle_essence(), mxf_read_header(), mxf_read_local_tags(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_random_index_pack(), mxf_read_seek(), mxf_seek_to_previous_partition(), mxf_write_cdci_common(), mxf_write_common_fields(), mxf_write_content_storage(), mxf_write_d10_audio_packet(), mxf_write_d10_video_packet(), mxf_write_essence_container_data(), mxf_write_essence_container_refs(), mxf_write_footer(), mxf_write_generic_desc(), mxf_write_generic_sound_common(), mxf_write_identification(), mxf_write_index_table_segment(), mxf_write_klv_fill(), mxf_write_mpegvideo_desc(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_packet(), mxf_write_partition(), mxf_write_preface(), mxf_write_primer_pack(), mxf_write_random_index_pack(), mxf_write_sequence(), mxf_write_structural_component(), mxf_write_system_item(), mxf_write_timecode_component(), mxf_write_track(), mxf_write_umid(), mxf_write_wav_common(), mxg_read_packet(), mxg_update_cache(), nc_read_packet(), need_output(), nist_read_header(), nsv_parse_NSVf_header(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_seek(), nsv_resync(), nut_read_header(), nut_read_packet(), nut_read_timestamp(), nut_write_header(), nut_write_packet(), nut_write_trailer(), nuv_header(), nuv_packet(), nuv_read_dts(), nuv_resync(), ogg_get_length(), ogg_read_page(), ogg_read_timestamp(), ogg_replace_stream(), ogg_reset(), ogg_restore(), ogg_save(), ogg_write_page(), oma_read_header(), oma_read_packet(), oma_read_seek(), oma_write_header(), open_input_stream(), open_output_file(), open_slave(), parse_audio_var(), parse_global_var(), parse_video_var(), pjs_read_header(), pmp_header(), pmp_packet(), print_report(), process_audio_header_eacs(), process_audio_header_elements(), process_audio_header_sead(), process_ea_header(), process_video_header_cmv(), process_video_header_mdec(), process_video_header_vp6(), put_chunk(), put_id3v2_tags(), put_meta(), put_payload_parsing_info(), put_swf_end_tag(), put_swf_tag(), put_vcd_padding_sector(), pva_read_packet(), pva_read_timestamp(), pvf_read_header(), qcp_read_header(), qcp_read_packet(), r3d_read_header(), r3d_read_packet(), r3d_read_rdvo(), r3d_read_red1(), r3d_read_reda(), r3d_read_redv(), r3d_read_reos(), r3d_seek(), raw_read_packet(), rawvideo_read_packet(), rdt_parse_packet(), read_atom(), read_braindead_odml_indx(), read_chapter(), read_desc_chunk(), read_gab2_sub(), read_header(), read_header_gme(), read_info_chunk(), read_kuki_chunk(), read_packet(), read_pakt_chunk(), read_part_of_packet(), read_seek(), read_table(), read_thread(), read_xing_toc(), realtext_read_header(), reanalyze(), redspark_read_header(), redspark_read_packet(), rl2_read_header(), rl2_read_packet(), rm_read_dts(), rm_read_header(), rm_read_header_old(), rm_read_index(), rm_read_packet(), rm_write_audio(), rm_write_header(), rm_write_trailer(), rm_write_video(), roq_read_header(), roq_read_packet(), roq_write_header(), rpl_read_header(), rpl_read_packet(), rsd_read_header(), rsd_read_packet(), rso_read_header(), rso_write_header(), rso_write_packet(), rso_write_trailer(), rtp_new_av_stream(), rtp_write_header(), rtp_write_trailer(), rv10_write_header(), sami_read_header(), sap_read_header(), sap_write_close(), sbg_read_header(), sdr2_read_header(), sdr2_read_packet(), section_write_packet(), seek_frame_byte(), seek_frame_generic(), seg_write_header(), seg_write_trailer(), segment_end(), segment_start(), seq_read_header(), seq_read_packet(), shift_data(), show_format(), siff_read_header(), siff_read_packet(), smacker_read_header(), smacker_read_packet(), smjpeg_read_header(), smjpeg_read_packet(), smjpeg_write_header(), smjpeg_write_packet(), smjpeg_write_trailer(), smush_read_header(), smush_read_packet(), sol_read_header(), sol_read_packet(), sox_read_header(), sox_write_header(), sox_write_trailer(), spdif_write_packet(), srt_read_header(), srt_write_packet(), str_read_header(), str_read_packet(), subviewer1_read_header(), subviewer_read_header(), swf_read_header(), swf_read_packet(), swf_write_header(), swf_write_trailer(), swf_write_video(), sync(), tak_read_header(), tedcaptions_read_header(), tee_write_trailer(), thp_read_header(), thp_read_packet(), tmv_read_header(), tmv_read_packet(), tmv_read_seek(), tta_read_header(), tta_read_packet(), tta_read_seek(), txd_read_packet(), update_stream_timings(), var_read_metadata(), vc1t_read_header(), vc1t_read_packet(), vc1test_write_header(), vc1test_write_packet(), vc1test_write_trailer(), vid_read_header(), vid_read_packet(), vivo_get_packet_header(), vivo_read_header(), vivo_read_packet(), vmd_read_header(), vmd_read_packet(), voc_read_header(), voc_write_header(), voc_write_packet(), voc_write_trailer(), vplayer_read_header(), vqf_read_header(), vqf_read_packet(), vqf_read_seek(), wc3_read_header(), wc3_read_packet(), webvtt_read_header(), webvtt_write_header(), webvtt_write_packet(), write_chapter(), write_chunk_header(), write_chunk_header2(), write_fat_sector(), write_frame(), write_header(), write_index(), write_packet(), write_packet_header(), write_root_table(), write_stream_codec(), write_stream_codec_info(), write_stream_data(), write_sync(), write_table_entries_attrib(), write_table_entries_events(), write_table_entries_time(), write_table_redirector_legacy_attrib(), write_timestamp(), write_trailer(), wsaud_read_header(), wsaud_read_packet(), wsvqa_read_header(), wsvqa_read_packet(), wtvfile_open_sector(), wv_read_header(), wv_read_packet(), wv_read_seek(), wv_write_packet(), wv_write_trailer(), xa_read_header(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_new_packet(), xmv_fetch_video_packet(), xmv_process_packet_header(), xmv_read_header(), xwma_read_header(), xwma_read_packet(), yop_read_header(), yop_read_packet(), yop_read_seek(), yuv4_read_header(), and yuv4_read_packet().

int AVFormatContext::ctx_flags

Format-specific flags, see AVFMTCTX_xx.

Definition at line 1120 of file avformat.h.

Referenced by amf_parse_object(), avformat_find_stream_info(), avs_read_header(), cdxl_read_header(), create_stream(), ff_rtsp_open_transport_ctx(), flv_read_header(), handle_packet(), hls_read_header(), img_read_header(), mpegps_read_header(), mpegts_read_header(), read_header(), roq_read_header(), sap_fetch_packet(), sap_read_header(), spdif_read_header(), str_read_header(), swf_read_header(), vid_read_header(), and wsvqa_read_header().

unsigned int AVFormatContext::nb_streams

Number of elements in AVFormatContext.streams.

Set by avformat_new_stream(), must not be modified by any other code.

Examples:

muxing.c, and remuxing.c.

Definition at line 1127 of file avformat.h.

Referenced by add_input_streams(), add_stream(), aiff_write_header(), amf_parse_object(), asf_read_pts(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_packet(), asfrtp_parse_sdp_line(), ast_write_header(), audio_write_header(), av_dump_format(), av_find_best_stream(), av_find_default_stream_index(), av_write_trailer(), avformat_find_stream_info(), avformat_free_context(), avformat_match_stream_specifier(), avformat_new_stream(), avformat_queue_attached_pictures(), avformat_seek_file(), 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_trailer(), avisynth_next_stream(), build_feed_streams(), build_file_streams(), build_frame_code(), caca_write_header(), caf_write_header(), check_packet(), clean_index(), clear_index_entries(), close_connection(), close_input_file(), close_slaves(), concat_read_header(), configure_output_audio_filter(), copy_metadata(), create_stream(), decode_info_header(), do_video_out(), dv_init_mux(), dv_write_header(), enable_tracks(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), export_orphan_timecode(), extract_mpeg4_header(), fbdev_write_header(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_decklink_write_header(), ff_find_stream_index(), ff_framehash_write_header(), ff_free_stream(), ff_gen_syncpoint_search(), ff_interleave_packet_per_dts(), ff_metadata_conv_ctx(), ff_mov_read_esds(), ff_mov_read_stsd_entries(), ff_nut_reset_ts(), ff_program_add_stream_index(), ff_rdt_parse_open(), ff_read_frame_flush(), ff_read_packet(), ff_rfps_calculate(), ff_rtsp_setup_output_streams(), ff_spdif_read_packet(), ff_store_parser_state(), ff_update_cur_dts(), ffm_close(), ffm_read_packet(), ffm_write_header(), fill_all_stream_timings(), film_read_header(), finalize_packet(), find_and_decode_index(), find_stream(), flac_write_header(), flv_data_packet(), flv_read_metabody(), flv_read_packet(), flv_write_header(), flv_write_trailer(), force_one_stream(), get_packet_header(), get_sindex(), get_subtitle_pkt(), get_system_header_size(), gif_write_header(), guess_ni_flag(), gxf_header(), gxf_write_header(), gxf_write_track_description_section(), gxf_write_umf_media_description(), gxf_write_umf_payload(), gxf_write_umf_track_description(), handle_file(), handle_packet(), has_duration(), hds_free(), hds_write_header(), hls_mux_init(), hls_read_header(), hls_write_header(), http_prepare_data(), http_receive_data(), ico_write_header(), ilbc_write_header(), init_input_filter(), init_muxer(), init_pts(), ircam_write_header(), ism_flush(), ism_free(), ism_write_header(), ivf_write_header(), lavfi_read_header(), lavfi_read_packet(), libquvi_read_header(), log_slave(), lxf_read_packet(), main(), microdvd_write_header(), mkv_write_attachments(), mkv_write_header(), mkv_write_tags(), mkv_write_tracks(), mkv_write_trailer(), mov_find_next_sample(), mov_read_ares(), mov_read_chan(), mov_read_chapters(), mov_read_close(), mov_read_ctts(), mov_read_custom_metadata(), mov_read_dac3(), mov_read_dec3(), mov_read_dref(), mov_read_dvc1(), mov_read_elst(), mov_read_enda(), mov_read_extradata(), mov_read_fiel(), mov_read_glbl(), mov_read_hdlr(), mov_read_header(), mov_read_mdhd(), mov_read_pasp(), mov_read_sbgp(), mov_read_seek(), mov_read_stco(), mov_read_stps(), mov_read_strf(), mov_read_stsc(), mov_read_stss(), mov_read_stsz(), mov_read_stts(), mov_read_targa_y216(), mov_read_tkhd(), mov_read_tmcd(), 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_single_packet(), mov_write_udta_tag(), movie_common_init(), mpc8_parse_seektable(), mpeg_mux_end(), mpeg_mux_init(), mpegps_read_packet(), mpegps_read_pes_header(), mpegts_write_end(), mpegts_write_flush(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pmt(), mv_read_packet(), mv_read_seek(), mxf_compute_index_tables(), mxf_free(), mxf_get_stream_index(), mxf_handle_small_eubc(), mxf_interleave_get_packet(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_read_close(), mxf_read_seek(), mxf_write_header(), mxf_write_index_table_segment(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_partition(), need_output(), new_output_stream(), nsv_parse_NSVs_header(), nsv_read_chunk(), nsv_read_close(), nsv_read_header(), nut_read_header(), nut_write_header(), nut_write_packet(), nut_write_trailer(), ogg_write_header(), ogg_write_trailer(), open_input_file(), open_output_file(), open_slave(), opengl_write_header(), output_packet(), pmt_cb(), prepare_sdp_description(), probe_file(), process_input(), pulse_write_header(), put_system_header(), qt_rtp_parse_packet(), r3d_read_packet(), rdt_parse_sdp_line(), read_braindead_odml_indx(), read_data(), read_ffserver_streams(), read_frame_internal(), read_header(), read_interval_packets(), read_seek(), read_thread(), real_seek(), recheck_discard_flags(), remove_decoded_packets(), rl2_read_packet(), rl2_read_seek(), rm_read_close(), rm_read_index(), rm_write_header(), rm_write_trailer(), roq_write_header(), rpl_read_packet(), rtp_new_av_stream(), rtp_write_header(), rtsp_read_header(), rtsp_read_packet(), rv10_write_header(), sap_fetch_packet(), sap_read_header(), sap_write_close(), sap_write_header(), sdl_write_header(), search_hi_lo_keyframes(), segment_mux_init(), select_reference_stream(), set_disposition_bits(), setup_find_stream_info_opts(), show_format(), show_streams(), smjpeg_write_header(), srt_write_header(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), swf_read_packet(), swf_write_header(), swf_write_trailer(), sync(), tee_write_header(), tmcd_is_referenced(), transcode_init(), try_seek(), update_stream_timings(), update_wrap_reference(), voc_write_header(), write_header(), write_headers(), write_index(), write_mainheader(), write_manifest(), write_trailer(), wv_write_header(), xmv_process_packet_header(), and xv_write_header().

AVStream** AVFormatContext::streams

A list of all streams in the file.

New streams are created with avformat_new_stream().

• demuxing: streams are created by libavformat in avformat_open_input(). If AVFMTCTX_NOHEADER is set in ctx_flags, then new streams may also appear in av_read_frame().
• muxing: streams are created by the user before avformat_write_header().

Freed by libavformat in avformat_free_context().

Examples:

demuxing_decoding.c, filtering_audio.c, filtering_video.c, muxing.c, and remuxing.c.

Definition at line 1139 of file avformat.h.

Referenced by a64_write_header(), add_input_streams(), adts_write_header(), adx_read_header(), adx_read_packet(), aea_read_packet(), aiff_read_packet(), aiff_write_header(), aiff_write_packet(), aiff_write_trailer(), amr_parse_sdp_line(), amr_read_packet(), ape_read_seek(), asf_build_simple_index(), asf_parse_packet(), asf_read_frame_header(), asf_read_header(), asf_read_pts(), asf_read_seek(), asf_write_header1(), asf_write_packet(), asfrtp_parse_packet(), asfrtp_parse_sdp_line(), ast_read_packet(), ast_write_header(), ast_write_packet(), ast_write_trailer(), audio_write_frame(), audio_write_header(), av_find_best_stream(), av_find_default_stream_index(), av_interleaved_write_frame(), av_read_frame(), av_write_frame(), av_write_trailer(), avformat_find_stream_info(), avformat_free_context(), avformat_match_stream_specifier(), avformat_new_stream(), avformat_queue_attached_pictures(), avformat_seek_file(), 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(), avisynth_next_stream(), avisynth_read_seek(), build_feed_streams(), build_file_streams(), build_frame_code(), caca_write_header(), caf_write_header(), caf_write_packet(), caf_write_trailer(), celt_header(), check_packet(), clean_index(), clear_index_entries(), close_connection(), close_input_file(), compute_overlay_rect(), concat_read_header(), concat_read_packet(), configure_output_audio_filter(), copy_metadata(), create_stream(), daud_write_header(), decode_frame(), decode_info_header(), decode_stream_header(), dirac_header(), dump_stream_format(), dv_init_mux(), dv_write_header(), dv_write_packet(), enable_tracks(), estimate_timings(), estimate_timings_from_bit_rate(), estimate_timings_from_pts(), event_thread(), export_orphan_timecode(), extract_mpeg4_header(), fbdev_write_header(), fbdev_write_packet(), ff_alsa_open(), ff_audio_interleave_close(), ff_audio_interleave_init(), ff_audio_rechunk_interleave(), ff_decklink_write_header(), ff_decklink_write_packet(), ff_find_stream_index(), ff_framehash_write_header(), ff_free_stream(), ff_gen_syncpoint_search(), ff_id3v2_write_apic(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_load_image(), ff_metadata_conv_ctx(), ff_mov_init_hinting(), ff_mov_read_esds(), ff_mov_read_stsd_entries(), ff_mov_write_packet(), ff_pcm_read_packet(), ff_pcm_read_seek(), ff_rdt_parse_open(), ff_read_frame_flush(), ff_read_packet(), ff_read_timestamp(), ff_real_parse_sdp_a_line(), ff_reduce_index(), ff_restore_parser_state(), ff_rfps_calculate(), ff_rtp_chain_mux_open(), ff_rtp_send_aac(), ff_rtp_send_jpeg(), ff_rtp_send_latm(), ff_rtsp_open_transport_ctx(), ff_sauce_read(), ff_seek_frame_binary(), ff_spdif_read_packet(), ff_store_parser_state(), ff_update_cur_dts(), ff_write_chained(), ffm_close(), ffm_write_header(), fill_all_stream_timings(), film_read_header(), filter_packet(), find_and_decode_index(), find_stream(), flac_header(), flac_write_header(), flac_write_trailer(), flush_packet(), flv_data_packet(), flv_read_metabody(), flv_read_packet(), flv_write_header(), flv_write_packet(), flv_write_trailer(), frm_read_packet(), g729_read_packet(), get_aiff_header(), get_packet_header(), get_private_data(), get_subtitle_pkt(), get_system_header_size(), gif_write_header(), guess_ni_flag(), gxf_compare_field_nb(), gxf_header(), gxf_interleave_packet(), gxf_packet(), gxf_read_index(), gxf_seek(), gxf_write_header(), gxf_write_media_preamble(), gxf_write_packet(), gxf_write_track_description(), gxf_write_track_description_section(), gxf_write_umf_media_description(), gxf_write_umf_track_description(), h263_init(), h264_init(), handle_file(), has_duration(), hds_flush(), 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(), http_receive_data(), ico_write_header(), ico_write_packet(), ico_write_trailer(), idcin_read_seek(), iff_read_packet(), ilbc_parse_sdp_line(), ilbc_read_packet(), ilbc_write_header(), img_read_packet(), img_read_seek(), init_convert_timestamp(), init_filters(), init_input_filter(), init_muxer(), init_pts(), init_video(), interleave_compare_dts(), interleave_new_audio_packet(), ircam_write_header(), ism_write_header(), ism_write_packet(), iss_read_packet(), ivf_write_header(), jacosub_write_header(), latm_parse_sdp_line(), latm_write_frame_header(), latm_write_header(), latm_write_packet(), lavfi_read_header(), libquvi_read_header(), log_packet(), log_slave(), main(), matroska_read_header(), matroska_read_seek(), microdvd_write_header(), mkv_write_attachments(), mkv_write_block(), mkv_write_header(), mkv_write_packet(), mkv_write_packet_internal(), mkv_write_tags(), mkv_write_tracks(), mov_create_timecode_track(), mov_find_next_sample(), mov_read_ares(), mov_read_chan(), mov_read_chapters(), mov_read_close(), mov_read_ctts(), mov_read_custom_metadata(), mov_read_dac3(), mov_read_dec3(), mov_read_dref(), mov_read_dvc1(), mov_read_elst(), mov_read_enda(), mov_read_extradata(), mov_read_fiel(), mov_read_glbl(), mov_read_hdlr(), mov_read_header(), mov_read_mdhd(), mov_read_pasp(), mov_read_sbgp(), mov_read_seek(), mov_read_stco(), mov_read_stps(), mov_read_strf(), mov_read_stsc(), mov_read_stss(), mov_read_stsz(), mov_read_stts(), mov_read_targa_y216(), mov_read_tkhd(), mov_read_tmcd(), mov_read_trun(), mov_read_wave(), mov_read_wfex(), mov_write_ftyp_tag(), mov_write_header(), mov_write_moov_tag(), mov_write_single_packet(), mov_write_udta_sdp(), mov_write_uuidprof_tag(), movie_common_init(), mp3_seek(), mp3_write_xing(), mpc8_parse_seektable(), mpc8_read_seek(), mpc_read_packet(), mpc_read_seek(), mpeg_init(), mpeg_mux_end(), mpeg_mux_init(), mpeg_mux_write_packet(), mpegps_read_dts(), mpegps_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), mpegts_get_pcr(), mpegts_write_end(), mpegts_write_flush(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pmt(), mv_read_packet(), mv_read_seek(), mxf_compare_timestamps(), mxf_compute_index_tables(), mxf_compute_sample_count(), mxf_free(), mxf_get_stream_index(), mxf_handle_small_eubc(), mxf_interleave_get_packet(), mxf_parse_dnxhd_frame(), mxf_parse_dv_frame(), mxf_read_close(), mxf_read_packet(), mxf_read_packet_old(), mxf_read_seek(), mxf_set_audio_pts(), mxf_write_essence_container_refs(), mxf_write_header(), mxf_write_identification(), mxf_write_index_table_segment(), mxf_write_multi_descriptor(), mxf_write_package(), mxf_write_packet(), mxf_write_system_item(), nsv_read_chunk(), nsv_read_close(), nsv_read_seek(), nut_read_header(), nut_write_header(), nut_write_packet(), nuv_read_dts(), ogg_buffer_data(), ogg_compare_granule(), ogg_get_length(), ogg_read_header(), ogg_read_seek(), ogg_validate_keyframe(), ogg_write_header(), ogg_write_packet(), ogg_write_page(), ogg_write_pages(), ogg_write_trailer(), ogm_dshow_header(), ogm_header(), old_dirac_header(), old_flac_header(), oma_read_packet(), oma_write_header(), open_codec_context(), open_input_file(), open_output_file(), open_slave(), opengl_compute_display_area(), opengl_draw(), opengl_write_header(), opt_map(), opt_map_channel(), opt_target(), opus_header(), opus_packet(), output_packet(), parse_chunks(), parse_h264_sdp_line(), parse_packet(), parse_sdp_line(), pmp_packet(), pmt_cb(), prepare_sdp_description(), probe_file(), process_frame(), process_input(), pulse_write_header(), pulse_write_packet(), put_system_header(), r3d_read_packet(), r3d_read_rdvo(), r3d_read_reda(), r3d_read_redv(), r3d_seek(), rawvideo_read_packet(), rdt_parse_sdp_line(), read_braindead_odml_indx(), read_data(), read_ffserver_streams(), read_frame(), read_frame_internal(), read_gab2_sub(), read_header(), read_interval_packets(), read_kuki_chunk(), read_packet(), read_pakt_chunk(), read_part_of_packet(), read_seek(), read_thread(), read_xing_toc(), real_seek(), recheck_discard_flags(), redspark_read_packet(), remove_decoded_packets(), report_new_stream(), rl2_read_header(), rl2_read_packet(), rl2_read_seek(), rm_read_close(), rm_read_dts(), rm_read_index(), rm_read_packet(), rm_write_header(), rm_write_packet(), roq_write_header(), rpl_read_packet(), rsd_read_packet(), rso_write_header(), rtp_new_av_stream(), rtp_send_ilbc(), rtp_write_header(), rtp_write_packet(), rtsp_read_packet(), rtsp_read_play(), rtsp_read_seek(), sap_fetch_packet(), sap_read_header(), sap_write_close(), sap_write_header(), sap_write_packet(), sbg_read_packet(), sbg_read_seek2(), sdl_write_header(), sdl_write_packet(), search_hi_lo_keyframes(), seek_frame_generic(), seek_frame_internal(), seg_write_header(), seg_write_packet(), segment_mux_init(), select_reference_stream(), set_disposition_bits(), setup_find_stream_info_opts(), show_packet(), show_stream(), skeleton_header(), smjpeg_write_header(), smjpeg_write_packet(), sox_write_header(), sox_write_trailer(), spdif_write_header(), speex_header(), srt_write_header(), srt_write_packet(), stream_component_close(), stream_component_open(), stream_cycle_channel(), sub2video_prepare(), swf_read_packet(), swf_write_header(), swf_write_packet(), swf_write_trailer(), sync(), tee_write_packet(), theora_header(), theora_packet(), tmcd_is_referenced(), transcode_init(), try_seek(), tta_read_packet(), tta_read_seek(), update_initial_timestamps(), update_stream_timings(), update_wrap_reference(), v4l2_read_packet(), v4l2_set_parameters(), vc1t_read_packet(), vc1test_write_header(), voc_read_packet(), voc_write_header(), voc_write_packet(), vorbis_header(), vorbis_packet(), vorbis_update_metadata(), vp8_header(), vp8_packet(), vqf_read_seek(), webvtt_write_header(), write_abst(), write_frame(), write_header(), write_headers(), write_manifest(), write_packet(), write_sm_data(), write_streaminfo(), write_table_entries_attrib(), write_table_redirector_legacy_attrib(), write_timestamp(), write_trailer(), wsaud_read_packet(), wv_read_packet(), wv_read_seek(), wv_write_header(), xa_read_packet(), xiph_parse_sdp_line(), xiph_vorbis_init(), xmv_process_packet_header(), xv_write_header(), xv_write_packet(), xwma_read_packet(), and yuv4_read_packet().

char AVFormatContext::filename[1024]

input or output filename

• demuxing: set by avformat_open_input()
• muxing: may be set by the caller before avformat_write_header()

Definition at line 1147 of file avformat.h.

Referenced by add_file(), append_entry(), audio_read_header(), audio_write_header(), avformat_alloc_output_context2(), avformat_open_input(), avisynth_open_file(), caca_write_header(), choose_encoder(), device_open(), dv1394_read_header(), extract_mpeg4_header(), fbdev_read_header(), fbdev_write_header(), ff_alsa_open(), ff_decklink_write_header(), ff_rtsp_setup_output_streams(), filter_packet(), grab_read_header(), gxf_write_material_data_section(), hds_flush(), hds_write_header(), hds_write_trailer(), hls_read_header(), hls_start(), hls_window(), hls_write_header(), iec61883_read_header(), img_read_header(), ipod_get_codec_tag(), is_realtime(), ism_write_header(), ism_write_trailer(), lavfi_read_header(), libquvi_read_header(), log_slave(), mov_read_trak(), mpegts_write_header(), nsv_read_header(), open_output_file(), opengl_write_header(), parse_device_name(), prepare_sdp_description(), process_input(), pulse_read_header(), pulse_write_header(), read_header(), read_thread(), resetup_tcp(), rtp_new_av_stream(), rtsp_listen(), sap_read_header(), sap_write_header(), sdl_write_header(), seg_write_header(), seg_write_packet(), segment_end(), segment_start(), set_segment_filename(), shift_data(), show_format(), start_jack(), tee_write_header(), transcode_init(), vfw_read_header(), write_abst(), write_header(), write_manifest(), write_packet(), x11grab_read_header(), and xv_write_header().

int64_t AVFormatContext::start_time

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 1156 of file avformat.h.

Referenced by av_dump_format(), avformat_open_input(), compute_chapters_end(), concat_read_packet(), do_streamcopy(), dxa_read_header(), estimate_timings(), event_loop(), fill_all_stream_timings(), flv_read_header(), movie_common_init(), open_input_file(), process_input(), read_header(), read_packets(), read_thread(), rewind_file(), show_format(), try_seek(), and update_stream_timings().

int64_t AVFormatContext::duration

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 1166 of file avformat.h.

Referenced by amf_parse_object(), av_dump_format(), avformat_open_input(), avi_read_header(), compute_chapters_end(), concat_read_header(), dxa_read_header(), estimate_timings(), estimate_timings_from_bit_rate(), event_loop(), fill_all_stream_timings(), find_and_decode_index(), flv_read_packet(), flv_write_header(), has_duration(), hls_read_header(), hls_read_seek(), matroska_read_header(), mov_read_mvhd(), mov_read_trex(), ogg_get_length(), open_next_file(), open_output_file(), read_header(), rm_read_header(), show_format(), update_stream_timings(), vivo_read_header(), and wv_read_seek().

int AVFormatContext::bit_rate

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 1173 of file avformat.h.

Referenced by av_dump_format(), dv_read_header(), estimate_timings(), estimate_timings_from_bit_rate(), event_loop(), ff_spdif_read_packet(), g729_read_header(), mpegts_read_header(), mxf_read_seek(), show_format(), and update_stream_timings().

unsigned int AVFormatContext::packet_size

Definition at line 1175 of file avformat.h.

Referenced by asf_build_simple_index(), asf_get_packet(), asf_parse_packet(), asf_read_file_properties(), asf_read_pts(), asf_read_seek(), asf_write_header(), asf_write_header1(), flush_packet(), mpeg_mux_init(), qcp_read_header(), qcp_read_packet(), and rtp_write_header().

int AVFormatContext::max_delay

Definition at line 1176 of file avformat.h.

Referenced by ff_rtp_chain_mux_open(), ff_rtsp_open_transport_ctx(), http_prepare_data(), mpeg_mux_init(), mpegts_write_header(), mpegts_write_packet_internal(), mpegts_write_pes(), open_output_file(), output_packet(), rtp_write_header(), and sap_read_header().

int AVFormatContext::flags

Definition at line 1178 of file avformat.h.

Referenced by av_read_frame(), avformat_close_input(), avformat_find_stream_info(), avformat_open_input(), avi_read_header(), compute_pkt_fields(), device_open(), dshow_read_packet(), extract_mpeg4_header(), fbdev_read_header(), fbdev_read_packet(), ff_alsa_open(), ff_read_packet(), ff_rtp_chain_mux_open(), gxf_read_index(), hls_read_header(), init_input(), matroska_execute_seekhead(), mov_read_default(), mov_write_header(), open_input_file(), open_input_stream(), parse_keyframes_index(), read_frame_internal(), read_thread(), rm_read_header(), vfw_read_packet(), write_header(), and write_packet().

unsigned int AVFormatContext::probesize

Maximum size of the data read from input for determining the input container format.

Demuxing only, set by the caller before avformat_open_input().

Definition at line 1199 of file avformat.h.

Referenced by avformat_find_stream_info(), init_input(), lavfi_read_header(), and mpegts_read_header().

int AVFormatContext::max_analyze_duration

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().

Definition at line 1206 of file avformat.h.

Referenced by avformat_find_stream_info().

const uint8_t* AVFormatContext::key

Definition at line 1208 of file avformat.h.

Referenced by asf_parse_packet(), decrypt_init(), and mxf_decrypt_triplet().

int AVFormatContext::keylen

Definition at line 1209 of file avformat.h.

Referenced by asf_parse_packet(), asf_read_header(), decrypt_init(), and mxf_decrypt_triplet().

unsigned int AVFormatContext::nb_programs

Definition at line 1211 of file avformat.h.

Referenced by av_dump_format(), av_find_program_from_stream(), av_new_program(), avformat_free_context(), avformat_match_stream_specifier(), clear_avprogram(), discard_pid(), ff_metadata_conv_ctx(), ff_program_add_stream_index(), pat_cb(), set_pcr_pid(), show_format(), show_programs(), and update_stream_timings().

AVProgram** AVFormatContext::programs

Definition at line 1212 of file avformat.h.

Referenced by av_dump_format(), av_find_program_from_stream(), av_new_program(), avformat_free_context(), avformat_match_stream_specifier(), clear_avprogram(), discard_pid(), ff_metadata_conv_ctx(), ff_program_add_stream_index(), pat_cb(), set_pcr_pid(), show_programs(), and update_stream_timings().

enum AVCodecID AVFormatContext::video_codec_id

Forced video codec_id.

Demuxing: Set by user.

Definition at line 1218 of file avformat.h.

Referenced by device_try_init(), dshow_read_header(), flv_read_packet(), force_codec_ids(), img_read_header(), mmap_read_frame(), mov_skip_multiple_stsd(), open_input_file(), and v4l2_read_header().

enum AVCodecID AVFormatContext::audio_codec_id

Forced audio codec_id.

Demuxing: Set by user.

Definition at line 1224 of file avformat.h.

Referenced by audio_read_header(), ff_voc_get_packet(), flv_read_packet(), force_codec_ids(), img_read_header(), open_input_file(), and pulse_read_header().

enum AVCodecID AVFormatContext::subtitle_codec_id

Forced subtitle codec_id.

Demuxing: Set by user.

Definition at line 1230 of file avformat.h.

Referenced by force_codec_ids(), and open_input_file().

unsigned int AVFormatContext::max_index_size

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.

• muxing: unused
• demuxing: set by user

Definition at line 1242 of file avformat.h.

Referenced by ff_reduce_index().

unsigned int AVFormatContext::max_picture_buffer

Maximum amount of memory in bytes to use for buffering frames obtained from realtime capture devices.

Definition at line 1248 of file avformat.h.

Referenced by shall_we_drop().

unsigned int AVFormatContext::nb_chapters

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.

• muxing: set by user
• demuxing: set by libavformat

Definition at line 1261 of file avformat.h.

Referenced by asf_write_header1(), asf_write_markers(), av_dump_format(), avformat_free_context(), avpriv_new_chapter(), compute_chapters_end(), copy_chapters(), event_loop(), ff_id3v2_write_metadata(), ff_metadata_conv_ctx(), mkv_write_chapters(), mkv_write_header(), mkv_write_tags(), mov_create_chapter_track(), mov_write_chpl_tag(), mov_write_header(), mov_write_trailer(), mov_write_udta_tag(), nut_write_header(), ogm_chapter(), open_output_file(), parse_forced_key_frames(), read_chapter(), read_header(), seek_chapter(), show_chapters(), write_headers(), and write_trailer().

AVChapter** AVFormatContext::chapters

Definition at line 1262 of file avformat.h.

Referenced by asf_write_markers(), av_dump_format(), avformat_free_context(), avpriv_new_chapter(), compute_chapters_end(), copy_chapters(), ff_metadata_conv_ctx(), mkv_write_chapters(), mkv_write_header(), mkv_write_tags(), mov_create_chapter_track(), mov_write_chpl_tag(), nut_write_header(), ogm_chapter(), open_output_file(), parse_forced_key_frames(), read_chapter(), read_header(), seek_chapter(), show_chapters(), write_chapter(), and write_trailer().

AVDictionary* AVFormatContext::metadata

Metadata that applies to the whole file.

• demuxing: set by libavformat in avformat_open_input()
• muxing: may be set by the caller before avformat_write_header()

Freed by libavformat in avformat_free_context().

Examples:

metadata.c.

Definition at line 1272 of file avformat.h.

Referenced by add_meta(), add_metadata(), adts_aac_read_header(), amf_parse_object(), ape_tag_read_field(), asf_read_header(), asf_write_header1(), av_dump_format(), avformat_free_context(), avi_read_header(), avi_read_nikon(), avi_read_tag(), caf_write_header(), close_connection(), decode_info_header(), dtshd_read_header(), dv_init_mux(), dv_read_timecode(), dv_write_header(), export_orphan_timecode(), ff_ape_write_tag(), ff_id3v2_read(), ff_id3v2_write_metadata(), ff_metadata_conv_ctx(), ff_read_riff_info(), ff_riff_write_info(), ff_rm_read_mdpr_codecdata(), ff_sauce_read(), ff_wms_parse_sdp_a_line(), ffm_write_header(), flac_read_header(), flac_write_header(), flv_read_packet(), flv_write_header(), get_meta(), get_metadata(), get_string(), get_tag(), gxf_header(), gxf_write_header(), gxf_write_umf_material_description(), hls_mux_init(), http_prepare_data(), id3v1_create_tag(), id3v1_set_string(), init_muxer(), libquvi_read_header(), main(), matroska_convert_tags(), matroska_read_header(), mkv_write_header(), mkv_write_tags(), mkv_write_tracks(), modplug_load_metadata(), mov_metadata_gnre(), mov_metadata_int8_bypass_padding(), mov_metadata_int8_no_padding(), mov_metadata_raw(), mov_metadata_track_or_disc_number(), mov_parse_stsd_audio(), mov_read_ftyp(), mov_read_mvhd(), mov_read_udta_string(), mov_write_3gp_udta_tag(), mov_write_header(), mov_write_int8_metadata(), mov_write_string_metadata(), mov_write_tmpo_tag(), mov_write_trkn_tag(), mov_write_uuidusmt_tag(), mp3_read_header(), mpc_read_header(), mpegts_write_header(), mxf_parse_structural_metadata(), mxf_write_header(), nist_read_header(), nsv_parse_NSVf_header(), ogg_write_header(), open_output_file(), open_slave(), parse_legacy_attrib(), parse_tag(), prepare_sdp_description(), put_id3v2_tags(), put_meta(), read_header(), read_info_chunk(), read_thread(), riff_has_valid_tags(), rm_read_metadata(), rpl_read_header(), rv10_write_header(), sap_write_header(), segment_mux_init(), show_format(), smjpeg_read_header(), smjpeg_write_header(), sox_read_header(), sox_write_header(), subviewer_read_header(), var_read_metadata(), vivo_read_header(), vqf_read_header(), wc3_read_header(), write_globalinfo(), write_table_entries_attrib(), write_table_redirector_legacy_attrib(), write_trailer(), and wv_read_header().

int64_t AVFormatContext::start_time_realtime

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. Muxing only, set by the caller before avformat_write_header().

Definition at line 1280 of file avformat.h.

Referenced by ff_rtp_chain_mux_open(), ff_rtsp_setup_output_streams(), rtp_write_header(), and sap_write_header().

int AVFormatContext::fps_probe_size

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 1287 of file avformat.h.

Referenced by avformat_find_stream_info().

int AVFormatContext::error_recognition

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 1294 of file avformat.h.

Referenced by avi_read_header(), ebml_parse_id(), ff_flac_parse_picture(), ff_rm_read_mdpr_codecdata(), matroska_read_header(), ogg_read_header(), read_header(), and tak_read_header().

AVIOInterruptCB AVFormatContext::interrupt_callback

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 1305 of file avformat.h.

Referenced by avformat_find_stream_info(), copy_moof(), ff_rtp_chain_mux_open(), hds_write_header(), hls_mux_init(), hls_read_header(), hls_start(), hls_window(), img_read_packet(), init_file(), init_input(), ism_flush(), ism_seek(), ism_write_header(), mov_read_trak(), open_file(), open_input(), open_input_file(), open_output_file(), parse_fragment(), read_ffserver_streams(), read_thread(), rtsp_listen(), rtsp_read_setup(), sap_read_header(), sap_write_header(), seg_write_header(), segment_list_open(), segment_mux_init(), segment_start(), write_abst(), write_manifest(), and write_packet().

int AVFormatContext::debug

Flags to enable debugging.

Definition at line 1310 of file avformat.h.

Referenced by read_frame_internal().

int64_t AVFormatContext::max_interleave_delta

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 1329 of file avformat.h.

Referenced by ff_interleave_packet_per_dts().

int AVFormatContext::ts_id

Transport stream id.

This will be moved into demuxer private options. Thus no API/ABI compatibility

Definition at line 1335 of file avformat.h.

Referenced by pat_cb().

int AVFormatContext::audio_preload

Audio preload in microseconds.

Note, not all formats support this and unpredictable things may happen if it is used when not supported.

• encoding: Set by user via AVOptions (NO direct access)
• decoding: unused

Definition at line 1343 of file avformat.h.

Referenced by interleave_compare_dts().

int AVFormatContext::max_chunk_duration

Max chunk time in microseconds.

Note, not all formats support this and unpredictable things may happen if it is used when not supported.

• encoding: Set by user via AVOptions (NO direct access)
• decoding: unused

Definition at line 1351 of file avformat.h.

Referenced by ff_interleave_add_packet().

int AVFormatContext::max_chunk_size

Max chunk size in bytes Note, not all formats support this and unpredictable things may happen if it is used when not supported.

• encoding: Set by user via AVOptions (NO direct access)
• decoding: unused

Definition at line 1359 of file avformat.h.

Referenced by ff_interleave_add_packet().

int AVFormatContext::use_wallclock_as_timestamps

forces the use of wallclock timestamps as pts/dts of packets This has undefined results in the presence of B frames.

• encoding: unused
• decoding: Set by user via AVOptions (NO direct access)

Definition at line 1367 of file avformat.h.

Referenced by ff_read_packet().

int AVFormatContext::avoid_negative_ts

Avoid negative timestamps during muxing.

0 -> allow negative timestamps 1 -> avoid negative timestamps -1 -> choose automatically (default) Note, this only works when interleave_packet_per_dts is in use.

• encoding: Set by user via AVOptions (NO direct access)
• decoding: unused

Definition at line 1378 of file avformat.h.

Referenced by asf_write_header(), avformat_write_header(), mkv_write_header(), mov_write_header(), nut_write_header(), seg_write_header(), and write_packet().

int AVFormatContext::avio_flags

avio flags, used to force AVIO_FLAG_DIRECT.

• encoding: unused
• decoding: Set by user via AVOptions (NO direct access)

Definition at line 1385 of file avformat.h.

Referenced by init_input().

enum AVDurationEstimationMethod AVFormatContext::duration_estimation_method

The duration field can be estimated through various ways, and this field can be used to know how the duration was estimated.

• encoding: unused
• decoding: Read by user via AVOptions (NO direct access)

Definition at line 1393 of file avformat.h.

Referenced by av_fmt_ctx_get_duration_estimation_method(), estimate_timings(), find_and_decode_index(), and find_duration().

unsigned int AVFormatContext::skip_initial_bytes

Skip initial bytes when opening stream.

• encoding: unused
• decoding: Set by user via AVOptions (NO direct access)

Definition at line 1400 of file avformat.h.

Referenced by avformat_open_input().

unsigned int AVFormatContext::correct_ts_overflow

Correct single timestamp overflows.

• encoding: unused
• decoding: Set by user via AVOptions (NO direct access)

Definition at line 1407 of file avformat.h.

Referenced by update_wrap_reference().

int AVFormatContext::seek2any

Force seeking to any (also non key) frames.

• encoding: unused
• decoding: Set by user via AVOptions (NO direct access)

Definition at line 1414 of file avformat.h.

Referenced by avformat_seek_file().

int AVFormatContext::flush_packets

Flush the I/O context after each packet.

• encoding: Set by user via AVOptions (NO direct access)
• decoding: unused

Definition at line 1421 of file avformat.h.

Referenced by av_write_frame(), and write_packet().

int AVFormatContext::probe_score

format probing score.

The maximal score is AVPROBE_SCORE_MAX, its set when the demuxer probes the format.

• encoding: unused
• decoding: set by avformat, read by user via av_format_get_probe_score() (NO direct access)

Definition at line 1430 of file avformat.h.

Referenced by av_format_get_probe_score(), and avformat_open_input().

struct AVPacketList* AVFormatContext::packet_buffer

This buffer is only needed when packets were already buffered but not decoded, for example to get the codec parameters in MPEG streams.

Definition at line 1445 of file avformat.h.

Referenced by av_read_frame(), avformat_find_stream_info(), compute_pkt_fields(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), ff_restore_parser_state(), ff_store_parser_state(), flush_packet_queue(), mxf_interleave_get_packet(), update_initial_durations(), and update_initial_timestamps().

struct AVPacketList* AVFormatContext::packet_buffer_end

Definition at line 1446 of file avformat.h.

Referenced by av_read_frame(), avformat_find_stream_info(), ff_interleave_add_packet(), ff_interleave_packet_per_dts(), flush_packet_queue(), get_next_pkt(), and mxf_interleave_get_packet().

int64_t AVFormatContext::data_offset

offset of the first packet

Definition at line 1449 of file avformat.h.

Referenced by asf_build_simple_index(), asf_get_packet(), asf_read_pts(), asf_read_seek(), av_demuxer_open(), avformat_open_input(), dv_frame_offset(), ff_gen_search(), ff_pcm_read_seek(), mp3_seek(), mtv_read_packet(), nut_read_header(), ogg_get_length(), ogg_packet(), r3d_read_header(), read_header(), seek_frame_byte(), seek_frame_generic(), vqf_read_seek(), and yop_read_seek().

struct AVPacketList* AVFormatContext::raw_packet_buffer

Raw packets from the demuxer, prior to parsing and decoding.

This buffer is used for buffering packets until the codec can be identified, as parsing cannot be done without knowing the codec.

Definition at line 1457 of file avformat.h.

Referenced by avformat_queue_attached_pictures(), ff_read_packet(), ff_restore_parser_state(), ff_store_parser_state(), and flush_packet_queue().

struct AVPacketList* AVFormatContext::raw_packet_buffer_end

Definition at line 1458 of file avformat.h.

Referenced by avformat_queue_attached_pictures(), ff_read_packet(), and flush_packet_queue().

struct AVPacketList* AVFormatContext::parse_queue

Packets split by the parser get queued here.

Definition at line 1462 of file avformat.h.

Referenced by compute_pkt_fields(), ff_restore_parser_state(), ff_store_parser_state(), flush_packet_queue(), get_next_pkt(), parse_packet(), read_frame_internal(), update_initial_durations(), and update_initial_timestamps().

struct AVPacketList* AVFormatContext::parse_queue_end

Definition at line 1463 of file avformat.h.

Referenced by flush_packet_queue(), parse_packet(), and read_frame_internal().

int AVFormatContext::raw_packet_buffer_remaining_size

Definition at line 1468 of file avformat.h.

Referenced by avformat_open_input(), ff_read_packet(), ff_restore_parser_state(), ff_store_parser_state(), flush_packet_queue(), and probe_codec().

int64_t AVFormatContext::offset

Offset to remap timestamps to be non-negative.

Expressed in timebase units.

See Also

AVStream.mux_ts_offset

Definition at line 1475 of file avformat.h.

Referenced by write_packet().

AVRational AVFormatContext::offset_timebase

Timebase for the timestamp offset.

Definition at line 1480 of file avformat.h.

Referenced by write_packet().

AVFormatInternal* AVFormatContext::internal

An opaque field for libavformat internal usage.

Must not be accessed in any way by callers.

Definition at line 1486 of file avformat.h.

Referenced by avformat_alloc_context(), avformat_free_context(), ff_interleave_packet_per_dts(), and init_muxer().

int AVFormatContext::io_repositioned

IO repositioned flag.

This is set by avformat when the underlaying 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 1494 of file avformat.h.

Referenced by ogg_read_packet(), and seek_frame_byte().

AVCodec* AVFormatContext::video_codec

Forced video codec.

This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user via av_format_set_video_codec (NO direct access).

Definition at line 1502 of file avformat.h.

AVCodec* AVFormatContext::audio_codec

Forced audio codec.

This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user via av_format_set_audio_codec (NO direct access).

Definition at line 1510 of file avformat.h.

AVCodec* AVFormatContext::subtitle_codec

Forced subtitle codec.

This allows forcing a specific decoder, even when there are multiple with the same codec_id. Demuxing: Set by user via av_format_set_subtitle_codec (NO direct access).

Definition at line 1518 of file avformat.h.

int AVFormatContext::metadata_header_padding

Number of bytes to be written as padding in a metadata header.

Demuxing: Unused. Muxing: Set by user via av_format_set_metadata_header_padding.

Definition at line 1525 of file avformat.h.

Referenced by ff_id3v2_write_simple(), flac_write_header(), mp3_queue_flush(), and put_id3v2_tags().

void* AVFormatContext::opaque

User data.

This is a place for some private data of the user. Mostly usable with control_message_cb or any future callbacks in device's context.

Definition at line 1532 of file avformat.h.

av_format_control_message AVFormatContext::control_message_cb

Callback used by devices to communicate with application.

Definition at line 1537 of file avformat.h.

Referenced by avdevice_dev_to_app_control_message().

int64_t AVFormatContext::output_ts_offset

Output timestamp offset, in microseconds.

Muxing: set by user via AVOptions (NO direct access)

Definition at line 1543 of file avformat.h.

Referenced by write_packet().

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

• libavformat/avformat.h