Main libavformat public API header. More...

#include <time.h>
#include <stdio.h>
#include "libavcodec/avcodec.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "avio.h"
#include "libavformat/version.h"

Data Structures
struct	AVProbeData
	This structure contains the data a format has to probe a file. More...

struct	AVOutputFormat

struct	AVInputFormat

struct	AVIndexEntry

struct	AVStream
	Stream structure. More...

struct	AVProgram
	New fields can be added to the end with minor version bumps. More...

struct	AVChapter

struct	AVFormatContext
	Format I/O context. More...

struct	AVPacketList

Macros
#define	AVPROBE_SCORE_RETRY (AVPROBE_SCORE_MAX/4)

#define	AVPROBE_SCORE_STREAM_RETRY (AVPROBE_SCORE_MAX/4-1)

#define	AVPROBE_SCORE_EXTENSION 50
	score for file extension

#define	AVPROBE_SCORE_MIME 75
	score for file mime type

#define	AVPROBE_SCORE_MAX 100
	maximum score

#define	AVPROBE_PADDING_SIZE 32
	extra allocated bytes at the end of the probe buffer

#define	AVFMT_NOFILE 0x0001
	Demuxer will use avio_open, no opened file should be provided by the caller.

#define	AVFMT_NEEDNUMBER 0x0002
	Needs 'd' in filename.

#define	AVFMT_SHOW_IDS 0x0008
	Show format stream IDs numbers.

#define	AVFMT_RAWPICTURE 0x0020
	Format wants AVPicture structure for raw picture data.

#define	AVFMT_GLOBALHEADER 0x0040
	Format wants global header.

#define	AVFMT_NOTIMESTAMPS 0x0080
	Format does not need / have any timestamps.

#define	AVFMT_GENERIC_INDEX 0x0100
	Use generic index building code.

#define	AVFMT_TS_DISCONT 0x0200
	Format allows timestamp discontinuities.

#define	AVFMT_VARIABLE_FPS 0x0400
	Format allows variable fps.

#define	AVFMT_NODIMENSIONS 0x0800
	Format does not need width/height.

#define	AVFMT_NOSTREAMS 0x1000
	Format does not require any streams.

#define	AVFMT_NOBINSEARCH 0x2000
	Format does not allow to fall back on binary search via read_timestamp.

#define	AVFMT_NOGENSEARCH 0x4000
	Format does not allow to fall back on generic search.

#define	AVFMT_NO_BYTE_SEEK 0x8000
	Format does not allow seeking by bytes.

#define	AVFMT_ALLOW_FLUSH 0x10000
	Format allows flushing.

#define	AVFMT_TS_NONSTRICT 0x8020000
	Format does not require strictly increasing timestamps, but they must still be monotonic.

#define	AVFMT_TS_NEGATIVE 0x40000
	Format allows muxing negative timestamps.

#define	AVFMT_SEEK_TO_PTS 0x4000000
	Seeking is based on PTS.

#define	AVINDEX_KEYFRAME 0x0001

#define	AV_DISPOSITION_DEFAULT 0x0001

#define	AV_DISPOSITION_DUB 0x0002

#define	AV_DISPOSITION_ORIGINAL 0x0004

#define	AV_DISPOSITION_COMMENT 0x0008

#define	AV_DISPOSITION_LYRICS 0x0010

#define	AV_DISPOSITION_KARAOKE 0x0020

#define	AV_DISPOSITION_FORCED 0x0040
	Track should be used during playback by default.

#define	AV_DISPOSITION_HEARING_IMPAIRED 0x0080
	stream for hearing impaired audiences

#define	AV_DISPOSITION_VISUAL_IMPAIRED 0x0100
	stream for visual impaired audiences

#define	AV_DISPOSITION_CLEAN_EFFECTS 0x0200
	stream without voice

#define	AV_DISPOSITION_ATTACHED_PIC 0x0400
	The stream is stored in the file as an attached picture/"cover art" (e.g.

#define	AV_DISPOSITION_CAPTIONS 0x10000
	To specify text track kind (different from subtitles default).

#define	AV_DISPOSITION_DESCRIPTIONS 0x20000

#define	AV_DISPOSITION_METADATA 0x40000

#define	AV_PTS_WRAP_IGNORE 0
	Options for behavior on timestamp wrap detection.

#define	AV_PTS_WRAP_ADD_OFFSET 1
	add the format specific offset on wrap detection

#define	AV_PTS_WRAP_SUB_OFFSET -1
	subtract the format specific offset on wrap detection

#define	AVSTREAM_EVENT_FLAG_METADATA_UPDATED 0x0001
	The call resulted in updated metadata.

#define	MAX_STD_TIMEBASES (30*12+7+6)
	Stream information used internally by av_find_stream_info()

#define	MAX_PROBE_PACKETS 2500
	Number of packets to buffer for codec probing.

#define	MAX_REORDER_DELAY 16

#define	AV_PROGRAM_RUNNING 1

#define	AVFMTCTX_NOHEADER 0x0001
	signal that no header is present (streams are added dynamically)

#define	AVFMT_FLAG_GENPTS 0x0001
	Generate missing pts even if it requires parsing future frames.

#define	AVFMT_FLAG_IGNIDX 0x0002
	Ignore index.

#define	AVFMT_FLAG_NONBLOCK 0x0004
	Do not block when reading packets from input.

#define	AVFMT_FLAG_IGNDTS 0x0008
	Ignore DTS on frames that contain both DTS & PTS.

#define	AVFMT_FLAG_NOFILLIN 0x0010
	Do not infer any values from other values, just return what is stored in the container.

#define	AVFMT_FLAG_NOPARSE 0x0020
	Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled.

#define	AVFMT_FLAG_NOBUFFER 0x0040
	Do not buffer frames when possible.

#define	AVFMT_FLAG_CUSTOM_IO 0x0080
	The caller has supplied a custom AVIOContext, don't avio_close() it.

#define	AVFMT_FLAG_DISCARD_CORRUPT 0x0100
	Discard frames marked corrupted.

#define	AVFMT_FLAG_FLUSH_PACKETS 0x0200
	Flush the AVIOContext every packet.

#define	AVFMT_FLAG_BITEXACT 0x0400
	When muxing, try to avoid writing any random/volatile data to the output.

#define	AVFMT_FLAG_MP4A_LATM 0x8000
	Enable RTP MP4A-LATM payload.

#define	AVFMT_FLAG_SORT_DTS 0x10000
	try to interleave outputted packets by dts (using this flag can slow demuxing down)

#define	AVFMT_FLAG_PRIV_OPT 0x20000
	Enable use of private options by delaying codec open (this could be made default once all code is converted)

#define	AVFMT_FLAG_KEEP_SIDE_DATA 0x40000
	Don't merge side data but keep it separate.

#define	FF_FDEBUG_TS 0x0001

#define	AVFMT_EVENT_FLAG_METADATA_UPDATED 0x0001
	The call resulted in updated metadata.

#define	AVFMT_AVOID_NEG_TS_AUTO -1
	Enabled when required by target format.

#define	AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE 1
	Shift timestamps so they are non negative.

#define	AVFMT_AVOID_NEG_TS_MAKE_ZERO 2
	Shift timestamps so that they start at 0.

#define	AVSEEK_FLAG_BACKWARD 1

#define	AVSEEK_FLAG_BYTE 2
	seeking based on position in bytes

#define	AVSEEK_FLAG_ANY 4
	seek to any frame, even non-keyframes

#define	AVSEEK_FLAG_FRAME 8
	seeking based on frame number

Typedefs
typedef int(*	av_format_control_message )(struct AVFormatContext s, int type, void data, size_t data_size)
	Callback used by devices to communicate with application.

Enumerations
enum	AVStreamParseType { AVSTREAM_PARSE_NONE, AVSTREAM_PARSE_FULL, AVSTREAM_PARSE_HEADERS, AVSTREAM_PARSE_TIMESTAMPS, AVSTREAM_PARSE_FULL_ONCE, AVSTREAM_PARSE_FULL_RAW =MKTAG(0,'R','A','W') }

enum	AVDurationEstimationMethod { AVFMT_DURATION_FROM_PTS, AVFMT_DURATION_FROM_STREAM, AVFMT_DURATION_FROM_BITRATE }
	The duration of a video can be estimated through various ways, and this enum can be used to know how the duration was estimated. More...

Functions
int	av_get_packet (AVIOContext s, AVPacket pkt, int size)
	Allocate and read the payload of a packet and initialize its fields with default values.

int	av_append_packet (AVIOContext s, AVPacket pkt, int size)
	Read data and append it to the current content of the AVPacket.

AVRational	av_stream_get_r_frame_rate (const AVStream *s)

void	av_stream_set_r_frame_rate (AVStream *s, AVRational r)

struct AVCodecParserContext *	av_stream_get_parser (const AVStream *s)

char *	av_stream_get_recommended_encoder_configuration (const AVStream *s)

void	av_stream_set_recommended_encoder_configuration (AVStream s, char configuration)

int64_t	av_stream_get_end_pts (const AVStream *st)
	Returns the pts of the last muxed packet + its duration.

int	av_format_get_probe_score (const AVFormatContext *s)

AVCodec *	av_format_get_video_codec (const AVFormatContext *s)

void	av_format_set_video_codec (AVFormatContext s, AVCodec c)

AVCodec *	av_format_get_audio_codec (const AVFormatContext *s)

void	av_format_set_audio_codec (AVFormatContext s, AVCodec c)

AVCodec *	av_format_get_subtitle_codec (const AVFormatContext *s)

void	av_format_set_subtitle_codec (AVFormatContext s, AVCodec c)

AVCodec *	av_format_get_data_codec (const AVFormatContext *s)

void	av_format_set_data_codec (AVFormatContext s, AVCodec c)

int	av_format_get_metadata_header_padding (const AVFormatContext *s)

void	av_format_set_metadata_header_padding (AVFormatContext *s, int c)

void *	av_format_get_opaque (const AVFormatContext *s)

void	av_format_set_opaque (AVFormatContext s, void opaque)

av_format_control_message	av_format_get_control_message_cb (const AVFormatContext *s)

void	av_format_set_control_message_cb (AVFormatContext *s, av_format_control_message callback)

void	av_format_inject_global_side_data (AVFormatContext *s)
	This function will cause global side data to be injected in the next packet of each stream as well as after any subsequent seek.

enum AVDurationEstimationMethod	av_fmt_ctx_get_duration_estimation_method (const AVFormatContext *ctx)
	Returns the method used to set ctx->duration.

unsigned	avformat_version (void)
	Return the LIBAVFORMAT_VERSION_INT constant.

const char *	avformat_configuration (void)
	Return the libavformat build-time configuration.

const char *	avformat_license (void)
	Return the libavformat license.

void	av_register_all (void)
	Initialize libavformat and register all the muxers, demuxers and protocols.

void	av_register_input_format (AVInputFormat *format)

void	av_register_output_format (AVOutputFormat *format)

int	avformat_network_init (void)
	Do global initialization of network components.

int	avformat_network_deinit (void)
	Undo the initialization done by avformat_network_init.

AVInputFormat *	av_iformat_next (const AVInputFormat *f)
	If f is NULL, returns the first registered input format, if f is non-NULL, returns the next registered input format after f or NULL if f is the last one.

AVOutputFormat *	av_oformat_next (const AVOutputFormat *f)
	If f is NULL, returns the first registered output format, if f is non-NULL, returns the next registered output format after f or NULL if f is the last one.

AVFormatContext *	avformat_alloc_context (void)
	Allocate an AVFormatContext.

void	avformat_free_context (AVFormatContext *s)
	Free an AVFormatContext and all its streams.

const AVClass *	avformat_get_class (void)
	Get the AVClass for AVFormatContext.

AVStream *	avformat_new_stream (AVFormatContext s, const AVCodec c)
	Add a new stream to a media file.

uint8_t *	av_stream_get_side_data (AVStream stream, enum AVPacketSideDataType type, int size)
	Get side information from stream.

AVProgram *	av_new_program (AVFormatContext *s, int id)

int	avformat_alloc_output_context2 (AVFormatContext *ctx, AVOutputFormat oformat, const char format_name, const char filename)
	Allocate an AVFormatContext for an output format.

AVInputFormat *	av_find_input_format (const char *short_name)
	Find AVInputFormat based on the short name of the input format.

AVInputFormat *	av_probe_input_format (AVProbeData *pd, int is_opened)
	Guess the file format.

AVInputFormat *	av_probe_input_format2 (AVProbeData pd, int is_opened, int score_max)
	Guess the file format.

AVInputFormat *	av_probe_input_format3 (AVProbeData pd, int is_opened, int score_ret)
	Guess the file format.

int	av_probe_input_buffer2 (AVIOContext pb, AVInputFormat fmt, const char filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
	Probe a bytestream to determine the input format.

int	av_probe_input_buffer (AVIOContext pb, AVInputFormat fmt, const char filename, void *logctx, unsigned int offset, unsigned int max_probe_size)
	Like av_probe_input_buffer2() but returns 0 on success.

int	avformat_open_input (AVFormatContext *ps, const char filename, AVInputFormat fmt, AVDictionary *options)
	Open an input stream and read the header.

attribute_deprecated int	av_demuxer_open (AVFormatContext *ic)

int	avformat_find_stream_info (AVFormatContext ic, AVDictionary *options)
	Read packets of a media file to get stream information.

AVProgram *	av_find_program_from_stream (AVFormatContext ic, AVProgram last, int s)
	Find the programs which belong to a given stream.

int	av_find_best_stream (AVFormatContext ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec *decoder_ret, int flags)
	Find the "best" stream in the file.

int	av_read_frame (AVFormatContext s, AVPacket pkt)
	Return the next frame of a stream.

int	av_seek_frame (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
	Seek to the keyframe at timestamp.

int	avformat_seek_file (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
	Seek to timestamp ts.

int	avformat_flush (AVFormatContext *s)
	Discard all internally buffered data.

int	av_read_play (AVFormatContext *s)
	Start playing a network-based stream (e.g.

int	av_read_pause (AVFormatContext *s)
	Pause a network-based stream (e.g.

void	avformat_close_input (AVFormatContext **s)
	Close an opened input AVFormatContext.

int	avformat_write_header (AVFormatContext s, AVDictionary *options)
	Allocate the stream private data and write the stream header to an output media file.

int	av_write_frame (AVFormatContext s, AVPacket pkt)
	Write a packet to an output media file.

int	av_interleaved_write_frame (AVFormatContext s, AVPacket pkt)
	Write a packet to an output media file ensuring correct interleaving.

int	av_write_uncoded_frame (AVFormatContext s, int stream_index, AVFrame frame)
	Write a uncoded frame to an output media file.

int	av_interleaved_write_uncoded_frame (AVFormatContext s, int stream_index, AVFrame frame)
	Write a uncoded frame to an output media file.

int	av_write_uncoded_frame_query (AVFormatContext *s, int stream_index)
	Test whether a muxer supports uncoded frame.

int	av_write_trailer (AVFormatContext *s)
	Write the stream trailer to an output media file and free the file private data.

AVOutputFormat *	av_guess_format (const char short_name, const char filename, const char *mime_type)
	Return the output format in the list of registered output formats which best matches the provided parameters, or return NULL if there is no match.

enum AVCodecID	av_guess_codec (AVOutputFormat fmt, const char short_name, const char filename, const char mime_type, enum AVMediaType type)
	Guess the codec ID based upon muxer and filename.

int	av_get_output_timestamp (struct AVFormatContext s, int stream, int64_t dts, int64_t *wall)
	Get timing information for the data currently output.

void	av_hex_dump (FILE f, const uint8_t buf, int size)
	Send a nice hexadecimal dump of a buffer to the specified file stream.

void	av_hex_dump_log (void avcl, int level, const uint8_t buf, int size)
	Send a nice hexadecimal dump of a buffer to the log.

void	av_pkt_dump2 (FILE f, const AVPacket pkt, int dump_payload, const AVStream *st)
	Send a nice dump of a packet to the specified file stream.

void	av_pkt_dump_log2 (void avcl, int level, const AVPacket pkt, int dump_payload, const AVStream *st)
	Send a nice dump of a packet to the log.

enum AVCodecID	av_codec_get_id (const struct AVCodecTag const tags, unsigned int tag)
	Get the AVCodecID for the given codec tag tag.

unsigned int	av_codec_get_tag (const struct AVCodecTag const tags, enum AVCodecID id)
	Get the codec tag for the given codec id id.

int	av_codec_get_tag2 (const struct AVCodecTag const tags, enum AVCodecID id, unsigned int *tag)
	Get the codec tag for the given codec id.

int	av_find_default_stream_index (AVFormatContext *s)

int	av_index_search_timestamp (AVStream *st, int64_t timestamp, int flags)
	Get the index for a specific timestamp.

int	av_add_index_entry (AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
	Add an index entry into a sorted list.

void	av_url_split (char proto, int proto_size, char authorization, int authorization_size, char hostname, int hostname_size, int port_ptr, char path, int path_size, const char url)
	Split a URL string into components.

void	av_dump_format (AVFormatContext ic, int index, const char url, int is_output)
	Print detailed information about the input or output format, such as duration, bitrate, streams, container, programs, metadata, side data, codec and time base.

int	av_get_frame_filename (char buf, int buf_size, const char path, int number)
	Return in 'buf' the path with 'd' replaced by a number.

int	av_filename_number_test (const char *filename)
	Check whether filename actually is a numbered sequence generator.

int	av_sdp_create (AVFormatContext ac[], int n_files, char buf, int size)
	Generate an SDP for an RTP session.

int	av_match_ext (const char filename, const char extensions)
	Return a positive value if the given filename has one of the given extensions, 0 otherwise.

int	avformat_query_codec (const AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
	Test if the given container can store a codec.

struct AVCodecTag *	avformat_get_riff_video_tags (void)

struct AVCodecTag *	avformat_get_riff_audio_tags (void)

struct AVCodecTag *	avformat_get_mov_video_tags (void)

struct AVCodecTag *	avformat_get_mov_audio_tags (void)

AVRational	av_guess_sample_aspect_ratio (AVFormatContext format, AVStream stream, AVFrame *frame)
	Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio.

AVRational	av_guess_frame_rate (AVFormatContext ctx, AVStream stream, AVFrame *frame)
	Guess the frame rate, based on both the container and codec information.

int	avformat_match_stream_specifier (AVFormatContext s, AVStream st, const char *spec)
	Check if the stream st contained in s is matched by the stream specifier spec.

int	avformat_queue_attached_pictures (AVFormatContext *s)

Detailed Description

Main libavformat public API header.

Definition in file avformat.h.

Macro Definition Documentation

#define AVPROBE_SCORE_RETRY (AVPROBE_SCORE_MAX/4)

Definition at line 408 of file avformat.h.

Referenced by av_probe_input_buffer2(), init_input(), and sup_probe().

#define AVPROBE_SCORE_STREAM_RETRY (AVPROBE_SCORE_MAX/4-1)

Definition at line 409 of file avformat.h.

Referenced by probe_codec().

#define AVPROBE_SCORE_EXTENSION 50

score for file extension

Definition at line 411 of file avformat.h.

Referenced by ac3_eac3_probe(), adts_aac_probe(), alias_pix_read_probe(), aqt_probe(), av_probe_input_format3(), avr_probe(), avs_probe(), bmp_probe(), cavsvideo_probe(), cdxl_read_probe(), dpx_probe(), dts_probe(), dvbsub_probe(), exr_probe(), ff_spdif_probe(), flac_probe(), h261_probe(), h263_probe(), h264_probe(), hevc_probe(), idcin_probe(), img_read_probe(), j2k_probe(), jacosub_probe(), jpeg_probe(), jpegls_probe(), libquvi_probe(), loas_probe(), lvf_probe(), matroska_probe(), modplug_probe(), mov_probe(), mp3_read_probe(), mpc8_probe(), mpeg4video_probe(), mpegps_probe(), mpegvideo_probe(), mpsub_probe(), mtv_probe(), nsv_probe(), oma_read_probe(), pictor_probe(), probe(), pva_probe(), read_gab2_sub(), realtext_probe(), sdr2_probe(), sgi_probe(), str_probe(), subviewer1_probe(), subviewer_probe(), sunrast_probe(), sup_probe(), tak_probe(), tedcaptions_read_probe(), tiff_probe(), tta_probe(), vc1t_probe(), vmd_probe(), vqf_probe(), wsaud_probe(), and xa_probe().

#define AVPROBE_SCORE_MIME 75

score for file mime type

Definition at line 412 of file avformat.h.

Referenced by av_probe_input_format3().

#define AVPROBE_SCORE_MAX 100

maximum score

Definition at line 413 of file avformat.h.

Referenced by adp_probe(), aea_read_probe(), aiff_probe(), alias_pix_read_probe(), amr_probe(), apc_probe(), ape_probe(), apng_probe(), asf_probe(), ass_probe(), ast_probe(), avi_probe(), bfi_probe(), brender_read_probe(), cdata_probe(), cin_probe(), cine_read_probe(), concat_probe(), dfa_probe(), dirac_probe(), dnxhd_probe(), dsf_probe(), dss_probe(), dtshd_probe(), dv_probe(), dxa_probe(), ea_probe(), epaf_probe(), ff_spdif_probe(), ffm_probe(), film_probe(), fourxm_probe(), frm_read_probe(), gif_probe(), gxf_probe(), hls_probe(), hnm_probe(), iff_probe(), ilbc_probe(), img_read_probe(), ipmovie_probe(), ircam_probe(), iss_probe(), lmlm4_probe(), lvf_probe(), lxf_probe(), matroska_probe(), microdvd_probe(), mmf_probe(), mov_probe(), mpc8_probe(), mpc_probe(), mpegts_probe(), mpl2_probe(), msnwc_tcp_probe(), mtv_probe(), mv_probe(), mxf_probe(), nc_probe(), nist_probe(), nsv_probe(), nut_probe(), nuv_probe(), ogg_probe(), oma_read_probe(), pjs_probe(), pmp_probe(), png_probe(), probe(), probe_gme(), pva_probe(), pvf_probe(), qcp_probe(), r3d_probe(), read_probe(), redspark_probe(), rl2_probe(), rm_probe(), roq_probe(), rpl_probe(), rsd_probe(), rtsp_probe(), sami_probe(), sap_probe(), sbg_read_probe(), seq_probe(), siff_probe(), smacker_probe(), smjpeg_probe(), smush_read_probe(), sol_probe(), sox_probe(), srt_probe(), stl_probe(), subviewer_probe(), sup_probe(), swf_probe(), tedcaptions_read_probe(), thp_probe(), tmv_probe(), txd_probe(), v4l2_read_probe(), vid_probe(), vivo_probe(), voc_probe(), vplayer_probe(), vqf_probe(), wc3_probe(), webp_probe(), webvtt_probe(), wsvqa_probe(), wv_probe(), xmv_probe(), xwma_probe(), yop_probe(), and yuv4_probe().

#define AVPROBE_PADDING_SIZE 32

extra allocated bytes at the end of the probe buffer

Definition at line 415 of file avformat.h.

Referenced by av_probe_input_buffer2(), av_probe_input_format3(), ff_img_read_header(), ff_img_read_packet(), main(), probe_codec(), and read_gab2_sub().

#define AVFMT_NOFILE 0x0001

Demuxer will use avio_open, no opened file should be provided by the caller.

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

Definition at line 418 of file avformat.h.

Referenced by av_probe_input_format3(), avformat_close_input(), estimate_timings(), ff_img_read_header(), ffmpeg_cleanup(), init_input(), main(), open_output_file(), open_slave(), print_times(), probe(), seg_write_header(), tee_write_trailer(), and write_header().

#define AVFMT_NEEDNUMBER 0x0002

Needs 'd' in filename.

Definition at line 419 of file avformat.h.

Referenced by avformat_open_input(), and open_output_file().

#define AVFMT_SHOW_IDS 0x0008

Show format stream IDs numbers.

Definition at line 420 of file avformat.h.

Referenced by dump_stream_format(), and show_stream().

#define AVFMT_RAWPICTURE 0x0020

Format wants AVPicture structure for raw picture data.

Examples:: muxing.c.

Definition at line 421 of file avformat.h.

Referenced by do_video_out(), flush_encoders(), and write_video_frame().

#define AVFMT_GLOBALHEADER 0x0040

Format wants global header.

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

Definition at line 423 of file avformat.h.

Referenced by add_stream(), init_muxer(), main(), new_output_stream(), and open_output_file().

#define AVFMT_NOTIMESTAMPS 0x0080

Format does not need / have any timestamps.

Definition at line 424 of file avformat.h.

Referenced by av_interleaved_write_frame(), av_write_frame(), avformat_find_stream_info(), avformat_write_header(), do_video_out(), and write_frame().

#define AVFMT_GENERIC_INDEX 0x0100

Use generic index building code.

Definition at line 425 of file avformat.h.

Referenced by av_read_frame(), and read_frame_internal().

#define AVFMT_TS_DISCONT 0x0200

Format allows timestamp discontinuities.

Note, muxers always require valid (monotone) timestamps

Definition at line 426 of file avformat.h.

Referenced by process_input(), and read_thread().

#define AVFMT_VARIABLE_FPS 0x0400

Format allows variable fps.

Definition at line 427 of file avformat.h.

Referenced by do_video_out(), and transcode_init().

#define AVFMT_NODIMENSIONS 0x0800

Format does not need width/height.

Definition at line 428 of file avformat.h.

Referenced by init_muxer().

#define AVFMT_NOSTREAMS 0x1000

Format does not require any streams.

Definition at line 429 of file avformat.h.

Referenced by init_muxer(), and transcode_init().

#define AVFMT_NOBINSEARCH 0x2000

Format does not allow to fall back on binary search via read_timestamp.

Definition at line 430 of file avformat.h.

Referenced by seek_frame_internal(), and stream_component_open().

#define AVFMT_NOGENSEARCH 0x4000

Format does not allow to fall back on generic search.

Definition at line 431 of file avformat.h.

Referenced by seek_frame_internal(), and stream_component_open().

#define AVFMT_NO_BYTE_SEEK 0x8000

Format does not allow seeking by bytes.

Definition at line 432 of file avformat.h.

Referenced by seek_frame_internal(), and stream_component_open().

#define AVFMT_ALLOW_FLUSH 0x10000

Format allows flushing.

If not set, the muxer will not receive a NULL packet in the write_packet function.

Definition at line 433 of file avformat.h.

Referenced by av_write_frame().

#define AVFMT_TS_NONSTRICT 0x8020000

Format does not require strictly increasing timestamps, but they must still be monotonic.

Definition at line 435 of file avformat.h.

Referenced by compute_pkt_fields2(), and write_frame().

#define AVFMT_TS_NEGATIVE 0x40000

Format allows muxing negative timestamps.

If not set the timestamp will be shifted in av_write_frame and av_interleaved_write_frame so they start from 0. The user or muxer can override this through AVFormatContext.avoid_negative_ts

Definition at line 442 of file avformat.h.

Referenced by avformat_write_header().

#define AVFMT_SEEK_TO_PTS 0x4000000

Seeking is based on PTS.

Definition at line 451 of file avformat.h.

#define AVINDEX_KEYFRAME 0x0001

Definition at line 736 of file avformat.h.

Referenced by ape_read_header(), asf_build_simple_index(), asf_read_pts(), av_read_frame(), avi_read_idx1(), avi_sync(), cine_read_header(), clean_index(), ff_img_read_packet(), ff_index_search_timestamp(), ff_voc_get_packet(), find_and_decode_index(), flv_read_packet(), matroska_add_index_entries(), matroska_parse_block(), mov_build_index(), mov_read_packet(), mov_read_trun(), mpc8_parse_seektable(), mpc_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), mv_read_header(), mxf_compute_ptses_fake_index(), nsv_parse_NSVs_header(), nut_write_packet(), nuv_read_dts(), parse_keyframes_index(), pmp_header(), pva_read_header(), read_braindead_odml_indx(), read_frame_internal(), read_header(), read_index(), read_pakt_chunk(), read_part_of_packet(), read_xing_toc(), rl2_read_header(), rm_read_dts(), rm_read_index(), rm_read_packet(), scan_file(), tta_read_header(), wv_read_packet(), and xwma_read_header().

#define AV_DISPOSITION_DEFAULT 0x0001

Definition at line 742 of file avformat.h.

Referenced by dump_stream_format(), enable_tracks(), matroska_parse_tracks(), mkv_write_track(), mkv_write_tracks(), mov_read_tkhd(), new_rendition(), and transcode_init().

#define AV_DISPOSITION_DUB 0x0002

Definition at line 743 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_ORIGINAL 0x0004

Definition at line 744 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_COMMENT 0x0008

Definition at line 745 of file avformat.h.

Referenced by avformat_find_stream_info(), and dump_stream_format().

#define AV_DISPOSITION_LYRICS 0x0010

Definition at line 746 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_KARAOKE 0x0020

Definition at line 747 of file avformat.h.

Referenced by avformat_find_stream_info(), and dump_stream_format().

#define AV_DISPOSITION_FORCED 0x0040

Track should be used during playback by default.

Useful for subtitle track that should be displayed even when user did not explicitly ask for subtitles.

Definition at line 754 of file avformat.h.

Referenced by dump_stream_format(), matroska_parse_tracks(), mkv_write_track(), and new_rendition().

#define AV_DISPOSITION_HEARING_IMPAIRED 0x0080

stream for hearing impaired audiences

Definition at line 755 of file avformat.h.

Referenced by av_find_best_stream(), avformat_find_stream_info(), dump_stream_format(), ff_parse_mpeg2_descriptor(), mpegts_write_pmt(), new_rendition(), and parse_chunks().

#define AV_DISPOSITION_VISUAL_IMPAIRED 0x0100

stream for visual impaired audiences

Definition at line 756 of file avformat.h.

Referenced by av_find_best_stream(), avformat_find_stream_info(), dump_stream_format(), ff_parse_mpeg2_descriptor(), mpegts_write_pmt(), new_rendition(), and parse_chunks().

#define AV_DISPOSITION_CLEAN_EFFECTS 0x0200

stream without voice

Definition at line 757 of file avformat.h.

Referenced by avformat_find_stream_info(), dump_stream_format(), ff_parse_mpeg2_descriptor(), and mpegts_write_pmt().

#define AV_DISPOSITION_ATTACHED_PIC 0x0400

The stream is stored in the file as an attached picture/"cover art" (e.g.

APIC frame in ID3v2). The single packet associated with it will be returned among the first few packets read from the file unless seeking takes place. It can also be accessed at any time in AVStream.attached_pic.

Definition at line 764 of file avformat.h.

Referenced by ape_tag_read_field(), asf_read_picture(), av_find_default_stream_index(), avformat_find_stream_info(), avformat_queue_attached_pictures(), ff_flac_parse_picture(), ff_id3v2_parse_apic(), get_attachment(), mov_read_covr(), open_output_file(), read_thread(), and select_reference_stream().

#define AV_DISPOSITION_CAPTIONS 0x10000

To specify text track kind (different from subtitles default).

Definition at line 769 of file avformat.h.

Referenced by mkv_write_track().

#define AV_DISPOSITION_DESCRIPTIONS 0x20000

Definition at line 770 of file avformat.h.

Referenced by mkv_write_track().

#define AV_DISPOSITION_METADATA 0x40000

Definition at line 771 of file avformat.h.

Referenced by mkv_write_track().

#define AV_PTS_WRAP_IGNORE 0

Options for behavior on timestamp wrap detection.

ignore the wrap

Definition at line 776 of file avformat.h.

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

#define AV_PTS_WRAP_ADD_OFFSET 1

add the format specific offset on wrap detection

Definition at line 777 of file avformat.h.

Referenced by update_wrap_reference(), and wrap_timestamp().

#define AV_PTS_WRAP_SUB_OFFSET -1

subtract the format specific offset on wrap detection

Definition at line 778 of file avformat.h.

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

#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED 0x0001

The call resulted in updated metadata.

Definition at line 911 of file avformat.h.

Referenced by decode_info_header(), ff_vorbis_stream_comment(), and flv_write_packet().

#define MAX_STD_TIMEBASES (30*12+7+6)

Stream information used internally by av_find_stream_info()

Definition at line 924 of file avformat.h.

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

#define MAX_PROBE_PACKETS 2500

Number of packets to buffer for codec probing.

Definition at line 971 of file avformat.h.

Referenced by avformat_new_stream(), ff_read_frame_flush(), and set_codec_from_probe_data().

#define MAX_REORDER_DELAY 16

Definition at line 988 of file avformat.h.

Referenced by avformat_new_stream(), compute_pkt_fields(), compute_pkt_fields2(), estimate_timings_from_pts(), ff_read_frame_flush(), and update_initial_timestamps().

#define AV_PROGRAM_RUNNING 1

Definition at line 1133 of file avformat.h.

#define AVFMTCTX_NOHEADER 0x0001

signal that no header is present (streams are added dynamically)

Definition at line 1167 of file avformat.h.

Referenced by amf_parse_object(), avformat_find_stream_info(), avs_read_header(), cdxl_read_header(), create_stream(), ff_img_read_header(), ff_rtsp_open_transport_ctx(), flv_read_header(), handle_packet(), hls_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().

#define AVFMT_FLAG_GENPTS 0x0001

Generate missing pts even if it requires parsing future frames.

Definition at line 1317 of file avformat.h.

Referenced by av_read_frame(), open_input_stream(), and read_thread().

#define AVFMT_FLAG_IGNIDX 0x0002

Ignore index.

Definition at line 1318 of file avformat.h.

Referenced by avi_read_header(), gxf_read_index(), matroska_add_index_entries(), matroska_parse_cues(), mov_read_default(), parse_keyframes_index(), and rm_read_header().

#define AVFMT_FLAG_NONBLOCK 0x0004

Do not block when reading packets from input.

Definition at line 1319 of file avformat.h.

Referenced by device_open(), dshow_read_packet(), fbdev_read_header(), fbdev_read_packet(), ff_alsa_open(), gdigrab_read_packet(), open_input_file(), pulse_write_header(), vfw_read_packet(), and write_header().

#define AVFMT_FLAG_IGNDTS 0x0008

Ignore DTS on frames that contain both DTS & PTS.

Definition at line 1320 of file avformat.h.

Referenced by compute_pkt_fields().

#define AVFMT_FLAG_NOFILLIN 0x0010

Do not infer any values from other values, just return what is stored in the container.

Definition at line 1321 of file avformat.h.

Referenced by compute_pkt_fields(), and extract_mpeg4_header().

#define AVFMT_FLAG_NOPARSE 0x0020

Do not use AVParsers, you also must set AVFMT_FLAG_NOFILLIN as the fillin code works on frames and no parsing -> no frames. Also seeking to frames can not work if parsing to find frame boundaries has been disabled.

Definition at line 1322 of file avformat.h.

Referenced by avformat_find_stream_info(), extract_mpeg4_header(), and read_frame_internal().

#define AVFMT_FLAG_NOBUFFER 0x0040

Do not buffer frames when possible.

Definition at line 1323 of file avformat.h.

Referenced by avformat_find_stream_info().

#define AVFMT_FLAG_CUSTOM_IO 0x0080

The caller has supplied a custom AVIOContext, don't avio_close() it.

Definition at line 1324 of file avformat.h.

Referenced by avformat_close_input(), avformat_open_input(), hls_read_header(), and init_input().

#define AVFMT_FLAG_DISCARD_CORRUPT 0x0100

Discard frames marked corrupted.

Definition at line 1325 of file avformat.h.

Referenced by ff_read_packet().

#define AVFMT_FLAG_FLUSH_PACKETS 0x0200

Flush the AVIOContext every packet.

Definition at line 1326 of file avformat.h.

Referenced by av_write_frame(), avformat_write_header(), and write_packet().

#define AVFMT_FLAG_BITEXACT 0x0400

When muxing, try to avoid writing any random/volatile data to the output.

This includes any random IDs, real-time timestamps/dates, muxer version, etc.

This flag is mainly intended for testing.

Definition at line 1333 of file avformat.h.

Referenced by ff_framehash_write_header(), flac_write_header(), init_muxer(), lrc_write_header(), mkv_write_attachments(), mkv_write_header(), mov_write_header(), mov_write_track_udta_tag(), mxf_write_header(), mxf_write_identification(), ogg_write_header(), put_flac_codecpriv(), rtp_write_header(), set_encoder_id(), and write_sm_data().

#define AVFMT_FLAG_MP4A_LATM 0x8000

Enable RTP MP4A-LATM payload.

Definition at line 1334 of file avformat.h.

Referenced by ff_rtp_chain_mux_open().

#define AVFMT_FLAG_SORT_DTS 0x10000

try to interleave outputted packets by dts (using this flag can slow demuxing down)

Definition at line 1335 of file avformat.h.

Referenced by avi_read_header().

#define AVFMT_FLAG_PRIV_OPT 0x20000

Enable use of private options by delaying codec open (this could be made default once all code is converted)

Definition at line 1336 of file avformat.h.

Referenced by avformat_open_input().

#define AVFMT_FLAG_KEEP_SIDE_DATA 0x40000

Don't merge side data but keep it separate.

Definition at line 1337 of file avformat.h.

Referenced by read_frame_internal().

#define FF_FDEBUG_TS 0x0001

Definition at line 1458 of file avformat.h.

Referenced by read_frame_internal().

#define AVFMT_EVENT_FLAG_METADATA_UPDATED 0x0001

The call resulted in updated metadata.

Definition at line 1490 of file avformat.h.

Referenced by amf_parse_object(), decode_info_header(), flac_read_header(), mov_metadata_gnre(), mov_metadata_int8_bypass_padding(), mov_metadata_int8_no_padding(), mov_metadata_loci(), mov_metadata_track_or_disc_number(), mov_read_udta_string(), and read_frame_internal().

#define AVFMT_AVOID_NEG_TS_AUTO -1

Enabled when required by target format.

Definition at line 1506 of file avformat.h.

Referenced by avformat_write_header(), and mov_write_header().

#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE 1

Shift timestamps so they are non negative.

Definition at line 1507 of file avformat.h.

Referenced by avformat_write_header().

#define AVFMT_AVOID_NEG_TS_MAKE_ZERO 2

Shift timestamps so that they start at 0.

Definition at line 1508 of file avformat.h.

Referenced by dash_write_packet(), ff_mov_write_packet(), mov_write_header(), and write_packet().

#define AVSEEK_FLAG_BACKWARD 1

seek backward

Definition at line 2179 of file avformat.h.

Referenced by av_seek_frame(), avformat_seek_file(), avi_read_packet(), avi_read_seek(), ff_gen_search(), ff_index_search_timestamp(), ff_pcm_read_seek(), ff_seek_frame_binary(), ffm_seek(), gxf_seek(), hls_read_seek(), matroska_read_seek(), movie_common_init(), mp3_seek(), nut_read_seek(), nut_write_packet(), read_seek(), rewind_file(), rl2_read_seek(), rtmp_read_seek(), and vqf_read_seek().

#define AVSEEK_FLAG_BYTE 2

seeking based on position in bytes

Definition at line 2180 of file avformat.h.

Referenced by cine_read_seek(), concat_seek(), ff_subtitles_queue_seek(), hls_read_seek(), mv_read_seek(), read_seek(), read_thread(), rtmp_read_seek(), seek_frame_internal(), and stream_seek().

#define AVSEEK_FLAG_ANY 4

seek to any frame, even non-keyframes

Definition at line 2181 of file avformat.h.

Referenced by avformat_seek_file(), avi_read_packet(), avi_read_seek(), ff_add_index_entry(), ff_index_search_timestamp(), gxf_seek(), hls_read_packet(), hls_read_seek(), matroska_read_seek(), ogg_read_seek(), read_packet(), and recheck_discard_flags().

#define AVSEEK_FLAG_FRAME 8

seeking based on frame number

Definition at line 2182 of file avformat.h.

Referenced by cine_read_seek(), concat_seek(), ff_subtitles_queue_seek(), mv_read_seek(), and read_seek().

Typedef Documentation

typedef int(* av_format_control_message)(struct AVFormatContext *s, int type, void *data, size_t data_size)

Callback used by devices to communicate with application.

Definition at line 1181 of file avformat.h.

Enumeration Type Documentation

enum AVStreamParseType

Enumerator:

AVSTREAM_PARSE_NONE
AVSTREAM_PARSE_FULL	full parsing and repack
AVSTREAM_PARSE_HEADERS	Only parse headers, do not repack.
AVSTREAM_PARSE_TIMESTAMPS	full parsing and interpolation of timestamps for frames not starting on a packet boundary
AVSTREAM_PARSE_FULL_ONCE	full parsing and repack of the first frame only, only implemented for H.264 currently
AVSTREAM_PARSE_FULL_RAW	full parsing and repack with timestamp and position generation by parser for raw this assumes that each packet in the file contains no demuxer level headers and just codec level data, otherwise position generation would fail

Definition at line 717 of file avformat.h.

enum AVDurationEstimationMethod

The duration of a video can be estimated through various ways, and this enum can be used to know how the duration was estimated.

Enumerator:

AVFMT_DURATION_FROM_PTS	Duration accurately estimated from PTSes.
AVFMT_DURATION_FROM_STREAM	Duration estimated from a stream with a known duration.
AVFMT_DURATION_FROM_BITRATE	Duration estimated from bitrate (less accurate)

Definition at line 1189 of file avformat.h.

Function Documentation

int av_get_packet	(	AVIOContext *	s,
		AVPacket *	pkt,
		int	size
	)

Allocate and read the payload of a packet and initialize its fields with default values.

Parameters

s	associated IO context
pkt	packet
size	desired payload size

Returns: >0 (read size) if OK, AVERROR_xxx otherwise

Definition at line 240 of file utils.c.

Referenced by adp_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), apc_read_packet(), ape_tag_read_field(), asf_read_header(), asf_read_picture(), ast_read_packet(), av_append_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), cine_read_packet(), daud_packet(), dfa_read_packet(), dsf_read_packet(), dxa_read_packet(), ea_read_packet(), ff_pcm_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_voc_get_packet(), film_read_packet(), flv_data_packet(), flv_read_packet(), fourxm_read_packet(), frm_read_packet(), g729_read_packet(), get_attachment(), gif_read_packet(), gsm_read_packet(), gxf_packet(), hnm_read_packet(), idcin_read_packet(), iff_read_packet(), ingenient_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_packet(), lvf_read_packet(), mmf_read_packet(), mov_read_covr(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), msnwc_tcp_read_packet(), mtv_read_packet(), mv_read_packet(), mxf_decrypt_triplet(), mxf_get_d10_aes3_packet(), mxf_read_packet(), mxf_read_packet_old(), nc_read_packet(), nsv_read_chunk(), nuv_packet(), oma_read_packet(), pmp_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), read_packet(), redspark_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), sdr2_read_packet(), seq_read_packet(), siff_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), sup_read_packet(), swf_read_packet(), thp_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vc1t_read_packet(), vid_read_packet(), vivo_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xwma_read_packet(), yop_read_packet(), and yuv4_read_packet().

int av_append_packet	(	AVIOContext *	s,
		AVPacket *	pkt,
		int	size
	)

Read data and append it to the current content of the AVPacket.

If pkt->size is 0 this is identical to av_get_packet. Note that this uses av_grow_packet and thus involves a realloc which is inefficient. Thus this function should only be used when there is no reasonable way to know (an upper bound of) the final size.

Parameters

s	associated IO context
pkt	packet
size	amount of data to read

Returns: >0 (read size) if OK, AVERROR_xxx otherwise, previous data will not be lost even if an error occurs.

Definition at line 250 of file utils.c.

Referenced by apng_read_packet(), dfa_read_packet(), ea_read_packet(), read_packet(), sup_read_packet(), vivo_read_packet(), wc3_read_header(), and wc3_read_packet().

AVRational av_stream_get_r_frame_rate ( const AVStream * s )

void av_stream_set_r_frame_rate	(	AVStream *	s,
		AVRational	r
	)

struct AVCodecParserContext* av_stream_get_parser ( const AVStream * s )

read

Definition at line 121 of file utils.c.

Referenced by process_input_packet().

char* av_stream_get_recommended_encoder_configuration ( const AVStream * s )

Referenced by add_av_stream(), and read_ffserver_streams().

void av_stream_set_recommended_encoder_configuration	(	AVStream *	s,
		char *	configuration
	)

Referenced by add_av_stream(), and add_codec().

int64_t av_stream_get_end_pts ( const AVStream * st )

Returns the pts of the last muxed packet + its duration.

the retuned value is undefined when used with a demuxer.

Definition at line 116 of file utils.c.

Referenced by do_video_stats(), and print_report().

int av_format_get_probe_score ( const AVFormatContext * s )

Definition at line 169 of file utils.c.

Referenced by show_format().

AVCodec* av_format_get_video_codec ( const AVFormatContext * s )

void av_format_set_video_codec	(	AVFormatContext *	s,
		AVCodec *	c
	)

Referenced by open_input_file().

AVCodec* av_format_get_audio_codec ( const AVFormatContext * s )

void av_format_set_audio_codec	(	AVFormatContext *	s,
		AVCodec *	c
	)

Referenced by open_input_file().

AVCodec* av_format_get_subtitle_codec ( const AVFormatContext * s )

void av_format_set_subtitle_codec	(	AVFormatContext *	s,
		AVCodec *	c
	)

Referenced by open_input_file().

AVCodec* av_format_get_data_codec ( const AVFormatContext * s )

void av_format_set_data_codec	(	AVFormatContext *	s,
		AVCodec *	c
	)

Referenced by open_input_file().

int av_format_get_metadata_header_padding ( const AVFormatContext * s )

void av_format_set_metadata_header_padding	(	AVFormatContext *	s,
		int	c
	)

void* av_format_get_opaque ( const AVFormatContext * s )

void av_format_set_opaque	(	AVFormatContext *	s,
		void *	opaque
	)

av_format_control_message av_format_get_control_message_cb ( const AVFormatContext * s )

Referenced by avdevice_dev_to_app_control_message().

void av_format_set_control_message_cb	(	AVFormatContext *	s,
		av_format_control_message	callback
	)

void av_format_inject_global_side_data ( AVFormatContext * s )

This function will cause global side data to be injected in the next packet of each stream as well as after any subsequent seek.

Definition at line 126 of file utils.c.

Referenced by read_thread().

enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method ( const AVFormatContext * ctx )

Returns the method used to set ctx->duration.

Returns: AVFMT_DURATION_FROM_PTS, AVFMT_DURATION_FROM_STREAM, or AVFMT_DURATION_FROM_BITRATE.

Definition at line 124 of file options.c.

int avformat_alloc_output_context2	(	AVFormatContext **	ctx,
		AVOutputFormat *	oformat,
		const char *	format_name,
		const char *	filename
	)

Allocate an AVFormatContext for an output format.

avformat_free_context() can be used to free the context and everything allocated by the framework within it.

Parameters

*ctx	is set to the created format context, or to NULL in case of failure
oformat	format to use for allocating the context, if NULL format_name and filename are used instead
format_name	the name of output format to use for allocating the context, if NULL filename is used instead
filename	the name of the filename to use for allocating the context, may be NULL

Returns: >= 0 in case of success, a negative AVERROR code in case of failure

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

Definition at line 118 of file mux.c.

Referenced by avdevice_list_output_sinks(), hls_mux_init(), main(), open_output_file(), open_slave(), segment_mux_init(), and write_packet().

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation