libavformat/avformat.h File Reference

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"

Go to the source code of this file.

Data Structures

struct  AVFrac
 The exact value of the fractional number is: 'val + num / den'. More...
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

Defines

#define AVPROBE_SCORE_MAX   100
 maximum score, half of that is used for file-extension-based detection
#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 fallback to binary search via read_timestamp.
#define AVFMT_NOGENSEARCH   0x4000
 Format does not allow to fallback to 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_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 MAX_STD_TIMEBASES   (60*12+5)
 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_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_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
 Dont merge side data but keep it separate.
#define FF_FDEBUG_TS   0x0001
#define RAW_PACKET_BUFFER_SIZE   2500000
 Remaining size available for raw_packet_buffer, in bytes.
#define AVSEEK_FLAG_BACKWARD   1
 seek backward
#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

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')
}

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.
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.
AVInputFormatav_iformat_next (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.
AVOutputFormatav_oformat_next (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.
AVFormatContextavformat_alloc_context (void)
 Allocate an AVFormatContext.
void avformat_free_context (AVFormatContext *s)
 Free an AVFormatContext and all its streams.
const AVClassavformat_get_class (void)
 Get the AVClass for AVFormatContext.
AVStreamavformat_new_stream (AVFormatContext *s, AVCodec *c)
 Add a new stream to a media file.
AVProgramav_new_program (AVFormatContext *s, int id)
attribute_deprecated
AVFormatContext
avformat_alloc_output_context (const char *format, AVOutputFormat *oformat, const char *filename)
int avformat_alloc_output_context2 (AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
 Allocate an AVFormatContext for an output format.
AVInputFormatav_find_input_format (const char *short_name)
 Find AVInputFormat based on the short name of the input format.
AVInputFormatav_probe_input_format (AVProbeData *pd, int is_opened)
 Guess the file format.
AVInputFormatav_probe_input_format2 (AVProbeData *pd, int is_opened, int *score_max)
 Guess the file format.
AVInputFormatav_probe_input_format3 (AVProbeData *pd, int is_opened, int *score_ret)
 Guess the file format.
int av_probe_input_buffer (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 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)
attribute_deprecated int av_find_stream_info (AVFormatContext *ic)
 Read packets of a media file to get stream information.
int avformat_find_stream_info (AVFormatContext *ic, AVDictionary **options)
 Read packets of a media file to get stream information.
AVProgramav_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.
attribute_deprecated int av_read_packet (AVFormatContext *s, AVPacket *pkt)
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 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.
attribute_deprecated void av_close_input_file (AVFormatContext *s)
void avformat_close_input (AVFormatContext **s)
 Close an opened input AVFormatContext.
attribute_deprecated AVStreamav_new_stream (AVFormatContext *s, int id)
 Add a new stream to a media file.
attribute_deprecated void av_set_pts_info (AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
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.
attribute_deprecated int av_interleave_packet_per_dts (AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
int av_write_trailer (AVFormatContext *s)
 Write the stream trailer to an output media file and free the file private data.
AVOutputFormatav_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 CodecID 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, 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, uint8_t *buf, int size)
 Send a nice hexadecimal dump of a buffer to the log.
void av_pkt_dump2 (FILE *f, AVPacket *pkt, int dump_payload, AVStream *st)
 Send a nice dump of a packet to the specified file stream.
void av_pkt_dump_log2 (void *avcl, int level, AVPacket *pkt, int dump_payload, AVStream *st)
 Send a nice dump of a packet to the log.
enum CodecID av_codec_get_id (const struct AVCodecTag *const *tags, unsigned int tag)
 Get the CodecID for the given codec tag tag.
unsigned int av_codec_get_tag (const struct AVCodecTag *const *tags, enum CodecID id)
 Get the codec tag for the given codec id 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)
int64_t av_gettime (void)
 Get the current time in microseconds.
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 (AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
 Test if the given container can store a codec.
struct AVCodecTagavformat_get_riff_video_tags (void)
struct AVCodecTagavformat_get_riff_audio_tags (void)
AVRational av_guess_sample_aspect_ratio (AVFormatContext *format, AVStream *stream, AVFrame *frame)
 Guesses the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio.


Detailed Description

Main libavformat public API header.

Definition in file avformat.h.


Define Documentation

#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 616 of file avformat.h.

Referenced by av_find_default_stream_index(), ff_id3v2_parse_apic(), and queue_attached_pictures().

#define AV_DISPOSITION_CLEAN_EFFECTS   0x0200

stream without voice

Definition at line 609 of file avformat.h.

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

#define AV_DISPOSITION_COMMENT   0x0008

Definition at line 597 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_DEFAULT   0x0001

Definition at line 594 of file avformat.h.

Referenced by dump_stream_format(), matroska_read_header(), and mkv_write_tracks().

#define AV_DISPOSITION_DUB   0x0002

Definition at line 595 of file avformat.h.

Referenced by 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 606 of file avformat.h.

Referenced by dump_stream_format(), and matroska_read_header().

#define AV_DISPOSITION_HEARING_IMPAIRED   0x0080

stream for hearing impaired audiences

Definition at line 607 of file avformat.h.

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

#define AV_DISPOSITION_KARAOKE   0x0020

Definition at line 599 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_LYRICS   0x0010

Definition at line 598 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_ORIGINAL   0x0004

Definition at line 596 of file avformat.h.

Referenced by dump_stream_format().

#define AV_DISPOSITION_VISUAL_IMPAIRED   0x0100

stream for visual impaired audiences

Definition at line 608 of file avformat.h.

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

#define AV_PROGRAM_RUNNING   1

Definition at line 806 of file avformat.h.

#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 353 of file avformat.h.

Referenced by av_write_frame().

#define AVFMT_FLAG_CUSTOM_IO   0x0080

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

Definition at line 929 of file avformat.h.

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

#define AVFMT_FLAG_DISCARD_CORRUPT   0x0100

Discard frames marked corrupted.

Definition at line 930 of file avformat.h.

Referenced by ff_read_packet().

#define AVFMT_FLAG_GENPTS   0x0001

Generate missing pts even if it requires parsing future frames.

Definition at line 923 of file avformat.h.

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

#define AVFMT_FLAG_IGNDTS   0x0008

Ignore DTS on frames that contain both DTS & PTS.

Definition at line 926 of file avformat.h.

Referenced by compute_pkt_fields().

#define AVFMT_FLAG_IGNIDX   0x0002

#define AVFMT_FLAG_KEEP_SIDE_DATA   0x40000

Dont merge side data but keep it separate.

Definition at line 934 of file avformat.h.

Referenced by ff_read_packet().

#define AVFMT_FLAG_MP4A_LATM   0x8000

Enable RTP MP4A-LATM payload.

Definition at line 931 of file avformat.h.

Referenced by ff_rtp_chain_mux_open().

#define AVFMT_FLAG_NOFILLIN   0x0010

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

Definition at line 927 of file avformat.h.

Referenced by compute_pkt_fields().

#define AVFMT_FLAG_NONBLOCK   0x0004

Do not block when reading packets from input.

Definition at line 925 of file avformat.h.

Referenced by device_open(), dshow_read_packet(), fbdev_read_header(), fbdev_read_packet(), ff_alsa_open(), opt_input_file(), and vfw_read_packet().

#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 928 of file avformat.h.

Referenced by avformat_find_stream_info(), and read_frame_internal().

#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 933 of file avformat.h.

Referenced by avformat_open_input().

#define AVFMT_FLAG_SORT_DTS   0x10000

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

Definition at line 932 of file avformat.h.

Referenced by avi_read_header().

#define AVFMT_GENERIC_INDEX   0x0100

Use generic index building code.

Definition at line 345 of file avformat.h.

Referenced by parse_packet(), and read_frame_internal().

#define AVFMT_GLOBALHEADER   0x0040

Format wants global header.

Definition at line 343 of file avformat.h.

Referenced by add_audio_stream(), add_video_stream(), avformat_write_header(), and new_output_stream().

#define AVFMT_NEEDNUMBER   0x0002

Needs 'd' in filename.

Definition at line 339 of file avformat.h.

Referenced by avformat_open_input(), and opt_output_file().

#define AVFMT_NO_BYTE_SEEK   0x8000

Format does not allow seeking by bytes.

Definition at line 352 of file avformat.h.

Referenced by seek_frame_internal().

#define AVFMT_NOBINSEARCH   0x2000

Format does not allow to fallback to binary search via read_timestamp.

Definition at line 350 of file avformat.h.

#define AVFMT_NODIMENSIONS   0x0800

Format does not need width/height.

Definition at line 348 of file avformat.h.

Referenced by avformat_write_header().

#define AVFMT_NOFILE   0x0001

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

Definition at line 338 of file avformat.h.

Referenced by av_probe_input_format3(), avformat_close_input(), estimate_timings(), exit_program(), init_input(), main(), opt_output_file(), probe(), read_header(), seg_write_header(), and write_header().

#define AVFMT_NOGENSEARCH   0x4000

Format does not allow to fallback to generic search.

Definition at line 351 of file avformat.h.

#define AVFMT_NOSTREAMS   0x1000

Format does not require any streams.

Definition at line 349 of file avformat.h.

Referenced by avformat_write_header(), and transcode_init().

#define AVFMT_NOTIMESTAMPS   0x0080

Format does not need / have any timestamps.

Definition at line 344 of file avformat.h.

Referenced by av_interleaved_write_frame(), av_write_frame(), and do_video_out().

#define AVFMT_RAWPICTURE   0x0020

Format wants AVPicture structure for raw picture data.

Definition at line 341 of file avformat.h.

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

#define AVFMT_SEEK_TO_PTS   0x4000000

Seeking is based on PTS.

Definition at line 363 of file avformat.h.

#define AVFMT_SHOW_IDS   0x0008

Show format stream IDs numbers.

Definition at line 340 of file avformat.h.

Referenced by dump_stream_format(), and show_stream().

#define AVFMT_TS_DISCONT   0x0200

Format allows timestamp discontinuities.

Note, muxers always require valid (monotone) timestamps

Definition at line 346 of file avformat.h.

Referenced by read_thread(), and transcode().

#define AVFMT_TS_NONSTRICT   0x8020000

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

Definition at line 355 of file avformat.h.

Referenced by compute_pkt_fields2(), and write_frame().

#define AVFMT_VARIABLE_FPS   0x0400

Format allows variable fps.

Definition at line 347 of file avformat.h.

Referenced by do_video_out(), and transcode_init().

#define AVFMTCTX_NOHEADER   0x0001

#define AVINDEX_KEYFRAME   0x0001

#define AVPROBE_PADDING_SIZE   32

extra allocated bytes at the end of the probe buffer

Definition at line 335 of file avformat.h.

Referenced by av_probe_input_buffer(), ff_read_packet(), and main().

#define AVPROBE_SCORE_MAX   100

maximum score, half of that is used for file-extension-based detection

Definition at line 334 of file avformat.h.

Referenced by ac3_eac3_probe(), adts_aac_probe(), aea_read_probe(), aiff_probe(), amr_probe(), apc_probe(), ape_probe(), asf_probe(), au_probe(), av_probe_input_buffer(), av_probe_input_format3(), avi_probe(), bfi_probe(), cavsvideo_probe(), cdata_probe(), cin_probe(), dfa_probe(), dirac_probe(), dnxhd_probe(), dts_probe(), dv_probe(), dxa_probe(), ea_probe(), ff_read_packet(), ffm_probe(), film_probe(), flac_probe(), flic_probe(), flv_probe(), fourxm_probe(), gxf_probe(), h264_probe(), hls_probe(), idcin_probe(), iff_probe(), ipmovie_probe(), iss_probe(), jacosub_probe(), lmlm4_probe(), loas_probe(), lxf_probe(), matroska_probe(), microdvd_probe(), mmf_probe(), mov_probe(), mp3_read_probe(), mpc8_probe(), mpc_probe(), mpeg4video_probe(), mpegps_probe(), mpegts_probe(), mpegvideo_probe(), msnwc_tcp_probe(), mtv_probe(), mxf_probe(), nc_probe(), nsv_probe(), nut_probe(), nuv_probe(), ogg_probe(), oma_read_probe(), pmp_probe(), probe(), pva_probe(), qcp_probe(), r3d_probe(), read_gab2_sub(), read_probe(), rl2_probe(), rm_probe(), roq_probe(), rpl_probe(), rtsp_probe(), sap_probe(), sbg_read_probe(), seq_probe(), siff_probe(), smacker_probe(), smjpeg_probe(), sol_probe(), sox_probe(), spdif_probe(), srt_probe(), swf_probe(), thp_probe(), tmv_probe(), txd_probe(), vc1t_probe(), vid_probe(), vmd_probe(), voc_probe(), vqf_probe(), wc3_probe(), wsaud_probe(), wsvqa_probe(), wv_probe(), xa_probe(), xmv_probe(), xwma_probe(), yop_probe(), and yuv4_probe().

#define AVSEEK_FLAG_ANY   4

#define AVSEEK_FLAG_BACKWARD   1

#define AVSEEK_FLAG_BYTE   2

#define AVSEEK_FLAG_FRAME   8

seeking based on frame number

Definition at line 1572 of file avformat.h.

Referenced by read_seek(), and read_seek2().

#define FF_FDEBUG_TS   0x0001

Definition at line 1031 of file avformat.h.

Referenced by read_frame_internal().

#define MAX_PROBE_PACKETS   2500

Number of packets to buffer for codec probing.

Definition at line 759 of file avformat.h.

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

#define MAX_REORDER_DELAY   16

#define MAX_STD_TIMEBASES   (60*12+5)

Stream information used internally by av_find_stream_info().

Definition at line 729 of file avformat.h.

#define RAW_PACKET_BUFFER_SIZE   2500000

Remaining size available for raw_packet_buffer, in bytes.

Definition at line 1098 of file avformat.h.

Referenced by avformat_open_input(), ff_store_parser_state(), and flush_packet_queue().


Enumeration Type Documentation

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 generation for raw

Definition at line 571 of file avformat.h.


Function Documentation

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:
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 322 of file utils.c.

Referenced by dfa_read_packet(), ea_read_packet(), read_packet(), wc3_read_header(), wc3_read_packet(), and wv_read_packet().

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:
pkt packet
size desired payload size
Returns:
>0 (read size) if OK, AVERROR_xxx otherwise

Definition at line 298 of file utils.c.

Referenced by adx_read_packet(), aea_read_packet(), aiff_read_packet(), apc_read_packet(), asf_read_header(), au_read_packet(), av_append_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), daud_packet(), dfa_read_packet(), dxa_read_packet(), ea_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), ff_voc_get_packet(), film_read_packet(), flv_read_packet(), fourxm_read_packet(), g729_read_packet(), gsm_read_packet(), gxf_packet(), idcin_read_packet(), iff_read_packet(), ingenient_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_packet(), mmf_read_packet(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), msnwc_tcp_read_packet(), mtv_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(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rso_read_packet(), seq_read_packet(), siff_read_packet(), smjpeg_read_packet(), sol_read_packet(), sox_read_packet(), swf_read_packet(), thp_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vc1t_read_packet(), vid_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().

attribute_deprecated AVStream* av_new_stream ( AVFormatContext s,
int  id 
)

Add a new stream to a media file.

Can only be called in the read_header() function. If the flag AVFMTCTX_NOHEADER is in the format context, then new streams can be added in read_packet too.

Parameters:
s media file handle
id file-format-dependent stream ID

Definition at line 2932 of file utils.c.

attribute_deprecated void av_set_pts_info ( AVStream s,
int  pts_wrap_bits,
unsigned int  pts_num,
unsigned int  pts_den 
)

Deprecated:
this function is not supposed to be called outside of lavf

Definition at line 4124 of file utils.c.

attribute_deprecated AVFormatContext* avformat_alloc_output_context ( const char *  format,
AVOutputFormat oformat,
const char *  filename 
)

Deprecated:
deprecated in favor of avformat_alloc_output_context2()

Definition at line 3096 of file utils.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

Definition at line 3042 of file utils.c.

Referenced by avformat_alloc_output_context(), main(), and opt_output_file().


Generated on Fri Oct 26 02:48:01 2012 for FFmpeg by  doxygen 1.5.8