Miam-Player  0.8.0
A nice music player
avformat.h File Reference
#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.

Classes

struct  AVProbeData
 
struct  AVOutputFormat
 
struct  AVInputFormat
 
struct  AVIndexEntry
 
struct  AVStream
 
struct  AVProgram
 
struct  AVChapter
 
struct  AVFormatContext
 
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 More...
 
#define AVPROBE_SCORE_MIME   75
 score for file mime type More...
 
#define AVPROBE_SCORE_MAX   100
 maximum score More...
 
#define AVPROBE_PADDING_SIZE   32
 extra allocated bytes at the end of the probe buffer More...
 
#define AVFMT_NOFILE   0x0001
 Demuxer will use avio_open, no opened file should be provided by the caller. More...
 
#define AVFMT_NEEDNUMBER   0x0002
 
#define AVFMT_SHOW_IDS   0x0008
 
#define AVFMT_GLOBALHEADER   0x0040
 
#define AVFMT_NOTIMESTAMPS   0x0080
 
#define AVFMT_GENERIC_INDEX   0x0100
 
#define AVFMT_TS_DISCONT   0x0200
 
#define AVFMT_VARIABLE_FPS   0x0400
 
#define AVFMT_NODIMENSIONS   0x0800
 
#define AVFMT_NOSTREAMS   0x1000
 
#define AVFMT_NOBINSEARCH   0x2000
 
#define AVFMT_NOGENSEARCH   0x4000
 
#define AVFMT_NO_BYTE_SEEK   0x8000
 
#define AVFMT_ALLOW_FLUSH   0x10000
 
#define AVFMT_TS_NONSTRICT   0x20000
 
#define AVFMT_TS_NEGATIVE   0x40000
 
#define AVFMT_SEEK_TO_PTS   0x4000000
 
#define AVINDEX_KEYFRAME   0x0001
 
#define AVINDEX_DISCARD_FRAME
 
#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
 
#define AV_DISPOSITION_HEARING_IMPAIRED   0x0080
 
#define AV_DISPOSITION_VISUAL_IMPAIRED   0x0100
 
#define AV_DISPOSITION_CLEAN_EFFECTS   0x0200
 
#define AV_DISPOSITION_ATTACHED_PIC   0x0400
 
#define AV_DISPOSITION_TIMED_THUMBNAILS   0x0800
 
#define AV_DISPOSITION_CAPTIONS   0x10000
 
#define AV_DISPOSITION_DESCRIPTIONS   0x20000
 
#define AV_DISPOSITION_METADATA   0x40000
 
#define AV_PTS_WRAP_IGNORE   0
 ignore the wrap More...
 
#define AV_PTS_WRAP_ADD_OFFSET   1
 add the format specific offset on wrap detection More...
 
#define AV_PTS_WRAP_SUB_OFFSET   -1
 subtract the format specific offset on wrap detection More...
 
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED   0x0001
 The call resulted in updated metadata. More...
 
#define MAX_STD_TIMEBASES   (30*12+30+3+6)
 
#define MAX_REORDER_DELAY   16
 
#define AV_PROGRAM_RUNNING   1
 
#define AVFMTCTX_NOHEADER   0x0001
 
#define AVFMT_FLAG_GENPTS   0x0001
 Generate missing pts even if it requires parsing future frames. More...
 
#define AVFMT_FLAG_IGNIDX   0x0002
 Ignore index. More...
 
#define AVFMT_FLAG_NONBLOCK   0x0004
 Do not block when reading packets from input. More...
 
#define AVFMT_FLAG_IGNDTS   0x0008
 Ignore DTS on frames that contain both DTS & PTS. More...
 
#define AVFMT_FLAG_NOFILLIN   0x0010
 Do not infer any values from other values, just return what is stored in the container. More...
 
#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. More...
 
#define AVFMT_FLAG_NOBUFFER   0x0040
 Do not buffer frames when possible. More...
 
#define AVFMT_FLAG_CUSTOM_IO   0x0080
 The caller has supplied a custom AVIOContext, don't avio_close() it. More...
 
#define AVFMT_FLAG_DISCARD_CORRUPT   0x0100
 Discard frames marked corrupted. More...
 
#define AVFMT_FLAG_FLUSH_PACKETS   0x0200
 Flush the AVIOContext every packet. More...
 
#define AVFMT_FLAG_BITEXACT   0x0400
 
#define AVFMT_FLAG_MP4A_LATM   0x8000
 Enable RTP MP4A-LATM payload. More...
 
#define AVFMT_FLAG_SORT_DTS   0x10000
 try to interleave outputted packets by dts (using this flag can slow demuxing down) More...
 
#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) More...
 
#define AVFMT_FLAG_KEEP_SIDE_DATA   0x40000
 Don't merge side data but keep it separate. More...
 
#define AVFMT_FLAG_FAST_SEEK   0x80000
 Enable fast, but inaccurate seeks for some formats. More...
 
#define AVFMT_FLAG_SHORTEST   0x100000
 Stop muxing when the shortest stream stops. More...
 
#define AVFMT_FLAG_AUTO_BSF   0x200000
 Wait for packet data before writing a header, and add bitstream filters as requested by the muxer. More...
 
#define FF_FDEBUG_TS   0x0001
 
#define AVFMT_EVENT_FLAG_METADATA_UPDATED   0x0001
 The call resulted in updated metadata. More...
 
#define AVFMT_AVOID_NEG_TS_AUTO   -1
 Enabled when required by target format. More...
 
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE   1
 Shift timestamps so they are non negative. More...
 
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO   2
 Shift timestamps so that they start at 0. More...
 
#define AVSEEK_FLAG_BACKWARD   1
 seek backward More...
 
#define AVSEEK_FLAG_BYTE   2
 seeking based on position in bytes More...
 
#define AVSEEK_FLAG_ANY   4
 seek to any frame, even non-keyframes More...
 
#define AVSEEK_FLAG_FRAME   8
 seeking based on frame number More...
 
#define AVSTREAM_INIT_IN_WRITE_HEADER   0
 stream parameters initialized in avformat_write_header More...
 
#define AVSTREAM_INIT_IN_INIT_OUTPUT   1
 stream parameters initialized in avformat_init_output More...
 
#define AV_FRAME_FILENAME_FLAGS_MULTIPLE   1
 Allow multiple d. More...
 

Typedefs

typedef struct AVProbeData AVProbeData
 
typedef struct AVOutputFormat AVOutputFormat
 
typedef struct AVInputFormat AVInputFormat
 
typedef struct AVIndexEntry AVIndexEntry
 
typedef struct AVStreamInternal AVStreamInternal
 
typedef struct AVStream AVStream
 
typedef struct AVProgram AVProgram
 
typedef struct AVChapter AVChapter
 
typedef int(* av_format_control_message) (struct AVFormatContext *s, int type, void *data, size_t data_size)
 
typedef int(* AVOpenCallback) (struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
 
typedef struct AVFormatInternal AVFormatInternal
 
typedef struct AVFormatContext AVFormatContext
 
typedef struct AVPacketList AVPacketList
 

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 }
 
enum  AVTimebaseSource { AVFMT_TBCF_AUTO = -1, AVFMT_TBCF_DECODER, AVFMT_TBCF_DEMUXER }
 

Functions

int av_get_packet (AVIOContext *s, AVPacket *pkt, int size)
 
int av_append_packet (AVIOContext *s, AVPacket *pkt, int size)
 
AVRational av_stream_get_r_frame_rate (const AVStream *s)
 
void av_stream_set_r_frame_rate (AVStream *s, AVRational r)
 
struct AVCodecParserContextav_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)
 
int av_format_get_probe_score (const AVFormatContext *s)
 
AVCodecav_format_get_video_codec (const AVFormatContext *s)
 
void av_format_set_video_codec (AVFormatContext *s, AVCodec *c)
 
AVCodecav_format_get_audio_codec (const AVFormatContext *s)
 
void av_format_set_audio_codec (AVFormatContext *s, AVCodec *c)
 
AVCodecav_format_get_subtitle_codec (const AVFormatContext *s)
 
void av_format_set_subtitle_codec (AVFormatContext *s, AVCodec *c)
 
AVCodecav_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)
 
enum AVDurationEstimationMethod av_fmt_ctx_get_duration_estimation_method (const AVFormatContext *ctx)
 
unsigned avformat_version (void)
 
const char * avformat_configuration (void)
 
const char * avformat_license (void)
 
void av_register_all (void)
 
void av_register_input_format (AVInputFormat *format)
 
void av_register_output_format (AVOutputFormat *format)
 
int avformat_network_init (void)
 
int avformat_network_deinit (void)
 
AVInputFormatav_iformat_next (const AVInputFormat *f)
 
AVOutputFormatav_oformat_next (const AVOutputFormat *f)
 
AVFormatContextavformat_alloc_context (void)
 
void avformat_free_context (AVFormatContext *s)
 
const AVClassavformat_get_class (void)
 
AVStreamavformat_new_stream (AVFormatContext *s, const AVCodec *c)
 
uint8_t * av_stream_new_side_data (AVStream *stream, enum AVPacketSideDataType type, int size)
 
uint8_t * av_stream_get_side_data (const AVStream *stream, enum AVPacketSideDataType type, int *size)
 
AVProgramav_new_program (AVFormatContext *s, int id)
 
int avformat_alloc_output_context2 (AVFormatContext **ctx, AVOutputFormat *oformat, const char *format_name, const char *filename)
 
AVInputFormatav_find_input_format (const char *short_name)
 
AVInputFormatav_probe_input_format (AVProbeData *pd, int is_opened)
 
AVInputFormatav_probe_input_format2 (AVProbeData *pd, int is_opened, int *score_max)
 
AVInputFormatav_probe_input_format3 (AVProbeData *pd, int is_opened, int *score_ret)
 
int av_probe_input_buffer2 (AVIOContext *pb, AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
 
int av_probe_input_buffer (AVIOContext *pb, AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size)
 
int avformat_open_input (AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)
 
attribute_deprecated int av_demuxer_open (AVFormatContext *ic)
 
int avformat_find_stream_info (AVFormatContext *ic, AVDictionary **options)
 
AVProgramav_find_program_from_stream (AVFormatContext *ic, AVProgram *last, int s)
 
void av_program_add_stream_index (AVFormatContext *ac, int progid, unsigned int idx)
 
int av_find_best_stream (AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)
 
int av_read_frame (AVFormatContext *s, AVPacket *pkt)
 
int av_seek_frame (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
 
int avformat_seek_file (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
 
int avformat_flush (AVFormatContext *s)
 
int av_read_play (AVFormatContext *s)
 
int av_read_pause (AVFormatContext *s)
 
void avformat_close_input (AVFormatContext **s)
 
av_warn_unused_result int avformat_write_header (AVFormatContext *s, AVDictionary **options)
 
av_warn_unused_result int avformat_init_output (AVFormatContext *s, AVDictionary **options)
 
int av_write_frame (AVFormatContext *s, AVPacket *pkt)
 
int av_interleaved_write_frame (AVFormatContext *s, AVPacket *pkt)
 
int av_write_uncoded_frame (AVFormatContext *s, int stream_index, AVFrame *frame)
 
int av_interleaved_write_uncoded_frame (AVFormatContext *s, int stream_index, AVFrame *frame)
 
int av_write_uncoded_frame_query (AVFormatContext *s, int stream_index)
 
int av_write_trailer (AVFormatContext *s)
 
AVOutputFormatav_guess_format (const char *short_name, const char *filename, const char *mime_type)
 
enum AVCodecID av_guess_codec (AVOutputFormat *fmt, const char *short_name, const char *filename, const char *mime_type, enum AVMediaType type)
 
int av_get_output_timestamp (struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall)
 
void av_hex_dump (FILE *f, const uint8_t *buf, int size)
 
void av_hex_dump_log (void *avcl, int level, const uint8_t *buf, int size)
 
void av_pkt_dump2 (FILE *f, const AVPacket *pkt, int dump_payload, const AVStream *st)
 
void av_pkt_dump_log2 (void *avcl, int level, const AVPacket *pkt, int dump_payload, const AVStream *st)
 
enum AVCodecID av_codec_get_id (const struct AVCodecTag *const *tags, unsigned int tag)
 
unsigned int av_codec_get_tag (const struct AVCodecTag *const *tags, enum AVCodecID id)
 
int av_codec_get_tag2 (const struct AVCodecTag *const *tags, enum AVCodecID id, unsigned int *tag)
 
int av_find_default_stream_index (AVFormatContext *s)
 
int av_index_search_timestamp (AVStream *st, int64_t timestamp, int flags)
 
int av_add_index_entry (AVStream *st, int64_t pos, int64_t timestamp, int size, int distance, int flags)
 
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)
 
void av_dump_format (AVFormatContext *ic, int index, const char *url, int is_output)
 
int av_get_frame_filename2 (char *buf, int buf_size, const char *path, int number, int flags)
 
int av_get_frame_filename (char *buf, int buf_size, const char *path, int number)
 
int av_filename_number_test (const char *filename)
 
int av_sdp_create (AVFormatContext *ac[], int n_files, char *buf, int size)
 
int av_match_ext (const char *filename, const char *extensions)
 
int avformat_query_codec (const AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance)
 
const struct AVCodecTag * avformat_get_riff_video_tags (void)
 
const struct AVCodecTag * avformat_get_riff_audio_tags (void)
 
const struct AVCodecTag * avformat_get_mov_video_tags (void)
 
const struct AVCodecTag * avformat_get_mov_audio_tags (void)
 
AVRational av_guess_sample_aspect_ratio (AVFormatContext *format, AVStream *stream, AVFrame *frame)
 
AVRational av_guess_frame_rate (AVFormatContext *ctx, AVStream *stream, AVFrame *frame)
 
int avformat_match_stream_specifier (AVFormatContext *s, AVStream *st, const char *spec)
 
int avformat_queue_attached_pictures (AVFormatContext *s)
 
int avformat_transfer_internal_stream_timing_info (const AVOutputFormat *ofmt, AVStream *ost, const AVStream *ist, enum AVTimebaseSource copy_tb)
 
AVRational av_stream_get_codec_timebase (const AVStream *st)
 

Detailed Description

Main libavformat public API header

Macro Definition 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 first (usually only) 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.

#define AV_DISPOSITION_CAPTIONS   0x10000

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

#define AV_DISPOSITION_CLEAN_EFFECTS   0x0200

stream without voice

#define AV_DISPOSITION_COMMENT   0x0008
#define AV_DISPOSITION_DEFAULT   0x0001
#define AV_DISPOSITION_DESCRIPTIONS   0x20000
#define AV_DISPOSITION_DUB   0x0002
#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.

#define AV_DISPOSITION_HEARING_IMPAIRED   0x0080

stream for hearing impaired audiences

#define AV_DISPOSITION_KARAOKE   0x0020
#define AV_DISPOSITION_LYRICS   0x0010
#define AV_DISPOSITION_METADATA   0x40000
#define AV_DISPOSITION_ORIGINAL   0x0004
#define AV_DISPOSITION_TIMED_THUMBNAILS   0x0800

The stream is sparse, and contains thumbnail images, often corresponding to chapter markers. Only ever used with AV_DISPOSITION_ATTACHED_PIC.

#define AV_DISPOSITION_VISUAL_IMPAIRED   0x0100

stream for visual impaired audiences

#define AV_PROGRAM_RUNNING   1
#define AV_PTS_WRAP_ADD_OFFSET   1

add the format specific offset on wrap detection

#define AV_PTS_WRAP_IGNORE   0

ignore the wrap

Options for behavior on timestamp wrap detection.

#define AV_PTS_WRAP_SUB_OFFSET   -1

subtract the format specific offset on wrap detection

#define AVFMT_ALLOW_FLUSH   0x10000

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

#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 AVFMT_EVENT_FLAG_METADATA_UPDATED   0x0001

The call resulted in updated metadata.

#define AVFMT_FLAG_AUTO_BSF   0x200000

Wait for packet data before writing a header, and add bitstream filters as requested by the muxer.

#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.

#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_FAST_SEEK   0x80000

Enable fast, but inaccurate seeks for some formats.

#define AVFMT_FLAG_FLUSH_PACKETS   0x0200

Flush the AVIOContext every packet.

#define AVFMT_FLAG_GENPTS   0x0001

Generate missing pts even if it requires parsing future frames.

#define AVFMT_FLAG_IGNDTS   0x0008

Ignore DTS on frames that contain both DTS & PTS.

#define AVFMT_FLAG_IGNIDX   0x0002

Ignore index.

#define AVFMT_FLAG_KEEP_SIDE_DATA   0x40000

Don't merge side data but keep it separate.

#define AVFMT_FLAG_MP4A_LATM   0x8000

Enable RTP MP4A-LATM payload.

#define AVFMT_FLAG_NOBUFFER   0x0040

Do not buffer frames when possible.

#define AVFMT_FLAG_NOFILLIN   0x0010

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

#define AVFMT_FLAG_NONBLOCK   0x0004

Do not block when reading packets from input.

#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_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_SHORTEST   0x100000

Stop muxing when the shortest stream stops.

#define AVFMT_FLAG_SORT_DTS   0x10000

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

#define AVFMT_GENERIC_INDEX   0x0100

Use generic index building code.

#define AVFMT_GLOBALHEADER   0x0040

Format wants global header.

#define AVFMT_NEEDNUMBER   0x0002

Needs 'd' in filename.

#define AVFMT_NO_BYTE_SEEK   0x8000

Format does not allow seeking by bytes

#define AVFMT_NOBINSEARCH   0x2000

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

#define AVFMT_NODIMENSIONS   0x0800

Format does not need width/height

#define AVFMT_NOFILE   0x0001

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

#define AVFMT_NOGENSEARCH   0x4000

Format does not allow to fall back on generic search

#define AVFMT_NOSTREAMS   0x1000

Format does not require any streams

#define AVFMT_NOTIMESTAMPS   0x0080

Format does not need / have any timestamps.

#define AVFMT_SEEK_TO_PTS   0x4000000

Seeking is based on PTS

#define AVFMT_SHOW_IDS   0x0008

Show format stream IDs numbers.

#define AVFMT_TS_DISCONT   0x0200

Format allows timestamp discontinuities. Note, muxers always require valid (monotone) timestamps

#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

#define AVFMT_TS_NONSTRICT   0x20000

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

#define AVFMT_VARIABLE_FPS   0x0400

Format allows variable fps.

#define AVFMTCTX_NOHEADER   0x0001

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

#define AVINDEX_DISCARD_FRAME
Value:
0x0002
#define AVINDEX_KEYFRAME   0x0001
#define AVPROBE_PADDING_SIZE   32

extra allocated bytes at the end of the probe buffer

#define AVPROBE_SCORE_EXTENSION   50

score for file extension

#define AVPROBE_SCORE_MAX   100

maximum score

#define AVPROBE_SCORE_MIME   75

score for file mime type

#define AVPROBE_SCORE_RETRY   (AVPROBE_SCORE_MAX/4)
#define AVPROBE_SCORE_STREAM_RETRY   (AVPROBE_SCORE_MAX/4-1)
#define AVSEEK_FLAG_ANY   4

seek to any frame, even non-keyframes

#define AVSEEK_FLAG_BACKWARD   1

seek backward

#define AVSEEK_FLAG_BYTE   2

seeking based on position in bytes

#define AVSEEK_FLAG_FRAME   8

seeking based on frame number

#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED   0x0001

The call resulted in updated metadata.

#define FF_FDEBUG_TS   0x0001
#define MAX_REORDER_DELAY   16
#define MAX_STD_TIMEBASES   (30*12+30+3+6)

Stream information used internally by av_find_stream_info()

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.

typedef struct AVChapter AVChapter

Format I/O context. New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. sizeof(AVFormatContext) must not be used outside libav*, use avformat_alloc_context() to create an AVFormatContext.

Fields can be accessed through AVOptions (av_opt*), the name string used matches the associated command line parameter name and can be found in libavformat/options_table.h. The AVOption/command line parameter names differ in some cases from the C structure field names for historic reasons or brevity.

typedef struct AVIndexEntry AVIndexEntry
typedef int(* AVOpenCallback) (struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options)
typedef struct AVPacketList AVPacketList
typedef struct AVProbeData AVProbeData

This structure contains the data a format has to probe a file.

typedef struct AVProgram AVProgram

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(AVProgram) must not be used outside libav*.

typedef struct AVStream AVStream

Stream structure. New fields can be added to the end with minor version bumps. Removal, reordering and changes to existing fields require a major version bump. sizeof(AVStream) must not be used outside libav*.

Enumeration Type Documentation

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)

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

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
sassociated IO context
pktpacket
sizeamount of data to read
Returns
>0 (read size) if OK, AVERROR_xxx otherwise, previous data will not be lost even if an error occurs.
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.
AVCodec* av_format_get_audio_codec ( const AVFormatContext s)
av_format_control_message av_format_get_control_message_cb ( const AVFormatContext s)
AVCodec* av_format_get_data_codec ( const AVFormatContext s)
int av_format_get_metadata_header_padding ( const AVFormatContext s)
void* av_format_get_opaque ( const AVFormatContext s)
int av_format_get_probe_score ( const AVFormatContext s)
AVCodec* av_format_get_subtitle_codec ( const AVFormatContext s)
AVCodec* av_format_get_video_codec ( const AVFormatContext s)
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.

void av_format_set_audio_codec ( AVFormatContext s,
AVCodec c 
)
void av_format_set_control_message_cb ( AVFormatContext s,
av_format_control_message  callback 
)
void av_format_set_data_codec ( AVFormatContext s,
AVCodec c 
)
void av_format_set_metadata_header_padding ( AVFormatContext s,
int  c 
)
void av_format_set_opaque ( AVFormatContext s,
void *  opaque 
)
void av_format_set_subtitle_codec ( AVFormatContext s,
AVCodec c 
)
void av_format_set_video_codec ( AVFormatContext s,
AVCodec c 
)
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
sassociated IO context
pktpacket
sizedesired payload size
Returns
>0 (read size) if OK, AVERROR_xxx otherwise
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.

struct AVCodecParserContext* av_stream_get_parser ( const AVStream s)
AVRational av_stream_get_r_frame_rate ( const AVStream s)
char* av_stream_get_recommended_encoder_configuration ( const AVStream s)
void av_stream_set_r_frame_rate ( AVStream s,
AVRational  r 
)
void av_stream_set_recommended_encoder_configuration ( AVStream s,
char *  configuration 
)
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
*ctxis set to the created format context, or to NULL in case of failure
oformatformat to use for allocating the context, if NULL format_name and filename are used instead
format_namethe name of output format to use for allocating the context, if NULL filename is used instead
filenamethe 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