FFmpeg
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#include <stdio.h>
#include "libavcodec/codec_par.h"
#include "libavcodec/defs.h"
#include "libavcodec/packet.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "avio.h"
#include "libavformat/version_major.h"
Go to the source code of this file.
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 | AVStreamGroupTileGrid |
AVStreamGroupTileGrid holds information on how to combine several independent images on a single canvas for presentation. More... | |
struct | AVStreamGroup |
struct | AVProgram |
New fields can be added to the end with minor version bumps. More... | |
struct | AVChapter |
struct | AVFormatContext |
Format I/O context. More... | |
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 |
Needs 'd' in filename. More... | |
#define | AVFMT_EXPERIMENTAL 0x0004 |
The muxer/demuxer is experimental and should be used with caution. More... | |
#define | AVFMT_SHOW_IDS 0x0008 |
Show format stream IDs numbers. More... | |
#define | AVFMT_GLOBALHEADER 0x0040 |
Format wants global header. More... | |
#define | AVFMT_NOTIMESTAMPS 0x0080 |
Format does not need / have any timestamps. More... | |
#define | AVFMT_GENERIC_INDEX 0x0100 |
Use generic index building code. More... | |
#define | AVFMT_TS_DISCONT 0x0200 |
Format allows timestamp discontinuities. More... | |
#define | AVFMT_VARIABLE_FPS 0x0400 |
Format allows variable fps. More... | |
#define | AVFMT_NODIMENSIONS 0x0800 |
Format does not need width/height. More... | |
#define | AVFMT_NOSTREAMS 0x1000 |
Format does not require any streams. More... | |
#define | AVFMT_NOBINSEARCH 0x2000 |
Format does not allow to fall back on binary search via read_timestamp. More... | |
#define | AVFMT_NOGENSEARCH 0x4000 |
Format does not allow to fall back on generic search. More... | |
#define | AVFMT_NO_BYTE_SEEK 0x8000 |
Format does not allow seeking by bytes. More... | |
#define | AVFMT_TS_NONSTRICT 0x20000 |
Format does not require strictly increasing timestamps, but they must still be monotonic. More... | |
#define | AVFMT_TS_NEGATIVE 0x40000 |
Format allows muxing negative timestamps. More... | |
#define | AVFMT_SEEK_TO_PTS 0x4000000 |
Seeking is based on PTS. More... | |
#define | AVINDEX_KEYFRAME 0x0001 |
#define | AVINDEX_DISCARD_FRAME |
#define | AV_DISPOSITION_DEFAULT (1 << 0) |
The stream should be chosen by default among other streams of the same type, unless the user has explicitly specified otherwise. More... | |
#define | AV_DISPOSITION_DUB (1 << 1) |
The stream is not in original language. More... | |
#define | AV_DISPOSITION_ORIGINAL (1 << 2) |
The stream is in original language. More... | |
#define | AV_DISPOSITION_COMMENT (1 << 3) |
The stream is a commentary track. More... | |
#define | AV_DISPOSITION_LYRICS (1 << 4) |
The stream contains song lyrics. More... | |
#define | AV_DISPOSITION_KARAOKE (1 << 5) |
The stream contains karaoke audio. More... | |
#define | AV_DISPOSITION_FORCED (1 << 6) |
Track should be used during playback by default. More... | |
#define | AV_DISPOSITION_HEARING_IMPAIRED (1 << 7) |
The stream is intended for hearing impaired audiences. More... | |
#define | AV_DISPOSITION_VISUAL_IMPAIRED (1 << 8) |
The stream is intended for visually impaired audiences. More... | |
#define | AV_DISPOSITION_CLEAN_EFFECTS (1 << 9) |
The audio stream contains music and sound effects without voice. More... | |
#define | AV_DISPOSITION_ATTACHED_PIC (1 << 10) |
The stream is stored in the file as an attached picture/"cover art" (e.g. More... | |
#define | AV_DISPOSITION_TIMED_THUMBNAILS (1 << 11) |
The stream is sparse, and contains thumbnail images, often corresponding to chapter markers. More... | |
#define | AV_DISPOSITION_NON_DIEGETIC (1 << 12) |
The stream is intended to be mixed with a spatial audio track. More... | |
#define | AV_DISPOSITION_CAPTIONS (1 << 16) |
The subtitle stream contains captions, providing a transcription and possibly a translation of audio. More... | |
#define | AV_DISPOSITION_DESCRIPTIONS (1 << 17) |
The subtitle stream contains a textual description of the video content. More... | |
#define | AV_DISPOSITION_METADATA (1 << 18) |
The subtitle stream contains time-aligned metadata that is not intended to be directly presented to the user. More... | |
#define | AV_DISPOSITION_DEPENDENT (1 << 19) |
The stream is intended to be mixed with another stream before presentation. More... | |
#define | AV_DISPOSITION_STILL_IMAGE (1 << 20) |
The video stream contains still images. More... | |
#define | AV_PTS_WRAP_IGNORE 0 |
Options for behavior on timestamp wrap detection. 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 |
#define | AVSTREAM_EVENT_FLAG_NEW_PACKETS (1 << 1) |
#define | AV_PROGRAM_RUNNING 1 |
#define | AVFMTCTX_NOHEADER 0x0001 |
signal that no header is present (streams are added dynamically) More... | |
#define | AVFMTCTX_UNSEEKABLE 0x0002 |
signal that the stream is definitely not seekable, and attempts to call the seek function will fail. More... | |
#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 |
When muxing, try to avoid writing any random/volatile data to the output. 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_FAST_SEEK 0x80000 |
Enable fast, but inaccurate seeks for some formats. More... | |
#define | AVFMT_FLAG_AUTO_BSF 0x200000 |
Add bitstream filters as requested by the muxer. More... | |
#define | FF_FDEBUG_TS 0x0001 |
#define | AVFMT_EVENT_FLAG_METADATA_UPDATED 0x0001 |
#define | AVFMT_AVOID_NEG_TS_AUTO -1 |
Enabled when required by target format. More... | |
#define | AVFMT_AVOID_NEG_TS_DISABLED 0 |
Do not shift timestamps even when they are negative. 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 |
#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 int(* | av_format_control_message) (struct AVFormatContext *s, int type, void *data, size_t data_size) |
Callback used by devices to communicate with application. More... | |
typedef int(* | AVOpenCallback) (struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options) |
Enumerations | |
enum | AVStreamParseType { AVSTREAM_PARSE_NONE, AVSTREAM_PARSE_FULL, AVSTREAM_PARSE_HEADERS, AVSTREAM_PARSE_TIMESTAMPS, AVSTREAM_PARSE_FULL_ONCE, AVSTREAM_PARSE_FULL_RAW } |
enum | AVStreamGroupParamsType { AV_STREAM_GROUP_PARAMS_NONE, AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT, AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION, AV_STREAM_GROUP_PARAMS_TILE_GRID } |
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... | |
enum | AVTimebaseSource { AVFMT_TBCF_AUTO = -1, AVFMT_TBCF_DECODER, AVFMT_TBCF_DEMUXER } |
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. More... | |
int | av_append_packet (AVIOContext *s, AVPacket *pkt, int size) |
Read data and append it to the current content of the AVPacket. More... | |
int | av_disposition_from_string (const char *disp) |
const char * | av_disposition_to_string (int disposition) |
struct AVCodecParserContext * | av_stream_get_parser (const AVStream *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. More... | |
unsigned | avformat_version (void) |
Return the LIBAVFORMAT_VERSION_INT constant. More... | |
const char * | avformat_configuration (void) |
Return the libavformat build-time configuration. More... | |
const char * | avformat_license (void) |
Return the libavformat license. More... | |
int | avformat_network_init (void) |
Do global initialization of network libraries. More... | |
int | avformat_network_deinit (void) |
Undo the initialization done by avformat_network_init. More... | |
const AVOutputFormat * | av_muxer_iterate (void **opaque) |
Iterate over all registered muxers. More... | |
const AVInputFormat * | av_demuxer_iterate (void **opaque) |
Iterate over all registered demuxers. More... | |
AVFormatContext * | avformat_alloc_context (void) |
Allocate an AVFormatContext. More... | |
void | avformat_free_context (AVFormatContext *s) |
Free an AVFormatContext and all its streams. More... | |
const AVClass * | avformat_get_class (void) |
Get the AVClass for AVFormatContext. More... | |
const AVClass * | av_stream_get_class (void) |
Get the AVClass for AVStream. More... | |
const AVClass * | av_stream_group_get_class (void) |
Get the AVClass for AVStreamGroup. More... | |
const char * | avformat_stream_group_name (enum AVStreamGroupParamsType type) |
AVStreamGroup * | avformat_stream_group_create (AVFormatContext *s, enum AVStreamGroupParamsType type, AVDictionary **options) |
Add a new empty stream group to a media file. More... | |
AVStream * | avformat_new_stream (AVFormatContext *s, const struct AVCodec *c) |
Add a new stream to a media file. More... | |
int | avformat_stream_group_add_stream (AVStreamGroup *stg, AVStream *st) |
Add an already allocated stream to a stream group. More... | |
AVProgram * | av_new_program (AVFormatContext *s, int id) |
int | avformat_alloc_output_context2 (AVFormatContext **ctx, const AVOutputFormat *oformat, const char *format_name, const char *filename) |
Allocate an AVFormatContext for an output format. More... | |
const AVInputFormat * | av_find_input_format (const char *short_name) |
Find AVInputFormat based on the short name of the input format. More... | |
const AVInputFormat * | av_probe_input_format (const AVProbeData *pd, int is_opened) |
Guess the file format. More... | |
const AVInputFormat * | av_probe_input_format2 (const AVProbeData *pd, int is_opened, int *score_max) |
Guess the file format. More... | |
const AVInputFormat * | av_probe_input_format3 (const AVProbeData *pd, int is_opened, int *score_ret) |
Guess the file format. More... | |
int | av_probe_input_buffer2 (AVIOContext *pb, const AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size) |
Probe a bytestream to determine the input format. More... | |
int | av_probe_input_buffer (AVIOContext *pb, const AVInputFormat **fmt, const char *url, void *logctx, unsigned int offset, unsigned int max_probe_size) |
Like av_probe_input_buffer2() but returns 0 on success. More... | |
int | avformat_open_input (AVFormatContext **ps, const char *url, const AVInputFormat *fmt, AVDictionary **options) |
Open an input stream and read the header. More... | |
int | avformat_find_stream_info (AVFormatContext *ic, AVDictionary **options) |
Read packets of a media file to get stream information. More... | |
AVProgram * | av_find_program_from_stream (AVFormatContext *ic, AVProgram *last, int s) |
Find the programs which belong to a given stream. More... | |
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, const struct AVCodec **decoder_ret, int flags) |
Find the "best" stream in the file. More... | |
int | av_read_frame (AVFormatContext *s, AVPacket *pkt) |
Return the next frame of a stream. More... | |
int | av_seek_frame (AVFormatContext *s, int stream_index, int64_t timestamp, int flags) |
Seek to the keyframe at timestamp. More... | |
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. More... | |
int | avformat_flush (AVFormatContext *s) |
Discard all internally buffered data. More... | |
int | av_read_play (AVFormatContext *s) |
Start playing a network-based stream (e.g. More... | |
int | av_read_pause (AVFormatContext *s) |
Pause a network-based stream (e.g. More... | |
void | avformat_close_input (AVFormatContext **s) |
Close an opened input AVFormatContext. More... | |
av_warn_unused_result int | avformat_write_header (AVFormatContext *s, AVDictionary **options) |
Allocate the stream private data and write the stream header to an output media file. More... | |
av_warn_unused_result int | avformat_init_output (AVFormatContext *s, AVDictionary **options) |
Allocate the stream private data and initialize the codec, but do not write the header. More... | |
int | av_write_frame (AVFormatContext *s, AVPacket *pkt) |
Write a packet to an output media file. More... | |
int | av_interleaved_write_frame (AVFormatContext *s, AVPacket *pkt) |
Write a packet to an output media file ensuring correct interleaving. More... | |
int | av_write_uncoded_frame (AVFormatContext *s, int stream_index, struct AVFrame *frame) |
Write an uncoded frame to an output media file. More... | |
int | av_interleaved_write_uncoded_frame (AVFormatContext *s, int stream_index, struct AVFrame *frame) |
Write an uncoded frame to an output media file. More... | |
int | av_write_uncoded_frame_query (AVFormatContext *s, int stream_index) |
Test whether a muxer supports uncoded frame. More... | |
int | av_write_trailer (AVFormatContext *s) |
Write the stream trailer to an output media file and free the file private data. More... | |
const 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. More... | |
enum AVCodecID | av_guess_codec (const 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. More... | |
int | av_get_output_timestamp (struct AVFormatContext *s, int stream, int64_t *dts, int64_t *wall) |
Get timing information for the data currently output. More... | |
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. More... | |
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. More... | |
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. More... | |
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. More... | |
enum AVCodecID | av_codec_get_id (const struct AVCodecTag *const *tags, unsigned int tag) |
Get the AVCodecID for the given codec tag tag. More... | |
unsigned int | av_codec_get_tag (const struct AVCodecTag *const *tags, enum AVCodecID id) |
Get the codec tag for the given codec id id. More... | |
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. More... | |
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. More... | |
int | avformat_index_get_entries_count (const AVStream *st) |
Get the index entry count for the given AVStream. More... | |
const AVIndexEntry * | avformat_index_get_entry (AVStream *st, int idx) |
Get the AVIndexEntry corresponding to the given index. More... | |
const AVIndexEntry * | avformat_index_get_entry_from_timestamp (AVStream *st, int64_t wanted_timestamp, int flags) |
Get the AVIndexEntry corresponding to the given timestamp. More... | |
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. More... | |
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. More... | |
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. More... | |
int | av_get_frame_filename2 (char *buf, int buf_size, const char *path, int number, int flags) |
Return in 'buf' the path with 'd' replaced by a number. More... | |
int | av_get_frame_filename (char *buf, int buf_size, const char *path, int number) |
int | av_filename_number_test (const char *filename) |
Check whether filename actually is a numbered sequence generator. More... | |
int | av_sdp_create (AVFormatContext *ac[], int n_files, char *buf, int size) |
Generate an SDP for an RTP session. More... | |
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. More... | |
int | avformat_query_codec (const AVOutputFormat *ofmt, enum AVCodecID codec_id, int std_compliance) |
Test if the given container can store a codec. More... | |
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, struct AVFrame *frame) |
Guess the sample aspect ratio of a frame, based on both the stream and the frame aspect ratio. More... | |
AVRational | av_guess_frame_rate (AVFormatContext *ctx, AVStream *stream, struct AVFrame *frame) |
Guess the frame rate, based on both the container and codec information. More... | |
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. More... | |
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) |
Transfer internal timing information from one stream to another. More... | |
AVRational | av_stream_get_codec_timebase (const AVStream *st) |
Get the internal codec timebase from a stream. More... | |
Main libavformat public API header
Definition in file avformat.h.
#define AVPROBE_SCORE_RETRY (AVPROBE_SCORE_MAX/4) |
Definition at line 458 of file avformat.h.
#define AVPROBE_SCORE_STREAM_RETRY (AVPROBE_SCORE_MAX/4-1) |
Definition at line 459 of file avformat.h.
#define AVPROBE_SCORE_EXTENSION 50 |
score for file extension
Definition at line 461 of file avformat.h.
#define AVPROBE_SCORE_MIME 75 |
score for file mime type
Definition at line 462 of file avformat.h.
#define AVPROBE_SCORE_MAX 100 |
maximum score
Definition at line 463 of file avformat.h.
#define AVPROBE_PADDING_SIZE 32 |
extra allocated bytes at the end of the probe buffer
Definition at line 465 of file avformat.h.
#define AVFMT_NOFILE 0x0001 |
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition at line 468 of file avformat.h.
#define AVFMT_NEEDNUMBER 0x0002 |
Needs 'd' in filename.
Definition at line 469 of file avformat.h.
#define AVFMT_EXPERIMENTAL 0x0004 |
The muxer/demuxer is experimental and should be used with caution.
Definition at line 476 of file avformat.h.
#define AVFMT_SHOW_IDS 0x0008 |
Show format stream IDs numbers.
Definition at line 477 of file avformat.h.
#define AVFMT_GLOBALHEADER 0x0040 |
Format wants global header.
Definition at line 478 of file avformat.h.
#define AVFMT_NOTIMESTAMPS 0x0080 |
Format does not need / have any timestamps.
Definition at line 479 of file avformat.h.
#define AVFMT_GENERIC_INDEX 0x0100 |
Use generic index building code.
Definition at line 480 of file avformat.h.
#define AVFMT_TS_DISCONT 0x0200 |
Format allows timestamp discontinuities.
Note, muxers always require valid (monotone) timestamps
Definition at line 481 of file avformat.h.
#define AVFMT_VARIABLE_FPS 0x0400 |
Format allows variable fps.
Definition at line 482 of file avformat.h.
#define AVFMT_NODIMENSIONS 0x0800 |
Format does not need width/height.
Definition at line 483 of file avformat.h.
#define AVFMT_NOSTREAMS 0x1000 |
Format does not require any streams.
Definition at line 484 of file avformat.h.
#define AVFMT_NOBINSEARCH 0x2000 |
Format does not allow to fall back on binary search via read_timestamp.
Definition at line 485 of file avformat.h.
#define AVFMT_NOGENSEARCH 0x4000 |
Format does not allow to fall back on generic search.
Definition at line 486 of file avformat.h.
#define AVFMT_NO_BYTE_SEEK 0x8000 |
Format does not allow seeking by bytes.
Definition at line 487 of file avformat.h.
#define AVFMT_TS_NONSTRICT 0x20000 |
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition at line 491 of file avformat.h.
#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 494 of file avformat.h.
#define AVFMT_SEEK_TO_PTS 0x4000000 |
Seeking is based on PTS.
Definition at line 503 of file avformat.h.
#define AVINDEX_KEYFRAME 0x0001 |
Definition at line 610 of file avformat.h.
#define AVINDEX_DISCARD_FRAME |
Definition at line 611 of file avformat.h.
#define AV_DISPOSITION_DEFAULT (1 << 0) |
The stream should be chosen by default among other streams of the same type, unless the user has explicitly specified otherwise.
Definition at line 621 of file avformat.h.
#define AV_DISPOSITION_DUB (1 << 1) |
The stream is not in original language.
Definition at line 629 of file avformat.h.
#define AV_DISPOSITION_ORIGINAL (1 << 2) |
The stream is in original language.
Definition at line 635 of file avformat.h.
#define AV_DISPOSITION_COMMENT (1 << 3) |
The stream is a commentary track.
Definition at line 639 of file avformat.h.
#define AV_DISPOSITION_LYRICS (1 << 4) |
The stream contains song lyrics.
Definition at line 643 of file avformat.h.
#define AV_DISPOSITION_KARAOKE (1 << 5) |
The stream contains karaoke audio.
Definition at line 647 of file avformat.h.
#define AV_DISPOSITION_FORCED (1 << 6) |
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 654 of file avformat.h.
#define AV_DISPOSITION_HEARING_IMPAIRED (1 << 7) |
The stream is intended for hearing impaired audiences.
Definition at line 658 of file avformat.h.
#define AV_DISPOSITION_VISUAL_IMPAIRED (1 << 8) |
The stream is intended for visually impaired audiences.
Definition at line 662 of file avformat.h.
#define AV_DISPOSITION_CLEAN_EFFECTS (1 << 9) |
The audio stream contains music and sound effects without voice.
Definition at line 666 of file avformat.h.
#define AV_DISPOSITION_ATTACHED_PIC (1 << 10) |
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.
Definition at line 674 of file avformat.h.
#define AV_DISPOSITION_TIMED_THUMBNAILS (1 << 11) |
The stream is sparse, and contains thumbnail images, often corresponding to chapter markers.
Only ever used with AV_DISPOSITION_ATTACHED_PIC.
Definition at line 679 of file avformat.h.
#define AV_DISPOSITION_NON_DIEGETIC (1 << 12) |
The stream is intended to be mixed with a spatial audio track.
For example, it could be used for narration or stereo music, and may remain unchanged by listener head rotation.
Definition at line 686 of file avformat.h.
#define AV_DISPOSITION_CAPTIONS (1 << 16) |
The subtitle stream contains captions, providing a transcription and possibly a translation of audio.
Typically intended for hearing-impaired audiences.
Definition at line 692 of file avformat.h.
#define AV_DISPOSITION_DESCRIPTIONS (1 << 17) |
The subtitle stream contains a textual description of the video content.
Typically intended for visually-impaired audiences or for the cases where the video cannot be seen.
Definition at line 698 of file avformat.h.
#define AV_DISPOSITION_METADATA (1 << 18) |
The subtitle stream contains time-aligned metadata that is not intended to be directly presented to the user.
Definition at line 703 of file avformat.h.
#define AV_DISPOSITION_DEPENDENT (1 << 19) |
The stream is intended to be mixed with another stream before presentation.
Used for example to signal the stream contains an image part of a HEIF grid, or for mix_type=0 in mpegts.
Definition at line 709 of file avformat.h.
#define AV_DISPOSITION_STILL_IMAGE (1 << 20) |
The video stream contains still images.
Definition at line 713 of file avformat.h.
#define AV_PTS_WRAP_IGNORE 0 |
Options for behavior on timestamp wrap detection.
ignore the wrap
Definition at line 732 of file avformat.h.
#define AV_PTS_WRAP_ADD_OFFSET 1 |
add the format specific offset on wrap detection
Definition at line 733 of file avformat.h.
#define AV_PTS_WRAP_SUB_OFFSET -1 |
subtract the format specific offset on wrap detection
Definition at line 734 of file avformat.h.
#define AVSTREAM_EVENT_FLAG_METADATA_UPDATED 0x0001 |
Definition at line 893 of file avformat.h.
#define AVSTREAM_EVENT_FLAG_NEW_PACKETS (1 << 1) |
Definition at line 899 of file avformat.h.
#define AV_PROGRAM_RUNNING 1 |
Definition at line 1171 of file avformat.h.
#define AVFMTCTX_NOHEADER 0x0001 |
signal that no header is present (streams are added dynamically)
Definition at line 1206 of file avformat.h.
#define AVFMTCTX_UNSEEKABLE 0x0002 |
signal that the stream is definitely not seekable, and attempts to call the seek function will fail.
For some network protocols (e.g. HLS), this can change dynamically at runtime.
Definition at line 1208 of file avformat.h.
#define AVFMT_FLAG_GENPTS 0x0001 |
Generate missing pts even if it requires parsing future frames.
Definition at line 1407 of file avformat.h.
#define AVFMT_FLAG_IGNIDX 0x0002 |
Ignore index.
Definition at line 1408 of file avformat.h.
#define AVFMT_FLAG_NONBLOCK 0x0004 |
Do not block when reading packets from input.
Definition at line 1409 of file avformat.h.
#define AVFMT_FLAG_IGNDTS 0x0008 |
Ignore DTS on frames that contain both DTS & PTS.
Definition at line 1410 of file avformat.h.
#define AVFMT_FLAG_NOFILLIN 0x0010 |
Do not infer any values from other values, just return what is stored in the container.
Definition at line 1411 of file avformat.h.
#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 1412 of file avformat.h.
#define AVFMT_FLAG_NOBUFFER 0x0040 |
Do not buffer frames when possible.
Definition at line 1413 of file avformat.h.
#define AVFMT_FLAG_CUSTOM_IO 0x0080 |
The caller has supplied a custom AVIOContext, don't avio_close() it.
Definition at line 1414 of file avformat.h.
#define AVFMT_FLAG_DISCARD_CORRUPT 0x0100 |
Discard frames marked corrupted.
Definition at line 1415 of file avformat.h.
#define AVFMT_FLAG_FLUSH_PACKETS 0x0200 |
Flush the AVIOContext every packet.
Definition at line 1416 of file avformat.h.
#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 1423 of file avformat.h.
#define AVFMT_FLAG_SORT_DTS 0x10000 |
try to interleave outputted packets by dts (using this flag can slow demuxing down)
Definition at line 1424 of file avformat.h.
#define AVFMT_FLAG_FAST_SEEK 0x80000 |
Enable fast, but inaccurate seeks for some formats.
Definition at line 1425 of file avformat.h.
#define AVFMT_FLAG_AUTO_BSF 0x200000 |
Add bitstream filters as requested by the muxer.
Definition at line 1429 of file avformat.h.
#define FF_FDEBUG_TS 0x0001 |
Definition at line 1534 of file avformat.h.
#define AVFMT_EVENT_FLAG_METADATA_UPDATED 0x0001 |
Definition at line 1632 of file avformat.h.
#define AVFMT_AVOID_NEG_TS_AUTO -1 |
Enabled when required by target format.
Definition at line 1643 of file avformat.h.
#define AVFMT_AVOID_NEG_TS_DISABLED 0 |
Do not shift timestamps even when they are negative.
Definition at line 1644 of file avformat.h.
#define AVFMT_AVOID_NEG_TS_MAKE_NON_NEGATIVE 1 |
Shift timestamps so they are non negative.
Definition at line 1645 of file avformat.h.
#define AVFMT_AVOID_NEG_TS_MAKE_ZERO 2 |
Shift timestamps so that they start at 0.
Definition at line 1646 of file avformat.h.
#define AVSEEK_FLAG_BACKWARD 1 |
seek backward
Definition at line 2433 of file avformat.h.
#define AVSEEK_FLAG_BYTE 2 |
seeking based on position in bytes
Definition at line 2434 of file avformat.h.
#define AVSEEK_FLAG_ANY 4 |
seek to any frame, even non-keyframes
Definition at line 2435 of file avformat.h.
#define AVSEEK_FLAG_FRAME 8 |
seeking based on frame number
Definition at line 2436 of file avformat.h.
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 1225 of file avformat.h.
typedef int(* AVOpenCallback) (struct AVFormatContext *s, AVIOContext **pb, const char *url, int flags, const AVIOInterruptCB *int_cb, AVDictionary **options) |
Definition at line 1228 of file avformat.h.
enum AVStreamParseType |
Definition at line 591 of file avformat.h.
Enumerator | |
---|---|
AV_STREAM_GROUP_PARAMS_NONE | |
AV_STREAM_GROUP_PARAMS_IAMF_AUDIO_ELEMENT | |
AV_STREAM_GROUP_PARAMS_IAMF_MIX_PRESENTATION | |
AV_STREAM_GROUP_PARAMS_TILE_GRID |
Definition at line 1080 of file avformat.h.
The duration of a video can be estimated through various ways, and this enum can be used to know how the duration was estimated.
Definition at line 1235 of file avformat.h.
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.
s | associated IO context |
pkt | packet |
size | desired payload size |
Definition at line 103 of file utils.c.
Referenced by aa_read_packet(), aal_read_packet(), aax_read_packet(), ac4_read_packet(), ace_read_packet(), adp_read_packet(), ads_read_packet(), adts_aac_read_packet(), adx_read_packet(), aea_read_packet(), afc_read_packet(), aiff_read_packet(), aix_read_packet(), apc_read_packet(), aptx_hd_read_packet(), aptx_read_packet(), argo_brp_read_packet(), asf_read_header(), asf_read_subpayload(), ast_read_packet(), audio_frame_obu(), av_append_packet(), avi_read_packet(), bfi_read_packet(), cdata_read_packet(), cdxl_read_packet(), cin_read_packet(), cine_read_packet(), codec2_read_packet(), dat_read_packet(), daud_packet(), dcstr_read_packet(), dfa_read_packet(), dhav_read_packet(), dsf_read_packet(), dxa_read_packet(), ea_read_packet(), evc_read_packet(), ff_add_attached_pic(), 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(), fsb_read_packet(), g726_read_packet(), g729_read_packet(), gdv_read_packet(), genh_read_packet(), gsm_read_packet(), gxf_packet(), hca_read_packet(), hnm_read_packet(), idcin_read_packet(), iff_read_packet(), ifv_read_packet(), ilbc_read_packet(), ingenient_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_packet(), lvf_read_packet(), mmf_read_packet(), mods_read_packet(), mov_read_packet(), mp3_read_packet(), mpc8_read_packet(), mpegps_read_packet(), mpjpeg_read_packet(), msf_read_packet(), msnwc_tcp_read_packet(), msp_read_packet(), mtaf_read_packet(), mtv_read_packet(), musx_read_packet(), mv_read_packet(), mxf_decrypt_triplet(), mxf_get_d10_aes3_packet(), mxf_get_eia608_packet(), mxf_read_packet(), nc_read_packet(), nsv_read_chunk(), nuv_packet(), parse_chunk(), pdv_read_packet(), pmp_packet(), pp_bnk_read_packet(), pva_read_packet(), qcp_read_packet(), r3d_read_reda(), r3d_read_redv(), raw_read_packet(), rawvideo_read_packet(), read_dst_frame(), read_packet(), redspark_read_packet(), rka_read_packet(), rl2_read_packet(), roq_read_packet(), rpl_read_packet(), rsd_read_packet(), s337m_read_packet(), scd_read_packet(), sdns_read_packet(), sdr2_read_packet(), seq_read_packet(), ser_read_packet(), siff_read_packet(), simbiosis_imx_read_packet(), smacker_read_packet(), smjpeg_read_packet(), smush_read_packet(), sol_read_packet(), sup_read_packet(), svag_read_packet(), svs_read_packet(), swf_read_packet(), thp_read_packet(), threedostr_read_packet(), tmv_read_packet(), tta_read_packet(), txd_read_packet(), vag_read_packet(), vc1t_read_packet(), vid_read_packet(), viv_read_packet(), vivo_read_packet(), vpk_read_packet(), wavarc_read_packet(), wc3_read_packet(), wsaud_read_packet(), wsvqa_read_packet(), xa_read_packet(), xmv_fetch_audio_packet(), xmv_fetch_video_packet(), xvag_read_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.
s | associated IO context |
pkt | packet |
size | amount of data to read |
Definition at line 119 of file utils.c.
Referenced by adts_aac_read_packet(), apng_read_packet(), dfa_read_packet(), ea_read_packet(), fits_read_packet(), handle_id3(), is_image(), moflex_read_packet(), mpjpeg_read_packet(), msp_read_packet(), read_packet(), sup_read_packet(), vivo_read_packet(), wc3_read_header(), wc3_read_packet(), and wsvqa_read_packet().
int av_disposition_from_string | ( | const char * | disp | ) |
const char* av_disposition_to_string | ( | int | disposition | ) |
disposition | a combination of AV_DISPOSITION_* values |
Definition at line 523 of file options.c.
Referenced by print_dispositions(), and show_dispositions().
struct AVCodecParserContext* av_stream_get_parser | ( | const AVStream * | s | ) |
Definition at line 32 of file demux_utils.c.
Referenced by ist_dts_update().
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 83 of file demux_utils.c.
int avformat_alloc_output_context2 | ( | AVFormatContext ** | ctx, |
const 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.
ctx | pointee 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 |
Definition at line 93 of file mux.c.
Referenced by avdevice_list_output_sinks(), fifo_mux_init(), hls_mux_init(), initialize_fifo_tst_muxer_chain(), main(), mov_init_ttml_writer(), of_open(), open_output_file(), open_slave(), segment_mux_init(), webm_chunk_init(), and write_muxed_file().