libavformat/utils.c File Reference

various utility functions for use within FFmpeg More...

#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "libavcodec/internal.h"
#include "libavcodec/raw.h"
#include "libavutil/opt.h"
#include "libavutil/dict.h"
#include "libavutil/pixdesc.h"
#include "metadata.h"
#include "id3v2.h"
#include "libavutil/avstring.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "riff.h"
#include "audiointerleave.h"
#include "url.h"
#include <sys/time.h>
#include <time.h>
#include <stdarg.h>
#include <assert.h>

Go to the source code of this file.

Defines

#define LICENSE_PREFIX   "libavformat license: "

#define PROBE_BUF_MIN   2048

size of probe buffer, for guessing file type from file contents

#define PROBE_BUF_MAX   (1<<20)

#define DURATION_MAX_READ_SIZE   250000

#define DURATION_MAX_RETRY   3

#define CHUNK_START   0x1000

#define PRINT(...)   do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)

#define PRINT(...)   do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)

Functions

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.

static void frac_init (AVFrac *f, int64_t val, int64_t num, int64_t den)

f = val + (num / den) + 0.5.

static void frac_add (AVFrac *f, int64_t incr)

Fractional addition to f: f = f + (incr / f->den).

AVInputFormat * av_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.

AVOutputFormat * av_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.

void av_register_input_format (AVInputFormat *format)

void av_register_output_format (AVOutputFormat *format)

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.

static int match_format (const char *name, const char *names)

AVOutputFormat * av_guess_format (const char *short_name, const char *filename, const char *mime_type)

Return the output format in the list of registered output formats which best matches the provided parameters, or return NULL if there is no match.

enum 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.

AVInputFormat * av_find_input_format (const char *short_name)

Find AVInputFormat based on the short name of the input format.

int ffio_limit (AVIOContext *s, int size)

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.

int av_filename_number_test (const char *filename)

Check whether filename actually is a numbered sequence generator.

AVInputFormat * av_probe_input_format3 (AVProbeData *pd, int is_opened, int *score_ret)

Guess the file format.

AVInputFormat * av_probe_input_format2 (AVProbeData *pd, int is_opened, int *score_max)

Guess the file format.

AVInputFormat * av_probe_input_format (AVProbeData *pd, int is_opened)

Guess the file format.

static int set_codec_from_probe_data (AVFormatContext *s, AVStream *st, AVProbeData *pd)

static AVDictionary * convert_format_parameters (AVFormatParameters *ap)

int av_open_input_stream (AVFormatContext **ic_ptr, AVIOContext *pb, const char *filename, AVInputFormat *fmt, AVFormatParameters *ap)

Open a media file from an IO stream.

int av_demuxer_open (AVFormatContext *ic, AVFormatParameters *ap)

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 av_open_input_file (AVFormatContext **ic_ptr, const char *filename, AVInputFormat *fmt, int buf_size, AVFormatParameters *ap)

Open a media file as input.

static int init_input (AVFormatContext *s, const char *filename, AVDictionary **options)

int avformat_open_input (AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)

Open an input stream and read the header.

static AVPacket * add_to_pktbuf (AVPacketList **packet_buffer, AVPacket *pkt, AVPacketList **plast_pktl)

int av_read_packet (AVFormatContext *s, AVPacket *pkt)

Read a transport packet from a media file.

static int get_audio_frame_size (AVCodecContext *enc, int size)

Get the number of samples of an audio frame.

static void compute_frame_duration (int *pnum, int *pden, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)

Return the frame duration in seconds.

static int is_intra_only (AVCodecContext *enc)

static void update_initial_timestamps (AVFormatContext *s, int stream_index, int64_t dts, int64_t pts)

static void update_initial_durations (AVFormatContext *s, AVStream *st, AVPacket *pkt)

static void compute_pkt_fields (AVFormatContext *s, AVStream *st, AVCodecParserContext *pc, AVPacket *pkt)

static int read_frame_internal (AVFormatContext *s, AVPacket *pkt)

int av_read_frame (AVFormatContext *s, AVPacket *pkt)

Return the next frame of a stream.

static void flush_packet_queue (AVFormatContext *s)

int av_find_default_stream_index (AVFormatContext *s)

void ff_read_frame_flush (AVFormatContext *s)

Flush the frame reader.

void av_update_cur_dts (AVFormatContext *s, AVStream *ref_st, int64_t timestamp)

void ff_update_cur_dts (AVFormatContext *s, AVStream *ref_st, int64_t timestamp)

Update cur_dts of all streams based on the given timestamp and AVStream.

void ff_reduce_index (AVFormatContext *s, int stream_index)

Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by discarding entries if it grows too large.

int ff_add_index_entry (AVIndexEntry **index_entries, int *nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)

Internal version of av_add_index_entry.

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.

int ff_index_search_timestamp (const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)

Internal version of av_index_search_timestamp.

int av_index_search_timestamp (AVStream *st, int64_t wanted_timestamp, int flags)

Get the index for a specific timestamp.

int av_seek_frame_binary (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)

int ff_seek_frame_binary (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)

Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().

int64_t av_gen_search (AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))

int64_t ff_gen_search (AVFormatContext *s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t *ts_ret, int64_t(*read_timestamp)(struct AVFormatContext *, int, int64_t *, int64_t))

Perform a binary search using read_timestamp().

static int seek_frame_byte (AVFormatContext *s, int stream_index, int64_t pos, int flags)

static int seek_frame_generic (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)

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.

static int has_duration (AVFormatContext *ic)

Return TRUE if the stream has accurate duration in any stream.

static void update_stream_timings (AVFormatContext *ic)

Estimate the stream timings from the one of each components.

static void fill_all_stream_timings (AVFormatContext *ic)

static void estimate_timings_from_bit_rate (AVFormatContext *ic)

static void estimate_timings_from_pts (AVFormatContext *ic, int64_t old_offset)

static void estimate_timings (AVFormatContext *ic, int64_t old_offset)

static int has_codec_parameters (AVCodecContext *avctx)

static int has_decode_delay_been_guessed (AVStream *st)

static int try_decode_frame (AVStream *st, AVPacket *avpkt, AVDictionary **options)

unsigned int ff_codec_get_tag (const AVCodecTag *tags, enum CodecID id)

enum CodecID ff_codec_get_id (const AVCodecTag *tags, unsigned int tag)

unsigned int av_codec_get_tag (const AVCodecTag *const *tags, enum CodecID id)

enum CodecID av_codec_get_id (const AVCodecTag *const *tags, unsigned int tag)

static void compute_chapters_end (AVFormatContext *s)

static int get_std_framerate (int i)

static int tb_unreliable (AVCodecContext *c)

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.

AVProgram * av_find_program_from_stream (AVFormatContext *ic, AVProgram *last, int s)

Find the programs which belong to a given stream.

int av_find_best_stream (AVFormatContext *ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec **decoder_ret, int flags)

Find the "best" stream in the file.

int av_read_play (AVFormatContext *s)

Start playing a network-based stream (e.g.

int av_read_pause (AVFormatContext *s)

Pause a network-based stream (e.g.

void av_close_input_stream (AVFormatContext *s)

Free a AVFormatContext allocated by av_open_input_stream.

void avformat_free_context (AVFormatContext *s)

Free an AVFormatContext and all its streams.

void av_close_input_file (AVFormatContext *s)

void avformat_close_input (AVFormatContext **ps)

Close an opened input AVFormatContext.

AVStream * av_new_stream (AVFormatContext *s, int id)

Add a new stream to a media file.

AVStream * avformat_new_stream (AVFormatContext *s, AVCodec *c)

Add a new stream to a media file.

AVProgram * av_new_program (AVFormatContext *ac, int id)

AVChapter * avpriv_new_chapter (AVFormatContext *s, int id, AVRational time_base, int64_t start, int64_t end, const char *title)

Add a new chapter.

int av_set_parameters (AVFormatContext *s, AVFormatParameters *ap)

int avformat_alloc_output_context2 (AVFormatContext **avctx, AVOutputFormat *oformat, const char *format, const char *filename)

Allocate an AVFormatContext for an output format.

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

static int validate_codec_tag (AVFormatContext *s, AVStream *st)

int av_write_header (AVFormatContext *s)

Allocate the stream private data and write the stream header to an output media file.

int avformat_write_header (AVFormatContext *s, AVDictionary **options)

Allocate the stream private data and write the stream header to an output media file.

static int compute_pkt_fields2 (AVFormatContext *s, AVStream *st, AVPacket *pkt)

int av_write_frame (AVFormatContext *s, AVPacket *pkt)

Write a packet to an output media file.

int ff_interleave_add_packet (AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, AVPacket *, AVPacket *))

Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare() function argument.

static int ff_interleave_compare_dts (AVFormatContext *s, AVPacket *next, AVPacket *pkt)

int av_interleave_packet_per_dts (AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)

Interleave a packet per dts in an output media file.

static int interleave_packet (AVFormatContext *s, AVPacket *out, AVPacket *in, int flush)

Interleave an AVPacket correctly so it can be muxed.

int av_interleaved_write_frame (AVFormatContext *s, AVPacket *pkt)

Write a packet to an output media file ensuring correct interleaving.

int av_write_trailer (AVFormatContext *s)

Write the stream trailer to an output media file and free the file private data.

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 ff_program_add_stream_index (AVFormatContext *ac, int progid, unsigned int idx)

static void print_fps (double d, const char *postfix)

static void dump_metadata (void *ctx, AVDictionary *m, const char *indent)

static void dump_stream_format (AVFormatContext *ic, int i, int index, int is_output)

void dump_format (AVFormatContext *ic, int index, const char *url, int is_output)

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.

uint64_t ff_ntp_time (void)

Get the current time since NTP epoch in microseconds.

int64_t parse_date (const char *timestr, int duration)

Parse datestr and return a corresponding number of microseconds.

int find_info_tag (char *arg, int arg_size, const char *tag1, const char *info)

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.

static void hex_dump_internal (void *avcl, FILE *f, int level, uint8_t *buf, int size)

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.

static void pkt_dump_internal (void *avcl, FILE *f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)

void av_pkt_dump (FILE *f, AVPacket *pkt, int dump_payload)

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_log (void *avcl, int level, AVPacket *pkt, int dump_payload)

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.

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.

char * ff_data_to_hex (char *buff, const uint8_t *src, int s, int lowercase)

int ff_hex_to_data (uint8_t *data, const char *p)

Parse a string of hexadecimal strings.

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

void avpriv_set_pts_info (AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)

Set the pts for a given stream.

int ff_url_join (char *str, int size, const char *proto, const char *authorization, const char *hostname, int port, const char *fmt,...)

int ff_write_chained (AVFormatContext *dst, int dst_stream, AVPacket *pkt, AVFormatContext *src)

Write a packet to another muxer than the one the user originally intended.

void ff_parse_key_value (const char *str, ff_parse_key_val_cb callback_get_buf, void *context)

Parse a string with comma-separated key=value pairs.

int ff_find_stream_index (AVFormatContext *s, int id)

Find stream index based on format-specific stream ID.

void ff_make_absolute_url (char *buf, int size, const char *base, const char *rel)

int64_t ff_iso8601_to_unix_time (const char *datestr)

Convert a date string in ISO8601 format to Unix timestamp.

int avformat_query_codec (AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)

Test if the given container can store a codec.

int avformat_network_init (void)

Do global initialization of network components.

int avformat_network_deinit (void)

Undo the initialization done by avformat_network_init.

Variables

static AVInputFormat * first_iformat = NULL

head of registered input format linked list

static AVOutputFormat * first_oformat = NULL

head of registered output format linked list

Detailed Description

various utility functions for use within FFmpeg

Definition in file utils.c.

Define Documentation

#define CHUNK_START 0x1000

Definition at line 3301 of file utils.c.

Referenced by ff_interleave_add_packet().

#define DURATION_MAX_READ_SIZE 250000

Definition at line 2068 of file utils.c.

Referenced by estimate_timings_from_pts().

#define DURATION_MAX_RETRY 3

Definition at line 2069 of file utils.c.

Referenced by estimate_timings_from_pts().

#define LICENSE_PREFIX "libavformat license: "

#define PRINT ( ... ) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)

#define PROBE_BUF_MAX (1<<20)

Definition at line 532 of file utils.c.

Referenced by av_probe_input_buffer().

#define PROBE_BUF_MIN 2048

size of probe buffer, for guessing file type from file contents

Definition at line 531 of file utils.c.

Referenced by av_probe_input_buffer().

Function Documentation

static AVPacket* add_to_pktbuf	(	AVPacketList **	packet_buffer,
		AVPacket *	pkt,
		AVPacketList **	plast_pktl
	)			`[static]`

Definition at line 733 of file utils.c.

Referenced by av_read_frame(), av_read_packet(), and avformat_find_stream_info().

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.

Update the entry if the list already contains it.

Parameters:

timestamp

timestamp in the time base of the given stream

Definition at line 1533 of file utils.c.

Referenced by ape_read_header(), asf_build_simple_index(), asf_read_pts(), avi_read_idx1(), avi_sync(), clean_index(), find_and_decode_index(), flv_read_packet(), gxf_read_index(), matroska_add_index_entries(), matroska_parse_block(), mov_read_trun(), mpc8_parse_seektable(), mpc_read_packet(), mpegps_read_pes_header(), mpegts_get_dts(), mxf_parse_index(), nsv_parse_NSVs_header(), nut_write_packet(), nuv_read_dts(), parse_keyframes_index(), pmp_header(), pva_read_header(), read_braindead_odml_indx(), read_frame_internal(), read_header(), read_pakt_chunk(), read_part_of_packet(), rl2_read_header(), rm_read_dts(), rm_read_index(), rm_read_packet(), rpl_read_header(), tta_read_header(), wv_read_packet(), and xwma_read_header().

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 308 of file utils.c.

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

enum CodecID av_codec_get_id	(	const AVCodecTag const	tags,
		unsigned int	tag
	)

Definition at line 2306 of file utils.c.

unsigned int av_codec_get_tag	(	const AVCodecTag const	tags,
		enum CodecID	id
	)

Definition at line 2296 of file utils.c.

void av_dump_format	(	AVFormatContext *	ic,
		int	index,
		const char *	url,
		int	is_output
	)

Definition at line 3669 of file utils.c.

Referenced by dump_format(), main(), open_input_file(), opt_input_file(), read_thread(), and transcode_init().

int av_filename_number_test ( const char * filename )

Check whether filename actually is a numbered sequence generator.

Parameters:

filename

possible numbered sequence string

Returns:: 1 if a valid numbered sequence string, 0 otherwise

Definition at line 324 of file utils.c.

Referenced by av_guess_format(), avformat_open_input(), opt_output_file(), and read_probe().

int av_find_default_stream_index ( AVFormatContext * s )

Definition at line 1399 of file utils.c.

Referenced by av_seek_frame().

int64_t av_gen_search	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int64_t	pos_min,
		int64_t	pos_max,
		int64_t	pos_limit,
		int64_t	ts_min,
		int64_t	ts_max,
		int	flags,
		int64_t *	ts_ret,
		int64_t()(struct AVFormatContext , int, int64_t *, int64_t)	read_timestamp
	)

Definition at line 1651 of file utils.c.

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.

Also handles the '0nd' format where 'n' is the total number of digits and '%'.

Parameters:

	buf	destination buffer
	buf_size	destination buffer size
	path	numbered sequence string
	number	frame number

Returns:: 0 if OK, -1 on format error

Definition at line 3780 of file utils.c.

Referenced by av_filename_number_test(), find_image_range(), and read_packet().

int av_get_output_timestamp	(	struct AVFormatContext *	s,
		int	stream,
		int64_t *	dts,
		int64_t *	wall
	)

Get timing information for the data currently output.

The exact meaning of "currently output" depends on the format. It is mostly relevant for devices that have an internal buffer and/or work in real time.

Parameters:

	s	media file handle
	stream	stream in the media file
	dts[out]	DTS of the last packet output for the stream, in stream time_base units
	wall[out]	absolute time when that packet whas output, in microsecond

Returns:: 0 if OK, AVERROR(ENOSYS) if the format does not support it Note: some formats or devices may not allow to measure dts and wall atomically.

Definition at line 3534 of file utils.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:

	pkt	packet
	size	desired payload size

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

Definition at line 287 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(), cin_read_packet(), daud_packet(), dfa_read_packet(), dxa_read_packet(), ea_read_packet(), ff_rm_parse_packet(), ff_rm_retrieve_cache(), film_read_packet(), flv_read_packet(), fourxm_read_packet(), g729_read_packet(), gsm_read_packet(), gxf_packet(), idcin_read_packet(), iff_read_packet(), iss_read_packet(), lmlm4_read_packet(), load_ipmovie_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(), voc_get_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().

int64_t av_gettime ( void )

Get the current time in microseconds.

Definition at line 3748 of file utils.c.

Referenced by applehttp_read(), audio_get_output_timestamp(), audio_read_packet(), bktr_getframe(), enqueue_packet(), fbdev_read_packet(), ff_ntp_time(), ff_rtsp_setup_output_streams(), get_audio_clock(), get_external_clock(), get_video_clock(), get_video_frame(), getutime(), grab_read_header(), grab_read_packet(), http_server(), open_input_stream(), parse_playlist(), print_report(), process_callback(), rate_emu_sleep(), read_data(), read_packet(), rtsp_read_packet(), sap_write_header(), sap_write_packet(), sdl_audio_callback(), stream_toggle_pause(), transcode(), transcode_init(), update_video_pts(), video_audio_display(), video_refresh(), video_thread(), x11grab_read_header(), and x11grab_read_packet().

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.

Definition at line 236 of file utils.c.

Referenced by choose_encoder().

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.

Parameters:

	short_name	if non-NULL checks if short_name matches with the names of the registered formats
	filename	if non-NULL checks if filename terminates with the extensions of the registered formats
	mime_type	if non-NULL checks if mime_type matches with the MIME type of the registered formats

Definition at line 201 of file utils.c.

Referenced by av_guess_format(), avformat_alloc_output_context2(), ff_rtp_chain_mux_open(), ffserver_guess_format(), parse_ffconfig(), and rtp_new_av_stream().

void av_hex_dump	(	FILE *	f,
		uint8_t *	buf,
		int	size
	)

Send a nice hexadecimal dump of a buffer to the specified file stream.

Parameters:

	f	The file stream pointer where the dump should be sent to.
	buf	buffer
	size	buffer size

See also:: av_hex_dump_log, av_pkt_dump2, av_pkt_dump_log2

Definition at line 3864 of file utils.c.

Referenced by pkt_dump_internal().

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.

Parameters:

	avcl	A pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct.
	level	The importance level of the message, lower values signifying higher importance.
	buf	buffer
	size	buffer size

See also:: av_hex_dump, av_pkt_dump2, av_pkt_dump_log2

Definition at line 3869 of file utils.c.

Referenced by asf_read_header().

AVInputFormat* av_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.

Definition at line 126 of file utils.c.

Referenced by av_find_input_format(), av_probe_input_format3(), format_child_class_next(), opt_formats(), probe(), and show_format_opts().

int av_index_search_timestamp	(	AVStream *	st,
		int64_t	timestamp,
		int	flags
	)

Get the index for a specific timestamp.

Parameters:

flags

if AVSEEK_FLAG_BACKWARD then the returned index will correspond to the timestamp which is <= the requested one, if backward is 0, then it will be >= if AVSEEK_FLAG_ANY seek to any frame, only keyframes otherwise

Returns:: < 0 if no such timestamp could be found

Definition at line 1575 of file utils.c.

Referenced by ape_read_seek(), asf_read_seek(), avi_read_packet(), avi_read_seek(), ff_seek_frame_binary(), gxf_seek(), matroska_read_seek(), mov_seek_stream(), mpc8_read_seek(), mpc_read_seek(), mxf_read_seek(), nsv_read_seek(), nut_write_packet(), read_packet(), read_seek(), rl2_read_seek(), seek_frame_generic(), tta_read_seek(), and wv_read_seek().

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.

Parameters:

extensions

a comma-separated list of filename extensions

Definition at line 156 of file utils.c.

Referenced by av_guess_format(), av_probe_input_format3(), http_parse_request(), ipod_get_codec_tag(), mpegts_probe(), mpegts_write_header(), and nsv_probe().

AVProgram* av_new_program	(	AVFormatContext *	ac,
		int	id
	)

Definition at line 2904 of file utils.c.

Referenced by pat_cb(), and sdt_cb().

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 2845 of file utils.c.

AVOutputFormat* av_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.

Definition at line 132 of file utils.c.

Referenced by av_guess_format(), format_child_class_next(), opt_formats(), and show_format_opts().

void av_pkt_dump	(	FILE *	f,
		AVPacket *	pkt,
		int	dump_payload
	)

Definition at line 3901 of file utils.c.

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.

Parameters:

	f	The file stream pointer where the dump should be sent to.
	pkt	packet to dump
	dump_payload	True if the payload must be displayed, too.
	st	AVStream that the packet belongs to

Definition at line 3908 of file utils.c.

void av_pkt_dump_log	(	void *	avcl,
		int	level,
		AVPacket *	pkt,
		int	dump_payload
	)

Definition at line 3914 of file utils.c.

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.

Parameters:

	avcl	A pointer to an arbitrary struct of which the first field is a pointer to an AVClass struct.
	level	The importance level of the message, lower values signifying higher importance.
	pkt	packet to dump
	dump_payload	True if the payload must be displayed, too.
	st	AVStream that the packet belongs to

Definition at line 3921 of file utils.c.

Referenced by transcode().

void av_register_input_format ( AVInputFormat * format )

Definition at line 138 of file utils.c.

void av_register_output_format ( AVOutputFormat * format )

Definition at line 147 of file utils.c.

int av_seek_frame_binary	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int	flags
	)

Definition at line 1583 of file utils.c.

int av_set_parameters	(	AVFormatContext *	s,
		AVFormatParameters *	ap
	)

Deprecated:: pass the options to avformat_write_header directly.

Definition at line 2955 of file utils.c.

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 4038 of file utils.c.

Referenced by add_av_stream1().

void av_update_cur_dts	(	AVFormatContext *	s,
		AVStream *	ref_st,
		int64_t	timestamp
	)

Definition at line 1455 of file utils.c.

Referenced by mxf_read_seek(), and seek_frame_byte().

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.

The pointers to buffers for storing individual components may be null, in order to ignore that component. Buffers for components not found are set to empty strings. If the port is not found, it is set to a negative value.

Parameters:

	proto	the buffer for the protocol
	proto_size	the size of the proto buffer
	authorization	the buffer for the authorization
	authorization_size	the size of the authorization buffer
	hostname	the buffer for the host name
	hostname_size	the size of the hostname buffer
	port_ptr	a pointer to store the port number in
	path	the buffer for the path
	path_size	the size of the path buffer
	url	the URL to split

Definition at line 3927 of file utils.c.

Referenced by ff_rtp_set_remote_url(), ff_udp_set_remote_url(), find_rtp_session_with_url(), gopher_open(), http_open_cnx(), mms_open(), mmsh_open_internal(), resetup_tcp(), rtmp_open(), rtp_open(), rtsp_cmd_describe(), rtsp_cmd_setup(), sap_read_header(), sap_write_header(), tcp_open(), tls_open(), and udp_open().

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 3026 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 2972 of file utils.c.

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

const char* avformat_configuration ( void )

Return the libavformat build-time configuration.

Definition at line 60 of file utils.c.

void avformat_free_context ( AVFormatContext * s )

Free an AVFormatContext and all its streams.

Parameters:

s

context to free

Definition at line 2784 of file utils.c.

Referenced by applehttp_read_header(), av_close_input_stream(), avformat_alloc_output_context2(), avformat_open_input(), exit_program(), ff_mov_close_hinting(), ff_rtp_chain_mux_open(), ff_rtsp_undo_setup(), main(), and sap_write_close().

const char* avformat_license ( void )

Return the libavformat license.

Definition at line 65 of file utils.c.

int avformat_network_deinit ( void )

Undo the initialization done by avformat_network_init.

Definition at line 4285 of file utils.c.

Referenced by do_exit(), exit_program(), main(), and term_init().

int avformat_network_init ( void )

Do global initialization of network components.

This is optional, but recommended, since it avoids the overhead of implicitly doing the setup for each session.

Calling this function will become mandatory if using network protocols at some major version bump.

Definition at line 4273 of file utils.c.

Referenced by main().

AVStream* avformat_new_stream	(	AVFormatContext *	s,
		AVCodec *	c
	)

Add a new stream to a media file.

When demuxing, it is called by the demuxer in read_header(). If the flag AVFMTCTX_NOHEADER is set in s.ctx_flags, then it may also be called in read_packet().

When muxing, should be called by the user before avformat_write_header().

Parameters:

c

If non-NULL, the AVCodecContext corresponding to the new stream will be initialized to use this codec. This is needed for e.g. codec-specific defaults to be set, so codec should be provided if it is known.

Returns:: newly created stream or NULL on error.

Definition at line 2854 of file utils.c.

Referenced by add_audio_stream(), add_dstream(), add_video_stream(), adts_aac_read_header(), adx_read_header(), aea_read_header(), aiff_read_header(), amr_read_header(), apc_read_header(), ape_read_header(), applehttp_read_header(), asf_read_stream_properties(), au_read_header(), audio_read_header(), av_new_stream(), avi_read_header(), avisynth_read_header(), avpriv_dv_init_demux(), avs_read_packet(), bfi_read_header(), bmv_read_header(), cdata_read_header(), cin_read_header(), create_audio_stream(), create_stream(), daud_header(), dc1394_read_header(), decode_main_header(), dfa_read_header(), dshow_add_device(), dv_extract_audio_info(), dxa_read_header(), ea_read_header(), fbdev_read_header(), ff_raw_audio_read_header(), ff_raw_read_header(), ff_raw_video_read_header(), ff_rtp_chain_mux_open(), ffm_read_header(), film_read_header(), flac_read_header(), flic_read_header(), fourxm_read_header(), g723_1_init(), g729_read_header(), get_attachment(), get_sindex(), grab_read_header(), gsm_read_header(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), iss_read_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lxf_read_header(), matroska_read_header(), microdvd_read_header(), mmf_read_header(), modplug_read_header(), mov_read_trak(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpegps_read_packet(), mpegts_push_data(), mpegts_read_header(), mpegts_set_stream_info(), msnwc_tcp_read_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxg_read_header(), nc_read_header(), new_output_stream(), new_stream(), nsv_parse_NSVs_header(), nut_read_header(), nuv_header(), ogg_new_stream(), oma_read_header(), pmp_header(), pmt_cb(), pulse_read_header(), pva_read_header(), qcp_read_header(), r3d_read_red1(), read_desc_chunk(), read_header(), read_packet(), rl2_read_header(), rm_read_header(), rm_read_header_old(), roq_read_header(), roq_read_packet(), rpl_read_header(), rso_read_header(), sap_fetch_packet(), sap_read_header(), seq_read_header(), siff_parse_vbv1(), smacker_read_header(), smjpeg_read_header(), sol_read_header(), sox_read_header(), spdif_read_packet(), srt_read_header(), str_read_packet(), swf_read_packet(), thp_read_header(), tmv_read_header(), tta_read_header(), txd_read_header(), v4l2_read_header(), vc1t_read_header(), vfw_read_header(), vid_read_header(), vmd_read_header(), voc_read_header(), vqf_read_header(), wc3_read_header(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

int avformat_query_codec	(	AVOutputFormat *	ofmt,
		enum CodecID	codec_id,
		int	std_compliance
	)

Test if the given container can store a codec.

Parameters:

std_compliance

standards compliance level, one of FF_COMPLIANCE_*

Returns:: 1 if codec with ID codec_id can be stored in ofmt, 0 if it cannot. A negative number if this information is not available.

Definition at line 4259 of file utils.c.

unsigned avformat_version ( void )

Return the LIBAVFORMAT_VERSION_INT constant.

Definition at line 55 of file utils.c.

AVChapter* avpriv_new_chapter	(	AVFormatContext *	s,
		int	id,
		AVRational	time_base,
		int64_t	start,
		int64_t	end,
		const char *	title
	)

Add a new chapter.

Parameters:

	s	media file handle
	id	unique ID for this chapter
	start	chapter start time in time_base units
	end	chapter end time in time_base units
	title	chapter title

Returns:: AVChapter or NULL on error

Definition at line 2927 of file utils.c.

Referenced by asf_read_marker(), decode_info_header(), flac_read_header(), matroska_read_header(), mov_read_chapters(), mov_read_chpl(), ogm_chapter(), read_chapter(), and read_header().

void avpriv_set_pts_info	(	AVStream *	s,
		int	pts_wrap_bits,
		unsigned int	pts_num,
		unsigned int	pts_den
	)

Set the pts for a given stream.

If the new values would be invalid (<= 0), it leaves the AVStream unchanged.

Parameters:

	s	stream
	pts_wrap_bits	number of bits effectively used by the pts (used for wrap control, 33 is the value for MPEG)
	pts_num	numerator to convert to seconds (MPEG: 1)
	pts_den	denominator to convert to seconds (MPEG: 90000)

Definition at line 4045 of file utils.c.

Referenced by adts_aac_read_header(), adx_read_header(), aiff_read_header(), aiff_write_header(), amr_read_header(), ape_read_header(), asf_read_stream_properties(), asf_write_header1(), asfrtp_parse_sdp_line(), au_read_header(), audio_read_header(), audio_write_header(), av_set_pts_info(), avformat_new_stream(), avi_read_header(), avi_write_header(), avisynth_read_header(), bfi_read_header(), bmv_read_header(), cdata_read_header(), celt_header(), cin_read_header(), create_audio_stream(), create_stream(), dc1394_read_header(), decode_stream_header(), dfa_read_header(), dirac_header(), dshow_add_device(), dv_extract_audio_info(), dv_extract_video_info(), dxa_read_header(), ea_read_header(), fbdev_read_header(), ff_raw_read_header(), ff_raw_video_read_header(), ff_rm_read_mdpr_codecdata(), ffm_read_header(), ffm_write_header(), film_read_header(), flac_header(), flac_read_header(), flic_read_header(), flv_write_header(), fourxm_read_header(), g723_1_init(), g729_read_header(), get_packet_header(), grab_read_header(), gsm_read_header(), gxf_header(), gxf_write_header(), idcin_read_header(), iff_read_header(), ipmovie_read_header(), iss_read_header(), lavfi_read_header(), lmlm4_read_header(), loas_read_header(), lxf_read_header(), matroska_read_header(), microdvd_read_header(), mkv_write_tracks(), mmf_read_header(), modplug_read_header(), mov_read_trak(), mov_write_header(), mp3_read_header(), mpc8_read_header(), mpc_read_header(), mpeg_mux_init(), mpegts_read_header(), mpegts_set_stream_info(), mpegts_write_header(), msnwc_tcp_read_header(), mtv_read_header(), mxf_parse_structural_metadata(), mxf_write_header(), mxg_read_header(), nc_read_header(), new_stream(), nsv_parse_NSVs_header(), nut_read_header(), nut_write_header(), nuv_header(), ogg_new_stream(), ogg_write_header(), ogm_header(), old_dirac_header(), oma_read_header(), pmp_header(), pulse_read_header(), pva_read_header(), qt_rtp_parse_packet(), r3d_read_red1(), read_gab2_sub(), read_header(), read_sl_header(), rl2_read_header(), roq_read_header(), roq_read_packet(), rpl_read_header(), rso_read_header(), seq_read_header(), siff_parse_vbv1(), skeleton_header(), smacker_read_header(), smjpeg_read_header(), sol_read_header(), sox_read_header(), speex_header(), srt_read_header(), str_read_packet(), swf_read_packet(), theora_header(), thp_read_header(), tmv_read_header(), tta_read_header(), v4l2_read_header(), vc1t_read_header(), vc1test_write_header(), vfw_read_header(), vid_read_header(), vmd_read_header(), vorbis_header(), vqf_read_header(), wc3_read_header(), write_header(), write_stream_data(), wsaud_read_header(), wsvqa_read_header(), wv_read_header(), x11grab_read_header(), xa_read_header(), xmv_read_header(), xwma_read_header(), yop_read_header(), and yuv4_read_header().

static void compute_chapters_end ( AVFormatContext * s ) [static]

Definition at line 2316 of file utils.c.

static void compute_frame_duration	(	int *	pnum,
		int *	pden,
		AVStream *	st,
		AVCodecParserContext *	pc,
		AVPacket *	pkt
	)			`[static]`

Return the frame duration in seconds.

Return 0 if not available.

Definition at line 882 of file utils.c.

Referenced by compute_pkt_fields(), and compute_pkt_fields2().

static void compute_pkt_fields	(	AVFormatContext *	s,
		AVStream *	st,
		AVCodecParserContext *	pc,
		AVPacket *	pkt
	)			`[static]`

Definition at line 1012 of file utils.c.

Referenced by read_frame_internal().

static int compute_pkt_fields2	(	AVFormatContext *	s,
		AVStream *	st,
		AVPacket *	pkt
	)			`[static]`

Definition at line 3215 of file utils.c.

Referenced by av_interleaved_write_frame(), and av_write_frame().

static AVDictionary* convert_format_parameters ( AVFormatParameters * ap ) [static]

Definition at line 424 of file utils.c.

Referenced by av_open_input_file(), and av_open_input_stream().

void dump_format	(	AVFormatContext *	ic,
		int	index,
		const char *	url,
		int	is_output
	)

Deprecated:: Deprecated in favor of av_dump_format().

Definition at line 3660 of file utils.c.

Referenced by transcode_init().

static void dump_metadata	(	void *	ctx,
		AVDictionary *	m,
		const char *	indent
	)			`[static]`

Definition at line 3578 of file utils.c.

Referenced by av_dump_format(), and dump_stream_format().

static void dump_stream_format	(	AVFormatContext *	ic,
		int	i,
		int	index,
		int	is_output
	)			`[static]`

Definition at line 3597 of file utils.c.

Referenced by av_dump_format().

static void estimate_timings	(	AVFormatContext *	ic,
		int64_t	old_offset
	)			`[static]`

Definition at line 2152 of file utils.c.

static void estimate_timings_from_bit_rate ( AVFormatContext * ic ) [static]

Definition at line 2036 of file utils.c.

Referenced by estimate_timings().

static void estimate_timings_from_pts	(	AVFormatContext *	ic,
		int64_t	old_offset
	)			`[static]`

Definition at line 2072 of file utils.c.

Referenced by estimate_timings().

int ff_add_index_entry	(	AVIndexEntry **	index_entries,
		int *	nb_index_entries,
		unsigned int *	index_entries_allocated_size,
		int64_t	pos,
		int64_t	timestamp,
		int	size,
		int	distance,
		int	flags
	)

Internal version of av_add_index_entry.

Definition at line 1487 of file utils.c.

Referenced by av_add_index_entry(), and read_header().

enum CodecID ff_codec_get_id	(	const AVCodecTag *	tags,
		unsigned int	tag
	)

unsigned int ff_codec_get_tag	(	const AVCodecTag *	tags,
		enum CodecID	id
	)

Definition at line 2272 of file utils.c.

Referenced by av_codec_get_tag(), caf_write_header(), gxf_write_header(), ipod_get_codec_tag(), mkv_write_codecprivate(), mkv_write_tracks(), mov_find_codec_tag(), mov_get_codec_tag(), mov_write_esds_tag(), mp4_get_codec_tag(), and swf_write_video().

char* ff_data_to_hex	(	char *	buff,
		const uint8_t *	src,
		int	s,
		int	lowercase
	)

Definition at line 3988 of file utils.c.

Referenced by ff_rdt_calc_response_and_checksum(), hex_log(), make_digest_auth(), and open_input().

int ff_find_stream_index	(	AVFormatContext *	s,
		int	id
	)

Find stream index based on format-specific stream ID.

Returns:: stream index, or < 0 on error

Definition at line 4180 of file utils.c.

Referenced by get_sindex(), parse_chunks(), and pmt_cb().

int64_t ff_gen_search	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int64_t	pos_min,
		int64_t	pos_max,
		int64_t	pos_limit,
		int64_t	ts_min,
		int64_t	ts_max,
		int	flags,
		int64_t *	ts_ret,
		int64_t()(struct AVFormatContext , int, int64_t *, int64_t)	read_timestamp
	)

Perform a binary search using read_timestamp().

Parameters:

	target_ts	target timestamp in the time base of the given stream
	stream_index	stream number

Definition at line 1662 of file utils.c.

Referenced by av_gen_search(), ff_seek_frame_binary(), and read_seek().

int ff_hex_to_data	(	uint8_t *	data,
		const char *	p
	)

Parse a string of hexadecimal strings.

Any space between the hexadecimal digits is ignored.

Parameters:

	data	if non-null, the parsed data is written to this pointer
	p	the string to parse

Returns:: the number of bytes written (or to be written, if data is null)

Definition at line 4009 of file utils.c.

Referenced by parse_fmtp_config(), and parse_playlist().

int ff_index_search_timestamp	(	const AVIndexEntry *	entries,
		int	nb_entries,
		int64_t	wanted_timestamp,
		int	flags
	)

Internal version of av_index_search_timestamp.

Definition at line 1541 of file utils.c.

Referenced by av_index_search_timestamp(), ff_add_index_entry(), and read_seek().

int ff_interleave_add_packet	(	AVFormatContext *	s,
		AVPacket *	pkt,
		int()(AVFormatContext , AVPacket , AVPacket )	compare
	)

Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare() function argument.

Returns:: 0, or < 0 on error

Definition at line 3303 of file utils.c.

Referenced by av_interleave_packet_per_dts(), and ff_audio_rechunk_interleave().

static int ff_interleave_compare_dts	(	AVFormatContext *	s,
		AVPacket *	next,
		AVPacket *	pkt
	)			`[static]`

Definition at line 3362 of file utils.c.

Referenced by av_interleave_packet_per_dts().

int64_t ff_iso8601_to_unix_time ( const char * datestr )

Convert a date string in ISO8601 format to Unix timestamp.

Definition at line 4241 of file utils.c.

Referenced by dv_init_mux(), gxf_write_umf_material_description(), mov_write_header(), and mxf_write_header().

void ff_make_absolute_url	(	char *	buf,
		int	size,
		const char *	base,
		const char *	rel
	)

Definition at line 4190 of file utils.c.

Referenced by new_variant(), and parse_playlist().

uint64_t ff_ntp_time ( void )

Get the current time since NTP epoch in microseconds.

Definition at line 3755 of file utils.c.

Referenced by rtp_write_header(), and rtp_write_packet().

void ff_parse_key_value	(	const char *	str,
		ff_parse_key_val_cb	callback_get_buf,
		void *	context
	)

Parse a string with comma-separated key=value pairs.

The value strings may be quoted and may contain escaped characters within quoted strings.

Parameters:

	str	the string to parse
	callback_get_buf	function that returns where to store the unescaped value string.
	context	the opaque context pointer to pass to callback_get_buf

Definition at line 4126 of file utils.c.

Referenced by ff_http_auth_handle_header(), and parse_playlist().

void ff_program_add_stream_index	(	AVFormatContext *	ac,
		int	progid,
		unsigned int	idx
	)

Definition at line 3543 of file utils.c.

Referenced by pmt_cb().

void ff_read_frame_flush ( AVFormatContext * s )

Flush the frame reader.

Definition at line 1421 of file utils.c.

Referenced by av_seek_frame(), avformat_seek_file(), ff_restore_parser_state(), ff_seek_frame_binary(), mpegts_get_dts(), search_hi_lo_keyframes(), and seek_frame_generic().

void ff_reduce_index	(	AVFormatContext *	s,
		int	stream_index
	)

Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by discarding entries if it grows too large.

Definition at line 1474 of file utils.c.

Referenced by mpegps_read_pes_header(), mpegts_get_dts(), and read_frame_internal().

int ff_seek_frame_binary	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	target_ts,
		int	flags
	)

Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().

Parameters:

	target_ts	target timestamp in the time base of the given stream
	stream_index	stream number

Definition at line 1588 of file utils.c.

Referenced by asf_read_seek(), av_seek_frame_binary(), and ogg_read_seek().

void ff_update_cur_dts	(	AVFormatContext *	s,
		AVStream *	ref_st,
		int64_t	timestamp
	)

Update cur_dts of all streams based on the given timestamp and AVStream.

Stream ref_st unchanged, others set cur_dts in their native time base. Only needed for timestamp wrapping or if (dts not set and pts!=dts).

Parameters:

	timestamp	new dts expressed in time_base of param ref_st
	ref_st	reference stream giving time_base of param timestamp

Definition at line 1461 of file utils.c.

Referenced by av_update_cur_dts(), ff_seek_frame_binary(), matroska_read_seek(), mxf_read_seek(), and seek_frame_generic().

int ff_url_join	(	char *	str,
		int	size,
		const char *	proto,
		const char *	authorization,
		const char *	hostname,
		int	port,
		const char *	fmt,
			...
	)

Definition at line 4063 of file utils.c.

int ff_write_chained	(	AVFormatContext *	dst,
		int	dst_stream,
		AVPacket *	pkt,
		AVFormatContext *	src
	)

Write a packet to another muxer than the one the user originally intended.

Useful when chaining muxers, where one muxer internally writes a received packet to another muxer.

Parameters:

	dst	the muxer to write the packet to
	dst_stream	the stream index within dst to write the packet to
	pkt	the packet to be written
	src	the muxer the packet originally was intended for

Returns:: the value av_write_frame returned

Definition at line 4108 of file utils.c.

Referenced by ff_mov_add_hinted_packet(), rtsp_write_packet(), and sap_write_packet().

int ffio_limit	(	AVIOContext *	s,
		int	size
	)

Definition at line 267 of file utils.c.

Referenced by av_get_packet(), cin_read_packet(), film_read_packet(), roq_read_packet(), siff_read_packet(), and vmd_read_packet().

static void fill_all_stream_timings ( AVFormatContext * ic ) [static]

Definition at line 2019 of file utils.c.

Referenced by estimate_timings(), and estimate_timings_from_pts().

int find_info_tag	(	char *	arg,
		int	arg_size,
		const char *	tag1,
		const char *	info
	)

Deprecated:: use av_find_info_tag in libavutil instead.

Definition at line 3774 of file utils.c.

static void flush_packet_queue ( AVFormatContext * s ) [static]

Definition at line 1373 of file utils.c.

Referenced by av_close_input_stream(), estimate_timings_from_pts(), and ff_read_frame_flush().

static void frac_add	(	AVFrac *	f,
		int64_t	incr
	)			`[static]`

Fractional addition to f: f = f + (incr / f->den).

Parameters:

	f	fractional number
	incr	increment, can be positive or negative

Definition at line 101 of file utils.c.

Referenced by compute_pkt_fields2().

static void frac_init	(	AVFrac *	f,
		int64_t	val,
		int64_t	num,
		int64_t	den
	)			`[static]`

f = val + (num / den) + 0.5.

'num' is normalized so that it is such as 0 <= num < den.

Parameters:

	f	fractional number
	val	integer value
	num	must be >= 0
	den	must be >= 1

Definition at line 83 of file utils.c.

Referenced by avformat_write_header().

static int get_audio_frame_size	(	AVCodecContext *	enc,
		int	size
	)			`[static]`

Get the number of samples of an audio frame.

Return -1 on error.

Definition at line 852 of file utils.c.

Referenced by compute_frame_duration(), and compute_pkt_fields2().

static int get_std_framerate ( int i ) [static]

Definition at line 2337 of file utils.c.

Referenced by avformat_find_stream_info().

static int has_codec_parameters ( AVCodecContext * avctx ) [static]

Definition at line 2196 of file utils.c.

Referenced by avformat_find_stream_info(), and try_decode_frame().

static int has_decode_delay_been_guessed ( AVStream * st ) [static]

Definition at line 2223 of file utils.c.

Referenced by try_decode_frame().

static int has_duration ( AVFormatContext * ic ) [static]

Return TRUE if the stream has accurate duration in any stream.

Returns:: TRUE if the stream has accurate duration for at least one component.

Definition at line 1951 of file utils.c.

Referenced by estimate_timings().

static void hex_dump_internal	(	void *	avcl,
		FILE *	f,
		int	level,
		uint8_t *	buf,
		int	size
	)			`[static]`

Definition at line 3835 of file utils.c.

Referenced by av_hex_dump(), and av_hex_dump_log().

static int init_input	(	AVFormatContext *	s,
		const char *	filename,
		AVDictionary **	options
	)			`[static]`

Definition at line 629 of file utils.c.

Referenced by avformat_open_input().

static int interleave_packet	(	AVFormatContext *	s,
		AVPacket *	out,
		AVPacket *	in,
		int	flush
	)			`[static]`

Interleave an AVPacket correctly so it can be muxed.

Parameters:

	out	the interleaved packet will be output here
	in	the input packet
	flush	1 if no further packets are available as input and all remaining packets should be output

Returns:: 1 if a packet was output, 0 if no packet could be output, < 0 if an error occurred

Definition at line 3452 of file utils.c.

Referenced by av_interleaved_write_frame(), and av_write_trailer().

static int is_intra_only ( AVCodecContext * enc ) [static]

Definition at line 922 of file utils.c.

Referenced by compute_pkt_fields().

static int match_format	(	const char *	name,
		const char *	names
	)			`[static]`

Definition at line 183 of file utils.c.

Referenced by av_find_input_format().

int64_t parse_date	(	const char *	datestr,
		int	duration
	)

Parse datestr and return a corresponding number of microseconds.

Parameters:

datestr

String representing a date or a duration. See av_parse_time() for the syntax of the provided string.

Deprecated:: in favor of av_parse_time()

Definition at line 3763 of file utils.c.

static void pkt_dump_internal	(	void *	avcl,
		FILE *	f,
		int	level,
		AVPacket *	pkt,
		int	dump_payload,
		AVRational	time_base
	)			`[static]`

Definition at line 3874 of file utils.c.

Referenced by av_pkt_dump(), av_pkt_dump2(), av_pkt_dump_log(), and av_pkt_dump_log2().

static void print_fps	(	double	d,
		const char *	postfix
	)			`[static]`

Definition at line 3571 of file utils.c.

Referenced by dump_stream_format().

static int read_frame_internal	(	AVFormatContext *	s,
		AVPacket *	pkt
	)			`[static]`

Definition at line 1170 of file utils.c.

Referenced by av_read_frame(), and avformat_find_stream_info().

static int seek_frame_byte	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	pos,
		int	flags
	)			`[static]`

Definition at line 1784 of file utils.c.

Referenced by av_seek_frame().

static int seek_frame_generic	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	timestamp,
		int	flags
	)			`[static]`

Definition at line 1809 of file utils.c.

static int set_codec_from_probe_data	(	AVFormatContext *	s,
		AVStream *	st,
		AVProbeData *	pd
	)			`[static]`

Definition at line 386 of file utils.c.

Referenced by av_read_packet().

static int tb_unreliable ( AVCodecContext * c ) [static]

Definition at line 2350 of file utils.c.

Referenced by avformat_find_stream_info().

static int try_decode_frame	(	AVStream *	st,
		AVPacket *	avpkt,
		AVDictionary **	options
	)			`[static]`

Definition at line 2229 of file utils.c.

Referenced by avformat_find_stream_info().

static void update_initial_durations	(	AVFormatContext *	s,
		AVStream *	st,
		AVPacket *	pkt
	)			`[static]`

Definition at line 976 of file utils.c.

Referenced by compute_pkt_fields().

static void update_initial_timestamps	(	AVFormatContext *	s,
		int	stream_index,
		int64_t	dts,
		int64_t	pts
	)			`[static]`

Definition at line 947 of file utils.c.

Referenced by compute_pkt_fields().

static void update_stream_timings ( AVFormatContext * ic ) [static]

Estimate the stream timings from the one of each components.

Also computes the global bitrate if possible.

Definition at line 1971 of file utils.c.

Referenced by estimate_timings(), and fill_all_stream_timings().

static int validate_codec_tag	(	AVFormatContext *	s,
		AVStream *	st
	)			`[static]`

Check that tag + id is in the table If neither is in the table -> OK If tag is in the table with another id -> FAIL If id is in the table with another tag -> FAIL unless strict < normal

Definition at line 3035 of file utils.c.

Referenced by avformat_write_header().

Variable Documentation

AVInputFormat* first_iformat = NULL [static]

head of registered input format linked list

Definition at line 122 of file utils.c.

AVOutputFormat* first_oformat = NULL [static]

head of registered output format linked list

Definition at line 124 of file utils.c.


Defines
#define	LICENSE_PREFIX "libavformat license: "
#define	PROBE_BUF_MIN 2048
	size of probe buffer, for guessing file type from file contents
#define	PROBE_BUF_MAX (1<<20)
#define	DURATION_MAX_READ_SIZE 250000
#define	DURATION_MAX_RETRY 3
#define	CHUNK_START 0x1000
#define	PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
#define	PRINT(...) do { if (!f) av_log(avcl, level, __VA_ARGS__); else fprintf(f, __VA_ARGS__); } while(0)
Functions
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.
static void	frac_init (AVFrac *f, int64_t val, int64_t num, int64_t den)
	f = val + (num / den) + 0.5.
static void	frac_add (AVFrac *f, int64_t incr)
	Fractional addition to f: f = f + (incr / f->den).
AVInputFormat *	av_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.
AVOutputFormat *	av_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.
void	av_register_input_format (AVInputFormat *format)
void	av_register_output_format (AVOutputFormat *format)
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.
static int	match_format (const char name, const char names)
AVOutputFormat *	av_guess_format (const char short_name, const char filename, const char *mime_type)
	Return the output format in the list of registered output formats which best matches the provided parameters, or return NULL if there is no match.
enum 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.
AVInputFormat *	av_find_input_format (const char *short_name)
	Find AVInputFormat based on the short name of the input format.
int	ffio_limit (AVIOContext *s, int size)
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.
int	av_filename_number_test (const char *filename)
	Check whether filename actually is a numbered sequence generator.
AVInputFormat *	av_probe_input_format3 (AVProbeData pd, int is_opened, int score_ret)
	Guess the file format.
AVInputFormat *	av_probe_input_format2 (AVProbeData pd, int is_opened, int score_max)
	Guess the file format.
AVInputFormat *	av_probe_input_format (AVProbeData *pd, int is_opened)
	Guess the file format.
static int	set_codec_from_probe_data (AVFormatContext s, AVStream st, AVProbeData *pd)
static AVDictionary *	convert_format_parameters (AVFormatParameters *ap)
int	av_open_input_stream (AVFormatContext *ic_ptr, AVIOContext pb, const char filename, AVInputFormat fmt, AVFormatParameters *ap)
	Open a media file from an IO stream.
int	av_demuxer_open (AVFormatContext ic, AVFormatParameters ap)
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	av_open_input_file (AVFormatContext *ic_ptr, const char filename, AVInputFormat fmt, int buf_size, AVFormatParameters ap)
	Open a media file as input.
static int	init_input (AVFormatContext s, const char filename, AVDictionary **options)
int	avformat_open_input (AVFormatContext *ps, const char filename, AVInputFormat fmt, AVDictionary *options)
	Open an input stream and read the header.
static AVPacket *	add_to_pktbuf (AVPacketList *packet_buffer, AVPacket pkt, AVPacketList **plast_pktl)
int	av_read_packet (AVFormatContext s, AVPacket pkt)
	Read a transport packet from a media file.
static int	get_audio_frame_size (AVCodecContext *enc, int size)
	Get the number of samples of an audio frame.
static void	compute_frame_duration (int pnum, int pden, AVStream st, AVCodecParserContext pc, AVPacket *pkt)
	Return the frame duration in seconds.
static int	is_intra_only (AVCodecContext *enc)
static void	update_initial_timestamps (AVFormatContext *s, int stream_index, int64_t dts, int64_t pts)
static void	update_initial_durations (AVFormatContext s, AVStream st, AVPacket *pkt)
static void	compute_pkt_fields (AVFormatContext s, AVStream st, AVCodecParserContext pc, AVPacket pkt)
static int	read_frame_internal (AVFormatContext s, AVPacket pkt)
int	av_read_frame (AVFormatContext s, AVPacket pkt)
	Return the next frame of a stream.
static void	flush_packet_queue (AVFormatContext *s)
int	av_find_default_stream_index (AVFormatContext *s)
void	ff_read_frame_flush (AVFormatContext *s)
	Flush the frame reader.
void	av_update_cur_dts (AVFormatContext s, AVStream ref_st, int64_t timestamp)
void	ff_update_cur_dts (AVFormatContext s, AVStream ref_st, int64_t timestamp)
	Update cur_dts of all streams based on the given timestamp and AVStream.
void	ff_reduce_index (AVFormatContext *s, int stream_index)
	Ensure the index uses less memory than the maximum specified in AVFormatContext.max_index_size by discarding entries if it grows too large.
int	ff_add_index_entry (AVIndexEntry *index_entries, int nb_index_entries, unsigned int *index_entries_allocated_size, int64_t pos, int64_t timestamp, int size, int distance, int flags)
	Internal version of av_add_index_entry.
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.
int	ff_index_search_timestamp (const AVIndexEntry *entries, int nb_entries, int64_t wanted_timestamp, int flags)
	Internal version of av_index_search_timestamp.
int	av_index_search_timestamp (AVStream *st, int64_t wanted_timestamp, int flags)
	Get the index for a specific timestamp.
int	av_seek_frame_binary (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
int	ff_seek_frame_binary (AVFormatContext *s, int stream_index, int64_t target_ts, int flags)
	Perform a binary search using av_index_search_timestamp() and AVInputFormat.read_timestamp().
int64_t	av_gen_search (AVFormatContext s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t ts_ret, int64_t(read_timestamp)(struct AVFormatContext , int, int64_t *, int64_t))
int64_t	ff_gen_search (AVFormatContext s, int stream_index, int64_t target_ts, int64_t pos_min, int64_t pos_max, int64_t pos_limit, int64_t ts_min, int64_t ts_max, int flags, int64_t ts_ret, int64_t(read_timestamp)(struct AVFormatContext , int, int64_t *, int64_t))
	Perform a binary search using read_timestamp().
static int	seek_frame_byte (AVFormatContext *s, int stream_index, int64_t pos, int flags)
static int	seek_frame_generic (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
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.
static int	has_duration (AVFormatContext *ic)
	Return TRUE if the stream has accurate duration in any stream.
static void	update_stream_timings (AVFormatContext *ic)
	Estimate the stream timings from the one of each components.
static void	fill_all_stream_timings (AVFormatContext *ic)
static void	estimate_timings_from_bit_rate (AVFormatContext *ic)
static void	estimate_timings_from_pts (AVFormatContext *ic, int64_t old_offset)
static void	estimate_timings (AVFormatContext *ic, int64_t old_offset)
static int	has_codec_parameters (AVCodecContext *avctx)
static int	has_decode_delay_been_guessed (AVStream *st)
static int	try_decode_frame (AVStream st, AVPacket avpkt, AVDictionary **options)
unsigned int	ff_codec_get_tag (const AVCodecTag *tags, enum CodecID id)
enum CodecID	ff_codec_get_id (const AVCodecTag *tags, unsigned int tag)
unsigned int	av_codec_get_tag (const AVCodecTag const tags, enum CodecID id)
enum CodecID	av_codec_get_id (const AVCodecTag const tags, unsigned int tag)
static void	compute_chapters_end (AVFormatContext *s)
static int	get_std_framerate (int i)
static int	tb_unreliable (AVCodecContext *c)
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.
AVProgram *	av_find_program_from_stream (AVFormatContext ic, AVProgram last, int s)
	Find the programs which belong to a given stream.
int	av_find_best_stream (AVFormatContext ic, enum AVMediaType type, int wanted_stream_nb, int related_stream, AVCodec *decoder_ret, int flags)
	Find the "best" stream in the file.
int	av_read_play (AVFormatContext *s)
	Start playing a network-based stream (e.g.
int	av_read_pause (AVFormatContext *s)
	Pause a network-based stream (e.g.
void	av_close_input_stream (AVFormatContext *s)
	Free a AVFormatContext allocated by av_open_input_stream.
void	avformat_free_context (AVFormatContext *s)
	Free an AVFormatContext and all its streams.
void	av_close_input_file (AVFormatContext *s)
void	avformat_close_input (AVFormatContext **ps)
	Close an opened input AVFormatContext.
AVStream *	av_new_stream (AVFormatContext *s, int id)
	Add a new stream to a media file.
AVStream *	avformat_new_stream (AVFormatContext s, AVCodec c)
	Add a new stream to a media file.
AVProgram *	av_new_program (AVFormatContext *ac, int id)
AVChapter *	avpriv_new_chapter (AVFormatContext s, int id, AVRational time_base, int64_t start, int64_t end, const char title)
	Add a new chapter.
int	av_set_parameters (AVFormatContext s, AVFormatParameters ap)
int	avformat_alloc_output_context2 (AVFormatContext *avctx, AVOutputFormat oformat, const char format, const char filename)
	Allocate an AVFormatContext for an output format.
AVFormatContext *	avformat_alloc_output_context (const char format, AVOutputFormat oformat, const char *filename)
static int	validate_codec_tag (AVFormatContext s, AVStream st)
int	av_write_header (AVFormatContext *s)
	Allocate the stream private data and write the stream header to an output media file.
int	avformat_write_header (AVFormatContext s, AVDictionary *options)
	Allocate the stream private data and write the stream header to an output media file.
static int	compute_pkt_fields2 (AVFormatContext s, AVStream st, AVPacket *pkt)
int	av_write_frame (AVFormatContext s, AVPacket pkt)
	Write a packet to an output media file.
int	ff_interleave_add_packet (AVFormatContext s, AVPacket pkt, int(compare)(AVFormatContext , AVPacket , AVPacket ))
	Add packet to AVFormatContext->packet_buffer list, determining its interleaved position using compare() function argument.
static int	ff_interleave_compare_dts (AVFormatContext s, AVPacket next, AVPacket *pkt)
int	av_interleave_packet_per_dts (AVFormatContext s, AVPacket out, AVPacket *pkt, int flush)
	Interleave a packet per dts in an output media file.
static int	interleave_packet (AVFormatContext s, AVPacket out, AVPacket *in, int flush)
	Interleave an AVPacket correctly so it can be muxed.
int	av_interleaved_write_frame (AVFormatContext s, AVPacket pkt)
	Write a packet to an output media file ensuring correct interleaving.
int	av_write_trailer (AVFormatContext *s)
	Write the stream trailer to an output media file and free the file private data.
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	ff_program_add_stream_index (AVFormatContext *ac, int progid, unsigned int idx)
static void	print_fps (double d, const char *postfix)
static void	dump_metadata (void ctx, AVDictionary m, const char *indent)
static void	dump_stream_format (AVFormatContext *ic, int i, int index, int is_output)
void	dump_format (AVFormatContext ic, int index, const char url, int is_output)
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.
uint64_t	ff_ntp_time (void)
	Get the current time since NTP epoch in microseconds.
int64_t	parse_date (const char *timestr, int duration)
	Parse datestr and return a corresponding number of microseconds.
int	find_info_tag (char arg, int arg_size, const char tag1, const char *info)
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.
static void	hex_dump_internal (void avcl, FILE f, int level, uint8_t *buf, int size)
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.
static void	pkt_dump_internal (void avcl, FILE f, int level, AVPacket *pkt, int dump_payload, AVRational time_base)
void	av_pkt_dump (FILE f, AVPacket pkt, int dump_payload)
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_log (void avcl, int level, AVPacket pkt, int dump_payload)
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.
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.
char *	ff_data_to_hex (char buff, const uint8_t src, int s, int lowercase)
int	ff_hex_to_data (uint8_t data, const char p)
	Parse a string of hexadecimal strings.
void	av_set_pts_info (AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
void	avpriv_set_pts_info (AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
	Set the pts for a given stream.
int	ff_url_join (char str, int size, const char proto, const char authorization, const char hostname, int port, const char *fmt,...)
int	ff_write_chained (AVFormatContext dst, int dst_stream, AVPacket pkt, AVFormatContext *src)
	Write a packet to another muxer than the one the user originally intended.
void	ff_parse_key_value (const char str, ff_parse_key_val_cb callback_get_buf, void context)
	Parse a string with comma-separated key=value pairs.
int	ff_find_stream_index (AVFormatContext *s, int id)
	Find stream index based on format-specific stream ID.
void	ff_make_absolute_url (char buf, int size, const char base, const char *rel)
int64_t	ff_iso8601_to_unix_time (const char *datestr)
	Convert a date string in ISO8601 format to Unix timestamp.
int	avformat_query_codec (AVOutputFormat *ofmt, enum CodecID codec_id, int std_compliance)
	Test if the given container can store a codec.
int	avformat_network_init (void)
	Do global initialization of network components.
int	avformat_network_deinit (void)
	Undo the initialization done by avformat_network_init.
Variables
static AVInputFormat *	first_iformat = NULL
	head of registered input format linked list
static AVOutputFormat *	first_oformat = NULL
	head of registered output format linked list