ffmpeg.c File Reference

multimedia converter based on the FFmpeg libraries More...

#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswresample/swresample.h"
#include "libavutil/opt.h"
#include "libavutil/channel_layout.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/fifo.h"
#include "libavutil/internal.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavutil/imgutils.h"
#include "libavutil/timestamp.h"
#include "libavutil/bprint.h"
#include "libavutil/time.h"
#include "libavutil/threadmessage.h"
#include "libavcodec/mathops.h"
#include "libavformat/os_support.h"
#include "libavfilter/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersrc.h"
#include "libavfilter/buffersink.h"
#include "ffmpeg.h"
#include "cmdutils.h"
#include "libavutil/avassert.h"

Go to the source code of this file.

Functions
static void	do_video_stats (OutputStream *ost, int frame_size)
static int64_t	getutime (void)
static int64_t	getmaxrss (void)
static int	sub2video_get_blank_frame (InputStream *ist)
static void	sub2video_copy_rect (uint8_t *dst, int dst_linesize, int w, int h, AVSubtitleRect *r)
static void	sub2video_push_ref (InputStream *ist, int64_t pts)
static void	sub2video_update (InputStream *ist, AVSubtitle *sub)
static void	sub2video_heartbeat (InputStream *ist, int64_t pts)
static void	sub2video_flush (InputStream *ist)
static void	term_exit_sigsafe (void)
void	term_exit (void)
static void	sigterm_handler (int sig)
void	term_init (void)
static int	read_key (void)
static int	decode_interrupt_cb (void *ctx)
static void	ffmpeg_cleanup (int ret)
void	remove_avoptions (AVDictionary **a, AVDictionary *b)
void	assert_avoptions (AVDictionary *m)
static void	abort_codec_experimental (AVCodec *c, int encoder)
static void	update_benchmark (const char *fmt,...)
static void	close_all_output_streams (OutputStream *ost, OSTFinished this_stream, OSTFinished others)
static void	write_frame (AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
static void	close_output_stream (OutputStream *ost)
static int	check_recording_time (OutputStream *ost)
static void	do_audio_out (AVFormatContext *s, OutputStream *ost, AVFrame *frame)
static void	do_subtitle_out (AVFormatContext *s, OutputStream *ost, InputStream *ist, AVSubtitle *sub)
static void	do_video_out (AVFormatContext *s, OutputStream *ost, AVFrame *next_picture, double sync_ipts)
static double	psnr (double d)
static void	finish_output_stream (OutputStream *ost)
static int	reap_filters (int flush)
	Get and encode new output from any of the filtergraphs, without causing activity. More...
static void	print_final_stats (int64_t total_size)
static void	print_report (int is_last_report, int64_t timer_start, int64_t cur_time)
static void	flush_encoders (void)
static int	check_output_constraints (InputStream *ist, OutputStream *ost)
static void	do_streamcopy (InputStream *ist, OutputStream *ost, const AVPacket *pkt)
int	guess_input_channel_layout (InputStream *ist)
static int	decode_audio (InputStream *ist, AVPacket *pkt, int *got_output)
static int	decode_video (InputStream *ist, AVPacket *pkt, int *got_output)
static int	transcode_subtitles (InputStream *ist, AVPacket *pkt, int *got_output)
static int	send_filter_eof (InputStream *ist)
static int	process_input_packet (InputStream *ist, const AVPacket *pkt)
static void	print_sdp (void)
static const HWAccel *	get_hwaccel (enum AVPixelFormat pix_fmt)
static enum AVPixelFormat	get_format (AVCodecContext *s, const enum AVPixelFormat *pix_fmts)
static int	get_buffer (AVCodecContext *s, AVFrame *frame, int flags)
static int	init_input_stream (int ist_index, char *error, int error_len)
static InputStream *	get_input_stream (OutputStream *ost)
static int	compare_int64 (const void *a, const void *b)
static int	init_output_stream (OutputStream *ost, char *error, int error_len)
static void	parse_forced_key_frames (char *kf, OutputStream *ost, AVCodecContext *avctx)
static void	report_new_stream (int input_index, AVPacket *pkt)
static void	set_encoder_id (OutputFile *of, OutputStream *ost)
static int	transcode_init (void)
static int	need_output (void)
static OutputStream *	choose_output (void)
	Select the output stream to process. More...
static int	check_keyboard_interaction (int64_t cur_time)
static int	get_input_packet (InputFile *f, AVPacket *pkt)
static int	got_eagain (void)
static void	reset_eagain (void)
static int	process_input (int file_index)
static int	transcode_from_filter (FilterGraph *graph, InputStream **best_ist)
	Perform a step of transcoding for the specified filter graph. More...
static int	transcode_step (void)
	Run a single step of transcoding. More...
static int	transcode (void)
static void	log_callback_null (void *ptr, int level, const char *fmt, va_list vl)
int	main (int argc, char **argv)

Variables
const char	program_name [] = "ffmpeg"
	program name, defined by the program for show_version(). More...
const int	program_birth_year = 2000
	program birth year, defined by the program for show_banner() More...
static FILE *	vstats_file
const char *const	forced_keyframes_const_names []
static int	run_as_daemon = 0
static int	nb_frames_dup = 0
static int	nb_frames_drop = 0
static int64_t	decode_error_stat [2]
static int	current_time
AVIOContext *	progress_avio = NULL
static uint8_t *	subtitle_out
InputStream **	input_streams = NULL
int	nb_input_streams = 0
InputFile **	input_files = NULL
int	nb_input_files = 0
OutputStream **	output_streams = NULL
int	nb_output_streams = 0
OutputFile **	output_files = NULL
int	nb_output_files = 0
FilterGraph **	filtergraphs
int	nb_filtergraphs
static volatile int	received_sigterm = 0
static volatile int	received_nb_signals = 0
static volatile int	transcode_init_done = 0
static volatile int	ffmpeg_exited = 0
static int	main_return_code = 0
const AVIOInterruptCB	int_cb = { decode_interrupt_cb, NULL }

Detailed Description

multimedia converter based on the FFmpeg libraries

Definition in file ffmpeg.c.

Function Documentation

static void do_video_stats ( OutputStream *  ost, int  frame_size  )

static

Definition at line 1260 of file ffmpeg.c.

Referenced by do_video_out(), and flush_encoders().

static int64_t getutime ( void  )

static

Definition at line 4071 of file ffmpeg.c.

Referenced by main(), and update_benchmark().

static int64_t getmaxrss ( void  )

static

Definition at line 4089 of file ffmpeg.c.

Referenced by ffmpeg_cleanup().

static int sub2video_get_blank_frame ( InputStream *  ist )

static

Definition at line 169 of file ffmpeg.c.

Referenced by sub2video_update().

static void sub2video_copy_rect ( uint8_t *  dst, int  dst_linesize, int  w, int  h, AVSubtitleRect *  r  )

static

Definition at line 184 of file ffmpeg.c.

Referenced by sub2video_update().

static void sub2video_push_ref ( InputStream *  ist, int64_t  pts  )

static

Definition at line 215 of file ffmpeg.c.

Referenced by sub2video_heartbeat(), and sub2video_update().

static void sub2video_update ( InputStream *  ist, AVSubtitle *  sub  )

static

Definition at line 228 of file ffmpeg.c.

Referenced by sub2video_flush(), sub2video_heartbeat(), and transcode_subtitles().

static void sub2video_heartbeat ( InputStream *  ist, int64_t  pts  )

static

Definition at line 262 of file ffmpeg.c.

Referenced by process_input().

static void sub2video_flush ( InputStream *  ist )

static

Definition at line 291 of file ffmpeg.c.

Referenced by transcode_subtitles().

static void term_exit_sigsafe ( void  )

static

Definition at line 303 of file ffmpeg.c.

Referenced by sigterm_handler(), and term_exit().

void term_exit

(

void

)

Definition at line 311 of file ffmpeg.c.

Referenced by assert_file_overwrite(), ffmpeg_cleanup(), and transcode().

static void sigterm_handler ( int  sig )

static

Definition at line 324 of file ffmpeg.c.

Referenced by term_init().

void term_init

(

void

)

Definition at line 369 of file ffmpeg.c.

Referenced by assert_file_overwrite(), and main().

static int read_key ( void  )

static

Definition at line 408 of file ffmpeg.c.

Referenced by check_keyboard_interaction().

static int decode_interrupt_cb ( void *  ctx )

static

Definition at line 459 of file ffmpeg.c.

static void ffmpeg_cleanup ( int  ret )

static

Definition at line 466 of file ffmpeg.c.

Referenced by main().

void remove_avoptions	(	AVDictionary **	a,
		AVDictionary *	b
	)

Definition at line 587 of file ffmpeg.c.

Referenced by open_input_file().

void assert_avoptions

(

AVDictionary *

m

)

Definition at line 596 of file ffmpeg.c.

Referenced by init_input_stream(), init_output_stream(), and open_input_file().

static void abort_codec_experimental ( AVCodec *  c, int  encoder  )

static

Definition at line 605 of file ffmpeg.c.

Referenced by init_input_stream(), and init_output_stream().

static void update_benchmark ( const char *  fmt,   ...  )

static

Definition at line 610 of file ffmpeg.c.

Referenced by decode_audio(), decode_video(), do_audio_out(), do_video_out(), and flush_encoders().

static void close_all_output_streams ( OutputStream *  ost, OSTFinished  this_stream, OSTFinished  others  )

static

Definition at line 627 of file ffmpeg.c.

Referenced by write_frame().

static void write_frame ( AVFormatContext *  s, AVPacket *  pkt, OutputStream *  ost  )

static

Definition at line 636 of file ffmpeg.c.

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

static void close_output_stream ( OutputStream *  ost )

static

Definition at line 796 of file ffmpeg.c.

Referenced by check_recording_time(), do_streamcopy(), need_output(), and transcode_from_filter().

static int check_recording_time ( OutputStream *  ost )

static

Definition at line 807 of file ffmpeg.c.

Referenced by do_audio_out(), do_subtitle_out(), and do_video_out().

static void do_audio_out ( AVFormatContext *  s, OutputStream *  ost, AVFrame *  frame  )

static

Definition at line 820 of file ffmpeg.c.

Referenced by reap_filters().

static void do_subtitle_out ( AVFormatContext *  s, OutputStream *  ost, InputStream *  ist, AVSubtitle *  sub  )

static

Definition at line 869 of file ffmpeg.c.

Referenced by transcode_subtitles().

static void do_video_out ( AVFormatContext *  s, OutputStream *  ost, AVFrame *  next_picture, double  sync_ipts  )

static

Definition at line 953 of file ffmpeg.c.

Referenced by reap_filters().

static double psnr ( double  d )

static

Definition at line 1255 of file ffmpeg.c.

Referenced by avfilter_register_all(), do_video_stats(), main(), print_report(), and run_psnr().

static void finish_output_stream ( OutputStream *  ost )

static

Definition at line 1298 of file ffmpeg.c.

Referenced by process_input().

static int reap_filters ( int  flush )

static

Get and encode new output from any of the filtergraphs, without causing activity.

Returns

0 for success, <0 for severe errors

Definition at line 1317 of file ffmpeg.c.

Referenced by transcode_from_filter(), and transcode_step().

static void print_final_stats ( int64_t  total_size )

static

Definition at line 1412 of file ffmpeg.c.

Referenced by print_report().

static void print_report ( int  is_last_report, int64_t  timer_start, int64_t  cur_time  )

static

Definition at line 1529 of file ffmpeg.c.

Referenced by transcode().

static void flush_encoders ( void  )

static

Definition at line 1705 of file ffmpeg.c.

Referenced by transcode().

static int check_output_constraints ( InputStream *  ist, OutputStream *  ost  )

static

Definition at line 1785 of file ffmpeg.c.

Referenced by process_input_packet(), and transcode_subtitles().

static void do_streamcopy ( InputStream *  ist, OutputStream *  ost, const AVPacket *  pkt  )

static

Definition at line 1802 of file ffmpeg.c.

Referenced by process_input_packet().

int guess_input_channel_layout

(

InputStream *

ist

)

Definition at line 1914 of file ffmpeg.c.

Referenced by add_input_streams(), and decode_audio().

static int decode_audio ( InputStream *  ist, AVPacket *  pkt, int *  got_output  )

static

Definition at line 1934 of file ffmpeg.c.

Referenced by process_input_packet().

static int decode_video ( InputStream *  ist, AVPacket *  pkt, int *  got_output  )

static

Definition at line 2062 of file ffmpeg.c.

Referenced by process_input_packet().

static int transcode_subtitles ( InputStream *  ist, AVPacket *  pkt, int *  got_output  )

static

Definition at line 2202 of file ffmpeg.c.

Referenced by process_input_packet().

static int send_filter_eof ( InputStream *  ist )

static

Definition at line 2265 of file ffmpeg.c.

Referenced by process_input_packet().

static int process_input_packet ( InputStream *  ist, const AVPacket *  pkt  )

static

Definition at line 2277 of file ffmpeg.c.

Referenced by process_input(), and transcode().

static void print_sdp ( void  )

static

Definition at line 2433 of file ffmpeg.c.

static const HWAccel* get_hwaccel ( enum AVPixelFormat  pix_fmt )

static

Definition at line 2468 of file ffmpeg.c.

Referenced by get_format().

static enum AVPixelFormat get_format ( AVCodecContext *  s, const enum AVPixelFormat *  pix_fmts  )

static

Definition at line 2477 of file ffmpeg.c.

Referenced by init_input_stream().

static int get_buffer ( AVCodecContext *  s, AVFrame *  frame, int  flags  )

static

Definition at line 2515 of file ffmpeg.c.

Referenced by init_input_stream().

static int init_input_stream ( int  ist_index, char *  error, int  error_len  )

static

Definition at line 2525 of file ffmpeg.c.

static InputStream* get_input_stream ( OutputStream *  ost )

static

Definition at line 2572 of file ffmpeg.c.

Referenced by init_output_stream(), and transcode_init().

static int compare_int64 ( const void *  a, const void *  b  )

static

Definition at line 2579 of file ffmpeg.c.

Referenced by parse_forced_key_frames().

static int init_output_stream ( OutputStream *  ost, char *  error, int  error_len  )

static

Definition at line 2585 of file ffmpeg.c.

static void parse_forced_key_frames ( char *  kf, OutputStream *  ost, AVCodecContext *  avctx  )

static

Definition at line 2655 of file ffmpeg.c.

Referenced by transcode_init().

static void report_new_stream ( int  input_index, AVPacket *  pkt  )

static

Definition at line 2718 of file ffmpeg.c.

Referenced by process_input().

static void set_encoder_id ( OutputFile *  of, OutputStream *  ost  )

static

Definition at line 2733 of file ffmpeg.c.

Referenced by transcode_init().

static int transcode_init ( void  )

static

Definition at line 2774 of file ffmpeg.c.

Referenced by transcode().

static int need_output ( void  )

static

Definition at line 3332 of file ffmpeg.c.

Referenced by transcode().

static OutputStream* choose_output ( void  )

static

Select the output stream to process.

Returns

selected output stream, or NULL if none available

Definition at line 3362 of file ffmpeg.c.

Referenced by transcode_step().

static int check_keyboard_interaction ( int64_t  cur_time )

static

Definition at line 3380 of file ffmpeg.c.

Referenced by transcode().

static int get_input_packet ( InputFile *  f, AVPacket *  pkt  )

static

Definition at line 3585 of file ffmpeg.c.

Referenced by process_input().

static int got_eagain ( void  )

static

Definition at line 3605 of file ffmpeg.c.

Referenced by transcode_step().

static void reset_eagain ( void  )

static

Definition at line 3614 of file ffmpeg.c.

Referenced by process_input(), and transcode_step().

static int process_input ( int  file_index )

static

Definition at line 3630 of file ffmpeg.c.

Referenced by transcode_step().

static int transcode_from_filter ( FilterGraph *  graph, InputStream **  best_ist  )

static

Perform a step of transcoding for the specified filter graph.

Parameters

[in]	graph	filter graph to consider
[out]	best_ist	input stream where a frame would allow to continue

Returns

0 for success, <0 for error

Definition at line 3856 of file ffmpeg.c.

Referenced by transcode_step().

static int transcode_step ( void  )

static

Run a single step of transcoding.

Returns

0 for success, <0 for error

Definition at line 3902 of file ffmpeg.c.

Referenced by transcode().

static int transcode ( void  )

static

Definition at line 3945 of file ffmpeg.c.

Referenced by main().

static void log_callback_null ( void *  ptr, int  level, const char *  fmt, va_list  vl  )

static

Definition at line 4107 of file ffmpeg.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 4111 of file ffmpeg.c.

Variable Documentation

const char program_name[] = "ffmpeg"

program name, defined by the program for show_version().

Definition at line 112 of file ffmpeg.c.

Referenced by main().

const int program_birth_year = 2000

program birth year, defined by the program for show_banner()

Definition at line 113 of file ffmpeg.c.

FILE* vstats_file

static

Definition at line 115 of file ffmpeg.c.

Referenced by do_video_stats(), and ffmpeg_cleanup().

const char* const forced_keyframes_const_names[]

Initial value:

= {
    "n",
    "n_forced",
    "prev_forced_n",
    "prev_forced_t",
    "t",
    NULL
}

Definition at line 117 of file ffmpeg.c.

Referenced by transcode_init().

int run_as_daemon = 0

static

Definition at line 130 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), main(), and term_init().

int nb_frames_dup = 0

static

Definition at line 131 of file ffmpeg.c.

Referenced by do_video_out(), and print_report().

int nb_frames_drop = 0

static

Definition at line 132 of file ffmpeg.c.

Referenced by do_video_out(), and print_report().

int64_t decode_error_stat[2]

static

Definition at line 133 of file ffmpeg.c.

Referenced by decode_audio(), decode_video(), main(), and transcode_subtitles().

int current_time

static

Definition at line 135 of file ffmpeg.c.

Referenced by main(), and update_benchmark().

AVIOContext* progress_avio = NULL

Definition at line 136 of file ffmpeg.c.

Referenced by opt_progress().

uint8_t* subtitle_out

static

Definition at line 138 of file ffmpeg.c.

Referenced by do_subtitle_out(), and ffmpeg_cleanup().

InputStream** input_streams = NULL

Definition at line 140 of file ffmpeg.c.

Referenced by add_input_streams(), init_input_filter(), new_audio_stream(), new_output_stream(), open_input_file(), and open_output_file().

int nb_input_streams = 0

Definition at line 141 of file ffmpeg.c.

Referenced by add_input_streams(), check_keyboard_interaction(), ffmpeg_cleanup(), init_input_filter(), open_input_file(), open_output_file(), transcode(), and transcode_init().

InputFile** input_files = NULL

Definition at line 142 of file ffmpeg.c.

Referenced by configure_input_audio_filter(), configure_input_video_filter(), init_input_filter(), open_input_file(), open_output_file(), opt_map(), opt_map_channel(), opt_target(), and sub2video_prepare().

int nb_input_files = 0

Definition at line 143 of file ffmpeg.c.

Referenced by add_input_streams(), dump_attachment(), ffmpeg_cleanup(), init_input_filter(), open_input_file(), open_output_file(), opt_map(), opt_map_channel(), opt_target(), print_final_stats(), reset_eagain(), and transcode_init().

OutputStream** output_streams = NULL

Definition at line 145 of file ffmpeg.c.

Referenced by new_output_stream(), and open_output_file().

int nb_output_streams = 0

Definition at line 146 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), choose_output(), close_all_output_streams(), ffmpeg_cleanup(), flush_encoders(), got_eagain(), need_output(), new_output_stream(), open_output_file(), print_final_stats(), print_report(), process_input(), process_input_packet(), reap_filters(), reset_eagain(), transcode(), transcode_init(), and transcode_subtitles().

OutputFile** output_files = NULL

Definition at line 147 of file ffmpeg.c.

Referenced by configure_output_audio_filter(), configure_output_video_filter(), and open_output_file().

int nb_output_files = 0

Definition at line 148 of file ffmpeg.c.

Referenced by ffmpeg_cleanup(), get_ost_filters(), new_output_stream(), open_output_file(), print_final_stats(), print_sdp(), and transcode().

FilterGraph** filtergraphs

Definition at line 150 of file ffmpeg.c.

Referenced by configure_complex_filters(), DEF_CHOOSE_FORMAT(), init_complex_filters(), open_output_file(), opt_filter_complex(), and opt_filter_complex_script().

int nb_filtergraphs

Definition at line 151 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), configure_complex_filters(), decode_audio(), decode_video(), DEF_CHOOSE_FORMAT(), ffmpeg_cleanup(), init_complex_filters(), open_output_file(), opt_filter_complex(), opt_filter_complex_script(), and transcode_init().

volatile int received_sigterm = 0

static

Definition at line 317 of file ffmpeg.c.

Referenced by ffmpeg_cleanup(), sigterm_handler(), and transcode().

volatile int received_nb_signals = 0

static

Definition at line 318 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), decode_interrupt_cb(), main(), and sigterm_handler().

volatile int transcode_init_done = 0

static

Definition at line 319 of file ffmpeg.c.

Referenced by decode_interrupt_cb(), and ffmpeg_cleanup().

volatile int ffmpeg_exited = 0

static

Definition at line 320 of file ffmpeg.c.

Referenced by ffmpeg_cleanup().

int main_return_code = 0

static

Definition at line 321 of file ffmpeg.c.

Referenced by main(), and write_frame().

const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL }

Definition at line 464 of file ffmpeg.c.

Referenced by dump_attachment(), get_preset_file_2(), open_input_file(), open_output_file(), opt_progress(), read_ffserver_streams(), and url_alloc_for_protocol().