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 "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libswresample/swresample.h"
#include "libavutil/opt.h"
#include "libavutil/audioconvert.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.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 "libavformat/os_support.h"
#include "libavformat/ffm.h"
#include "libavfilter/avcodec.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/avfiltergraph.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.

Defines
#define	DEFAULT_PASS_LOGFILENAME_PREFIX   "ffmpeg2pass"
Functions
static void	do_video_stats (AVFormatContext *os, OutputStream *ost, int frame_size)
static int64_t	getutime (void)
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)
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)
void av_noreturn	exit_program (int ret)
	Do all the necessary cleanup and abort.
void	assert_avoptions (AVDictionary *m)
static void	assert_codec_experimental (AVCodecContext *c, int encoder)
static void	update_benchmark (const char *fmt,...)
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	pre_process_video_frame (InputStream *ist, AVPicture *picture, void **bufp)
static void	do_subtitle_out (AVFormatContext *s, OutputStream *ost, InputStream *ist, AVSubtitle *sub)
static void	do_video_out (AVFormatContext *s, OutputStream *ost, AVFrame *in_picture, float quality)
static double	psnr (double d)
static int	reap_filters (void)
	Get and encode new output from any of the filtergraphs, without causing activity.
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)
static void	rate_emu_sleep (InputStream *ist)
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	output_packet (InputStream *ist, const AVPacket *pkt)
static void	print_sdp (void)
static int	init_input_stream (int ist_index, char *error, int error_len)
static InputStream *	get_input_stream (OutputStream *ost)
static void	parse_forced_key_frames (char *kf, OutputStream *ost, AVCodecContext *avctx)
static void	report_new_stream (int input_index, AVPacket *pkt)
static int	transcode_init (void)
static int	need_output (void)
static OutputStream *	choose_output (void)
	Select the output stream to process.
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.
static int	transcode_step (void)
	Run a single step of transcoding.
static int	transcode (void)
static int64_t	getmaxrss (void)
static void	log_callback_null (void *ptr, int level, const char *fmt, va_list vl)
static void	parse_cpuflags (int argc, char **argv, const OptionDef *options)
int	main (int argc, char **argv)
Variables
const char	program_name [] = "ffmpeg"
	program name, defined by the program for show_version().
const int	program_birth_year = 2000
	program birth year, defined by the program for show_banner()
static FILE *	vstats_file
static int	run_as_daemon = 0
static int64_t	video_size = 0
static int64_t	audio_size = 0
static int64_t	subtitle_size = 0
static int64_t	extra_size = 0
static int	nb_frames_dup = 0
static int	nb_frames_drop = 0
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
const AVIOInterruptCB	int_cb = { decode_interrupt_cb, NULL }

---

Detailed Description

multimedia converter based on the FFmpeg libraries

Definition in file ffmpeg.c.

---

Define Documentation

#define DEFAULT_PASS_LOGFILENAME_PREFIX   "ffmpeg2pass"

Definition at line 132 of file ffmpeg.c.

Referenced by transcode_init().

---

Function Documentation

void assert_avoptions

(

AVDictionary *

m

)

Definition at line 463 of file ffmpeg.c.

Referenced by init_input_stream(), opt_input_file(), and transcode_init().

static void assert_codec_experimental	(	AVCodecContext *	c,
		int	encoder
	)			[static]

Definition at line 472 of file ffmpeg.c.

Referenced by init_input_stream(), and transcode_init().

static int check_keyboard_interaction

(

int64_t

cur_time

)

[static]

Definition at line 2470 of file ffmpeg.c.

Referenced by transcode().

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

Definition at line 1316 of file ffmpeg.c.

Referenced by output_packet(), and transcode_subtitles().

static int check_recording_time

(

OutputStream *

ost

)

[static]

Definition at line 604 of file ffmpeg.c.

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

static OutputStream* choose_output

(

void

)

[static]

Select the output stream to process.

Returns:

selected output stream, or NULL if none available

Definition at line 2452 of file ffmpeg.c.

Referenced by transcode_step().

static void close_output_stream

(

OutputStream *

ost

)

[static]

Definition at line 592 of file ffmpeg.c.

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

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

Definition at line 1431 of file ffmpeg.c.

Referenced by output_packet().

static int decode_interrupt_cb

(

void *

ctx

)

[static]

Definition at line 374 of file ffmpeg.c.

Referenced by read_thread().

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

Definition at line 1553 of file ffmpeg.c.

Referenced by output_packet().

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

Definition at line 617 of file ffmpeg.c.

Referenced by reap_filters().

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

Definition at line 1330 of file ffmpeg.c.

Referenced by output_packet().

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

Definition at line 704 of file ffmpeg.c.

Referenced by transcode_subtitles().

static void do_video_out	(	AVFormatContext *	s,
		OutputStream *	ost,
		AVFrame *	in_picture,
		float	quality
	)			[static]

Definition at line 775 of file ffmpeg.c.

Referenced by reap_filters().

static void do_video_stats	(	AVFormatContext *	os,
		OutputStream *	ost,
		int	frame_size
	)			[static]

Definition at line 945 of file ffmpeg.c.

Referenced by do_video_out().

void av_noreturn exit_program

(

int

ret

)

Do all the necessary cleanup and abort.

This function is implemented in the avtools, not cmdutils.

Definition at line 381 of file ffmpeg.c.

static void flush_encoders

(

void

)

[static]

Definition at line 1240 of file ffmpeg.c.

Referenced by transcode().

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

Definition at line 2673 of file ffmpeg.c.

Referenced by process_input().

static InputStream* get_input_stream

(

OutputStream *

ost

)

[static]

Definition at line 1908 of file ffmpeg.c.

Referenced by transcode_init().

static int64_t getmaxrss

(

void

)

[static]

Definition at line 3087 of file ffmpeg.c.

Referenced by main().

static int64_t getutime

(

void

)

[static]

Definition at line 3069 of file ffmpeg.c.

Referenced by main(), and update_benchmark().

static int got_eagain

(

void

)

[static]

Definition at line 2682 of file ffmpeg.c.

Referenced by transcode_step().

int guess_input_channel_layout

(

InputStream *

ist

)

Definition at line 1413 of file ffmpeg.c.

Referenced by add_input_streams(), and decode_audio().

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

Definition at line 1871 of file ffmpeg.c.

Referenced by transcode_init().

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

Definition at line 3105 of file ffmpeg.c.

Referenced by main().

int main	(	int	argc,
		char **	argv
	)

Definition at line 3116 of file ffmpeg.c.

static int need_output

(

void

)

[static]

Returns:

1 if there are still streams where more output is wanted, 0 otherwise

Definition at line 2422 of file ffmpeg.c.

Referenced by transcode().

static int output_packet	(	InputStream *	ist,
		const AVPacket *	pkt
	)			[static]

Definition at line 1719 of file ffmpeg.c.

Referenced by mpeg_mux_end(), mpeg_mux_write_packet(), process_input(), and transcode().

static void parse_cpuflags	(	int	argc,
		char **	argv,
		const OptionDef *	options
	)			[static]

Definition at line 3109 of file ffmpeg.c.

Referenced by main().

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

Definition at line 1915 of file ffmpeg.c.

Referenced by transcode_init().

static void pre_process_video_frame	(	InputStream *	ist,
		AVPicture *	picture,
		void **	bufp
	)			[static]

Definition at line 665 of file ffmpeg.c.

Referenced by decode_video().

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

Definition at line 1068 of file ffmpeg.c.

Referenced by transcode().

static void print_sdp

(

void

)

[static]

Definition at line 1854 of file ffmpeg.c.

Referenced by transcode_init().

static int process_input

(

int

file_index

)

[static]

Returns:

• 0 -- one packet was read and processed
• AVERROR(EAGAIN) -- no packets were available for selected file, this function should be called again
• AVERROR_EOF -- this function should not be called again

Definition at line 2707 of file ffmpeg.c.

Referenced by transcode_step().

static double psnr

(

double

d

)

[static]

Definition at line 940 of file ffmpeg.c.

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

static void rate_emu_sleep

(

InputStream *

ist

)

[static]

Definition at line 1403 of file ffmpeg.c.

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

static int read_key

(

void

)

[static]

Definition at line 321 of file ffmpeg.c.

Referenced by check_keyboard_interaction().

static int reap_filters

(

void

)

[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 988 of file ffmpeg.c.

Referenced by transcode_from_filter(), and transcode_step().

static void report_new_stream	(	int	input_index,
		AVPacket *	pkt
	)			[static]

Definition at line 1946 of file ffmpeg.c.

Referenced by process_input().

static void reset_eagain

(

void

)

[static]

Definition at line 2691 of file ffmpeg.c.

Referenced by process_input(), and transcode_step().

static void sigterm_handler

(

int

sig

)

[static]

Definition at line 274 of file ffmpeg.c.

Referenced by main(), and term_init().

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

Definition at line 162 of file ffmpeg.c.

Referenced by sub2video_update().

static void sub2video_flush

(

InputStream *

ist

)

[static]

Definition at line 251 of file ffmpeg.c.

Referenced by transcode_subtitles().

static void sub2video_heartbeat	(	InputStream *	ist,
		int64_t	pts
	)			[static]

Definition at line 224 of file ffmpeg.c.

Referenced by process_input().

static void sub2video_push_ref	(	InputStream *	ist,
		int64_t	pts
	)			[static]

Definition at line 191 of file ffmpeg.c.

Referenced by sub2video_heartbeat(), and sub2video_update().

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

Definition at line 205 of file ffmpeg.c.

Referenced by transcode_subtitles().

void term_exit

(

void

)

Definition at line 261 of file ffmpeg.c.

Referenced by assert_file_overwrite(), sigterm_handler(), term_init(), and transcode().

void term_init

(

void

)

Definition at line 283 of file ffmpeg.c.

Referenced by assert_file_overwrite(), and main().

static int transcode

(

void

)

[static]

Definition at line 2951 of file ffmpeg.c.

Referenced by main().

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 2863 of file ffmpeg.c.

Referenced by transcode_step().

static int transcode_init

(

void

)

[static]

Definition at line 1961 of file ffmpeg.c.

Referenced by transcode().

static int transcode_step

(

void

)

[static]

Run a single step of transcoding.

Returns:

0 for success, <0 for error

Definition at line 2909 of file ffmpeg.c.

Referenced by transcode().

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

Definition at line 1671 of file ffmpeg.c.

Referenced by output_packet().

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

Definition at line 489 of file ffmpeg.c.

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

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

Definition at line 506 of file ffmpeg.c.

Referenced by alac_encode_frame(), do_audio_out(), do_streamcopy(), do_video_out(), flac_encode_frame(), and flush_encoders().

---

Variable Documentation

int64_t audio_size = 0 [static]

Definition at line 116 of file ffmpeg.c.

Referenced by bfi_read_packet(), bmv_read_packet(), cdxl_read_packet(), do_audio_out(), do_streamcopy(), flush_encoders(), print_report(), read_packet(), rl2_read_header(), rpl_read_header(), and sdl_audio_callback().

int current_time [static]

Definition at line 122 of file ffmpeg.c.

Referenced by main(), and update_benchmark().

int64_t extra_size = 0 [static]

Definition at line 118 of file ffmpeg.c.

Referenced by ape_read_packet(), asf_write_header1(), print_report(), and transcode_init().

FilterGraph** filtergraphs

Definition at line 144 of file ffmpeg.c.

Referenced by configure_complex_filters(), DEF_CHOOSE_FORMAT(), opt_filter_complex(), and opt_output_file().

InputFile** input_files = NULL

Definition at line 136 of file ffmpeg.c.

Referenced by init_input_filter(), opt_input_file(), opt_map(), opt_map_channel(), opt_output_file(), opt_target(), and sub2video_prepare().

InputStream** input_streams = NULL

Definition at line 134 of file ffmpeg.c.

Referenced by add_input_streams(), init_input_filter(), new_audio_stream(), new_output_stream(), and opt_output_file().

const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL }

Definition at line 379 of file ffmpeg.c.

Referenced by dump_attachment(), get_preset_file_2(), opt_input_file(), opt_output_file(), opt_progress(), and read_ffserver_streams().

int nb_filtergraphs

Definition at line 145 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), configure_complex_filters(), decode_audio(), decode_video(), DEF_CHOOSE_FORMAT(), exit_program(), opt_filter_complex(), opt_output_file(), and transcode_init().

int nb_frames_drop = 0 [static]

Definition at line 120 of file ffmpeg.c.

Referenced by do_video_out(), and print_report().

int nb_frames_dup = 0 [static]

Definition at line 119 of file ffmpeg.c.

Referenced by do_video_out(), and print_report().

int nb_input_files = 0

Definition at line 137 of file ffmpeg.c.

Referenced by add_input_streams(), dump_attachment(), exit_program(), init_input_filter(), opt_input_file(), opt_map(), opt_map_channel(), opt_output_file(), opt_target(), and transcode_init().

int nb_input_streams = 0

Definition at line 135 of file ffmpeg.c.

Referenced by add_input_streams(), check_keyboard_interaction(), exit_program(), init_input_filter(), opt_input_file(), opt_output_file(), transcode(), and transcode_init().

int nb_output_files = 0

Definition at line 142 of file ffmpeg.c.

Referenced by exit_program(), main(), new_output_stream(), opt_output_file(), print_sdp(), transcode(), and transcode_init().

int nb_output_streams = 0

Definition at line 140 of file ffmpeg.c.

Referenced by check_keyboard_interaction(), choose_output(), exit_program(), flush_encoders(), got_eagain(), need_output(), new_output_stream(), opt_output_file(), output_packet(), print_report(), process_input(), reap_filters(), reset_eagain(), transcode(), transcode_init(), and transcode_subtitles().

OutputFile** output_files = NULL

Definition at line 141 of file ffmpeg.c.

Referenced by opt_output_file().

OutputStream** output_streams = NULL

Definition at line 139 of file ffmpeg.c.

Referenced by new_output_stream(), and opt_output_file().

const int program_birth_year = 2000

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

Definition at line 107 of file ffmpeg.c.

const char program_name[] = "ffmpeg"

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

Definition at line 106 of file ffmpeg.c.

AVIOContext* progress_avio = NULL

Definition at line 123 of file ffmpeg.c.

Referenced by opt_progress().

volatile int received_nb_signals = 0 [static]

Definition at line 271 of file ffmpeg.c.

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

volatile int received_sigterm = 0 [static]

Definition at line 270 of file ffmpeg.c.

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

int run_as_daemon = 0 [static]

Definition at line 114 of file ffmpeg.c.

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

uint8_t* subtitle_out [static]

Definition at line 125 of file ffmpeg.c.

Referenced by do_subtitle_out(), and exit_program().

int64_t subtitle_size = 0 [static]

Definition at line 117 of file ffmpeg.c.

Referenced by do_streamcopy(), and print_report().

int64_t video_size = 0 [static]

Definition at line 115 of file ffmpeg.c.

Referenced by cdxl_read_packet(), decode_0(), decode_frame(), do_streamcopy(), do_video_out(), do_video_stats(), flush_encoders(), print_report(), and rpl_read_header().

FILE* vstats_file [static]

Definition at line 109 of file ffmpeg.c.

Referenced by do_video_stats(), and exit_program().