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FFmpeg/ffmpeg.c

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/*
* FFmpeg main
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define HAVE_AV_CONFIG_H
#include "avformat.h"
#include "tick.h"
#ifndef CONFIG_WIN32
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#include <sys/resource.h>
#endif
#include <time.h>
#include <ctype.h>
#define MAXINT64 INT64_C(0x7fffffffffffffff)
typedef struct {
const char *name;
int flags;
#define HAS_ARG 0x0001
#define OPT_BOOL 0x0002
#define OPT_EXPERT 0x0004
#define OPT_STRING 0x0008
union {
void (*func_arg)();
int *int_arg;
char **str_arg;
} u;
const char *help;
const char *argname;
} OptionDef;
/* select an input stream for an output stream */
typedef struct AVStreamMap {
int file_index;
int stream_index;
} AVStreamMap;
extern const OptionDef options[];
void show_help(void);
#define MAX_FILES 20
static AVFormatContext *input_files[MAX_FILES];
static int nb_input_files = 0;
static AVFormatContext *output_files[MAX_FILES];
static int nb_output_files = 0;
static AVStreamMap stream_maps[MAX_FILES];
static int nb_stream_maps;
static AVInputFormat *file_iformat;
static AVOutputFormat *file_oformat;
static int frame_width = 160;
static int frame_height = 128;
static int frame_rate = 25 * FRAME_RATE_BASE;
static int video_bit_rate = 200000;
static int video_bit_rate_tolerance = 200000;
static int video_qscale = 0;
static int video_qmin = 3;
static int video_qmax = 15;
static int video_qdiff = 3;
static float video_qblur = 0.5;
static float video_qcomp = 0.5;
static int me_method = 0;
static int video_disable = 0;
static int video_codec_id = CODEC_ID_NONE;
static int same_quality = 0;
static int b_frames = 0;
static int use_hq = 0;
static int use_4mv = 0;
static int do_deinterlace = 0;
static int gop_size = 12;
static int intra_only = 0;
static int audio_sample_rate = 44100;
static int audio_bit_rate = 64000;
static int audio_disable = 0;
static int audio_channels = 1;
static int audio_codec_id = CODEC_ID_NONE;
static INT64 recording_time = 0;
static int file_overwrite = 0;
static char *str_title = NULL;
static char *str_author = NULL;
static char *str_copyright = NULL;
static char *str_comment = NULL;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_play = 0;
static int do_psnr = 0;
static int do_vstats = 0;
static int mpeg_vcd = 0;
#ifndef CONFIG_AUDIO_OSS
const char *audio_device = "none";
#endif
#ifndef CONFIG_VIDEO4LINUX
const char *v4l_device = "none";
#endif
typedef struct AVOutputStream {
int file_index; /* file index */
int index; /* stream index in the output file */
int source_index; /* AVInputStream index */
AVStream *st; /* stream in the output file */
int encoding_needed; /* true if encoding needed for this stream */
/* video only */
AVPicture pict_tmp; /* temporary image for resizing */
int video_resample;
ImgReSampleContext *img_resample_ctx; /* for image resampling */
/* audio only */
int audio_resample;
ReSampleContext *resample; /* for audio resampling */
FifoBuffer fifo; /* for compression: one audio fifo per codec */
} AVOutputStream;
typedef struct AVInputStream {
int file_index;
int index;
AVStream *st;
int discard; /* true if stream data should be discarded */
int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
Ticker pts_ticker; /* Ticker for PTS calculation */
int ticker_inited; /* to signal if the ticker was initialized */
INT64 pts; /* current pts */
int pts_increment; /* expected pts increment for next packet */
int frame_number; /* current frame */
INT64 sample_index; /* current sample */
} AVInputStream;
typedef struct AVInputFile {
int eof_reached; /* true if eof reached */
int ist_index; /* index of first stream in ist_table */
int buffer_size; /* current total buffer size */
int buffer_size_max; /* buffer size at which we consider we can stop
buffering */
int nb_streams; /* nb streams we are aware of */
} AVInputFile;
#ifndef CONFIG_WIN32
/* init terminal so that we can grab keys */
static struct termios oldtty;
static void term_exit(void)
{
tcsetattr (0, TCSANOW, &oldtty);
}
static void term_init(void)
{
struct termios tty;
tcgetattr (0, &tty);
oldtty = tty;
tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
|INLCR|IGNCR|ICRNL|IXON);
tty.c_oflag |= OPOST;
tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
tty.c_cflag &= ~(CSIZE|PARENB);
tty.c_cflag |= CS8;
tty.c_cc[VMIN] = 1;
tty.c_cc[VTIME] = 0;
tcsetattr (0, TCSANOW, &tty);
atexit(term_exit);
}
/* read a key without blocking */
static int read_key(void)
{
struct timeval tv;
int n;
unsigned char ch;
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(0, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 0;
n = select(1, &rfds, NULL, NULL, &tv);
if (n > 0) {
n = read(0, &ch, 1);
if (n == 1)
return ch;
return n;
}
return -1;
}
#else
/* no interactive support */
static void term_exit(void)
{
}
static void term_init(void)
{
}
static int read_key(void)
{
return 0;
}
#endif
int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
int i, err;
AVFormatContext *ic;
err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
if (err < 0)
return err;
/* copy stream format */
s->nb_streams = ic->nb_streams;
for(i=0;i<ic->nb_streams;i++) {
AVStream *st;
st = av_mallocz(sizeof(AVFormatContext));
memcpy(st, ic->streams[i], sizeof(AVStream));
s->streams[i] = st;
}
av_close_input_file(ic);
return 0;
}
#define MAX_AUDIO_PACKET_SIZE 16384
static void do_audio_out(AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
unsigned char *buf, int size)
{
UINT8 *buftmp;
UINT8 audio_buf[2*MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
UINT8 audio_out[MAX_AUDIO_PACKET_SIZE]; /* XXX: allocate it */
int size_out, frame_bytes, ret;
AVCodecContext *enc;
enc = &ost->st->codec;
if (ost->audio_resample) {
buftmp = audio_buf;
size_out = audio_resample(ost->resample,
(short *)buftmp, (short *)buf,
size / (ist->st->codec.channels * 2));
size_out = size_out * enc->channels * 2;
} else {
buftmp = buf;
size_out = size;
}
/* now encode as many frames as possible */
if (enc->frame_size > 1) {
/* output resampled raw samples */
fifo_write(&ost->fifo, buftmp, size_out,
&ost->fifo.wptr);
frame_bytes = enc->frame_size * 2 * enc->channels;
while (fifo_read(&ost->fifo, audio_buf, frame_bytes,
&ost->fifo.rptr) == 0) {
ret = avcodec_encode_audio(enc, audio_out, sizeof(audio_out),
(short *)audio_buf);
s->oformat->write_packet(s, ost->index, audio_out, ret, 0);
}
} else {
/* output a pcm frame */
/* XXX: change encoding codec API to avoid this ? */
switch(enc->codec->id) {
case CODEC_ID_PCM_S16LE:
case CODEC_ID_PCM_S16BE:
case CODEC_ID_PCM_U16LE:
case CODEC_ID_PCM_U16BE:
break;
default:
size_out = size_out >> 1;
break;
}
ret = avcodec_encode_audio(enc, audio_out, size_out,
(short *)buftmp);
s->oformat->write_packet(s, ost->index, audio_out, ret, 0);
}
}
/* write a picture to a raw mux */
static void write_picture(AVFormatContext *s, int index, AVPicture *picture,
int pix_fmt, int w, int h)
{
UINT8 *buf, *src, *dest;
int size, j, i;
/* XXX: not efficient, should add test if we can take
directly the AVPicture */
switch(pix_fmt) {
case PIX_FMT_YUV420P:
size = avpicture_get_size(pix_fmt, w, h);
buf = av_malloc(size);
if (!buf)
return;
dest = buf;
for(i=0;i<3;i++) {
if (i == 1) {
w >>= 1;
h >>= 1;
}
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV422P:
size = (w * h) * 2;
buf = av_malloc(size);
if (!buf)
return;
dest = buf;
for(i=0;i<3;i++) {
if (i == 1) {
w >>= 1;
}
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV444P:
size = (w * h) * 3;
buf = av_malloc(size);
if (!buf)
return;
dest = buf;
for(i=0;i<3;i++) {
src = picture->data[i];
for(j=0;j<h;j++) {
memcpy(dest, src, w);
dest += w;
src += picture->linesize[i];
}
}
break;
case PIX_FMT_YUV422:
size = (w * h) * 2;
buf = av_malloc(size);
if (!buf)
return;
dest = buf;
src = picture->data[0];
for(j=0;j<h;j++) {
memcpy(dest, src, w * 2);
dest += w * 2;
src += picture->linesize[0];
}
break;
case PIX_FMT_RGB24:
case PIX_FMT_BGR24:
size = (w * h) * 3;
buf = av_malloc(size);
if (!buf)
return;
dest = buf;
src = picture->data[0];
for(j=0;j<h;j++) {
memcpy(dest, src, w * 3);
dest += w * 3;
src += picture->linesize[0];
}
break;
default:
return;
}
s->oformat->write_packet(s, index, buf, size, 0);
av_free(buf);
}
static void do_video_out(AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
AVPicture *picture1,
int *frame_size)
{
int n1, n2, nb, i, ret, frame_number, dec_frame_rate;
AVPicture *picture, *picture2, *pict;
AVPicture picture_tmp1, picture_tmp2;
static UINT8 *video_buffer;
UINT8 *buf = NULL, *buf1 = NULL;
AVCodecContext *enc, *dec;
#define VIDEO_BUFFER_SIZE (1024*1024)
enc = &ost->st->codec;
dec = &ist->st->codec;
frame_number = ist->frame_number;
dec_frame_rate = ist->st->r_frame_rate;
// fprintf(stderr, "\n%d", dec_frame_rate);
/* first drop frame if needed */
n1 = ((INT64)frame_number * enc->frame_rate) / dec_frame_rate;
n2 = (((INT64)frame_number + 1) * enc->frame_rate) / dec_frame_rate;
nb = n2 - n1;
if (nb <= 0)
return;
if (!video_buffer)
video_buffer= av_malloc(VIDEO_BUFFER_SIZE);
if(!video_buffer) return;
/* deinterlace : must be done before any resize */
if (do_deinterlace) {
int size;
/* create temporary picture */
size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
buf1 = av_malloc(size);
if (!buf1)
return;
picture2 = &picture_tmp2;
avpicture_fill(picture2, buf1, dec->pix_fmt, dec->width, dec->height);
if (avpicture_deinterlace(picture2, picture1,
dec->pix_fmt, dec->width, dec->height) < 0) {
/* if error, do not deinterlace */
av_free(buf1);
buf1 = NULL;
picture2 = picture1;
}
} else {
picture2 = picture1;
}
/* convert pixel format if needed */
if (enc->pix_fmt != dec->pix_fmt) {
int size;
/* create temporary picture */
size = avpicture_get_size(enc->pix_fmt, dec->width, dec->height);
buf = av_malloc(size);
if (!buf)
return;
pict = &picture_tmp1;
avpicture_fill(pict, buf, enc->pix_fmt, dec->width, dec->height);
if (img_convert(pict, enc->pix_fmt,
picture2, dec->pix_fmt,
dec->width, dec->height) < 0) {
fprintf(stderr, "pixel format conversion not handled\n");
goto the_end;
}
} else {
pict = picture2;
}
/* XXX: resampling could be done before raw format convertion in
some cases to go faster */
/* XXX: only works for YUV420P */
if (ost->video_resample) {
picture = &ost->pict_tmp;
img_resample(ost->img_resample_ctx, picture, pict);
} else {
picture = pict;
}
nb=1;
/* duplicates frame if needed */
/* XXX: pb because no interleaving */
for(i=0;i<nb;i++) {
if (enc->codec_id != CODEC_ID_RAWVIDEO) {
/* handles sameq here. This is not correct because it may
not be a global option */
if (same_quality) {
enc->quality = dec->quality;
}
ret = avcodec_encode_video(enc,
video_buffer, VIDEO_BUFFER_SIZE,
picture);
//enc->frame_number = enc->real_pict_num;
s->oformat->write_packet(s, ost->index, video_buffer, ret, 0);
*frame_size = ret;
//fprintf(stderr,"\nFrame: %3d %3d size: %5d type: %d",
// enc->frame_number-1, enc->real_pict_num, ret,
// enc->pict_type);
} else {
write_picture(s, ost->index, picture, enc->pix_fmt, enc->width, enc->height);
}
}
the_end:
av_free(buf);
av_free(buf1);
}
static void do_video_stats(AVOutputStream *ost,
AVInputStream *ist,
int frame_size)
{
static FILE *fvstats=NULL;
static INT64 total_size = 0;
char filename[40];
time_t today2;
struct tm *today;
AVCodecContext *enc;
int frame_number;
INT64 ti;
double ti1, bitrate, avg_bitrate;
if (!fvstats) {
today2 = time(NULL);
today = localtime(&today2);
sprintf(filename, "vstats_%02d%02d%02d.log", today->tm_hour,
today->tm_min,
today->tm_sec);
fvstats = fopen(filename,"w");
if (!fvstats) {
perror("fopen");
exit(1);
}
}
ti = MAXINT64;
enc = &ost->st->codec;
total_size += frame_size;
if (enc->codec_type == CODEC_TYPE_VIDEO) {
frame_number = ist->frame_number;
fprintf(fvstats, "frame= %5d q= %2d ", frame_number, enc->quality);
if (do_psnr)
fprintf(fvstats, "PSNR= %6.2f ", enc->psnr_y);
fprintf(fvstats,"f_size= %6d ", frame_size);
/* compute min pts value */
if (!ist->discard && ist->pts < ti) {
ti = ist->pts;
}
ti1 = (double)ti / 1000000.0;
if (ti1 < 0.01)
ti1 = 0.01;
bitrate = (double)(frame_size * 8) * enc->frame_rate / FRAME_RATE_BASE / 1000.0;
avg_bitrate = (double)(total_size * 8) / ti1 / 1000.0;
fprintf(fvstats, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
(double)total_size / 1024, ti1, bitrate, avg_bitrate);
fprintf(fvstats,"type= %s\n", enc->key_frame == 1 ? "I" : "P");
}
}
/*
* The following code is the main loop of the file converter
*/
static int av_encode(AVFormatContext **output_files,
int nb_output_files,
AVFormatContext **input_files,
int nb_input_files,
AVStreamMap *stream_maps, int nb_stream_maps)
{
int ret, i, j, k, n, nb_istreams = 0, nb_ostreams = 0;
AVFormatContext *is, *os;
AVCodecContext *codec, *icodec;
AVOutputStream *ost, **ost_table = NULL;
AVInputStream *ist, **ist_table = NULL;
INT64 min_pts, start_time;
AVInputFile *file_table;
AVFormatContext *stream_no_data;
int key;
file_table= (AVInputFile*) av_mallocz(nb_input_files * sizeof(AVInputFile));
if (!file_table)
goto fail;
/* input stream init */
j = 0;
for(i=0;i<nb_input_files;i++) {
is = input_files[i];
file_table[i].ist_index = j;
file_table[i].nb_streams = is->nb_streams;
j += is->nb_streams;
}
nb_istreams = j;
ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
if (!ist_table)
goto fail;
for(i=0;i<nb_istreams;i++) {
ist = av_mallocz(sizeof(AVInputStream));
if (!ist)
goto fail;
ist_table[i] = ist;
}
j = 0;
for(i=0;i<nb_input_files;i++) {
is = input_files[i];
for(k=0;k<is->nb_streams;k++) {
ist = ist_table[j++];
ist->st = is->streams[k];
ist->file_index = i;
ist->index = k;
ist->discard = 1; /* the stream is discarded by default
(changed later) */
}
}
/* output stream init */
nb_ostreams = 0;
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
nb_ostreams += os->nb_streams;
if (mpeg_vcd)
os->flags |= AVF_FLAG_VCD;
}
if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
fprintf(stderr, "Number of stream maps must match number of output streams\n");
exit(1);
}
ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
if (!ost_table)
goto fail;
for(i=0;i<nb_ostreams;i++) {
ost = av_mallocz(sizeof(AVOutputStream));
if (!ost)
goto fail;
ost_table[i] = ost;
}
n = 0;
for(k=0;k<nb_output_files;k++) {
os = output_files[k];
for(i=0;i<os->nb_streams;i++) {
int found;
ost = ost_table[n++];
ost->file_index = k;
ost->index = i;
ost->st = os->streams[i];
if (nb_stream_maps > 0) {
ost->source_index = file_table[stream_maps[n-1].file_index].ist_index +
stream_maps[n-1].stream_index;
} else {
/* get corresponding input stream index : we select the first one with the right type */
found = 0;
for(j=0;j<nb_istreams;j++) {
ist = ist_table[j];
if (ist->discard &&
ist->st->codec.codec_type == ost->st->codec.codec_type) {
ost->source_index = j;
found = 1;
}
}
if (!found) {
/* try again and reuse existing stream */
for(j=0;j<nb_istreams;j++) {
ist = ist_table[j];
if (ist->st->codec.codec_type == ost->st->codec.codec_type) {
ost->source_index = j;
found = 1;
}
}
if (!found) {
fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
ost->file_index, ost->index);
exit(1);
}
}
}
ist = ist_table[ost->source_index];
ist->discard = 0;
}
}
/* dump the stream mapping */
fprintf(stderr, "Stream mapping:\n");
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
fprintf(stderr, " Stream #%d.%d -> #%d.%d\n",
ist_table[ost->source_index]->file_index,
ist_table[ost->source_index]->index,
ost->file_index,
ost->index);
}
/* for each output stream, we compute the right encoding parameters */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
ist = ist_table[ost->source_index];
codec = &ost->st->codec;
icodec = &ist->st->codec;
switch(codec->codec_type) {
case CODEC_TYPE_AUDIO:
/* check if same codec with same parameters. If so, no
reencoding is needed */
if (codec->codec_id == icodec->codec_id &&
codec->bit_rate == icodec->bit_rate &&
codec->sample_rate == icodec->sample_rate &&
codec->channels == icodec->channels) {
/* no reencoding */
/* use the same frame size */
codec->frame_size = icodec->frame_size;
//codec->frame_size = 8*icodec->sample_rate*icodec->frame_size/
// icodec->bit_rate;
//fprintf(stderr,"\nFrame size: %d", codec->frame_size);
} else {
if (fifo_init(&ost->fifo, 2 * MAX_AUDIO_PACKET_SIZE))
goto fail;
if (codec->channels == icodec->channels &&
codec->sample_rate == icodec->sample_rate) {
ost->audio_resample = 0;
} else {
if (codec->channels != icodec->channels &&
icodec->codec_id == CODEC_ID_AC3) {
/* Special case for 5:1 AC3 input */
/* and mono or stereo output */
/* Request specific number of channels */
icodec->channels = codec->channels;
if (codec->sample_rate == icodec->sample_rate)
ost->audio_resample = 0;
else {
ost->audio_resample = 1;
ost->resample = audio_resample_init(codec->channels, icodec->channels,
codec->sample_rate,
icodec->sample_rate);
}
/* Request specific number of channels */
icodec->channels = codec->channels;
} else {
ost->audio_resample = 1;
ost->resample = audio_resample_init(codec->channels, icodec->channels,
codec->sample_rate,
icodec->sample_rate);
}
}
ist->decoding_needed = 1;
ost->encoding_needed = 1;
}
break;
case CODEC_TYPE_VIDEO:
/* check if same codec with same parameters. If so, no
reencoding is needed */
if (codec->codec_id == icodec->codec_id &&
codec->bit_rate == icodec->bit_rate &&
codec->frame_rate == icodec->frame_rate &&
codec->width == icodec->width &&
codec->height == icodec->height) {
/* no reencoding */
} else {
if (codec->width == icodec->width &&
codec->height == icodec->height) {
ost->video_resample = 0;
} else {
UINT8 *buf;
ost->video_resample = 1;
buf = av_malloc((codec->width * codec->height * 3) / 2);
if (!buf)
goto fail;
ost->pict_tmp.data[0] = buf;
ost->pict_tmp.data[1] = ost->pict_tmp.data[0] + (codec->width * codec->height);
ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (codec->width * codec->height) / 4;
ost->pict_tmp.linesize[0] = codec->width;
ost->pict_tmp.linesize[1] = codec->width / 2;
ost->pict_tmp.linesize[2] = codec->width / 2;
ost->img_resample_ctx = img_resample_init(
ost->st->codec.width, ost->st->codec.height,
ist->st->codec.width, ist->st->codec.height);
}
ost->encoding_needed = 1;
ist->decoding_needed = 1;
}
break;
default:
av_abort();
}
}
/* open each encoder */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost->encoding_needed) {
AVCodec *codec;
codec = avcodec_find_encoder(ost->st->codec.codec_id);
if (!codec) {
fprintf(stderr, "Unsupported codec for output stream #%d.%d\n",
ost->file_index, ost->index);
exit(1);
}
if (avcodec_open(&ost->st->codec, codec) < 0) {
fprintf(stderr, "Error while opening codec for stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n",
ost->file_index, ost->index);
exit(1);
}
}
}
/* open each decoder */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist->decoding_needed) {
AVCodec *codec;
codec = avcodec_find_decoder(ist->st->codec.codec_id);
if (!codec) {
fprintf(stderr, "Unsupported codec for input stream #%d.%d\n",
ist->file_index, ist->index);
exit(1);
}
if (avcodec_open(&ist->st->codec, codec) < 0) {
fprintf(stderr, "Error while opening codec for input stream #%d.%d\n",
ist->file_index, ist->index);
exit(1);
}
//if (ist->st->codec.codec_type == CODEC_TYPE_VIDEO)
// ist->st->codec.flags |= CODEC_FLAG_REPEAT_FIELD;
}
}
/* init pts */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
ist->pts = 0;
ist->frame_number = 0;
}
/* compute buffer size max (should use a complete heuristic) */
for(i=0;i<nb_input_files;i++) {
file_table[i].buffer_size_max = 2048;
}
/* open files and write file headers */
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
if (av_write_header(os) < 0) {
fprintf(stderr, "Could not write header for output file #%d (incorrect codec paramters ?)\n", i);
ret = -EINVAL;
goto fail;
}
}
#ifndef CONFIG_WIN32
if (!do_play) {
fprintf(stderr, "Press [q] to stop encoding\n");
} else {
fprintf(stderr, "Press [q] to stop playing\n");
}
#endif
term_init();
start_time = gettime();
min_pts = 0;
stream_no_data = 0;
key = -1;
for(;;) {
int file_index, ist_index;
AVPacket pkt;
UINT8 *ptr;
int len;
UINT8 *data_buf;
int data_size, got_picture;
AVPicture picture;
short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
redo:
/* if 'q' pressed, exits */
if (key) {
/* read_key() returns 0 on EOF */
key = read_key();
if (key == 'q')
break;
}
/* select the input file with the smallest pts */
file_index = -1;
min_pts = MAXINT64;
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
/* For some reason, the pts_increment code breaks q estimation?!? */
if (!ist->discard && !file_table[ist->file_index].eof_reached &&
ist->pts /* + ist->pts_increment */ < min_pts && input_files[ist->file_index] != stream_no_data) {
min_pts = ist->pts /* + ist->pts_increment */;
file_index = ist->file_index;
}
}
/* if none, if is finished */
if (file_index < 0) {
if (stream_no_data) {
#ifndef CONFIG_WIN32
struct timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = 1000 * 1000 * 10;
nanosleep(&ts, 0);
#endif
stream_no_data = 0;
continue;
}
break;
}
/* finish if recording time exhausted */
if (recording_time > 0 && min_pts >= recording_time)
break;
/* read a packet from it and output it in the fifo */
is = input_files[file_index];
if (av_read_packet(is, &pkt) < 0) {
file_table[file_index].eof_reached = 1;
continue;
}
if (!pkt.size) {
stream_no_data = is;
} else {
stream_no_data = 0;
}
/* the following test is needed in case new streams appear
dynamically in stream : we ignore them */
if (pkt.stream_index >= file_table[file_index].nb_streams)
goto discard_packet;
ist_index = file_table[file_index].ist_index + pkt.stream_index;
ist = ist_table[ist_index];
if (ist->discard)
goto discard_packet;
if (pkt.flags & PKT_FLAG_DROPPED_FRAME)
ist->frame_number++;
if (do_hex_dump) {
printf("stream #%d, size=%d:\n", pkt.stream_index, pkt.size);
av_hex_dump(pkt.data, pkt.size);
}
// printf("read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
len = pkt.size;
ptr = pkt.data;
while (len > 0) {
/* decode the packet if needed */
data_buf = NULL; /* fail safe */
data_size = 0;
if (ist->decoding_needed) {
switch(ist->st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
/* XXX: could avoid copy if PCM 16 bits with same
endianness as CPU */
ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
ptr, len);
if (ret < 0)
goto fail_decode;
/* Some bug in mpeg audio decoder gives */
/* data_size < 0, it seems they are overflows */
if (data_size <= 0) {
/* no audio frame */
ptr += ret;
len -= ret;
continue;
}
data_buf = (UINT8 *)samples;
break;
case CODEC_TYPE_VIDEO:
if (ist->st->codec.codec_id == CODEC_ID_RAWVIDEO) {
int size;
size = (ist->st->codec.width * ist->st->codec.height);
avpicture_fill(&picture, ptr,
ist->st->codec.pix_fmt,
ist->st->codec.width,
ist->st->codec.height);
ret = len;
} else {
data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2;
ret = avcodec_decode_video(&ist->st->codec,
&picture, &got_picture, ptr, len);
if (ret < 0) {
fail_decode:
fprintf(stderr, "Error while decoding stream #%d.%d\n",
ist->file_index, ist->index);
av_free_packet(&pkt);
goto redo;
}
if (!got_picture) {
/* no picture yet */
ptr += ret;
len -= ret;
continue;
}
}
break;
default:
goto fail_decode;
}
} else {
data_buf = ptr;
data_size = len;
ret = len;
}
/* init tickers */
if (!ist->ticker_inited) {
switch (ist->st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
ticker_init(&ist->pts_ticker,
(INT64)ist->st->codec.sample_rate,
(INT64)(1000000));
ist->ticker_inited = 1;
break;
case CODEC_TYPE_VIDEO:
ticker_init(&ist->pts_ticker,
(INT64)ist->st->r_frame_rate,
((INT64)1000000 * FRAME_RATE_BASE));
ist->ticker_inited = 1;
break;
default:
av_abort();
}
}
/* update pts */
switch(ist->st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
//ist->pts = (INT64)1000000 * ist->sample_index / ist->st->codec.sample_rate;
ist->pts = ticker_abs(&ist->pts_ticker, ist->sample_index);
ist->sample_index += data_size / (2 * ist->st->codec.channels);
ist->pts_increment = (INT64) (data_size / (2 * ist->st->codec.channels)) * 1000000 / ist->st->codec.sample_rate;
break;
case CODEC_TYPE_VIDEO:
ist->frame_number++;
//ist->pts = ((INT64)ist->frame_number * 1000000 * FRAME_RATE_BASE) /
// ist->st->codec.frame_rate;
ist->pts = ticker_abs(&ist->pts_ticker, ist->frame_number);
ist->pts_increment = ((INT64) 1000000 * FRAME_RATE_BASE) /
ist->st->codec.frame_rate;
break;
default:
av_abort();
}
ptr += ret;
len -= ret;
/* transcode raw format, encode packets and output them */
for(i=0;i<nb_ostreams;i++) {
int frame_size;
ost = ost_table[i];
if (ost->source_index == ist_index) {
os = output_files[ost->file_index];
if (ost->encoding_needed) {
switch(ost->st->codec.codec_type) {
case CODEC_TYPE_AUDIO:
do_audio_out(os, ost, ist, data_buf, data_size);
break;
case CODEC_TYPE_VIDEO:
do_video_out(os, ost, ist, &picture, &frame_size);
if (do_vstats)
do_video_stats(ost, ist, frame_size);
break;
default:
av_abort();
}
} else {
/* no reencoding needed : output the packet directly */
/* force the input stream PTS */
os->oformat->write_packet(os, ost->index, data_buf, data_size, pkt.pts);
}
}
}
}
discard_packet:
av_free_packet(&pkt);
/* dump report by using the first video and audio streams */
{
char buf[1024];
AVFormatContext *oc;
INT64 total_size, ti;
AVCodecContext *enc;
int frame_number, vid;
double bitrate, ti1;
static INT64 last_time;
if ((min_pts - last_time) >= 500000) {
last_time = min_pts;
oc = output_files[0];
total_size = url_ftell(&oc->pb);
buf[0] = '\0';
ti = MAXINT64;
vid = 0;
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
ist = ist_table[ost->source_index];
if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
frame_number = ist->frame_number;
sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
frame_number, enc->quality);
if (do_psnr)
sprintf(buf + strlen(buf), "PSNR=%6.2f ", enc->psnr_y);
vid = 1;
}
/* compute min pts value */
if (!ist->discard && ist->pts < ti) {
ti = ist->pts;
}
}
ti1 = (double)ti / 1000000.0;
if (ti1 < 0.01)
ti1 = 0.01;
bitrate = (double)(total_size * 8) / ti1 / 1000.0;
sprintf(buf + strlen(buf),
"size=%8.0fkB time=%0.1f bitrate=%6.1fkbits/s",
(double)total_size / 1024, ti1, bitrate);
fprintf(stderr, "%s \r", buf);
fflush(stderr);
}
}
}
term_exit();
/* dump report by using the first video and audio streams */
{
char buf[1024];
AVFormatContext *oc;
INT64 total_size, ti;
AVCodecContext *enc;
int frame_number, vid;
double bitrate, ti1;
oc = output_files[0];
total_size = url_ftell(&oc->pb);
buf[0] = '\0';
ti = MAXINT64;
vid = 0;
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
ist = ist_table[ost->source_index];
if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
frame_number = ist->frame_number;
sprintf(buf + strlen(buf), "frame=%5d q=%2d ",
frame_number, enc->quality);
if (do_psnr)
sprintf(buf + strlen(buf), "PSNR=%6.2f ", enc->psnr_y);
vid = 1;
}
/* compute min pts value */
if (!ist->discard && ist->pts < ti) {
ti = ist->pts;
}
}
ti1 = ti / 1000000.0;
if (ti1 < 0.01)
ti1 = 0.01;
bitrate = (double)(total_size * 8) / ti1 / 1000.0;
sprintf(buf + strlen(buf),
"size=%8.0fkB time=%0.1f bitrate=%6.1fkbits/s",
(double)total_size / 1024, ti1, bitrate);
fprintf(stderr, "%s \n", buf);
}
/* close each encoder */
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost->encoding_needed) {
avcodec_close(&ost->st->codec);
}
}
/* close each decoder */
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist->decoding_needed) {
avcodec_close(&ist->st->codec);
}
}
/* write the trailer if needed and close file */
for(i=0;i<nb_output_files;i++) {
os = output_files[i];
av_write_trailer(os);
}
/* finished ! */
ret = 0;
fail1:
av_free(file_table);
if (ist_table) {
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
av_free(ist);
}
av_free(ist_table);
}
if (ost_table) {
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost) {
fifo_free(&ost->fifo); /* works even if fifo is not
initialized but set to zero */
av_free(ost->pict_tmp.data[0]);
if (ost->video_resample)
img_resample_close(ost->img_resample_ctx);
if (ost->audio_resample)
audio_resample_close(ost->resample);
av_free(ost);
}
}
av_free(ost_table);
}
return ret;
fail:
ret = -ENOMEM;
goto fail1;
}
#if 0
int file_read(const char *filename)
{
URLContext *h;
unsigned char buffer[1024];
int len, i;
if (url_open(&h, filename, O_RDONLY) < 0) {
printf("could not open '%s'\n", filename);
return -1;
}
for(;;) {
len = url_read(h, buffer, sizeof(buffer));
if (len <= 0)
break;
for(i=0;i<len;i++) putchar(buffer[i]);
}
url_close(h);
return 0;
}
#endif
void show_licence(void)
{
printf(
"ffmpeg version " FFMPEG_VERSION "\n"
"Copyright (c) 2000, 2001, 2002 Fabrice Bellard\n"
"This library is free software; you can redistribute it and/or\n"
"modify it under the terms of the GNU Lesser General Public\n"
"License as published by the Free Software Foundation; either\n"
"version 2 of the License, or (at your option) any later version.\n"
"\n"
"This library is distributed in the hope that it will be useful,\n"
"but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
"MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU\n"
"Lesser General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU Lesser General Public\n"
"License along with this library; if not, write to the Free Software\n"
"Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA\n"
);
exit(1);
}
void opt_format(const char *arg)
{
file_iformat = av_find_input_format(arg);
file_oformat = guess_format(arg, NULL, NULL);
if (!file_iformat && !file_oformat) {
fprintf(stderr, "Unknown input or output format: %s\n", arg);
exit(1);
}
}
void opt_video_bitrate(const char *arg)
{
video_bit_rate = atoi(arg) * 1000;
}
void opt_video_bitrate_tolerance(const char *arg)
{
video_bit_rate_tolerance = atoi(arg) * 1000;
}
void opt_frame_rate(const char *arg)
{
frame_rate = (int)(strtod(arg, 0) * FRAME_RATE_BASE);
}
void opt_frame_size(const char *arg)
{
parse_image_size(&frame_width, &frame_height, arg);
if (frame_width <= 0 || frame_height <= 0) {
fprintf(stderr, "Incorrect frame size\n");
exit(1);
}
if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
fprintf(stderr, "Frame size must be a multiple of 2\n");
exit(1);
}
}
void opt_gop_size(const char *arg)
{
gop_size = atoi(arg);
}
void opt_b_frames(const char *arg)
{
b_frames = atoi(arg);
if (b_frames > FF_MAX_B_FRAMES) {
fprintf(stderr, "\nCannot have more than %d B frames, increase FF_MAX_B_FRAMES.\n", FF_MAX_B_FRAMES);
exit(1);
} else if (b_frames < 1) {
fprintf(stderr, "\nNumber of B frames must be higher than 0\n");
exit(1);
}
}
void opt_qscale(const char *arg)
{
video_qscale = atoi(arg);
if (video_qscale < 0 ||
video_qscale > 31) {
fprintf(stderr, "qscale must be >= 1 and <= 31\n");
exit(1);
}
}
void opt_qmin(const char *arg)
{
video_qmin = atoi(arg);
if (video_qmin < 0 ||
video_qmin > 31) {
fprintf(stderr, "qmin must be >= 1 and <= 31\n");
exit(1);
}
}
void opt_qmax(const char *arg)
{
video_qmax = atoi(arg);
if (video_qmax < 0 ||
video_qmax > 31) {
fprintf(stderr, "qmax must be >= 1 and <= 31\n");
exit(1);
}
}
void opt_qdiff(const char *arg)
{
video_qdiff = atoi(arg);
if (video_qdiff < 0 ||
video_qdiff > 31) {
fprintf(stderr, "qdiff must be >= 1 and <= 31\n");
exit(1);
}
}
void opt_qblur(const char *arg)
{
video_qblur = atof(arg);
}
void opt_qcomp(const char *arg)
{
video_qcomp = atof(arg);
}
void opt_audio_bitrate(const char *arg)
{
audio_bit_rate = atoi(arg) * 1000;
}
void opt_audio_rate(const char *arg)
{
audio_sample_rate = atoi(arg);
}
void opt_audio_channels(const char *arg)
{
audio_channels = atoi(arg);
}
void opt_video_device(const char *arg)
{
v4l_device = strdup(arg);
}
void opt_audio_device(const char *arg)
{
audio_device = strdup(arg);
}
void opt_audio_codec(const char *arg)
{
AVCodec *p;
p = first_avcodec;
while (p) {
if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_AUDIO)
break;
p = p->next;
}
if (p == NULL) {
fprintf(stderr, "Unknown audio codec '%s'\n", arg);
exit(1);
} else {
audio_codec_id = p->id;
}
}
const char *motion_str[] = {
"zero",
"full",
"log",
"phods",
"epzs",
"x1",
NULL,
};
void opt_motion_estimation(const char *arg)
{
const char **p;
p = motion_str;
for(;;) {
if (!*p) {
fprintf(stderr, "Unknown motion estimation method '%s'\n", arg);
exit(1);
}
if (!strcmp(*p, arg))
break;
p++;
}
me_method = (p - motion_str) + 1;
}
void opt_video_codec(const char *arg)
{
AVCodec *p;
p = first_avcodec;
while (p) {
if (!strcmp(p->name, arg) && p->type == CODEC_TYPE_VIDEO)
break;
p = p->next;
}
if (p == NULL) {
fprintf(stderr, "Unknown video codec '%s'\n", arg);
exit(1);
} else {
video_codec_id = p->id;
}
}
void opt_map(const char *arg)
{
AVStreamMap *m;
const char *p;
p = arg;
m = &stream_maps[nb_stream_maps++];
m->file_index = strtol(arg, (char **)&p, 0);
if (*p)
p++;
m->stream_index = strtol(p, (char **)&p, 0);
}
void opt_recording_time(const char *arg)
{
recording_time = parse_date(arg, 1);
}
void print_error(const char *filename, int err)
{
switch(err) {
case AVERROR_NUMEXPECTED:
fprintf(stderr, "%s: Incorrect image filename syntax.\n"
"Use '%%d' to specify the image number:\n"
" for img1.jpg, img2.jpg, ..., use 'img%%d.jpg';\n"
" for img001.jpg, img002.jpg, ..., use 'img%%03d.jpg'.\n",
filename);
break;
case AVERROR_INVALIDDATA:
fprintf(stderr, "%s: Error while parsing header\n", filename);
break;
case AVERROR_NOFMT:
fprintf(stderr, "%s: Unknown format\n", filename);
break;
default:
fprintf(stderr, "%s: Error while opening file\n", filename);
break;
}
}
void opt_input_file(const char *filename)
{
AVFormatContext *ic;
AVFormatParameters params, *ap = &params;
int err, i, ret, rfps;
/* get default parameters from command line */
memset(ap, 0, sizeof(*ap));
ap->sample_rate = audio_sample_rate;
ap->channels = audio_channels;
ap->frame_rate = frame_rate;
ap->width = frame_width;
ap->height = frame_height;
/* open the input file with generic libav function */
err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
if (err < 0) {
print_error(filename, err);
exit(1);
}
/* If not enough info to get the stream parameters, we decode the
first frames to get it. (used in mpeg case for example) */
ret = av_find_stream_info(ic);
if (ret < 0) {
fprintf(stderr, "%s: could not find codec parameters\n", filename);
exit(1);
}
/* update the current parameters so that they match the one of the input stream */
for(i=0;i<ic->nb_streams;i++) {
AVCodecContext *enc = &ic->streams[i]->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
//fprintf(stderr, "\nInput Audio channels: %d", enc->channels);
audio_channels = enc->channels;
audio_sample_rate = enc->sample_rate;
break;
case CODEC_TYPE_VIDEO:
frame_height = enc->height;
frame_width = enc->width;
rfps = ic->streams[i]->r_frame_rate;
if (enc->frame_rate != rfps) {
fprintf(stderr,"\nSeems that stream %d comes from film source: %2.2f->%2.2f\n",
i, (float)enc->frame_rate / FRAME_RATE_BASE,
(float)rfps / FRAME_RATE_BASE);
}
/* update the current frame rate to match the stream frame rate */
frame_rate = rfps;
break;
default:
av_abort();
}
}
input_files[nb_input_files] = ic;
/* dump the file content */
dump_format(ic, nb_input_files, filename, 0);
nb_input_files++;
file_iformat = NULL;
file_oformat = NULL;
}
void check_audio_video_inputs(int *has_video_ptr, int *has_audio_ptr)
{
int has_video, has_audio, i, j;
AVFormatContext *ic;
has_video = 0;
has_audio = 0;
for(j=0;j<nb_input_files;j++) {
ic = input_files[j];
for(i=0;i<ic->nb_streams;i++) {
AVCodecContext *enc = &ic->streams[i]->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
has_audio = 1;
break;
case CODEC_TYPE_VIDEO:
has_video = 1;
break;
default:
av_abort();
}
}
}
*has_video_ptr = has_video;
*has_audio_ptr = has_audio;
}
void opt_output_file(const char *filename)
{
AVStream *st;
AVFormatContext *oc;
int use_video, use_audio, nb_streams, input_has_video, input_has_audio;
int codec_id;
if (!strcmp(filename, "-"))
filename = "pipe:";
oc = av_mallocz(sizeof(AVFormatContext));
if (!file_oformat) {
file_oformat = guess_format(NULL, filename, NULL);
if (!file_oformat) {
fprintf(stderr, "Unable for find a suitable output format for '%s'\n",
filename);
exit(1);
}
}
oc->oformat = file_oformat;
if (!strcmp(file_oformat->name, "ffm") &&
strstart(filename, "http:", NULL)) {
/* special case for files sent to ffserver: we get the stream
parameters from ffserver */
if (read_ffserver_streams(oc, filename) < 0) {
fprintf(stderr, "Could not read stream parameters from '%s'\n", filename);
exit(1);
}
} else {
use_video = file_oformat->video_codec != CODEC_ID_NONE;
use_audio = file_oformat->audio_codec != CODEC_ID_NONE;
/* disable if no corresponding type found and at least one
input file */
if (nb_input_files > 0) {
check_audio_video_inputs(&input_has_video, &input_has_audio);
if (!input_has_video)
use_video = 0;
if (!input_has_audio)
use_audio = 0;
}
/* manual disable */
if (audio_disable) {
use_audio = 0;
}
if (video_disable) {
use_video = 0;
}
nb_streams = 0;
if (use_video) {
AVCodecContext *video_enc;
st = av_mallocz(sizeof(AVStream));
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
exit(1);
}
video_enc = &st->codec;
codec_id = file_oformat->video_codec;
if (video_codec_id != CODEC_ID_NONE)
codec_id = video_codec_id;
video_enc->codec_id = codec_id;
video_enc->codec_type = CODEC_TYPE_VIDEO;
video_enc->bit_rate = video_bit_rate;
video_enc->bit_rate_tolerance = video_bit_rate_tolerance;
video_enc->frame_rate = frame_rate;
video_enc->width = frame_width;
video_enc->height = frame_height;
if (!intra_only)
video_enc->gop_size = gop_size;
else
video_enc->gop_size = 0;
if (video_qscale || same_quality) {
video_enc->flags |= CODEC_FLAG_QSCALE;
video_enc->quality = video_qscale;
}
if (use_hq) {
video_enc->flags |= CODEC_FLAG_HQ;
}
if (use_4mv) {
video_enc->flags |= CODEC_FLAG_HQ;
video_enc->flags |= CODEC_FLAG_4MV;
}
if (b_frames) {
if (codec_id != CODEC_ID_MPEG4) {
fprintf(stderr, "\nB frames encoding only supported by MPEG-4.\n");
exit(1);
}
video_enc->max_b_frames = b_frames;
video_enc->b_frame_strategy = 0;
video_enc->b_quant_factor = 2.0;
}
video_enc->qmin = video_qmin;
video_enc->qmax = video_qmax;
video_enc->max_qdiff = video_qdiff;
video_enc->qblur = video_qblur;
video_enc->qcompress = video_qcomp;
if (do_psnr)
video_enc->get_psnr = 1;
else
video_enc->get_psnr = 0;
video_enc->me_method = me_method;
/* XXX: need to find a way to set codec parameters */
if (oc->oformat->flags & AVFMT_RGB24) {
video_enc->pix_fmt = PIX_FMT_RGB24;
}
oc->streams[nb_streams] = st;
nb_streams++;
}
if (use_audio) {
AVCodecContext *audio_enc;
st = av_mallocz(sizeof(AVStream));
if (!st) {
fprintf(stderr, "Could not alloc stream\n");
exit(1);
}
audio_enc = &st->codec;
codec_id = file_oformat->audio_codec;
if (audio_codec_id != CODEC_ID_NONE)
codec_id = audio_codec_id;
audio_enc->codec_id = codec_id;
audio_enc->codec_type = CODEC_TYPE_AUDIO;
audio_enc->bit_rate = audio_bit_rate;
audio_enc->sample_rate = audio_sample_rate;
/* For audio codecs other than AC3 we limit */
/* the number of coded channels to stereo */
if (audio_channels > 2 && codec_id != CODEC_ID_AC3) {
audio_enc->channels = 2;
} else
audio_enc->channels = audio_channels;
oc->streams[nb_streams] = st;
nb_streams++;
}
oc->nb_streams = nb_streams;
if (!nb_streams) {
fprintf(stderr, "No audio or video streams available\n");
exit(1);
}
if (str_title)
pstrcpy(oc->title, sizeof(oc->title), str_title);
if (str_author)
pstrcpy(oc->author, sizeof(oc->author), str_author);
if (str_copyright)
pstrcpy(oc->copyright, sizeof(oc->copyright), str_copyright);
if (str_comment)
pstrcpy(oc->comment, sizeof(oc->comment), str_comment);
}
output_files[nb_output_files] = oc;
/* dump the file content */
dump_format(oc, nb_output_files, filename, 1);
nb_output_files++;
strcpy(oc->filename, filename);
/* check filename in case of an image number is expected */
if (oc->oformat->flags & AVFMT_NEEDNUMBER) {
if (filename_number_test(oc->filename) < 0) {
print_error(oc->filename, AVERROR_NUMEXPECTED);
exit(1);
}
}
if (!(oc->oformat->flags & AVFMT_NOFILE)) {
/* test if it already exists to avoid loosing precious files */
if (!file_overwrite &&
(strchr(filename, ':') == NULL ||
strstart(filename, "file:", NULL))) {
if (url_exist(filename)) {
int c;
printf("File '%s' already exists. Overwrite ? [y/N] ", filename);
fflush(stdout);
c = getchar();
if (toupper(c) != 'Y') {
fprintf(stderr, "Not overwriting - exiting\n");
exit(1);
}
}
}
/* open the file */
if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
fprintf(stderr, "Could not open '%s'\n", filename);
exit(1);
}
}
/* reset some options */
file_oformat = NULL;
file_iformat = NULL;
audio_disable = 0;
video_disable = 0;
audio_codec_id = CODEC_ID_NONE;
video_codec_id = CODEC_ID_NONE;
}
/* prepare dummy protocols for grab */
void prepare_grab(void)
{
int has_video, has_audio, i, j;
AVFormatContext *oc;
AVFormatContext *ic;
AVFormatParameters ap1, *ap = &ap1;
/* see if audio/video inputs are needed */
has_video = 0;
has_audio = 0;
memset(ap, 0, sizeof(*ap));
for(j=0;j<nb_output_files;j++) {
oc = output_files[j];
for(i=0;i<oc->nb_streams;i++) {
AVCodecContext *enc = &oc->streams[i]->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
if (enc->sample_rate > ap->sample_rate)
ap->sample_rate = enc->sample_rate;
if (enc->channels > ap->channels)
ap->channels = enc->channels;
has_audio = 1;
break;
case CODEC_TYPE_VIDEO:
if (enc->width > ap->width)
ap->width = enc->width;
if (enc->height > ap->height)
ap->height = enc->height;
if (enc->frame_rate > ap->frame_rate)
ap->frame_rate = enc->frame_rate;
has_video = 1;
break;
default:
av_abort();
}
}
}
if (has_video == 0 && has_audio == 0) {
fprintf(stderr, "Output file must have at least one audio or video stream\n");
exit(1);
}
if (has_video) {
AVInputFormat *fmt1;
fmt1 = av_find_input_format("video_grab_device");
if (av_open_input_file(&ic, "", fmt1, 0, ap) < 0) {
fprintf(stderr, "Could not find video grab device\n");
exit(1);
}
/* by now video grab has one stream */
ic->streams[0]->r_frame_rate = ap->frame_rate;
input_files[nb_input_files] = ic;
dump_format(ic, nb_input_files, v4l_device, 0);
nb_input_files++;
}
if (has_audio) {
AVInputFormat *fmt1;
fmt1 = av_find_input_format("audio_device");
if (av_open_input_file(&ic, "", fmt1, 0, ap) < 0) {
fprintf(stderr, "Could not find audio grab device\n");
exit(1);
}
input_files[nb_input_files] = ic;
dump_format(ic, nb_input_files, audio_device, 0);
nb_input_files++;
}
}
/* open the necessary output devices for playing */
void prepare_play(void)
{
file_iformat = NULL;
file_oformat = guess_format("audio_device", NULL, NULL);
if (!file_oformat) {
fprintf(stderr, "Could not find audio device\n");
exit(1);
}
opt_output_file(audio_device);
}
#ifndef CONFIG_WIN32
INT64 getutime(void)
{
struct rusage rusage;
getrusage(RUSAGE_SELF, &rusage);
return (rusage.ru_utime.tv_sec * 1000000LL) + rusage.ru_utime.tv_usec;
}
#else
INT64 getutime(void)
{
return gettime();
}
#endif
extern int ffm_nopts;
void opt_bitexact(void)
{
avcodec_set_bit_exact();
/* disable generate of real time pts in ffm (need to be supressed anyway) */
ffm_nopts = 1;
}
void show_formats(void)
{
AVInputFormat *ifmt;
AVOutputFormat *ofmt;
URLProtocol *up;
AVCodec *p;
const char **pp;
printf("File formats:\n");
printf(" Encoding:");
for(ofmt = first_oformat; ofmt != NULL; ofmt = ofmt->next) {
printf(" %s", ofmt->name);
}
printf("\n");
printf(" Decoding:");
for(ifmt = first_iformat; ifmt != NULL; ifmt = ifmt->next) {
printf(" %s", ifmt->name);
}
printf("\n");
printf("Codecs:\n");
printf(" Encoders:");
for(p = first_avcodec; p != NULL; p = p->next) {
if (p->encode)
printf(" %s", p->name);
}
printf("\n");
printf(" Decoders:");
for(p = first_avcodec; p != NULL; p = p->next) {
if (p->decode)
printf(" %s", p->name);
}
printf("\n");
printf("Supported file protocols:");
for(up = first_protocol; up != NULL; up = up->next)
printf(" %s:", up->name);
printf("\n");
printf("Frame size abbreviations: sqcif qcif cif 4cif\n");
printf("Motion estimation methods:");
pp = motion_str;
while (*pp) {
printf(" %s", *pp);
if ((pp - motion_str + 1) == ME_ZERO)
printf("(fastest)");
else if ((pp - motion_str + 1) == ME_FULL)
printf("(slowest)");
else if ((pp - motion_str + 1) == ME_EPZS)
printf("(default)");
pp++;
}
printf("\n");
exit(1);
}
void show_help(void)
{
const char *prog;
const OptionDef *po;
int i, expert;
prog = do_play ? "ffplay" : "ffmpeg";
printf("%s version " FFMPEG_VERSION ", Copyright (c) 2000, 2001, 2002 Fabrice Bellard\n",
prog);
if (!do_play) {
printf("usage: ffmpeg [[options] -i input_file]... {[options] outfile}...\n"
"Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder\n");
} else {
printf("usage: ffplay [options] input_file...\n"
"Simple audio player\n");
}
printf("\n"
"Main options are:\n");
for(i=0;i<2;i++) {
if (i == 1)
printf("\nAdvanced options are:\n");
for(po = options; po->name != NULL; po++) {
char buf[64];
expert = (po->flags & OPT_EXPERT) != 0;
if (expert == i) {
strcpy(buf, po->name);
if (po->flags & HAS_ARG) {
strcat(buf, " ");
strcat(buf, po->argname);
}
printf("-%-17s %s\n", buf, po->help);
}
}
}
exit(1);
}
const OptionDef options[] = {
{ "L", 0, {(void*)show_licence}, "show license" },
{ "h", 0, {(void*)show_help}, "show help" },
{ "formats", 0, {(void*)show_formats}, "show available formats, codecs, protocols, ..." },
{ "f", HAS_ARG, {(void*)opt_format}, "force format", "fmt" },
{ "vcd", OPT_BOOL, {(void*)&mpeg_vcd}, "output Video CD MPEG-PS compliant file" },
{ "i", HAS_ARG, {(void*)opt_input_file}, "input file name", "filename" },
{ "y", OPT_BOOL, {(void*)&file_overwrite}, "overwrite output files" },
{ "map", HAS_ARG | OPT_EXPERT, {(void*)opt_map}, "set input stream mapping", "file:stream" },
{ "t", HAS_ARG, {(void*)opt_recording_time}, "set the recording time", "duration" },
{ "title", HAS_ARG | OPT_STRING, {(void*)&str_title}, "set the title", "string" },
{ "author", HAS_ARG | OPT_STRING, {(void*)&str_author}, "set the author", "string" },
{ "copyright", HAS_ARG | OPT_STRING, {(void*)&str_copyright}, "set the copyright", "string" },
{ "comment", HAS_ARG | OPT_STRING, {(void*)&str_comment}, "set the comment", "string" },
/* video options */
{ "b", HAS_ARG, {(void*)opt_video_bitrate}, "set video bitrate (in kbit/s)", "bitrate" },
{ "r", HAS_ARG, {(void*)opt_frame_rate}, "set frame rate (in Hz)", "rate" },
{ "s", HAS_ARG, {(void*)opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
{ "g", HAS_ARG | OPT_EXPERT, {(void*)opt_gop_size}, "set the group of picture size", "gop_size" },
{ "intra", OPT_BOOL | OPT_EXPERT, {(void*)&intra_only}, "use only intra frames"},
{ "vn", OPT_BOOL, {(void*)&video_disable}, "disable video" },
{ "qscale", HAS_ARG | OPT_EXPERT, {(void*)opt_qscale}, "use fixed video quantiser scale (VBR)", "q" },
{ "qmin", HAS_ARG | OPT_EXPERT, {(void*)opt_qmin}, "min video quantiser scale (VBR)", "q" },
{ "qmax", HAS_ARG | OPT_EXPERT, {(void*)opt_qmax}, "max video quantiser scale (VBR)", "q" },
{ "qdiff", HAS_ARG | OPT_EXPERT, {(void*)opt_qdiff}, "max difference between the quantiser scale (VBR)", "q" },
{ "qblur", HAS_ARG | OPT_EXPERT, {(void*)opt_qblur}, "video quantiser scale blur (VBR)", "blur" },
{ "qcomp", HAS_ARG | OPT_EXPERT, {(void*)opt_qcomp}, "video quantiser scale compression (VBR)", "compression" },
{ "bt", HAS_ARG, {(void*)opt_video_bitrate_tolerance}, "set video bitrate tolerance (in kbit/s)", "tolerance" },
{ "vd", HAS_ARG | OPT_EXPERT, {(void*)opt_video_device}, "set video grab device", "device" },
{ "vcodec", HAS_ARG | OPT_EXPERT, {(void*)opt_video_codec}, "force video codec", "codec" },
{ "me", HAS_ARG | OPT_EXPERT, {(void*)opt_motion_estimation}, "set motion estimation method",
"method" },
{ "bf", HAS_ARG | OPT_EXPERT, {(void*)opt_b_frames}, "use 'frames' B frames (only MPEG-4)", "frames" },
{ "hq", OPT_BOOL | OPT_EXPERT, {(void*)&use_hq}, "activate high quality settings" },
{ "4mv", OPT_BOOL | OPT_EXPERT, {(void*)&use_4mv}, "use four motion vector by macroblock (only MPEG-4)" },
{ "sameq", OPT_BOOL, {(void*)&same_quality},
"use same video quality as source (implies VBR)" },
/* audio options */
{ "ab", HAS_ARG, {(void*)opt_audio_bitrate}, "set audio bitrate (in kbit/s)", "bitrate", },
{ "ar", HAS_ARG, {(void*)opt_audio_rate}, "set audio sampling rate (in Hz)", "rate" },
{ "ac", HAS_ARG, {(void*)opt_audio_channels}, "set number of audio channels", "channels" },
{ "an", OPT_BOOL, {(void*)&audio_disable}, "disable audio" },
{ "ad", HAS_ARG | OPT_EXPERT, {(void*)opt_audio_device}, "set audio device", "device" },
{ "acodec", HAS_ARG | OPT_EXPERT, {(void*)opt_audio_codec}, "force audio codec", "codec" },
{ "deinterlace", OPT_BOOL | OPT_EXPERT, {(void*)&do_deinterlace},
"deinterlace pictures" },
{ "benchmark", OPT_BOOL | OPT_EXPERT, {(void*)&do_benchmark},
"add timings for benchmarking" },
{ "hex", OPT_BOOL | OPT_EXPERT, {(void*)&do_hex_dump},
"dump each input packet" },
{ "psnr", OPT_BOOL | OPT_EXPERT, {(void*)&do_psnr}, "calculate PSNR of compressed frames" },
{ "vstats", OPT_BOOL | OPT_EXPERT, {(void*)&do_vstats}, "dump video coding statistics to file" },
{ "bitexact", OPT_EXPERT, {(void*)opt_bitexact}, "only use bit exact algorithms (for codec testing)" },
{ NULL, },
};
int main(int argc, char **argv)
{
int optindex, i;
const char *opt, *arg;
const OptionDef *po;
INT64 ti;
register_all();
/* detect if invoked as player */
i = strlen(argv[0]);
if (i >= 6 && !strcmp(argv[0] + i - 6, "ffplay"))
do_play = 1;
if (argc <= 1)
show_help();
/* parse options */
optindex = 1;
while (optindex < argc) {
opt = argv[optindex++];
if (opt[0] == '-' && opt[1] != '\0') {
po = options;
while (po->name != NULL) {
if (!strcmp(opt + 1, po->name))
break;
po++;
}
if (!po->name) {
fprintf(stderr, "%s: unrecognized option '%s'\n", argv[0], opt);
exit(1);
}
arg = NULL;
if (po->flags & HAS_ARG)
arg = argv[optindex++];
if (po->flags & OPT_STRING) {
char *str;
str = strdup(arg);
*po->u.str_arg = str;
} else if (po->flags & OPT_BOOL) {
*po->u.int_arg = 1;
} else {
po->u.func_arg(arg);
}
} else {
if (!do_play) {
opt_output_file(opt);
} else {
opt_input_file(opt);
}
}
}
if (!do_play) {
/* file converter / grab */
if (nb_output_files <= 0) {
fprintf(stderr, "Must supply at least one output file\n");
exit(1);
}
if (nb_input_files == 0) {
prepare_grab();
}
} else {
/* player */
if (nb_input_files <= 0) {
fprintf(stderr, "Must supply at least one input file\n");
exit(1);
}
prepare_play();
}
ti = getutime();
av_encode(output_files, nb_output_files, input_files, nb_input_files,
stream_maps, nb_stream_maps);
ti = getutime() - ti;
if (do_benchmark) {
printf("bench: utime=%0.3fs\n", ti / 1000000.0);
}
/* close files */
for(i=0;i<nb_output_files;i++) {
if (!(output_files[i]->oformat->flags & AVFMT_NOFILE))
url_fclose(&output_files[i]->pb);
}
for(i=0;i<nb_input_files;i++)
av_close_input_file(input_files[i]);
return 0;
}