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FFmpeg/ffmpeg.c

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/*
* FFmpeg main
* Copyright (c) 2000,2001 Gerard Lantau
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <sys/time.h>
#include <string.h>
#include <sys/poll.h>
#include <termios.h>
#include <ctype.h>
#include "avformat.h"
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 AVFormat *file_format;
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_qscale = 0;
static int video_disable = 0;
static int video_codec_id = CODEC_ID_NONE;
static int same_quality = 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;
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 */
int fifo_packet_rptr; /* read index in the corresponding
avinputstream packet fifo */
/* 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' */
INT64 pts; /* current pts */
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 */
} AVInputFile;
/* 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) {
if (read(0, &ch, 1) == 1)
return ch;
}
return -1;
}
#define AUDIO_FIFO_SIZE 8192
/* main loop for grabbing */
int av_grab(AVFormatContext *s)
{
UINT8 audio_buf[AUDIO_FIFO_SIZE/2];
UINT8 audio_buf1[AUDIO_FIFO_SIZE/2];
UINT8 audio_out[AUDIO_FIFO_SIZE/2];
UINT8 video_buffer[128*1024];
char buf[256];
short *samples;
URLContext *audio_handle = NULL, *video_handle = NULL;
int ret;
AVCodecContext *enc, *first_video_enc = NULL;
int frame_size, frame_bytes;
int use_audio, use_video;
int frame_rate, sample_rate, channels;
int width, height, frame_number, i, pix_fmt = 0;
AVOutputStream *ost_table[s->nb_streams], *ost;
UINT8 *picture_in_buf = NULL, *picture_420p = NULL;
int audio_fifo_size = 0, picture_size = 0;
INT64 time_start;
/* init output stream info */
for(i=0;i<s->nb_streams;i++)
ost_table[i] = NULL;
/* output stream init */
for(i=0;i<s->nb_streams;i++) {
ost = av_mallocz(sizeof(AVOutputStream));
if (!ost)
goto fail;
ost->index = i;
ost->st = s->streams[i];
ost_table[i] = ost;
}
use_audio = 0;
use_video = 0;
frame_rate = 0;
sample_rate = 0;
frame_size = 0;
channels = 1;
width = 0;
height = 0;
frame_number = 0;
for(i=0;i<s->nb_streams;i++) {
AVCodec *codec;
ost = ost_table[i];
enc = &ost->st->codec;
codec = avcodec_find_encoder(enc->codec_id);
if (!codec) {
fprintf(stderr, "Unknown codec\n");
return -1;
}
if (avcodec_open(enc, codec) < 0) {
fprintf(stderr, "Incorrect encode parameters\n");
return -1;
}
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
use_audio = 1;
if (enc->sample_rate > sample_rate)
sample_rate = enc->sample_rate;
if (enc->frame_size > frame_size)
frame_size = enc->frame_size;
if (enc->channels > channels)
channels = enc->channels;
break;
case CODEC_TYPE_VIDEO:
if (!first_video_enc)
first_video_enc = enc;
use_video = 1;
if (enc->frame_rate > frame_rate)
frame_rate = enc->frame_rate;
if (enc->width > width)
width = enc->width;
if (enc->height > height)
height = enc->height;
break;
}
}
/* audio */
samples = NULL;
if (use_audio) {
snprintf(buf, sizeof(buf), "audio:%d,%d", sample_rate, channels);
ret = url_open(&audio_handle, buf, URL_RDONLY);
if (ret < 0) {
fprintf(stderr, "Could not open audio device: disabling audio capture\n");
use_audio = 0;
} else {
URLFormat f;
/* read back exact grab parameters */
if (url_getformat(audio_handle, &f) < 0) {
fprintf(stderr, "could not read back video grab parameters\n");
goto fail;
}
sample_rate = f.sample_rate;
channels = f.channels;
audio_fifo_size = ((AUDIO_FIFO_SIZE / 2) / audio_handle->packet_size) *
audio_handle->packet_size;
fprintf(stderr, "Audio sampling: %d Hz, %s\n",
sample_rate, channels == 2 ? "stereo" : "mono");
}
}
/* video */
if (use_video) {
snprintf(buf, sizeof(buf), "video:%d,%d,%f",
width, height, (float)frame_rate / FRAME_RATE_BASE);
ret = url_open(&video_handle, buf, URL_RDONLY);
if (ret < 0) {
fprintf(stderr,"Could not init video 4 linux capture: disabling video capture\n");
use_video = 0;
} else {
URLFormat f;
const char *pix_fmt_str;
/* read back exact grab parameters */
if (url_getformat(video_handle, &f) < 0) {
fprintf(stderr, "could not read back video grab parameters\n");
goto fail;
}
width = f.width;
height = f.height;
pix_fmt = f.pix_fmt;
switch(pix_fmt) {
case PIX_FMT_YUV420P:
pix_fmt_str = "420P";
break;
case PIX_FMT_YUV422:
pix_fmt_str = "422";
break;
case PIX_FMT_RGB24:
pix_fmt_str = "RGB24";
break;
case PIX_FMT_BGR24:
pix_fmt_str = "BGR24";
break;
default:
pix_fmt_str = "???";
break;
}
picture_size = video_handle->packet_size;
picture_in_buf = malloc(picture_size);
if (!picture_in_buf)
goto fail;
/* allocate a temporary picture if not grabbing in 420P format */
if (pix_fmt != PIX_FMT_YUV420P) {
picture_420p = malloc((width * height * 3) / 2);
}
fprintf(stderr, "Video sampling: %dx%d, %s format, %0.2f fps\n",
width, height, pix_fmt_str, (float)frame_rate / FRAME_RATE_BASE);
}
}
if (!use_video && !use_audio) {
fprintf(stderr,"Could not open grab devices : exiting\n");
exit(1);
}
/* init built in conversion functions */
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
ost->audio_resample = 0;
if ((enc->channels != channels ||
enc->sample_rate != sample_rate)) {
ost->audio_resample = 1;
ost->resample = audio_resample_init(enc->channels, channels,
enc->sample_rate, sample_rate);
}
if (fifo_init(&ost->fifo, (2 * audio_fifo_size * enc->sample_rate) /
sample_rate))
goto fail;
break;
case CODEC_TYPE_VIDEO:
ost->video_resample = 0;
if (enc->width != width ||
enc->height != height) {
UINT8 *buf;
ost->video_resample = 1;
buf = malloc((enc->width * enc->height * 3) / 2);
if (!buf)
goto fail;
ost->pict_tmp.data[0] = buf;
ost->pict_tmp.data[1] = buf + enc->width * height;
ost->pict_tmp.data[2] = ost->pict_tmp.data[1] + (enc->width * height) / 4;
ost->pict_tmp.linesize[0] = enc->width;
ost->pict_tmp.linesize[1] = enc->width / 2;
ost->pict_tmp.linesize[2] = enc->width / 2;
ost->img_resample_ctx = img_resample_init(
ost->st->codec.width, ost->st->codec.height,
width, height);
}
}
}
fprintf(stderr, "Press [q] to stop encoding\n");
s->format->write_header(s);
time_start = gettime();
term_init();
for(;;) {
/* if 'q' pressed, exits */
if (read_key() == 'q')
break;
/* read & compress audio frames */
if (use_audio) {
int ret, nb_samples, nb_samples_out;
UINT8 *buftmp;
for(;;) {
ret = url_read(audio_handle, audio_buf, audio_fifo_size);
if (ret <= 0)
break;
/* fill each codec fifo by doing the right sample
rate conversion. This is not optimal because we
do too much work, but it is easy to do */
nb_samples = ret / (channels * 2);
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
if (enc->codec_type == CODEC_TYPE_AUDIO) {
/* rate & stereo convertion */
if (!ost->audio_resample) {
buftmp = audio_buf;
nb_samples_out = nb_samples;
} else {
buftmp = audio_buf1;
nb_samples_out = audio_resample(ost->resample,
(short *)buftmp, (short *)audio_buf,
nb_samples);
}
fifo_write(&ost->fifo, buftmp, nb_samples_out * enc->channels * 2,
&ost->fifo.wptr);
}
}
/* compress as many frame as possible with each audio codec */
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
if (enc->codec_type == CODEC_TYPE_AUDIO) {
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->format->write_packet(s, ost->index, audio_out, ret);
}
}
}
}
}
if (use_video) {
AVPicture *picture1;
AVPicture picture;
UINT8 *pict_buffer;
ret = url_read(video_handle, picture_in_buf, picture_size);
if (ret < 0)
break;
if (pix_fmt != PIX_FMT_YUV420P) {
pict_buffer = picture_420p;
img_convert_to_yuv420(pict_buffer, picture_in_buf, pix_fmt, width, height);
} else {
pict_buffer = picture_in_buf;
}
/* build a picture storage */
picture.data[0] = pict_buffer;
picture.data[1] = picture.data[0] + width * height;
picture.data[2] = picture.data[1] + (width * height) / 4;
picture.linesize[0] = width;
picture.linesize[1] = width / 2;
picture.linesize[2] = width / 2;
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
if (enc->codec_type == CODEC_TYPE_VIDEO) {
int n1, n2, nb;
/* feed each codec with its requested frame rate */
n1 = ((INT64)frame_number * enc->frame_rate) / frame_rate;
n2 = (((INT64)frame_number + 1) * enc->frame_rate) / frame_rate;
nb = n2 - n1;
if (nb > 0) {
/* resize the picture if needed */
if (ost->video_resample) {
picture1 = &ost->pict_tmp;
img_resample(ost->img_resample_ctx,
picture1, &picture);
} else {
picture1 = &picture;
}
ret = avcodec_encode_video(enc, video_buffer,
sizeof(video_buffer),
picture1);
s->format->write_packet(s, ost->index, video_buffer, ret);
}
}
}
frame_number++;
}
/* write report */
{
char buf[1024];
INT64 total_size;
float ti, bitrate;
static float last_ti;
INT64 ti1;
total_size = url_ftell(&s->pb);
ti1 = gettime() - time_start;
/* check elapsed time */
if (recording_time && ti1 >= recording_time)
break;
ti = ti1 / 1000000.0;
if (ti < 0.1)
ti = 0.1;
/* dispaly twice per second */
if ((ti - last_ti) >= 0.5) {
last_ti = ti;
bitrate = (int)((total_size * 8) / ti / 1000.0);
buf[0] = '\0';
if (use_video) {
sprintf(buf + strlen(buf), "frame=%5d fps=%4.1f q=%2d ",
frame_number, (float)frame_number / ti, first_video_enc->quality);
}
sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s",
total_size / 1024, ti, bitrate);
fprintf(stderr, "%s \r", buf);
fflush(stderr);
}
}
}
term_exit();
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
enc = &ost->st->codec;
avcodec_close(enc);
}
s->format->write_trailer(s);
if (audio_handle)
url_close(audio_handle);
if (video_handle)
url_close(video_handle);
/* write report */
{
float ti, bitrate;
INT64 total_size;
total_size = url_ftell(&s->pb);
ti = (gettime() - time_start) / 1000000.0;
if (ti < 0.1)
ti = 0.1;
bitrate = (int)((total_size * 8) / ti / 1000.0);
fprintf(stderr, "\033[K\nTotal time = %0.1f s, %Ld KBytes, %0.1f kbits/s\n",
ti, total_size / 1024, bitrate);
if (use_video) {
fprintf(stderr, "Total frames = %d\n", frame_number);
}
}
ret = 0;
fail1:
if (picture_in_buf)
free(picture_in_buf);
if (picture_420p)
free(picture_420p);
for(i=0;i<s->nb_streams;i++) {
ost = ost_table[i];
if (ost) {
if (ost->fifo.buffer)
fifo_free(&ost->fifo);
if (ost->pict_tmp.data[0])
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);
free(ost);
}
}
return ret;
fail:
ret = -ENOMEM;
goto fail1;
}
int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
int i;
AVFormatContext *ic;
ic = av_open_input_file(filename, FFM_PACKET_SIZE);
if (!ic)
return -EIO;
/* 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->codec_id != CODEC_ID_PCM) {
/* 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->format->write_packet(s, ost->index, audio_out, ret);
}
} else {
/* XXX: handle endianness */
s->format->write_packet(s, ost->index, buftmp, size_out);
}
}
/* write a picture to a raw mux */
static void write_picture(AVFormatContext *s, int index, AVPicture *picture, 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 */
size = (w * h) * 3 / 2;
buf = malloc(size);
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];
}
}
s->format->write_packet(s, index, buf, size);
free(buf);
}
static void do_video_out(AVFormatContext *s,
AVOutputStream *ost,
AVInputStream *ist,
AVPicture *pict)
{
int n1, n2, nb, i, ret, frame_number;
AVPicture *picture;
UINT8 video_buffer[128*1024];
AVCodecContext *enc;
enc = &ost->st->codec;
frame_number = ist->frame_number;
/* first drop frame if needed */
n1 = ((INT64)frame_number * enc->frame_rate) / ist->st->codec.frame_rate;
n2 = (((INT64)frame_number + 1) * enc->frame_rate) / ist->st->codec.frame_rate;
nb = n2 - n1;
if (nb <= 0)
return;
if (ost->video_resample) {
picture = &ost->pict_tmp;
img_resample(ost->img_resample_ctx, picture, pict);
} else {
picture = pict;
}
/* 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) {
ost->st->codec.quality = ist->st->codec.quality;
}
ret = avcodec_encode_video(&ost->st->codec,
video_buffer, sizeof(video_buffer),
picture);
s->format->write_packet(s, ost->index, video_buffer, ret);
} else {
write_picture(s, ost->index, picture, enc->width, enc->height);
}
}
}
//#define HEX_DUMP
#ifdef HEX_DUMP
static void hex_dump(UINT8 *buf, int size)
{
int len, i, j, c;
for(i=0;i<size;i+=16) {
len = size - i;
if (len > 16)
len = 16;
printf("%08x ", i);
for(j=0;j<16;j++) {
if (j < len)
printf(" %02x", buf[i+j]);
else
printf(" ");
}
printf(" ");
for(j=0;j<len;j++) {
c = buf[i+j];
if (c < ' ' || c > '~')
c = '.';
printf("%c", c);
}
printf("\n");
}
}
#endif
/*
* 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, 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[nb_input_files];
memset(file_table, 0, sizeof(file_table));
/* input stream init */
j = 0;
for(i=0;i<nb_input_files;i++) {
is = input_files[i];
file_table[i].ist_index = j;
j += is->nb_streams;
}
nb_istreams = j;
ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
if (!ist_table)
return -ENOMEM;
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 (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 */
} 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 {
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 = 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;
}
}
/* 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);
}
}
}
/* 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];
os->format->write_header(os);
}
start_time = gettime();
min_pts = 0;
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];
/* select the input file with the smallest pts */
redo:
file_index = -1;
min_pts = (1ULL << 63) - 1;
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (!ist->discard && !file_table[ist->file_index].eof_reached && ist->pts < min_pts) {
min_pts = ist->pts;
file_index = ist->file_index;
}
}
/* if none, if is finished */
if (file_index < 0)
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;
}
ist_index = file_table[file_index].ist_index + pkt.stream_index;
ist = ist_table[ist_index];
if (ist->discard) {
continue;
}
#ifdef HEX_DUMP
printf("stream #%d, size=%d:\n", pkt.stream_index, pkt.size);
hex_dump(pkt.data, pkt.size);
#endif
// 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:
if (ist->st->codec.codec_id == CODEC_ID_PCM) {
/* no need to call a codec */
data_buf = ptr;
data_size = len;
ret = len;
} else {
ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
ptr, len);
if (ret < 0)
goto fail_decode;
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);
picture.data[0] = ptr;
picture.data[1] = picture.data[0] + size;
picture.data[2] = picture.data[1] + size / 4;
picture.linesize[0] = ist->st->codec.width;
picture.linesize[1] = ist->st->codec.width / 2;
picture.linesize[2] = ist->st->codec.width / 2;
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;
}
/* 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->sample_index += data_size / (2 * ist->st->codec.channels);
break;
case CODEC_TYPE_VIDEO:
ist->frame_number++;
ist->pts = ((INT64)ist->frame_number * 1000000 * FRAME_RATE_BASE) /
ist->st->codec.frame_rate;
break;
}
ptr += ret;
len -= ret;
/* transcode raw format, encode packets and output them */
for(i=0;i<nb_ostreams;i++) {
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);
break;
}
} else {
/* no reencoding needed : output the packet directly */
os->format->write_packet(os, ost->index, data_buf, data_size);
}
}
}
}
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 = (1ULL << 63) - 1;
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);
vid = 1;
}
/* compute min pts value */
if (!ist->discard && ist->pts < ti) {
ti = ist->pts;
}
}
ti1 = ti / 1000000.0;
if (ti1 < 0.1)
ti1 = 0.1;
bitrate = (double)(total_size * 8) / ti1 / 1000.0;
sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s",
total_size / 1024, ti1, bitrate);
fprintf(stderr, "%s \r", buf);
fflush(stderr);
}
}
}
/* 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 = (1ULL << 63) - 1;
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);
vid = 1;
}
/* compute min pts value */
if (!ist->discard && ist->pts < ti) {
ti = ist->pts;
}
}
ti1 = ti / 1000000.0;
if (ti1 < 0.1)
ti1 = 0.1;
bitrate = (double)(total_size * 8) / ti1 / 1000.0;
sprintf(buf + strlen(buf), "size=%8LdkB time=%0.1f bitrate=%6.1fkbits/s",
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];
os->format->write_trailer(os);
}
/* finished ! */
ret = 0;
fail1:
if (ist_table) {
for(i=0;i<nb_istreams;i++) {
ist = ist_table[i];
if (ist) {
free(ist);
}
}
free(ist_table);
}
if (ost_table) {
for(i=0;i<nb_ostreams;i++) {
ost = ost_table[i];
if (ost) {
if (ost->pict_tmp.data[0])
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);
free(ost);
}
}
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 Gerard Lantau\n"
"This program is free software; you can redistribute it and/or modify\n"
"it under the terms of the GNU General Public License as published by\n"
"the Free Software Foundation; either version 2 of the License, or\n"
"(at your option) any later version.\n"
"\n"
"This program 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\n"
"GNU General Public License for more details.\n"
"\n"
"You should have received a copy of the GNU General Public License\n"
"along with this program; if not, write to the Free Software\n"
"Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.\n"
);
exit(1);
}
void opt_format(const char *arg)
{
AVFormat *f;
f = first_format;
while (f != NULL && strcmp(f->name, arg) != 0) f = f->next;
if (f == NULL) {
fprintf(stderr, "Invalid format: %s\n", arg);
exit(1);
}
file_format = f;
}
void opt_video_bitrate(const char *arg)
{
video_bit_rate = 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_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_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",
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++;
}
motion_estimation_method = p - motion_str;
}
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(arg, (char **)&p, 0);
}
void opt_recording_time(const char *arg)
{
recording_time = parse_date(arg, 1);
}
/* return the number of packet read to find the codec parameters */
int find_codec_parameters(AVFormatContext *ic)
{
int val, i, count, ret, got_picture, size;
AVCodec *codec;
AVCodecContext *enc;
AVStream *st;
AVPacket *pkt;
AVPicture picture;
AVPacketList *pktl, **ppktl;
short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
UINT8 *ptr;
count = 0;
ppktl = &ic->packet_buffer;
for(;;) {
for(i=0;i<ic->nb_streams;i++) {
enc = &ic->streams[i]->codec;
switch(enc->codec_type) {
case CODEC_TYPE_AUDIO:
val = enc->sample_rate;
break;
case CODEC_TYPE_VIDEO:
val = enc->width;
break;
default:
val = 1;
break;
}
/* if no parameters supplied, then we should read it from
the stream */
if (val == 0)
break;
}
if (i == ic->nb_streams) {
ret = count;
break;
}
if (count == 0) {
/* open each codec */
for(i=0;i<ic->nb_streams;i++) {
st = ic->streams[i];
codec = avcodec_find_decoder(st->codec.codec_id);
if (codec == NULL) {
ret = -1;
goto the_end;
}
avcodec_open(&st->codec, codec);
}
}
pktl = av_mallocz(sizeof(AVPacketList));
if (!pktl) {
ret = -1;
break;
}
/* add the packet in the buffered packet list */
*ppktl = pktl;
ppktl = &pktl->next;
pkt = &pktl->pkt;
if (ic->format->read_packet(ic, pkt) < 0) {
ret = -1;
break;
}
st = ic->streams[pkt->stream_index];
/* decode the data and update codec parameters */
ptr = pkt->data;
size = pkt->size;
while (size > 0) {
switch(st->codec.codec_type) {
case CODEC_TYPE_VIDEO:
ret = avcodec_decode_video(&st->codec, &picture, &got_picture, ptr, size);
break;
case CODEC_TYPE_AUDIO:
ret = avcodec_decode_audio(&st->codec, samples, &got_picture, ptr, size);
break;
default:
ret = -1;
break;
}
if (ret < 0) {
ret = -1;
goto the_end;
}
if (got_picture)
break;
ptr += ret;
size -= ret;
}
count++;
}
the_end:
if (count > 0) {
/* close each codec */
for(i=0;i<ic->nb_streams;i++) {
st = ic->streams[i];
avcodec_close(&st->codec);
}
}
return ret;
}
void opt_input_file(const char *filename)
{
AVFormatContext *ic;
AVFormatParameters params, *ap = &params;
URLFormat url_format;
AVFormat *fmt;
int err, i, ret;
ic = av_mallocz(sizeof(AVFormatContext));
strcpy(ic->filename, filename);
/* first format guess to know if we must open file */
fmt = file_format;
if (!fmt)
fmt = guess_format(NULL, filename, NULL);
if (fmt == NULL || !(fmt->flags & AVFMT_NOFILE)) {
/* open file */
if (url_fopen(&ic->pb, filename, URL_RDONLY) < 0) {
fprintf(stderr, "Could not open '%s'\n", filename);
exit(1);
}
/* find format and set default parameters */
fmt = file_format;
err = url_getformat(url_fileno(&ic->pb), &url_format);
if (err >= 0) {
if (!fmt)
fmt = guess_format(url_format.format_name, NULL, NULL);
ap->sample_rate = url_format.sample_rate;
ap->frame_rate = url_format.frame_rate;
ap->channels = url_format.channels;
ap->width = url_format.width;
ap->height = url_format.height;
ap->pix_fmt = url_format.pix_fmt;
} else {
if (!fmt)
fmt = guess_format(NULL, filename, NULL);
memset(ap, 0, sizeof(*ap));
}
} else {
memset(ap, 0, sizeof(*ap));
}
if (!fmt || !fmt->read_header) {
fprintf(stderr, "%s: Unknown file format\n", filename);
exit(1);
}
ic->format = fmt;
/* get default parameters from command line */
if (!ap->sample_rate)
ap->sample_rate = audio_sample_rate;
if (!ap->channels)
ap->channels = audio_channels;
if (!ap->frame_rate)
ap->frame_rate = frame_rate;
if (!ap->width)
ap->width = frame_width;
if (!ap->height)
ap->height = frame_height;
err = ic->format->read_header(ic, ap);
if (err < 0) {
fprintf(stderr, "%s: Error while parsing header\n", filename);
exit(1);
}
/* If not enough info for the codecs, we decode the first frames
to get it. (used in mpeg case for example) */
ret = find_codec_parameters(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:
audio_channels = enc->channels;
audio_sample_rate = enc->sample_rate;
break;
case CODEC_TYPE_VIDEO:
frame_height = enc->height;
frame_width = enc->width;
frame_rate = enc->frame_rate;
break;
}
}
input_files[nb_input_files] = ic;
/* dump the file content */
dump_format(ic, nb_input_files, filename, 0);
nb_input_files++;
file_format = NULL;
}
void opt_output_file(const char *filename)
{
AVStream *st;
AVFormatContext *oc;
int use_video, use_audio, nb_streams;
int codec_id;
if (!strcmp(filename, "-"))
filename = "pipe:";
oc = av_mallocz(sizeof(AVFormatContext));
if (!file_format) {
file_format = guess_format(NULL, filename, NULL);
if (!file_format)
file_format = &mpeg_mux_format;
}
oc->format = file_format;
if (!strcmp(file_format->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_format->video_codec != CODEC_ID_NONE;
use_audio = file_format->audio_codec != CODEC_ID_NONE;
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_format->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->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;
}
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_format->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;
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 selected\n");
exit(1);
}
if (str_title)
nstrcpy(oc->title, sizeof(oc->title), str_title);
if (str_author)
nstrcpy(oc->author, sizeof(oc->author), str_author);
if (str_copyright)
nstrcpy(oc->copyright, sizeof(oc->copyright), str_copyright);
if (str_comment)
nstrcpy(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);
if (!(oc->format->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_format = NULL;
audio_disable = 0;
video_disable = 0;
audio_codec_id = CODEC_ID_NONE;
video_codec_id = CODEC_ID_NONE;
}
void show_formats(void)
{
AVFormat *f;
URLProtocol *up;
AVCodec *p;
const char **pp;
printf("File formats:\n");
printf(" Encoding:");
for(f = first_format; f != NULL; f = f->next) {
if (f->write_header)
printf(" %s", f->name);
}
printf("\n");
printf(" Decoding:");
for(f = first_format; f != NULL; f = f->next) {
if (f->read_header)
printf(" %s", f->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) == ME_ZERO)
printf("(fastest)");
else if ((pp - motion_str) == ME_FULL)
printf("(slowest)");
else if ((pp - motion_str) == ME_LOG)
printf("(default)");
pp++;
}
printf("\n");
exit(1);
}
void show_help(void)
{
const OptionDef *po;
int i, expert;
printf("ffmpeg version " FFMPEG_VERSION ", Copyright (c) 2000,2001 Gerard Lantau\n"
"usage: ffmpeg [[options] -i input_file]... {[options] outfile}...\n"
"Hyper fast MPEG1/MPEG4/H263/RV and AC3/MPEG audio encoder\n"
"\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, {show_licence}, "show license" },
{ "h", 0, {show_help}, "show help" },
{ "formats", 0, {show_formats}, "show available formats, codecs, protocols, ..." },
{ "f", HAS_ARG, {opt_format}, "force format", "fmt" },
{ "i", HAS_ARG, {opt_input_file}, "input file name", "filename" },
{ "y", OPT_BOOL, {int_arg:&file_overwrite}, "overwrite output files" },
{ "map", HAS_ARG | OPT_EXPERT, {opt_map}, "set input stream mapping", "file:stream" },
{ "t", HAS_ARG, {opt_recording_time}, "set the recording time", "duration" },
{ "title", HAS_ARG | OPT_STRING, {str_arg: &str_title}, "set the title", "string" },
{ "author", HAS_ARG | OPT_STRING, {str_arg: &str_author}, "set the author", "string" },
{ "copyright", HAS_ARG | OPT_STRING, {str_arg: &str_copyright}, "set the copyright", "string" },
{ "comment", HAS_ARG | OPT_STRING, {str_arg: &str_comment}, "set the comment", "string" },
/* video options */
{ "b", HAS_ARG, {opt_video_bitrate}, "set video bitrate (in kbit/s)", "bitrate" },
{ "r", HAS_ARG, {opt_frame_rate}, "set frame rate (in Hz)", "rate" },
{ "s", HAS_ARG, {opt_frame_size}, "set frame size (WxH or abbreviation)", "size" },
{ "g", HAS_ARG | OPT_EXPERT, {opt_gop_size}, "set the group of picture size", "gop_size" },
{ "intra", OPT_BOOL | OPT_EXPERT, {int_arg: &intra_only}, "use only intra frames"},
{ "vn", OPT_BOOL, {int_arg: &video_disable}, "disable video" },
{ "qscale", HAS_ARG | OPT_EXPERT, {opt_qscale}, "use fixed video quantiser scale (VBR)", "q" },
{ "vd", HAS_ARG | OPT_EXPERT, {opt_video_device}, "set video device", "device" },
{ "vcodec", HAS_ARG | OPT_EXPERT, {opt_video_codec}, "force video codec", "codec" },
{ "me", HAS_ARG | OPT_EXPERT, {opt_motion_estimation}, "set motion estimation method",
"method" },
{ "sameq", OPT_BOOL, {int_arg: &same_quality},
"use same video quality as source (implies VBR)" },
/* audio options */
{ "ab", HAS_ARG, {opt_audio_bitrate}, "set audio bitrate (in kbit/s)", "bitrate", },
{ "ar", HAS_ARG, {opt_audio_rate}, "set audio sampling rate (in Hz)", "rate" },
{ "ac", HAS_ARG, {opt_audio_channels}, "set number of audio channels", "channels" },
{ "an", OPT_BOOL, {int_arg: &audio_disable}, "disable audio" },
{ "ad", HAS_ARG | OPT_EXPERT, {opt_audio_device}, "set audio device", "device" },
{ "acodec", HAS_ARG | OPT_EXPERT, {opt_audio_codec}, "force audio codec", "codec" },
{ NULL, },
};
int main(int argc, char **argv)
{
int optindex, i;
const char *opt, *arg;
const OptionDef *po;
register_all();
if (argc <= 1)
show_help();
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 {
opt_output_file(opt);
}
}
if (nb_input_files == 0) {
if (nb_output_files != 1) {
fprintf(stderr, "Only one output file supported when grabbing\n");
exit(1);
}
av_grab(output_files[0]);
} else {
if (nb_output_files <= 0) {
fprintf(stderr, "Must supply at least one output file\n");
exit(1);
}
av_encode(output_files, nb_output_files, input_files, nb_input_files,
stream_maps, nb_stream_maps);
}
/* close files */
for(i=0;i<nb_output_files;i++) {
if (!(output_files[i]->format->flags & AVFMT_NOFILE))
url_fclose(&output_files[i]->pb);
}
for(i=0;i<nb_input_files;i++) {
if (!(input_files[i]->format->flags & AVFMT_NOFILE))
url_fclose(&input_files[i]->pb);
}
return 0;
}