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/*
* Copyright (c) 2003 Fabrice Bellard
* Copyright (c) 2007 Michael Niedermayer
*
* This file is part of FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include "libavformat/avformat.h"
#undef exit
int main(int argc, char **argv)
{
const char *filename;
AVFormatContext *ic;
int i, ret, stream_id;
int64_t timestamp;
AVFormatParameters params, *ap= ¶ms;
memset(ap, 0, sizeof(params));
ap->channels=1;
ap->sample_rate= 22050;
/* initialize libavcodec, and register all codecs and formats */
av_register_all();
if (argc != 2) {
printf("usage: %s input_file\n"
"\n", argv[0]);
exit(1);
}
filename = argv[1];
/* allocate the media context */
ic = avformat_alloc_context();
if (!ic) {
fprintf(stderr, "Memory error\n");
exit(1);
}
ret = av_open_input_file(&ic, filename, NULL, 0, ap);
if (ret < 0) {
fprintf(stderr, "cannot open %s\n", filename);
exit(1);
}
ret = av_find_stream_info(ic);
if (ret < 0) {
fprintf(stderr, "%s: could not find codec parameters\n", filename);
exit(1);
}
for(i=0; ; i++){
AVPacket pkt;
AVStream *st;
memset(&pkt, 0, sizeof(pkt));
if(ret>=0){
ret= av_read_frame(ic, &pkt);
printf("ret:%2d", ret);
if(ret>=0){
st= ic->streams[pkt.stream_index];
printf(" st:%2d dts:%f pts:%f pos:%" PRId64 " size:%d flags:%d", pkt.stream_index, pkt.dts*av_q2d(st->time_base), pkt.pts*av_q2d(st->time_base), pkt.pos, pkt.size, pkt.flags);
}
printf("\n");
}
if(i>25) break;
stream_id= (i>>1)%(ic->nb_streams+1) - 1;
timestamp= (i*19362894167LL) % (4*AV_TIME_BASE) - AV_TIME_BASE;
if(stream_id>=0){
st= ic->streams[stream_id];
timestamp= av_rescale_q(timestamp, AV_TIME_BASE_Q, st->time_base);
}
ret = av_seek_frame(ic, stream_id, timestamp, (i&1)*AVSEEK_FLAG_BACKWARD);
printf("ret:%2d st:%2d ts:%f flags:%d\n", ret, stream_id, timestamp*(stream_id<0 ? 1.0/AV_TIME_BASE : av_q2d(st->time_base)), i&1);
}
return 0;
}
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