aac5773f
 hucm
功能基本完成，接口待打磨
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/*
* Copyright (c) 2013 Nicolas George
*
* 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 "config.h"
#if HAVE_UNISTD_H
#include <unistd.h> /* getopt */
#endif
#include "libavformat/avformat.h"
#include "libavutil/timestamp.h"
#if !HAVE_GETOPT
#include "compat/getopt.c"
#endif
static void usage(int ret)
{
fprintf(ret ? stderr : stdout,
"Usage: seek_print file [command ...]\n"
"Commands:\n"
" read\n"
" seek:stream:min_ts:ts:max_ts:flags\n"
);
exit(ret);
}
int main(int argc, char **argv)
{
int opt, ret, stream, flags;
const char *filename;
AVFormatContext *avf = NULL;
int64_t min_ts, max_ts, ts;
AVPacket packet;
while ((opt = getopt(argc, argv, "h")) != -1) {
switch (opt) {
case 'h':
usage(0);
default:
usage(1);
}
}
argc -= optind;
argv += optind;
if (!argc)
usage(1);
filename = *argv;
argv++;
argc--;
if ((ret = avformat_open_input(&avf, filename, NULL, NULL)) < 0) {
fprintf(stderr, "%s: %s\n", filename, av_err2str(ret));
return 1;
}
if ((ret = avformat_find_stream_info(avf, NULL)) < 0) {
fprintf(stderr, "%s: could not find codec parameters: %s\n", filename,
av_err2str(ret));
return 1;
}
for (; argc; argc--, argv++) {
if (!strcmp(*argv, "read")) {
ret = av_read_frame(avf, &packet);
if (ret < 0) {
printf("read: %d (%s)\n", ret, av_err2str(ret));
} else {
AVRational *tb = &avf->streams[packet.stream_index]->time_base;
printf("read: %d size=%d stream=%d dts=%s (%s) pts=%s (%s)\n",
ret, packet.size, packet.stream_index,
av_ts2str(packet.dts), av_ts2timestr(packet.dts, tb),
av_ts2str(packet.pts), av_ts2timestr(packet.pts, tb));
av_packet_unref(&packet);
}
} else if (sscanf(*argv, "seek:%i:%"SCNi64":%"SCNi64":%"SCNi64":%i",
&stream, &min_ts, &ts, &max_ts, &flags) == 5) {
ret = avformat_seek_file(avf, stream, min_ts, ts, max_ts, flags);
printf("seek: %d (%s)\n", ret, av_err2str(ret));
} else {
fprintf(stderr, "'%s': unknown command\n", *argv);
return 1;
}
}
avformat_close_input(&avf);
return 0;
}
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