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  1. /*
  2.  * Copyright (c) 2013 Nicolas George
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public License
  8.  * as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14.  * GNU Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public License
  17.  * along with FFmpeg; if not, write to the Free Software Foundation, Inc.,
  18.  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "config.h"
  22. #if HAVE_UNISTD_H
  23. #include <unistd.h>             /* getopt */
  24. #endif
  25.  
  26. #include "libavformat/avformat.h"
  27. #include "libavutil/timestamp.h"
  28.  
  29. #if !HAVE_GETOPT
  30. #include "compat/getopt.c"
  31. #endif
  32.  
  33. static void usage(int ret)
  34. {
  35.     fprintf(ret ? stderr : stdout,
  36.             "Usage: seek_print file [command ...]\n"
  37.             "Commands:\n"
  38.             "    read\n"
  39.             "    seek:stream:min_ts:ts:max_ts:flags\n"
  40.             );
  41.     exit(ret);
  42. }
  43.  
  44. int main(int argc, char **argv)
  45. {
  46.     int opt, ret, stream, flags;
  47.     const char *filename;
  48.     AVFormatContext *avf = NULL;
  49.     int64_t min_ts, max_ts, ts;
  50.     AVPacket packet;
  51.  
  52.     while ((opt = getopt(argc, argv, "h")) != -1) {
  53.         switch (opt) {
  54.         case 'h':
  55.             usage(0);
  56.         default:
  57.             usage(1);
  58.         }
  59.     }
  60.     argc -= optind;
  61.     argv += optind;
  62.     if (!argc)
  63.         usage(1);
  64.     filename = *argv;
  65.     argv++;
  66.     argc--;
  67.  
  68.     av_register_all();
  69.     if ((ret = avformat_open_input(&avf, filename, NULL, NULL)) < 0) {
  70.         fprintf(stderr, "%s: %s\n", filename, av_err2str(ret));
  71.         return 1;
  72.     }
  73.     if ((ret = avformat_find_stream_info(avf, NULL)) < 0) {
  74.         fprintf(stderr, "%s: could not find codec parameters: %s\n", filename,
  75.                 av_err2str(ret));
  76.         return 1;
  77.     }
  78.  
  79.     for (; argc; argc--, argv++) {
  80.         if (!strcmp(*argv, "read")) {
  81.             ret = av_read_frame(avf, &packet);
  82.             if (ret < 0) {
  83.                 printf("read: %d (%s)\n", ret, av_err2str(ret));
  84.             } else {
  85.                 AVRational *tb = &avf->streams[packet.stream_index]->time_base;
  86.                 printf("read: %d size=%d stream=%d dts=%s (%s) pts=%s (%s)\n",
  87.                        ret, packet.size, packet.stream_index,
  88.                        av_ts2str(packet.dts), av_ts2timestr(packet.dts, tb),
  89.                        av_ts2str(packet.pts), av_ts2timestr(packet.pts, tb));
  90.                 av_free_packet(&packet);
  91.             }
  92.         } else if (sscanf(*argv, "seek:%i:%"SCNi64":%"SCNi64":%"SCNi64":%i",
  93.                    &stream, &min_ts, &ts, &max_ts, &flags) == 5) {
  94.             ret = avformat_seek_file(avf, stream, min_ts, ts, max_ts, flags);
  95.             printf("seek: %d (%s)\n", ret, av_err2str(ret));
  96.         } else {
  97.             fprintf(stderr, "'%s': unknown command\n", *argv);
  98.             return 1;
  99.         }
  100.     }
  101.  
  102.     avformat_close_input(&avf);
  103.  
  104.     return 0;
  105. }
  106.