text: /*
   * Copyright (c) 2005 Francois Revol
   *
   * 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 <limits.h>
  #include <fcntl.h>
  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>
  #include <unistd.h>
  #include "libavformat/avformat.h"
  
  #define PKTFILESUFF "_%08"PRId64"_%02d_%010"PRId64"_%06d_%c.bin"
  
  #undef strcat
  
  static int usage(int ret)
  {
      fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
      fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
      fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");
      fprintf(stderr, "-n\twrite No file at all, only demux.\n");
      fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");
      return ret;
  }
  
  int main(int argc, char **argv)
  {
      char fntemplate[PATH_MAX];
      char pktfilename[PATH_MAX];
      AVFormatContext *fctx;
      AVPacket pkt;
      int64_t pktnum = 0;
      int64_t maxpkts = 0;
      int donotquit = 0;
      int nowrite = 0;
      int err;
  
      if ((argc > 1) && !strncmp(argv[1], "-", 1)) {
          if (strchr(argv[1], 'w'))
              donotquit = 1;
          if (strchr(argv[1], 'n'))
              nowrite = 1;
          argv++;
          argc--;
      }
      if (argc < 2)
          return usage(1);
      if (argc > 2)
          maxpkts = atoi(argv[2]);
      strncpy(fntemplate, argv[1], PATH_MAX-1);
      if (strrchr(argv[1], '/'))
          strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);
      if (strrchr(fntemplate, '.'))
          *strrchr(fntemplate, '.') = '\0';
      if (strchr(fntemplate, '%')) {
          fprintf(stderr, "can't use filenames containing '%%'\n");
          return usage(1);
      }
      if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {
          fprintf(stderr, "filename too long\n");
          return usage(1);
      }
      strcat(fntemplate, PKTFILESUFF);
      printf("FNTEMPLATE: '%s'\n", fntemplate);
  
      // register all file formats
      av_register_all();
  
      err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);
      if (err < 0) {
          fprintf(stderr, "av_open_input_file: error %d\n", err);
          return 1;
      }
  
      err = av_find_stream_info(fctx);
      if (err < 0) {
          fprintf(stderr, "av_find_stream_info: error %d\n", err);
          return 1;
      }
  
      av_init_packet(&pkt);
  
      while ((err = av_read_frame(fctx, &pkt)) >= 0) {
          int fd;
          snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
          printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
          //printf("open(\"%s\")\n", pktfilename);
          if (!nowrite) {
              fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
              write(fd, pkt.data, pkt.size);
              close(fd);
          }
          pktnum++;
          if (maxpkts && (pktnum >= maxpkts))
              break;
      }
  
      while (donotquit)
          sleep(60);
  
      return 0;
  }
  