func: static int write_fragments(struct Tracks *tracks, int start_index,
  
                             AVIOContext *in)
  
  {
  
      char dirname[100], filename[500];
  
      int i, j;
  
  
  
      for (i = start_index; i < tracks->nb_tracks; i++) {
  
          struct Track *track = tracks->tracks[i];
  
          const char *type    = track->is_video ? "video" : "audio";
  
          snprintf(dirname, sizeof(dirname), "QualityLevels(%d)", track->bitrate);
  
          mkdir(dirname, 0777);
  
          for (j = 0; j < track->chunks; j++) {
  
              snprintf(filename, sizeof(filename), "%s/Fragments(%s=%"PRId64")",
  
                       dirname, type, track->offsets[j].time);
  
              avio_seek(in, track->offsets[j].offset, SEEK_SET);
  
              write_fragment(filename, in);
  
          }
  
      }
  
      return 0;
  
  }
  