libavformat/utils.c:1363: error: Uninitialized Value
  The value read from pos_max was never initialized.

libavformat/utils.c:1363:5: 
1361. {
1362.     AVInputFormat *avif = s->iformat;
1363.     int64_t av_uninit(pos_min), av_uninit(pos_max), pos, pos_limit;
          ^
1364.     int64_t ts_min, ts_max, ts;
1365.     int index;
