libavformat/mpeg.c:308: error: Uninitialized Value
  The value read from c was never initialized.

libavformat/mpeg.c:308:9: 
306.         len -= 2;
307.     }
308.     if ((c & 0xe0) == 0x20) {
             ^
309.         dts = pts = get_pts(s->pb, c);
310.         len -= 4;
