libavcodec/h264_direct.c:256: error: Uninitialized Value
  The value read from mv[_] was never initialized.

libavcodec/h264_direct.c:256:11: 
254.     }
255. 
256.     if (!(is_b8x8 | mv[0] | mv[1])) {
               ^
257.         fill_rectangle(&sl->ref_cache[0][scan8[0]], 4, 4, 8, (uint8_t)ref[0], 1);
258.         fill_rectangle(&sl->ref_cache[1][scan8[0]], 4, 4, 8, (uint8_t)ref[1], 1);
