libavcodec/h264_direct.c:340: error: Uninitialized Value
  The value read from mv[_] was never initialized.

libavcodec/h264_direct.c:340:17: 
338.                 h->sub_mb_type[i8] = sub_mb_type;
339. 
340.                 fill_rectangle(&h->mv_cache[0][scan8[i8*4]], 2, 2, 8, mv[0], 4);
                     ^
341.                 fill_rectangle(&h->mv_cache[1][scan8[i8*4]], 2, 2, 8, mv[1], 4);
342.                 fill_rectangle(&h->ref_cache[0][scan8[i8*4]], 2, 2, 8, (uint8_t)ref[0], 1);
