libavcodec/h264_direct.c:395: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264_direct.c:395:17: 
393.               h->sei.unregistered.x264_build > 33U))) {
394.             a = b = 0;
395.             if (ref[0] > 0)
                     ^
396.                 a = mv[0];
397.             if (ref[1] > 0)
