libavcodec/motionpixels.c:244: error: Uninitialized Value
  The value read from p.y was never initialized.

libavcodec/motionpixels.c:244:13: 
242.             p = mp_get_yuv_from_rgb(mp, 0, y);
243.         } else {
244.             p.y += mp_gradient(mp, 0, mp_get_vlc(mp, gb));
                 ^
245.             p.y = av_clip_uintp2(p.y, 5);
246.             if ((y & 3) == 0) {
