libavcodec/interplayvideo.c:768: error: Uninitialized Value
  The value read from P[_] was never initialized.

libavcodec/interplayvideo.c:768:21: 
766.                 for (x = 0; x < 8; x += 2, flags >>= 2) {
767.                     pixel_ptr[x    ] =
768.                     pixel_ptr[x + 1] = P[flags & 0x03];
                         ^
769.                 }
770.                 pixel_ptr += s->stride;
