libavcodec/h264.c:1025: error: Uninitialized Value
  The value read from ref[_] was never initialized.

libavcodec/h264.c:1025:12: 
1023.         }
1024. 
1025.         if(ref[1] < 0){
                 ^
1026.             if(!is_b8x8)
1027.                 *mb_type &= ~MB_TYPE_L1;
