libavcodec/mpegvideo.c:655: error: Uninitialized Value
  The value read from mb_array_size was never initialized.

libavcodec/mpegvideo.c:655:9: 
653. 
654.         /* init macroblock skip table */
655.         FF_ALLOCZ_OR_GOTO(s->avctx, s->mbskip_table, mb_array_size+2, fail);
             ^
656.         //Note the +1 is for a quicker mpeg4 slice_end detection
657.         FF_ALLOCZ_OR_GOTO(s->avctx, s->prev_pict_types, PREV_PICT_TYPES_BUFFER_SIZE, fail);
