libavcodec/mpegvideo.c:817: error: Uninitialized Value
  The value read from mb_array_size was never initialized.

libavcodec/mpegvideo.c:817:9: 
815. 
816.     if (s->width && s->height) {
817.         FF_ALLOC_OR_GOTO(s->avctx, s->er_temp_buffer,
             ^
818.                          mb_array_size * sizeof(uint8_t), fail);
819.         FF_ALLOCZ_OR_GOTO(s->avctx, s->error_status_table,
