libavcodec/mpegvideo.c:642: error: Uninitialized Value
  The value read from yc_size was never initialized.

libavcodec/mpegvideo.c:642:13: 
640.             /* dc values */
641.             //MN: we need these for error resilience of intra-frames
642.             FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base, yc_size * sizeof(int16_t), fail);
                 ^
643.             s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
644.             s->dc_val[1] = s->dc_val_base + y_size + s->mb_stride + 1;
