libavcodec/mpegvideo.c:867: error: Uninitialized Value
  The value read from yc_size was never initialized.

libavcodec/mpegvideo.c:867:13: 
865.             /* dc values */
866.             // MN: we need these for  error resilience of intra-frames
867.             FF_ALLOCZ_OR_GOTO(s->avctx, s->dc_val_base,
                 ^
868.                               yc_size * sizeof(int16_t), fail);
869.             s->dc_val[0] = s->dc_val_base + s->b8_stride + 1;
