VAR_SH            594 libavfilter/vf_blend.c     values[VAR_SH] = td->h / (double)td->dst->height;
VAR_SH            387 libavfilter/vf_geq.c     values[VAR_SH] = geq->values[VAR_SH];
VAR_SH            448 libavfilter/vf_geq.c         geq->values[VAR_SH] = height / (double)inlink->h;