scale->slice_y = link->dst->outputs[0]->h;
if(scale->interlaced>0 || (scale->interlaced<0 && link->cur_buf->video->interlaced)){
- av_assert0(y%4 == 0);
+ av_assert0(y%(2<<scale->vsub) == 0);
out_h = scale_slice(link, scale->isws[0], y, (h+1)/2, 2, 0);
out_h+= scale_slice(link, scale->isws[1], y, h /2, 2, 1);
}else{