akhaliq/AnimeGANv2 · How to use AnimeganV2 on rectangular photos?

I love this technique, even over some new techniques that use artificial intelligence. But the big problem is that it only applies to square photos or square sections of photos and this involves the additional work of applying AnimeganV2 to square sections and then stitching them together with external software. What changes would have to be made so that it can be used on rectangular photos as they have achieved in this page: https://ailab.wondershare.com/app/general/editor/image?id=735&&code=cpo&&fileType=image