seems I pass this one ok, https://thisaintnews.com/view/picture/138385/downscale-test
Thanks to https://metacpan.org/pod/Imager
Although I passed this one no problems, I find animated gifs to be the worst thing to resize, especially the ones where the changes are part of a layer over another layer
e.g. look at this one in gimp/photoshop
https://thisaintnews.com/static/user/pics/1218067200/1218395...
layer two is just enough to cover layer one and make the hand move, the rest is transparent. but at least the layers are the same size
some animated gifs have the new layer not the same canvas size as the layer underneath, so you have to adjust the layer offsets correctly or they end up all over the place
Infact I have a few evil gifs for testing this
https://thisaintnews.com/view/picture/138386/test-gif-1
https://thisaintnews.com/view/picture/137264/test-gif-2
https://thisaintnews.com/view/picture/137265/test-gif-3
https://thisaintnews.com/view/picture/138387/test-gif-4
I can't remember the exact differences, but I do remember they go from easy to hard to resize correctly