It isn't specified what the resolution for screenshots from N64 roms should be for uploading a screenshot. What is it? -TeK
We don't know ourselves really, it's a TV screen device so it will have to be 4:3 ratio. But the current code was never really meant to work for many systems only GBA so when I expanded it to many systems it was sort of more of a hack than a rewrite. That in turn made it a little hard to work with; so systems where the screenshot will need a thumbnail and a full image aren't supported yet.
Yeah I know that, and as I said, we don't know what it's going to be. Therefore it isn't supported yet.