it's me again with my audio player. This is kinda a continuation of my previous question... (link here)

Along with my question above, i've been tinkering with the song title/artist/thumbnail metadata, and I've succeeded with the title and artist. But for some reason, I can't seem to figure out how to display the thumbnail. I've looked at every guide and all, but the only thing I can find that's different between our codes is the fact that I don't have the image sizes specified. Now, I have a genuine reason for this, which is that I have inconsistent image sizes and thus cannot add the sizes (I have tried, with EVERY size used specified, never worked!)

Can someone tell me any alternatives to this or how to fix this (in a way that doesn't need me to go on a 5 hour montage editing the sizes of 118 images)?