[gentoo-user] {OT} convert all .png to 0 compression

[Grant]

My music folder is filled with images like this:

artist/album/cover.png
artist/album/CD/front.png
artist/album/CD/back.png

I think gmpc is struggling with all of the decompression so I'd like
to change all of their compression to 0.  Does anyone know of an easy
way to do this?

- Grant