Gentoo overlay for the grate-driver projects. Add the grate-overlay to layman and enjoy!
layman -f -o https://raw.githubusercontent.com/grate-driver/grate-overlay/master/overlay.xml -a grate-overlay
Add -vdpau to /etc/portage/profile/use.mask, otherwise portage will ignore vdpau useflag as it is masked by the default ARM profile.