Some radeons can use VDPAU (UVD2) and VAAPI has a backend for this. Currently there's a need to emerge x11-libs/libva-vdpau-driver separately. This 2 line fix would pull it in as a dependency.
Created attachment 352084 [details, diff] x11-libs/libva VIDEO_CARDS=radeon
Possibly it would be better to replace video_cards_nvidia? with vdpau? in PDEPEND.
(In reply to Chí-Thanh Christopher Nguyễn from comment #2) > Possibly it would be better to replace video_cards_nvidia? with vdpau? in > PDEPEND. yep, added the vdpau? () dep; that's something i've been wanting to do but forgot. not sure about video_cards_radeon: I'd like to keep the video_cards_nvidia? () because its the only way to use libva with nvidia drivers. feel free to add video_cards_radeon? () if you think its useful for the same reason.