Comment 47 for bug 1424201

(In reply to Jean-Yves Avenard [:jya] from comment #32)
> Gstreamer's vaapi plugin was one of the biggest crasher!
>
> Additionally, performance improvement were almost nil as for videos where it
> matters, the time required to copy from the GPU surface took all the
> benefits away.

I don't think the copying bottleneck was specific to gstreamer, it's a problem that needs solving whether they use VAAPI or VDPAU directly or via any other library, which is probably why they're not using the VAAPI and VDPAU support in ffmpeg either.