https://bugs.freedesktop.org/show_bug.cgi?id=43858
--- Comment #23 from Alex Deucher agd5f@yahoo.com 2012-01-18 11:41:46 PST --- (In reply to comment #21)
Which applications use Xv?
movie players mostly (totem, mplayer, vlc, etc.)
and more importantly: What is Xv?
It's an X extension for accelerated colorspace conversion and scaling generally used for video display. Xv is short for Xvideo.