Haven't got vaapi working with vlc myself. The problem seems to be with the ffmpeg plugin. I have discovered several workarounds to eliminate video tearing in vlc (if that is your issue) depending upon the desktop manager that I use. I use compiz for XFCE and KDE, and add an environment variable for Gnome.https://bbs.archlinux.org/viewtopic.php … 9#p1018579
Maybe you will find something useful here: http://www.x.org/wiki/RadeonFeature/#VSYNCOr here: http://phoronix.com/forums/showthread.p … s-ShowdownI am not currently using ATI hardware to tell you exactly what's needed. Using a compositor such as Compiz might make the difference.