Originally Posted by piotrq__
Make sure you've checkmarked "use verbose debugging" in gnome-mplayer prefs (if it's your player) and then copy the playback-related messages from ~/.xsession-errors file.
I looked in gmplayer pref and I didn't see that...
So I added "msglevel=9" in "~/.mplayer/config" but all I get in .xsession-errors appears to be a few "!!! [Hook] hook(): title not found" when I use the vdpau codecs.
Enabling the Composite extension fixed the vdpau output but the codecs still won't work...