[mythtv] High CPU usage with CVS version

[steve at nexusuk.org]

I'm having a problem with the latest CVS version.  I'm using a bttv card 
encoding to mpeg4 with mp3 audio.  If I try to watch a video that is 
currently being recorded then the frontend uses an abnormally high amount 
of CPU (over 50% - it usually uses 10 - 20%).  Watching Live TV works 
fine, and watching the video once it has been recorded seems to work ok.

Has anyone got any ideas what might cause this?  I'm just upgraded my bttv 
drivers too, but that shouldn't affect the frontend.

-- 

 - Steve                                             http://www.nexusuk.org/

     Servatis a periculum, servatis a maleficum - Whisper, Evanescence