why defy 525+ play the 720P RMVB not smooth in CM10?

[nimicat]

as the title, my defy+ flashed Quarx's latest CM10,and today I played a 720p movie, and it is not smooth as the CM10.
is the defy+' hardware not support? or any other problems?
I want to know how can i do that i can see the smooth movie?
thanks friends!~
:highfive:

 

[euros60]

http://forum.xda-developers.com/showthread.php?t=1768702

CM10 for Defy+ with 720p record on 24 September nightly