To all who can answer me,
I just downloaded the famous test.avi video, it played very choppy on the stock media player, although it ran perfectly fine in kmplayer set to play via osso-media-server, would ove to know why.
I am using KP49 + 630MHz DSP clock.

P.S. I found out that the stock media player plays it just perfectly if I locked my N900 CPU @1150...hmmm...