I'll upload my AVS patched version over the weekend for you to try. Along with avc2avi so you can play it with the player of your choice :) -Nic ps I'm also trying to optimise the reference source code, the motion code will be hard to do (for me ;) ) But other bits like the Hadamard transform are easy... pps Wow, it's amazing how quick the reference encoder is with a few of the parameters turned off...(but then the quality drops of course)