[popcornmix]

but i tried to play a Xvid video and the quality was very bad all blocks in the video etc Which normally looks like its wrongly encoded but with 621 they played just fine.

I've had a test. xvid is generally fine, but I suspect your video has GMC which can't be hardware decoded. Look for something like this in mediainfo:

Code:

Format settings, GMC                     : 3 warppoints

We should we automatically switching to software decode for GMC, but I suspect an fffmpeg change has stopped that working. I'll look into it.