Well, I got an Avi File using xvid and ac3 and the picture is mostly green with big blocks and scenes mixed. I found out that this seems to be a common problem thats mostly caused by different versions of xvid that are not compatible. Well I have tried out many codec packs or just the direct downloads without any help. The best result so far was delivered by ffdshow, the colours are normal and at first I thought it worked but suddenly the picture scenes started to mix again. Is there anything else I can do besides trying out different xvid mirrors or can someone post a bigger list of mirrors? (rather no packs because of the size). And could it help to download older versions of codecs (of ffdshow for example) or are the new ones 100% compatible to the older ones?