Bakadeshi [AuN Studios] wrote:ISOmeone said something about B-frames being evil too... I tried with then enabled and disabled and get pretty much same result, (quality wise) So I don't know on that. someone want to clarify?
Apparently there's a bug in XviD 1.0 that causes dirt-like artifacting in some scenes when B-frames ("B-VOPs" is just so much more fun to say, though) are used. I encountered this problem when trying to make a good encode of the video I'm currently working on.
I got around it by adding new Zones for the scenes that were affected (there were only two of them as far as I could see) with the B-frame sensitivity turned down to -50. I don't think this got rid of <i>all</i> the B-frames (if I can trust the "Show me the internals!" box), but the artifacting problem was solved.