FFmpeg: Pre5 vs. Pre6

[Prodater64]

Could somebody tell me what happend with these 2 samples. It was encoded with pre5 and pre6 version of mencoder, same configuration, but pre6 is very, very bad.
Source is a HQ rmvb Spiderman 2 trailer.

Pre5

Pre6

[fabrice]

Hi,

It look like looking at the sample throught a bootle (or I forget to clean mi glasses!). I think the only solution is getting rid of all mencoder options, one by one, and see which is the faulty one... (sorry!) except if someone has already had this problem...

Salu2
Fabrice