Selon Doom9 ce serait bien un container AVI. Un container DivX 6, voire même MPEG4, ne serait pas rétro-compatible.
Et selon
http://www.heise.de/english/newsticker/news/54886 : "DivXNetworks had to integrate these additional features in the AVI container in a manner that makes them virtually invisible to current DivX decoders".
Wait and see...