Intriguing: "Video Post-processor:
Unspecified VFW codec" (VFW="Video For Windows").
What version of DivX codec do you have installed? You could need to update it.
In second part of item 4 of
this post there is a direct link.
(Also read further comments re its installation in that post)
If that doesn't work, try a different video rendering (overlay) mode
(see
this post)