Removing qpel and gmc from a xvid coded movie

[r444]

Hi,
I recently bought a Sigma 8550 media processor based stand alone divx/xvid player. This processor does not suport qpel and gmc coding. I has already encoded some movies suporting this features. My question is, using mencoder, how do I re-encode the xvid movies without these features keeping the same quality? And changing the bitrate? The manual and wiki tutorial does not seems very clear to me .
I know that GSpot (a win apps) can give readely info referring gpel and gmc suport in a xvid file, I search for a application for linux but I didnt find any. I try mplayer -v, avinfo, ... but nothing. Does anyone knows an apps for linux that can extract this kind of info.
Thanks,
r444

[mean]

avidemux (2.0.40) will give you that info
Load the file and press info.
The packed vop/GMC/Qpel checkbutton will be checked or not.

You might want to read this too for the packed vop stuff, i use it very often for my mediatek based DVD player

http://fixounet.free.fr/avidemux/doc/en/standalone.xml.html

[mean]

http://fixounet.free.fr/avidemux/win32/gmc.png

Example above

[r444]

Thanks mean,
I find this http://edu.bnhof.de/pipermail/xvid-users/2004-November/000425.html but the solution is not practical.
I will try your hint.
thanks again
r444