:: 
 :: > I'm not quite sure what YUV2 is but ordinary MPEG2 YUV (more properly,
 :: > Y, Cb, Cr) is such that U and V are subsampled x2 horizontally w.r.t. Y and
 :: > that is how you get "16 bits".
 :: 
 :: I'am far from xpert at this area - so maybe i'am wrong at this ml anyway 
 :: mayself ;-)

I'm an image/signal processing researcher.  As I've demonstrated several
times on this list, I know next to nothing about X,  itself, except as
a simple user who wants to learn.  You're probably on the right list.
But the real xperts would be a better judge of that.

 :: > Bit chopping does not, technically speaking, result in loss of resolution.
 :: > Instead you get various "contouring" and other artifacts due to the
 :: 
 :: Exactly that is what i see!
 :: 
 :: But what to do now? Is there a way to support more ximage input formats?

This is a question for the Xperts.  I can't help you.  I can only explain
why you see what you see :-)

 :: But, this is going OT now - as it was about Xvideo docs. Still got no 
 :: detailed explanation why i should use the XvPutVideo() function call at all, 
 :: which i thought would solve btw, the problem of the high CPU-load (at least 
 :: reported to me with V3K + NVIDIA + Matrox cards).

Comments from the Xperts?

Dean
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