I have found a problem with the DXVA selection.
Casimir if i am not mistaken you have added the Pixel Aspect ratio check? It will have to be removed as i have not yet encountered any files with wierd PAR that did not work with DXVA
Please see this example:
http://www.avsforum.com/avs-vb/showp...&postcount=171
EDIT:
It does seemt that the par aspect ratio might not be a problem after all, Please comment out the check until further and more detailed proof is presented