Great post! I just got my aOpen MiniPC to finally display 800x480 on my Xenarc.
However, when I began playing DVD's or any other MPEG2 files I noticed that DirectX Video Acceleration doesn't seem to be available. Has anyone else noticed this or found a way to enable it? So far I've only tried the PureVideo decoder - I'm going to try DScalar and others after work (though maybe I'll put them on my USB drive and spend lunch in my car
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Thankfully MPEG4 and WM9HD seem to run quite well full screen with smooting and scaling applied correctly so I'm converting any music videos I have to Divx.
I had to install another copy of windows so at boot-up I can choose between the Embedded 800x480 or regular drivers and higher resolutions/DVD. Perhaps I can figure out how to get the driver INF configured so that it's possible to actually change resolutions without modifying the registry/rebooting.
Since I mostly use the PC for music, gps, and sometimes to play music videos I prefer to run at the native 800x480.