> On Wed, 29 Feb 2012 19:20:21 GMT, Winniethepooh@100acrewoods.net
> (GMAN) wrote:
>> What DVD player software are you trying to use? There has to be some type of
>> MPEG2 decoder software installed. Try looking for a demo version of PowerDVD
>> or similar and see if that works/
> VLC, BlazeDVD, and Media Player Classic. All work on another
> machine. They play on this machine too except only audio, no video.
> I have never had this problem before. I will try to download a MPEG 2
> decoder to see if that helps.
What are you using for a video card ?
Maybe the hardware doesn't support Overlay Plane ?
If you've installed DirectX 9 package, then perhaps that
would add VMR7 and VMR9 ? Then, go to the preferences of
your DVD player, and see if Overlay Plane, VMR7, and VMR9
are options, trying them one at a time.
Sometimes the player (CODEC) will use IDCT on the video card,
for acceleration, but support for that goes back a long
way on video cards. Perhaps if the video is pre-1999 or so,
it might not be there. I can't find an article to tell you
when it was introduced. It helps decode the "blocks" in
MPEG2 (frequency domain). While software could detect this
hardware logic block is missing in a GPU and run emulation software,
you'd probably see video at one frame per second and a lot
of skips. http://upload.wikimedia.org/wikipedi...-Dct-table.png
The software API for that now, is DXVA, and IDCT is rolled
in there somehow. But a DXVA call now, probably goes to the
dedicated video playback block in the GPU (which in some cases
on modern cards, is a complete decoder, not just the tiny IDCT
part of the problem). http://en.wikipedia.org/wiki/DXVA