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View Full Version : NVIDIA DVD Decoder and DXVA


Rash
18th June 2005, 20:26
Hey guys. I have one question about this DVXA thing. I installed NVIDIA DVD Decoder on my system and simply couldn't make it work. I hear sound but no images at all (and the NV DVD logo is OK in the systray). So I gave up.

Now I am using WinDVD 7 and noticed it shows basically the same string on the Video information window (Information tab on Setup).

NVDIA DVD Decoder: DirectX VA Mode B (mc16)
WinDVD 7: MEDIASUBTYPE_DXVA_ModeMPEG2_B

More WinDVD information:
Video:
Hardware:
Vendor: Nvidia
Connection type: MEDIASUBTYPE_DXVA_ModeMPEG2_B
DXVA acceleration type: IDCT
Downstream renderer: CLSID_OverlayMixer
So, my question is. Is WinDVD 7 taking advantage of my video card? I know it is using DXVA, but that acceleration type means it is iDCT only and not really decoding, right? That's what's in the NVIDIA's page:
"MPEG-2 acceleration for inverse quantization (IQ), inverse discrete cosine transform (IDCT), and motion compensation (mo comp)".

I mean, it's not like if the playback is not smooth. It is. And sorry for this kinda newbie question. ;)