HOW TO: Purevideo Decoder Registry Patch

[gkar]

Does pure video actually utilize a gforce 6200 or higher card for video rendering more than the cyberlink or winDVD decoder's?.

A 6*** or 7*** series GPU is required for maximum useage of their controls, like smart deinterlacing; where the decoder decides on which deinterlacing operation depending on the source file.

I havn't had a chance to download a demo yet & compare them

There are some out there who have stipulated that the demo product does not operate the same as the purchased one. Especially in use with third party players like Zoomplayer. I have no proof of those claims, though. Also, I'm not sure which model (Platimum, Gold or Bronze) the trial version is based off.

[csy]

Just to clarify, there are two Purevideo devices:

1) The Purevideo MPEG2 decoder. This is totally standalone has has no dependancies on the Nvidia video card. All its features work equally well on ATI video cards.

2) The Purevideo feature set on Nvidia video cards. As mentioned in an earlier post, early ForceWare drivers required the Purevideo decoder to enable some Purevideo featues, but IMO this is no longer the case with the latest ForceWare drivers, and all Purevideo featues are now available with any brand Directshow video decoder.

[gkar]

2) The Purevideo feature set on Nvidia video cards. As mentioned in an earlier post, early ForceWare drivers required the Purevideo decoder to enable some Purevideo featues, but IMO this is no longer the case with the latest ForceWare drivers, and all Purevideo featues are now available with any brand Directshow video decoder.

I was unaware of this. But it may have something to do with the fact I am unable to use any driver version after 84.21 because it will force-stretch all 16:9 aspect ratio DVDs/media files to fill my 4:3 SDTV & projector screen. Not good but a known limitation of some PCs to which is seems Nvidia aren't that concerned about fixing.

[csy]

Yes, Nvidia video cards are well known to have compatability issues with motherboard chipsets (particularily VIA chipset with AGP slot), and also the well known aspect ratio problems.

[jksmurf]

2) The Purevideo feature set on Nvidia video cards. As mentioned in an earlier post, early ForceWare drivers required the Purevideo decoder to enable some Purevideo featues, but IMO this is no longer the case with the latest ForceWare drivers, and all Purevideo featues are now available with any brand Directshow video decoder.

csy, I am a now getting a bit confused, wrt Nvidia driver verxions for use with PureVideo, for Hardware Acceleration.
This earlier thread appeared to recommend (by ShiningDragon) "ForceWare 81.98 WHQL" and "PureVideo 1.02.185". With these new registry settings, are you saying this is no longer the case and I can (should?) revert back to the latest drivers for both? :confused:

k.

[daza67]

gkar,

I'm curious about your force stretch issue and just tried to reproduce it on a 6600 without success. What type of connection and output resolution are you using ? Also what affect does the f7 key have in gbpvr when you use the letterbox mode ?

csy,

I'm supprised to see so much tweaking with the nvidia decoders in order to get them to work properly. I pretty much use defaults, with anamorphic/raw aspect and prefer vmr9 selected and get a great picture on a variety of SD/HD interlaced/progressive material.

There are some nvidia specific hardware annoyances with aspect ratio correction and yuv mixing however these are likely to be overcome if sub gets around to adding a vmr9 exclusive mode option in GBPVR.

IMO, the spdif passthrough in the audio decoders also works without issue. I have also used dts 96kHz 24bit passthorugh with a dvd audio disk on my envy24 based chaintech av710. I have previously used 48Khz/16bit dts spdif passthrough on a Audigy 2ZS using these decoders without issue. So I think your dts issues are likely related to the creative decoders/drivers and not the nvidia audio decoder.

Daza

[csy]

Nvidia video cards are well known to have compatability issues with motherboard chipsets (particularily VIA chipset with AGP slot). ShinningDragon provided his own recommendations for which Forceware drivers work best with certain hardware combinations when using DXVA+VMR, as per below quote.

If you have a Graphicscard like the GeForce 6xxx Series, or lesser, as AGP Version (some of the 7xxx Series too, if they have AGP), then NEVER, EVER USE A FORCEWARE HIGHER THEN 81.98 WHQL !!!! And NEVER EVER use PureVideo HIGHER than 1.02.??.185 !!!!
Why? Higher Versions like ForceWare NEED the latest PureVideo and Vice versa. But these Versions DON'T RUN RIGHT with Graphiccards like the one i posted above. VMR9 isn't correctly available, when using DxVA.

If you have a PCI-E Card like the GeForce 7xxx Series, then you can use latest ForceWare Drivers... but THEN you have to use the latest PureVideo Version TOO!

With my A8N-VM CSM i went back down to 81.98 WHQL and PureVideo 1.02.??.185 and NOW i have a CPU Usage again of ~10 Percent, even using deinterlacing with PureVideo. With newer drivers VMR9 and Hardware Acceleration didn't work right.

As ShiningDragon correctly pointed out, if you choose to use these earlier Forceware drivers then you need the matching Purevideo decoder to enable all the features of the Purevideo feature set on the video card.

The registry patch in this thread is a shortcut method of enabling DXVA and VMR on the Purevideo decoder (any version) without having to manually do it. The registry patch is specific to the Purevideo decoder only, and and has nothing to do with Forceware drivers. The patch will work equally well with the combination recommended by ShiningDragon (noting there are some video enhancements, like improved de-interlacing algorithm, on later version drivers).

[csy]

csy,

I'm supprised to see so much tweaking with the nvidia decoders in order to get them to work properly. I pretty much use defaults, with anamorphic/raw aspect and prefer vmr9 selected and get a great picture on a variety of SD/HD interlaced/progressive material.

There are some nvidia specific hardware annoyances with aspect ratio correction and yuv mixing however these are likely to be overcome if sub gets around to adding a vmr9 exclusive mode option in GBPVR.

IMO, the spdif passthrough in the audio decoders also works without issue. I have also used dts 96kHz 24bit passthorugh with a dvd audio disk on my envy24 based chaintech av710. I have previously used 48Khz/16bit dts spdif passthrough on a Audigy 2ZS using these decoders without issue. So I think your dts issues are likely related to the creative decoders/drivers and not the nvidia audio decoder.

Daza

Actually there isn't much tweaking occuring (only DXVA+VMR and VMR-Default de-interlacing), but I've included all the other dwords for completeness and overwrite old values in case someone has been experimenting.

Thanks for your feedback on SPDIF, it appears my SPDIF issues are specific to me, so I'll amend my starting post.

[jksmurf]

The registry patch is specific to the Purevideo decoder only, and and has nothing to do with Forceware drivers.

Thank you once again csy, you have been very patient with all this.

The patch will work equally well with the combination recommended by ShiningDragon (noting there are some video enhancements, like improved de-interlacing algorithm, on later version drivers).

So can I take it from this that by the same token the patch "will work equally well with the combination of latest Forceware drivers+purevideo" recommended by yourself (regardless of whether my card is the AGP version of the 6200 or not)?

k.

[gkar]

daza,

I'm curious about your force stretch issue and just tried to reproduce it on a 6600 without success. What type of connection and output resolution are you using ?

Not sure if it just related to the LE variant of the card, though I believe not as others have encountered this issue as posted on various threads on Nvidias drivers' official website http://forums.nvidia.com/index.php?showforum=33

If you don't have the issue, I envy you as the later drivers would allow me to set FSV to my secondary -X1 projector- display. With the present version I get continual vertical roll-over with mpg playback (even if it has been transcoded to DivX/XVid).

My res is 800x600x60hz with TV output to SDTV via composite cable off the MSI proprietary S-video>component/composite dongle.

Also what affect does the f7 key have in gbpvr when you use the letterbox mode ?

Not sure about GB-PVR as all my tests were done with Zoomplayer & WMP9. Aspect ratio changes within the players did not show on the SDTV; it remained in full 4:3 mode with the 16:9 image stretched accordingly.:mad:
I did not have GB-PVR configured & working correctly at the time. I'm not really prepared to go to all the hassle of retrying drivers just in case now I've got my system working the best it's been.