Deinterlacing raw (unencoded) video

[Champ]

I posted this inquiry in the WDM software encoding plugin thread a few days ago without response, so I'm trying again here.

Is it possible to force GBPVR to use DxVA/VMR9/Hardware deinterlacing on a standard-def picture WITHOUT tweaking settings in an MPEG2 decoder? I'm not using a codec for standard-def; I'm talking about raw video from the live preview.

A bit of background:

I'm using GBPVR primarily as a high-def PVR, with an OnAir GT capture box used to grab ATSC over-the-air broadcasts in the United States. It works great for that. I'm getting standard-def TV via DirecTV DBS, and I already have a TiVo for that, so what I'm trying to do is set up a channel in GBPVR as a high-quality standard-def passthrough. I'm taking the standard-def video signal from the TiVo, routing it into the S-video input on the OnAir GT box, and setting up a separate capture source using the WDM software encoding plugin (with no encoders installed). So far so good -- I have no need for encoders because I'm not timeshifting or recording the standard-def source.

But I *would* like the picture to be nicely scaled and deinterlaced.

So far it appears I have two unsatisfactory options:

(1) Use a deinterlacing directshow filter capable of handling raw video (and I wasn't thrilled with either Alparysoft or ffdshow for this); or

(2) Forgo deinterlacing entirely. Yuck.

In theory I should be able to get hardware deinterlacing applied via the VMR9 renderer, but I can't figure out how to do that. I am using Windows XP on an Athlon 64 x2 3800+ processor, with integrated GeForce 6150 graphics. That should be enough "grunt" to get the job done, and that graphics processor does (allegedly) support hardware deinterlacing. My HTPC box will eventually be ugraded to non-integrated video, so if that's something I need to do, I'm open to that too.

Thanks!

[sub]

I dont think this is possible, but I've not spent much time fiddling around with the data the come out of this type card so I dont know for sure.

[Champ]

Oh well. Upgrading the video card should at least give me better deinterlacing performance with ffdshow, so that's probably what I'll try. Thanks for the frighteningly-almost-immediate-from-halfway-around-the-globe reply!

Hopefully someone who has tried this can shed some light on the situation.

Cheers from Friday afternoon.

[pBS]

i'm pretty sure the code in the WDM recorder would have to be tweaked..i use a pctv and i get the same problem for live tv..timeshift looks great cuz of the nvidia mpeg2 decoder feeding dxva the necessary info...something has to do that or signal it needs doing at least for it to know to..
i'm guessing the type of stream sent out or a flag in the stream...
i used ffdshow rather happily but with encoding it slows down too much..

tho for your uses it should be the best option...many deinterlacers to choose from, or try the Dscaler plugins for it, tho i haven't tried those myself..
no need to even tell gbpvr its there, just set the raw decode options to "all supported" and make sure the hardware deinterlacing is enabled in ffdshow and you have the newest version..i think it's on misc tab at bottom..or no, output is it...i don't have hardware deinterlcing card in this machine so i can't tell if that drops cpu any...let us know..