Interlace issues

[srothwell]

I'm posting this here becuase the best and brightest frequent the beta....

I have a 3-tube rear projector HDTV, circa 3 years ago.

There is some strange de-interlacing issue from my main media server, which is connected directly to this TV and HDTV from 1080i channels only.

When I record and watch a 1080i (CBS/NBC) show and playback, it looks like all Sage (or the decoder) is doing is simply dropping one field. The little round CBS eyeball in the corner is slightly stairstepped and, while the show looks darn good, it's clear I'm not getting full resolution.

I also see another annoying artifact: I'm clearly seeing interlace lines on very fast moving pictures. Sometimes on a plain old scene cut, I'll get this striped half one picture/half another picture.

When I watch these files on another PC, they look outstanding, no stairstepping on the logo and clearly full-rez.

The server PC connects to the TV's DVI connector. I am using the very latest ATI catalyst driver, which is set to 1776x1000 interlaced (the TV cannot do progressive).

I have tried all the different bob/weave, etc and nothing changes at all.

Long ago, I changed the registry to:

HKLM\Software\Intervideo\Custom\Hauppauge\VideoDec
\Dxva = 1
HKLM\Software\Intervideo\Custom\Hauppauge\VideoDec
\Hwmc = 1

This was suggested in the forum to stop a reverse field look on SDTV stuff. That works great. I have tried to set these back to 0 to no avail.

If anyone can give me some suggestions, I would very much appreciate it.

Thanks!

Stacy

[stanger89]

What decoder?

[srothwell]

Originally Posted by stanger89

What decoder?

This happens on both the Intervideo (Win DVD7) and Nvidia Decoders.

Stacy

[stanger89]

Well those registry settings will have no effect on either of those decoders, nor will the SageTV settings (though I'm not 100% sure on the later).

Which ATI card and how do you have and how are the decoders configured?

Edit you say when you watch them on the PC they look fine, is that a different PC? What are the differences between that, and on the TV?

[srothwell]

Originally Posted by stanger89

Well those registry settings will have no effect on either of those decoders, nor will the SageTV settings (though I'm not 100% sure on the later).

Which ATI card and how do you have and how are the decoders configured?

Edit you say when you watch them on the PC they look fine, is that a different PC? What are the differences between that, and on the TV?

Stanger,

The registry settings were adjusted for Win DVD 7's intervideo.

I have a Sapphire Radeon 9600SE. I'm not sure what you're asking about how the decoders are configured. The Intervideo I've never touched at all. I have played with the nvidia drivers but honestly I don't remember what.

Sorry, I will watch on a completely different PC and it looks fine. I guess what I was trying to say was that it doesn't seem to be recorded bad, only played back that way.

Thanks

Stacy

[stanger89]

Originally Posted by srothwell

Stanger,

The registry settings were adjusted for Win DVD 7's intervideo.

Impressive, finding where WinDVD puts things for other programs is no small feat

I have a Sapphire Radeon 9600SE. I'm not sure what you're asking about how the decoders are configured. The Intervideo I've never touched at all. I have played with the nvidia drivers but honestly I don't remember what.

The 9600 (especially the SE) isn't the most powerful GPU, so it's probably not helping things. Try checking into the decoder settings, and also in the Catalyst settings (ATI's put their "AVIVO" stuff there). Make sure you don't have Bob selected anywhere.

Sorry, I will watch on a completely different PC and it looks fine. I guess what I was trying to say was that it doesn't seem to be recorded bad, only played back that way.

What's the hardware/decoder config in that look like?

[srothwell]

I have never touched the decoder settings in the other PC.

I'm not entirely convined that these artifacts are not as a result of the display (TV set).

I tried to put a nvidia 6600 AGP card in and it performed worse than the 9600SE.

I'll take a look around and see about Bob.

What settings do you reccomened that I use?

[stanger89]

I'm not really sure, I'm not very familiar with ATI or any of those decoders. Not Bob or Weave though.

[srothwell]

Originally Posted by stanger89

I'm not really sure, I'm not very familiar with ATI or any of those decoders. Not Bob or Weave though.

It has Automatic, Bob, Motion Adaptive, Adaptive and No Deinterlace.

If I set to anything other than Bob, I get strange artifacts.

I wonder if I'm chasing my tail here with respect to the display adapter and the decoder.

I have nvidia ProCoder set to Automatic (someone told me SMART was evil) and to BEST MODE for deinterlacing.

I can't help but wonder if part or most of my problem is due to the fact I am redisplaying on an interlaced device. So it's being de-interlaced, then reinterlaced for the display device (TV).

[stanger89]

I believe "Adaptive" is supposed to be the optimal setting for AVIVO.

You need good deinterlacing because you're scaling, slightly (from 1920x1080 to 1776x1000) before output.

Smart's not evil, but won't work, or won't do anything on an ATI card.

[srothwell]

Originally Posted by stanger89

I believe "Adaptive" is supposed to be the optimal setting for AVIVO.

You need good deinterlacing because you're scaling, slightly (from 1920x1080 to 1776x1000) before output.

Smart's not evil, but won't work, or won't do anything on an ATI card.

So what should I set the nvidia procoder to? Also, what do I set Sage to? It does seem like it could be pretty easy to chase your tail!

So past this, maybe I should just go 1920x1080i. Only issue I had before with that is I can't see the windows start bar. Any trick to shrinking that in on the sides? I know how to move it up, well make it bigger.

Thanks

Stacy

[stanger89]

Originally Posted by srothwell

So what should I set the nvidia procoder to?

Best guess? Automatic and Best Available. It would be "decoder" BTW

Also, what do I set Sage to?

Default for all the deinterlacing/DXVA stuff (not for decoder or renderer).

So past this, maybe I should just go 1920x1080i. Only issue I had before with that is I can't see the windows start bar. Any trick to shrinking that in on the sides?

Not without reconverging/focusing the TV.