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**Karlson** · 25 April 2002, 13:27

Lambchop,

people here try to do their best to help others. By
coming again with an issue and saying: oh I know
somebody already helped me but I do not remember,
so please do me that favor again, you will not
succeed.

Get grilled.

**Fred H** · 25 April 2002, 14:21

Lambchop
If you've forgot the answer search the forum...

I did it, but did not found your question before.
I'm afraid, you've "forgot that you've forgot" to ask it before.
If you are lucky, maybe you have a "new" chance

Fred H

**Lambchop** · 29 April 2002, 09:46

Woa! Sorry, I didn't mean to offend!

There are 2 reasons I said I might be bringing up the subject again:
(1) I know I posted it on the official matrox forums and vcdhelp.com, but wasn't sure if I had indeed posted it here. I remember posting here before, but to my knowledge it was regarding macrovision, and not this issue, but could not be sure. Not realising there was a search I didn't check, but now I see I havn't posted this topic here before!

(2) I went through a number of possible solutions which were offered to me but did not work unfortunately, and I cannot remember them all, but recently overcame another problem, and thought it might bring me a step closer to solving this one, so wanted to go through the same steps again to see if I could get anywhere.
Ok, fair enough, bad wording on my part!

Like I said, sorry if I offended! Can anyone offer any information on the issue?

**Sciascia** · 29 April 2002, 11:50

Forget it, you blew your chances.

Anyway, with just 5 posts including the ones from this post I doubt that you had posted it here before.

What version of the VT are you using? I believe that there was a set with the fields mixed up.

Also try enabliing used field based scaling in the Dualhead properties of DVDMax. It may just be an issue of the progressive PC monitor not liking the interlaced video. See if you have the same problem on the TV output.

Capturing to HUFF does not require a very fast CPU. It requires a pretty fast HD though, because it isn't compressed very much at all it has a high bandwidth. Try capturing to your fastest drive (probably your biggest) and see if you stop dropping frames then.

**Lambchop** · 29 April 2002, 12:41

I reinstalled v1.54 recently to see if it would fix my problem actually, with no success. I think the problem has cleared up through installation of some updated ALI chipset drivers, but I havn't checked thoroughly, so if it isn't working I'll try that trick thanks!

As for HUFF, I was under the impression that it causes problems with the G400TV because it doesn't capture to YUV, but only to RGB, so had to do a LOT of conversions to get the required result, and cannot cope at full screen. I'm no expert, I could very well being wrong, I was just wondering what your thoughts on this matter were?

thanks again

**Karlson** · 29 April 2002, 13:32

Lambchop,

you will be forgiven

Maybe a silly question, but you are aware that if you capture half screen resolution, there will be no need to interlace, whereas when you do full screen, there has to be interlacing, so that the artefacts would be "intentional".

Depending on what you are going to do with the material, you either try to de-interlace them, possibly with the smart de-interlacer for VirtualDub, or you leave it, e.g. when processing for SVCD.

About HuffYUV: my experience is that you will never suceed in capturing with it when you are not using a RAID0 array. What also works quite well, by the way is using a software codec like Morgan or PICVideo. For me, AVI_IO creates the best capturing results.

**areia** · 2 May 2002, 00:24

Lambchop, the interlace problem is already answered, about the dropped frames, there's a known bug with that version of video tools you are using, I still remember that and most people around here too: at the time it has been out almost everyone reported lots of dropped frames and most of the people moved back to version 1.52. Since I don't run win98 for a long time I can't say what's the best video tools but I remember that version 1,52 used to run fine. You can just uninstall your vts and try 1,52, can't be sure but that should solve your problem. Good luke.

**Dr Mordrid** · 2 May 2002, 05:45

Each NTSC, PAL or SECAM video frame consists of two fields; one field has the odd scanlines while the other has the evens. Interlacing "artifacts" are normal and are due to whatever movement that occurs between the time each field is captured.

To minimize the striations in camcorder footage you should use the fastest exposure time your cam has consistant with the lighting. In bright sun this is no problem, but in dim light it can be problematic. Even after doing this there will still be a double image, but the striations will be minimized. Delacing will get rid of one of the double-images, but at the cost of detail.

With broadcast, VHS or disk sources there is nothing you can do to eliminate/minimize them but to delace the footage.

Another option is to process the footage thorugh either VirtualDUB or TMPGEnc. Both can use advanced delacing filters that can combine both fields into very good looking NON-INTERLACED footage.

VirtualDUB's advanced delacer is in the form of a plugin whose link is on VirtualDUB's site. TMPGEnc's delacer has numerous optuions, but the "odd-even" collection is the most useful interlace artifact removal.

Yes, TMPGEnc can take an *.avi as an input, apply its video filters and save the video back out as an *.avi. The only limitation is that it cannot save out DV type 1 or DV type 2 unless the MainConcept DV codec is installed.

This technique is very handy for when the footage will be used later with overlays, titles or other effects where the interlace artifacts would be objectionable.

Dr. Mordrid

Announcement

Interlacing problems when capturing greater than half screen size using G400TV

Interlacing problems when capturing greater than half screen size using G400TV

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