SVideo Problem?

[ArcticFox]

Ok ive got 2 inputs hooked up to my TV Card, Composite and SVideo:

http://homepage.ntlworld.com/martin.bryce1/COMPOSITE.jpg

http://homepage.ntlworld.com/martin.bryce1/SVIDEO.jpg

Composite has a little bit of noise and is a bit blurrier so i was thinking of using SVideo, but im getting some sort of interference, and i dont know what it is since its not RF signal,

im using the Svideo lead that come with my graphics card if that helps.

[fellaw]

Are you using this (http://www.megatronics.lk/products/connectors/video/avw082.jpg) kind of adapter for your source(VHS, DVD player, aso.)?

If so, then I have to tell you that such adapters aren't capable of S-Video. As you can see here (http://www7.brinkster.com/atari/pinouts/scart.gif),
Scart doesn't give proper S-Video output, only a composite signal or RGB. So why are there adapters with S-Video? They're fooling with you. They use the composite output of the scart for chrominance(color) and the red channel output for luminance(brightness):
http://www.traffic-eye.de/FLI4L/sat-mediabox/bilder-org/scartToVideo.jpg

This isn't really S-Video. You'll need an S-Video output on your DVD or VCR, this is the only way. An external device thich seperates the Y and C plane from the composite doesn't make much sense, because your capture card will do a better job with this.

Edit:

Just to mention: S-Video-->Composite is done very easily, mostly by shorting the Y with the C plane using a capacitor. But reversing this isn't possible the same way.

[ArcticFox]

heheh its the EXACT same convertor im using, what a shame, composite looks blurry and has some noise,

As it says ive got composite hooked up already, and using RF isnt viable, just wondered if i could get it a bit sharper that was all.

[fellaw]

You'll have to do this during the post processing, e.g. via Avisynth. It's what this whole forum is about. Just do a search and you'll see. Maybe an RGB to S-Video converter also will do the trick. But they're pretty expensive, IIRC about 140 USD.

[avih]

nice one fellaw ;)

[fellaw]

np, thx anyway.

Maybe this is worth an entry in the FAQs.

[n3rdyguy]

Hi just wanted to tell you that I'm doint the exact same thing from my dvb reciever to an Avermedia with a Philips SAA7134 chip - it's working nicely !

[fellaw]

Hm, this is interesting. I also use a card with the Philips chip, Terratec Cinergy 400. It didn't work for me. However, it's supposed not to work with any device, because the method of the converter doesn't give true S-Video. Sounds very strange to me that it did work with your card.

[n3rdyguy]

I just tried some different settings on my reciever. I can choose between:

"CVBS/VIDEO"
"RGB"
"S-Video"

It's set on S-Video, the two other settings gives Black&White with alot of noise.

[fellaw]

Then you're lucky, because you own a receiver with true S-video out.
Could you please post manufacturer and model name? Might be worth a try to search on ebay.

[n3rdyguy]

Sure, It's a Force D-Master 1145 - I believe all their series has this funciton, at least from 1145 and up.

Link: Force homepage (http://www.force.tv/)


Edit: It's under their terrestrial recievers:
Terrestrial Receivers (http://www.force.tv/showpage.asp?ID=232)

[famawizard]

I have an S-VHS JVC vcr deck (one with tbc and digital filters) and if I use the svhs out with my tv I get the same problem that ArcticFox
has, only with much less noise, but of course I don't use any adapter.
This appens with both cassette and antenna sources (btw, my tv is one of the latest panasonic set).

Actually the image is much more detailed in svhs mode, but that kind of noise is disturbing...

Strangely, if I capture the svhs output with my broktree card (pinnacle pctv rave) the video is perfect, far superior than composite and there is no noise.

Now you could think that the svhs input of my tv set has problems, but if I connect my hi-8 cam the video is perfect.

Any ideas?

Thank for your help and excuse my for my bad English.
Lucio

P.S.
My tv set has 3 inputs and my vcr has 2 svhs outputs and I tested all of them.

[Arachnotron]

Are you using this kind of adapter for your source(VHS, DVD player, aso.)?

If so, then I have to tell you that such adapters aren't capable of S-Video.

This is not completely correct. It depends on how the scart of your device is wired. If your device is capable of generating an s-video signal AND puts this signal on the scart, such an adapter will work. But if the scart is only wired for composite and/or RGB, such an adapter won't transform this into s-video.
For instance, my JVC s-VHS deck can output a s-video signal from it's SCART connector.

If your device was only capable of delivering an composite/cvbs signal, capping it with the card set to s-video would result in a greyscale picture. Since you do get color, the problem lies somewhere else.

@fellaw
I also own a Cinergy 400, and it caps s-video very well. :)

[famawizard]

So, my problem is really unusual? :)

BTW
I just tried to connect the svhs output of my videocard (nvidia 5900xt) to the tv and the picture is beautiful.

Now I know that there are problems only with vcr out...but why only in tv input and not in my capture card?

Bah...