Strange color behaviour while capturing from VHS

[JJF007]

I use my ATI X800 Pro VIVO to capture Videos from my S-VHS Recorder. As capture Program i use VirtualDub.

At some scenes (special when i have a white background or a black background with a face) it seems that the contrast gets up, which means that you see just only a white screen. If i show the same scene on a TV it looks perfect, so it can't be the Recorder. It seems that anything is adjusting something.


Thanks for your help!

[borgunit]

You may want to do a search on Macrovision and see if this is your issue.

[JJF007]

Hi!

Thanks for your answer.

I thought its Macrovision too, but after a Macrovision Hack it apears too. It can't be Macrovision, because the Tapes are free of it.

[fccHandler]

Some ATI cards (or drivers?) are extremely sensitive, and the slightest instability in the signal can trigger the "Macrovision detection" circuit and ruin your capture. (At least, I believe that's what's happening.)

I'd say about 3/4 of my VHS collection suffers the same symptoms you describe, using my ATI All-In-Wonder 9600 AGP. And I know that none of these tapes actually utilizes Macrovision.

I never was able to defeat its Macrovision detection using any software patch or hardware box. Ultimately I bought a cheap ATI TV Wonder VE card for $30. This has a BT878A chip and no Macrovision detection. I use it now for all of my VHS captures and I'm very happy. :)

[JJF007]

I allready thought on this last night. It is very strange, and looks realy like a Macrovision protection. But that ATI has problems with that is realy strange.

I will get a TV-Card and try it out.


Thanks for your Answer.