Visiontek GeForce 4 Ti-4600 TV-In Video Overlay Bug

Visiontek GeForce 4 Ti-4600 TV-In Video Overlay Bug


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Posted by Bruce on May 03, 2002 at 03:01:33:

The Visiontek GeForce 4 Ti-4600 is a good card, don’t get me wrong, but when they decided to include S-video TV-In/Out capability, something went wrong. Getting to the point here, the video overlay display when viewing a Video-in signal has a white line on the top of the viewable portion of the picture that is 1-2 pixels in width. The picture also does not squarely fit in the video overlay frame (it differs depending on what resolution and format you use, but uneven nonetheless). This problem is equally annoying in full screen mode.

Of course, when recording the input, you record the white line too, and in order to make a decent MPEG presentation, you need to crop the picture accordingly (which takes plenty of time, and results in a second generation image).

Believe it or not, the reason I got the card in the first place was because of the video capture capability built into (arguably) the fastest graphics card on the planet. I sold off my other video capture board the same day I bought the Visiontek (this frees up one more PCI slot), but I wasn’t expecting this problem, and I certainly don’t want to ‘workaround’ it by buying another capture card.

My question to all of the experts out there is: Are there tools to adjust the video overlay (other than brightness/contrast/gain) to fix the white line and ‘centering’ problem?

Visiontek has admitted to me that this problem exists, but they have not proposed any solutions.

On a similar note, my video overlay sometimes freezes and/or has split screens (but this doesn’t seem to affect recording somehow). This may just be a display/WDM driver problem or other software compatibility issue of which I’m more confident of a cure.

General question: Has anyone heard of using a 1394 Firewire to connect a digital TV cable box to there system? Can a Firewire port capture a TV-in signal like a DV camcorder playback?

Other system info: Athlon XP 1900+, EpoX KT266A motherboard, 512MB RAM, SB Audigy MP3 soundboard, Cyberlink PowerVCR II.

Please respond here and e-mail me. I have screenshots (see link) if anyone is interested. Let me know if you are experiencing these problems too. Visiontek says I’m the only person on the planet that has mentioned this problem. I don’t think they’re going to advertise this, so we need to all speak up.



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