I get a consistent pattern of interference on Windows 7 64 bit on composite video input on a variety of capture cards, graphics cards and even motherboard combinations.

The cards are the Compro VideoMate C100 and the SAA7130 Analog TV Card. I've tried various Nvidia GT220 and GT440 cards.

Is it possible to fix this ?

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  • 1
    Silly question - have you tried different cables? A different input source? – Shinrai May 31 '11 at 14:40
  • Good question, I've got a higher quality phono here so I'll try it and another camera – Chris Porter Jun 1 '11 at 14:44
  • Same problem with different camera and cable. – Chris Porter Jun 1 '11 at 15:00
  • Unless it's an incompatibility with either A: your software or B: the driver those video cards are using (or C: those two things don't play nicely together), I have no clue. You've ruled out a hardware problem anywhere along the line. – Shinrai Jun 1 '11 at 15:31
  • I suspect the capture cards use the same chip which is getting interference from the graphics card but I dont know/ – Chris Porter Jun 1 '11 at 15:50

I had the same problem with my Compro VideoMate C100, with several large flashing green lines continuously streaked across the screen. It was nothing to do with the input cables, as the interference was showing even with no cables plugged in.

I think it was caused by a driver update. I rolled back the driver to version - also available here: http://www.comprousa.com/en/download/video_capture.html?d=1&p=c100

I still get the occasional faint grey line, but not enough to worry about.

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