Flickering Problem using HD PVR

[Xela-D]

Mmh, what other device shall I try? I only have the HD PVR for my Gameplays, and I dont know what else I could buy... There's only the new Hauppauge HD PVR2, which I doubt will work either if the first Edition doesn't already. And, honestly, I can't just buy a TV Card to "try" if it works (I wouldnt be able to get it in the PC by myself too...)
The HD PVR 2 (or Elegato Game Capture) is even kinda expensive and USB bounded too.

[jagabo]

Try recording from a cable or satellite box. Or some other box with HD component outputs.

General information about ground loops:
http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29

In video, ground loops can be seen as hum bars (bands of slightly different brightness) scrolling vertically up the screen.

http://www.mccdaq.com/PDFs/specs/Noise-Reduction.pdf
http://www.jensen-transformers.com/an/generic%20seminar.pdf

Try plugging all devices into the same power strip. If you have cable TV coax connected to any of the devices disconnect it (this is a very common source of noise). Unplug any other devices on the same circuit.

[ricciofix]

Try recording from a cable or satellite box. Or some other box with HD component outputs.

General information about ground loops:
http://en.wikipedia.org/wiki/Ground_loop_%28electricity%29

In video, ground loops can be seen as hum bars (bands of slightly different brightness) scrolling vertically up the screen.

http://www.mccdaq.com/PDFs/specs/Noise-Reduction.pdf
http://www.jensen-transformers.com/an/generic%20seminar.pdf

Try plugging all devices into the same power strip. If you have cable TV coax connected to any of the devices disconnect it (this is a very common source of noise). Unplug any other devices on the same circuit.

Fortunately this is not an old thread, I have the same flickering problem, I've notice it recently cause i bought the component cable probably the problem was already there in SD but I wasn't able to see it.
Anyway here's an example of my flickering, I don't have a noise problem:
http://www.youtube.com/watch?v=c8dadWdZWvw&feature=youtu.be

I think jagabo get it: the problem appear only when I plug in the usb chord, when I unplug it the flickering/noise disappears, so the problem is just due to that connection and the software is not involved.
Now, I've tried to see if the problem was in the power and I tried to close my mac with the usb connected and the flickering was still there, then I tried to quit the power to my laptop (that unfortunately needs it cos I dont have a battery) and the flickering disappeared. So I tried to plug all devices in the same power strip but it haven't solved the problem.

I think as jagado said that is a power problem, but the main problem now is how to fix that.

[ricciofix]

this
http://answers.yahoo.com/question/index?qid=20110222165217AAl1BBQ

could be the solution, I'm talking about solving ground loop which is supposed to cause the problem

[jagabo]

Also find a battery and try running off that, without the wall wart.