Problem with black lines (they're moving!)

It’s just that.

The black lines at the top and bottom of the screen are there, sure. I can handle their presence as I know there’s sometimes no choice about them.

But with ConvertX to DVD, their edges are ‘shimmering’. The lines where the picture begins and the black starts are moving up and down quickly, and it’s really annoying.

Does anyone know what I mean/had this same problem? What can I do about this? What are the best settings to use if I want a good picture with a full screen? How can I get the lines to be stable, if they indeed need to be there?



Show us program log, that gives more info to solve the problem.