A clarification. It's not only the screenshot, even the whole film is interlaced. I've send a testfile to Ralf Haenlein.

That I can understand, but why does the software change the picture when I can see the picture correct in my box?

Can I deinterlace the file I've got in the preview window in DVR-studio pro 1.41. I'v got lines in the picture. I can see it clearly when something moves quickly in the movie. You can also see it in the DVD.