When i acapture from my analog source(videorecorder or analog camera) with wintv pvr250 on dvd format standard play there is a annoying noise (a sort of zoom noise) along with playing the dvd on my dvd player.

What can it be?

Also when i capture a analog video with dvd sp format there can be 1,5 hours of video on a dvd, i thought this could be 2 hours video?

Must i alter the bitrate? Can this be done without losing quality. What kind of bitrate do you use for videotapes to dvd and analog videocamera to dvd?