Probably not quite the same thing but I once have a segment that I had actually rotated a piece go footage slightly within it in order to straighten it out (enlarged slightly and rotated). When encoded it seemed to create some pulsing pixelation…for lack of better terms. Turns out that the rotated video section is what was causing it. I had to go back to the original edit, take that piece, put it in a separate timeline and do the resize/rotation then export it, and then take that back in and replace the original clip.
It had something to do with the fields getting messed up because of the rotation. Once I did all of that, the encode and resulting DVD was fine. While that might it be exactly what is happening here, it might be something with your footage in that section. In my case even the surrounding clips in that segment were having problems.
FWIW 🙂
Tony Brittan
Island Shore Productions
Posted From iPad