I will take a shot at this one.
Screen resolution was something I really struggled with UNTIL I FOUND DVDFab.
At 29.97 or 23.976 frame/s (usually used in regions where NTSC is standard):
720 Ã— 480 pixels MPEG-2 (Called full D1)
704 Ã— 480 pixels MPEG-2
352 Ã— 480 pixels MPEG-2 (Called Half-D1, same as the China Video Disc standard)
352 Ã— 240 pixels MPEG-2.
Unfortunately movie studios do not produce (for the most part) movies for DVD. There for even though the DVD has a 720*480 image burned to it, some of that resolution is blank space of black bars.
DVDFab AUTOMATICALLY crops out the black bars, saving time and space.
Changing the resolution will distort your picture or add bars all the way around.
Increasing the resolution and keeping the aspect ratio the same would be upscaling the DVD and not what DVDFab was intended to do.
Leave the screen resolution alone and let DVDFab choose for you.
For better quality up your bit rate to 3096 and do 2 pass (126.96.36.199).
Bottom line leave the screen resolution alone and let DVDFab do the work.