Nero Recode border problems



I am encoding a movie from 720x480 into 480x320 in Nero Recode but I keep getting vertical borders. I made 1 minute clips many times to try to remove the borders in the crop settings but I can’t seem to get it to work.


I tested a clip with ‘Square Pixels / Letterboxing’ unchecked but then it doesn’t let me use my own resolution. For example when I type in 480 for width it corrects me with 352 instead of 320.