Thats what I dont understand. The iphone supports resolutions greater than its actual physical resolution, so it does its own scaling I assume. I dont understand what resolutions dvdfab offers as options, and why. Are they related to the source? Which one makes sense for a 1.3, 1.77, 2.35 ratio source and what effect does each have on the image you see on the phone? I understand that there are many choices here, but Im just looking for some rule of thumb like “choose the one with the largest vertical resolution that does not exceed 480” or something similar as a guide. Any suggestions?