FitCD is a tool to help you calculating the exact image size of a SVCD (authored with vcdimager, Nero or I-Author) or a DVDR.
It includes a resizing calculator for optimal (macro)block-usage in MPEGs. You can also export a sample script for use with AVISynth.
Although at first sight the program seems to offer too much information in too small space, it's actually quite handy once you take a minute to figure it out.
This is a great program, especially if you are having overscanning issues...This programs creates a nice handy little avisynth script...Definitely give it a try if your picture is being cropped due to overscanning.