Found this on xlr8yourmac:
You can get the app here and it would also be worthwile to check out this thread.
forty-two
What is forty-two?
forty-two is a system, comprised of the forty-two.app GUI, the dvdmp and dvdvx engines and certain *nix tools used for video compression and conversion. It is designed to be a simple, hassle-free tool for converting DVD's to other formats, such as DiVX, SVCD or VCD.
What makes forty-two different is that it is driven by logic; it determines proper encoding framerates, cropping etc and produces in-sync, set and forget results for all dvd types it supports. forty-two doesn't just pass switches to Open Source tools. It uses different methodologies from current make tools to insure that in sync conversions *can* be done, based on the content.
forty-two will convert DVDs with ac3 audio to VCD, SVCD, DVD or DiVX AVI, including user rates. If your DVD is PCM only or DTS only, you can only convert it to DiVX AVI with forty-two at this time.
Requirements
forty-two requires a Macintosh computer running MacOS X 10.2.3 or above. Your computer must be able to play DVDs.The BSD must be installed on your current system. (install via your OS X install disc)
You can get the app here and it would also be worthwile to check out this thread.