It depends on your OS, I always use Handbrake, it's easy to use but can convert anything to anything. Only issue is Handbrake has now stopped working on my OS due to a Ubuntu upgrade
Is anyone else out there got some good suggestions for this, that works on ubuntu 9.10? if not i'll just wait for handbrake 0.94 to come out - hopefully won't be long......
(belive handbrake still works perfectly on windows and mas OSs)