mp4tools is the way to go. I've had it in my video tool box for years and the developer is very responsive with updates. It is free "trialware" and has almost complete functionality (you get a nag screen and can only do 1 job at a time). However, if it works for you, I encourage paying for it, the developer deserves the support for making and maintaining such a good app.
Edit: and why are you reviving this year old thread that already contains the information you are looking for?