Toast is the master of burning with mac. Even apple techs whisper the same thing that it's even better than apple's. Toast can convert most video & audio formats including mpegs 1-4, divx, mov, etc. Also lots of audio formats, disk images for mac & windows, etc.

FYI if you have a new mac with a new brand burner, you may need Toast updates which you can get from the roxio site. If still problems getting it to recognise your burner, then use PatchBurn to fix the issue which you can google to find (it's free.)