How to merge audio and video files on a Mac? You have everything you need - Quicktime is your tool of choice.

Mac computers don’t play AC3 files natively so what to do? And how to add them to iTunes so you can sync them to your iPod or Mp3-player of choice?
First thing’s first: How to play those files? You need to download the A52 codec, that will enable Quicktime to play the files. Read the instructions [...]