Nick Are you meaning from video that is exported via MixEmergency? Or perhaps you mean to a .mp4 container?
Nick If your video using H.264 video and AAC audio, then it might be easiest for you to use an app such as Remux: http://download.cnet.com/remux/3000-2194_4-75328746.html
jammindjlou312 I have a question. I know I have 2 of my computers I just got a new Imac so do I pay the $99 upgrade fee so I can put it on my iMac.
Nick I'm not sure I understand the question. If you want MixEmergency on 3 computers, you can use one authorisation code to authorise 2 of them, but will have to buy a separate one for the 3rd computer. You can read more here: http://www.inklen.com/mixemergency/faq