Hi Jean-Christophe, thanks for your reply.
Quicktime seems to be the best at doing simple things like adding audio to video or just joining two videos without rerendering and losing quality.
I have QT10 on a Mac and was trying to add audio to an AVI file. QT said that I didn’t have the correct codec so I couldn’t open the AVI.
I ended up doing it in After Effects (which read the AVI) and exporting with lossless settings, although this probably does lose some quality I would guess.
Adding audio to video without having to rerender seems like such a simple thing that most programs would have, but doesn’t seem like it. Or maybe I’m missing something?
thanks again