AAC all the way....
I don't see AAC anywhere in Quicktime's audio codec list. Does it go by other name?
Sorry, didn't consider that AE only uses AAC with its own H.264 encoders. In thjat case I guess you are tuck with IMA or MACE. However, Adobe Media encoder will allow AAC for QTs, so export uncompressed from AE end then run the files through AME.
Ya, it's bizarre.... AE has some features on its Render section, and some on it's export (....ex. You can only set Fast Start if you are exporting, not in the regular render area).
What I did since then is just render an uncompressed QT of the clip, and brought it into the standalone QT Pro player. As luck would have it, it allows AAC as an audio codec when doing an H.264 format clip. So, I'll try that out.
Ya, I was using IMA 4:1 previous to that... Seemed safe. Previous to THAT (up to a day or two ago), I was always using None, as I had no clue about any of the audio codecs, since the manual doesn't appear to make any mention of them.
I'm STILL trying to get my QTs to Fast Start... Something seriously wrong.... The HTML code AND the files SEEM to be fine, yet it still won't do it.... (although it did do it once or twice, but not since, while I was testing yesterday).
I'm trying exporting completely out of the standalone QT Pro player... I suspect something is fishy with AE's Fast Start encoding. Should work 'out of the box'... No idea why it's not....
[OT Update]: Weird... Turns out that it DOES appear that AE CS3 has issues rendering Fast Start QTs... even if I have QT Pro installed.
When I create the Fast Start movie with the QT Pro standalone, it actually works! (Fast Starts properly online)... whereas if I try the same thing in AE, it doesn't (even though it doesn't complain about anything being wrong).
So, I guess I have to just export uncompressed QTs out of AE, then bring them into the QT Pro standalone, and spit them out as H.264/AAC Fast Start mov's.
As long as it works....