AAC in AVI is possible in principal, but to be 100% AVI spec compliant it needed to be CBR ( Constant Bitrate ). Of course, maybe the same hack as with VBR MP3 in AVI would work, but then you cant use an ACM codec anymore but have to hardcode AAC support into the AVI writing app, like VirtualdubMod. Cyrius, the main dev of it, has no intention do so he once told me ....
And now that we have the beautiful, wonderful, and extensible Matroska, we really don't have much need for it.
Do you need to register with Microsoft if you are going to use AAC within the AVI container? Do you need some kind of Microsoft Development Tool Kits to develope an ACM codec?
About Microsoft: they consider AVI as an obsolete format, and they don't support or help independant developers (because they don't need nor like them). So don't expect much from them.
If AAC has constant frame duration, then the MP3 hack would work, but according to the specs I have, AAC can have variable frame duration...
Then it is possible to hack it into AVI
Hehe, Nic once made a program which put aac into wav so you could mux it into avi, it used to be available on rarewares but I can't find it there anymore. It was called Nic's crappy beta IIRC. It didn't work all that well either.
In the other thread I started on this topic Latexxx notes that the AAC parser filter isn't working. Is he correct?It seems like he might just be missing a filter.
There is. I did it a few minutes ago. I just need to try with multichannel AACs now, and have to find a way to read AAC from AVI back (which will be total crap, since it requires to be read binary, like an MP3 stream, but lacks proper stream headers, once the ADTS headers are striped).