Hi, I know this is a longshot, but I haven't had any luck elsewhere... Does anyone know the structure of the AMR audio format? I'm looking for information on how long the header is so I know exactly where the audio data starts, similar to this document for the WAV format. Thanks, Miranda

I haven't examined it closely, and I don't have any .AMRs to test with, but here's a link I found that might be useful:

Clicky

That page has a link to an RFC that might be the format description for AMR files/streams (I think it's a streaming format based on the title of the RFC).

EDIT: another one, source code from ffmpeg:

Clicky 2

Thanks!
I have seen he first one, and it is the closest I have gotten so far, but it doesn't give all the info, but the second one looks like it might help.

Thanks again.