It would be nice if faac would support the m4b
extension just as it supports the m4a extension. If a
file has the MP4 container and has an m4b extension
instead of a m4a extension, then it gets treated as an
audiobook and will remember where you left off.
Is it possible for someone to add it? If it helps I
might be able to provide a patch for the change. It
looks like it would not be very difficult. Right now I
have to manually rename the file and it would be nice
if we didn't have to do that.
Basically, m4a and m4b would be the same thing.