[M4IF Technotes] Mpeg-4 - hex values and authoring tool

[Nik]

Hi there :)
Firstly, can anyone tell me where to find a table of the supported
stream types for the mux'er, and their equivalent hex values?	I'm
especially looking for the Mpeg-4 file type value.
Secondly, what are the tools being used to author mpeg-4 content? I mean
of course the BIFS/OD streams, layout etc., not the AV compression.  If
the answer is to do it in XMT, are there any preferred tools for
authoring in it?
Thanks in advance, 
Regards,
Nicholas.