[M4IF Technotes] Bifs-text scene description - streaming movietexture

[Nik]

Hi streaming experts, 
I'd really appreciate help with this. 
I need a movietexture that uses live video as its source, such as
"rtsp://localhost:554/vid.mp4".
How do you specify the OD's and the ESD's for this?
Can anyone give me some pointers on this, or even the url to a similar
mp4 on the net somewhere?
I'm also a little confused as to how a player will know which track to
use from a url like "rtsp://localhost:554/vid.mp4" for the
movietexture....?
Any help very appreciated.
Kind regards, 
Nicholas.