[M4IF Technotes] Sub-part of a presentation

[Christopher Wendt]

Hi Richard, all,
> Where does this root OD exist in the remote file?  In the iods?
Yes.
> If so, the
> iods can contain only one OD and a single OD cannot refer to both a video
> and an audio stream.
Right, this is probably not the optimal way to do it (a least just for an
A/V presentation), it's more useful for inline scenes actually.  You require
a BIFS and OD streams for the root OD.
> OK... the specification for the file format states that the iods is
> mandatory.  Is that not true in this case?  Or can an iods exist but not
> contain an IOD or OD?
The iods atom is not required for the case of using data reference.  If you
don't have an IOD or root OD, then don't create a iods atom.
-Chris
-------------------------------------------------------------
Christopher Wendt,  avipix, llc
chris   avipix.com
(732) 682-5549
http://www.avipix.com