[M4IF Technotes] Re: MPEG4-Help

[B.P.Harish]

Hi all,
I am trying to extract out an video
object(say,foreground object) from MPEG4 bitstream.
After going thr' 14496-1 systems document I have
follg. queries.
1.Are Descriptor tags preceded by 23 0's & a 1 like
start codes of Part2(visual)?
2.No mention of system start codes(0xc6 to 0xFF as
given in Visual part) in Systems document.
3. Object profile indication of decoder config
descriptor gives us the profile encoded,say
simple,core, main etc. But how do I know the no. of
objects encoded & their OD-ID's?
4.How many times a OD appear in mpeg4 bitstream?
5.Knowing ES-ID's associated with a OD of a media
object, How do I acess ES's & where is the end point
for a ES? Because I understand that a ES corresponds
to a object. By segregating the ES I should be able to
extract out object. Am I right?
Thanks in advance,
Regards,
b.p.harish
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