[M4IF Technotes] mpeg4 video elementary stream

[Jayank Bhalod]

Hello Everyone,
I am having this simple question regarding mpeg-4 decoder.
How can i have one mpeg-4 elementary stream, let say first part with some
bitrate(and/or resolution) and rest with some other bitrate(and/or
resolution), with the assumption of having the same profile and level in the
entire stream.
One can repeat VideoObjectlayer() to encompass this information inside the
bitstream but is it legal from decoder perspective? Or is there any better
way to do this?
One can start the session again but isnt it ugly?
-jayank