[M4IF Technotes] 'config' parameter in the case of MP4V-ES payload name

[Neelakanth]

> Hi,
>     I have a question regarding the 'config' field
> in the 'fmtp' parameter (within the SDP)
>     in the case of MP4V-ES payload name.
>  
>     1. How to extract the 'profile-level-id' field
> from this 'config' field?
>     2. Which is the syntax of this 'config'
> parameter?

syntax for config is 
DecoderSpecificInfo as mentioned in 8.6.7 of 14496-1
and 'profile-level-id' field can be parsed from config
field, since it is mentioned 
Profile-level-id:
For visual streams, this parameter is the decimal
value from Table G-1 (FLC table for profile and level
indication of ISO/IEC 14496- 2,indicating which MPEG-4
Visual tool subsets are applied to encode the visual
stream. 
profile-level-id is same as
profile_and_level_Indication found at
VisualObjectSequence()in 6.2.2 of 14496-2.
This is what I understand. If I am wrong please
correct me.
One question to u all
For audio streams, 'profile-level-id' parameter is the
decimal value from Table 5
audioProfileLevelIndicationValues) in ISO/IEC 14496-1,
indicating which MPEG-4 Audio tool subsets are applied
to encode the audio stream.
For Visual streams, why it can't be
visualProfileLevelIndication Values of Table 6 in
ISO/IEC 14496-1 ?
Is it correct to parse the visual stream?
Thanks and Regards
Neelakanth
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