[Mp4-tech] Need help on " Hint tracks " in mp4 files

[Raghavendra K M]

Hi all,
Can anybody please explain the basics of  " HINT tracks " in mp4 files.
I just know that that it is used by streaming servers to construct packets
while streaming ( correct if I am wrong here )
What I would like to know is
1. How is to create a hint trak while creating a .mp4 file
2. How the server would use the "stbl" table info to create packets
3. 14496-12 gives no info on "stsd" ( sample description ) for HINT tracks ,
how to interpret and analyze
    chunk of data  within "stsd" atom for hint tracks.
-thanks and regards,
Raghu
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