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Re: IP-DVB question: Section packing with short DATA
On Wed, 2002-11-27 at 14:58, Julien Fasson wrote:
>
> I'm wondering about section packing:
> when small sections have to be encapsulated in Transport Stream packets (<184 B), is there padding or not? And if there is, could it be that more than 2 small sections(<60B) may be encapsulated in a same MPEG-TS packet?
> If it is possible, I would like to know how does the pointer enable such a thing? Is there any specific mechanism?
>
Hi Julien.
The pointer field gives you the offset to the first payload starting in
the particular tsc. For finding a potential further payload starting
within the same tsc, you would have to consider the section-length of
the first new payload. For distinguishing the beginning of a further
section from cell-padding you would then have to check the table-id
field, if it's 0xff (not allowed as table-id), it is padding (which
should be 0xff).
--
Dipl.Ing. Peter Maurutschek +43 662 8044 6351
Computer Science Dept. pmm@cosy.sbg.ac.at
Salzburg University, Austria http://www.cosy.sbg.ac.at/~pmm/