[linux-dvb] DVB file formats

Manu Abraham manu at kromtek.com
Thu Jun 16 14:35:57 CEST 2005


Andrew de Quincey wrote:
> On Thursday 16 June 2005 12:45, Johannes Stezenbach wrote:
>>On Thu, Jun 16, 2005 at 02:10:10PM +0400, Manu Abraham wrote:
>>>Is service_id supposed to be unique in a bouquet too ? or is it only in
>>>a transponder ?
>>ETSI TR 101 211 says (4.1.1 Network Information Table (NIT) information):
>>
>>"The SI uses two labels related to the concept of a delivery system,
>>namely the network_id and the original_network_id.
>>The latter is intended to support the unique identification of a
>>service, contained in a TS, even if that TS has been
>>transferred to another delivery system than the delivery system where it
>>originated. A TS can be uniquely referenced
>>through the path original_network_id/transport_stream_id.
>>A service can be uniquely referenced through the path
>>original_network_id/transport_stream_id/service_id. The
>>network_id, thus, is not part of this path.
>>
>>In addition each service_id shall be unique within each
>>original_network_id. When a service (contained inside a TS) is
>>transferred to another delivery system, only the network_id changes,
>>whereas the original_network_id remains
>>unaffected."
>>
>>However, in practise you cannot rely on this.
> 
> Is it worth supporting bouquets in the file formats do you think? None of the 

I think if we were to support Bouquets, the config would be become 
larger, but we can have them cached in memory only rather than write out 
to file .. ? What do you think ?


Manu





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