[linux-dvb] DVB file formats

Andrew de Quincey adq_dvb at lidskialf.net
Thu Jun 16 14:50:39 CEST 2005


On Thursday 16 June 2005 13:35, Manu Abraham wrote:
> 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 ?

Aren't bouquets roughly equivalent to preset channel groupings provided by the 
broadcaster? Maybe it would make sense to store them in the presets file 
format.




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