[linux-dvb] DVB file formats

Andrew de Quincey adq_dvb at lidskialf.net
Thu Jun 16 17:08:13 CEST 2005


On Thursday 16 June 2005 13:54, Felix Domke wrote:
> Andrew de Quincey wrote:
> > On Thursday 16 June 2005 13:29, Felix Domke wrote:
> >>We have a special per-service flag, which has a meaning like "no DVB
> >>service". If this flag is set, there will be no attempt to parse any DVB
> >>tables, and just take the ES-Pids. We then invent a random SID, thus
> >>having an arbitrary es-pid-combination which behaves like a service.
> >>With this, we support stuff like feeds, with only minimal changes.
> >
> > Do you mean stuff like a feed from an mpeg2 encoder?
>
> With "feeds" I generally mean services which are setup to just transport
> a video/audio stream over a satellite, not meant to be used by the user,
> but for example to transfer raw, uncut footage or something to the studio.
>
> Sometimes they are encrypted, but most of the time they just use obscure
> parameters so nobody finds them ;)
>
> They are MPEG2, as usual, but most of the time they have varying SIDs or
> even no PMTs at all.

What do you think of the pmt_extra idea I've just added to the wiki page?

(BTW the URL is http://www.linuxtv.org/wiki/index.php/File_Format_Comparison 
in case anyone missed it the first time/has lost it in the meantime)




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