[linux-dvb] Re: Reconstruct PAT/PMT tables from TS?

[Nico Sabbi <nsabbi@tiscali.it>]

w-thiel@gmx.net wrote:

> Well, what's your problem exactly?
> I have written a program to process D2Mac streams a while ago, and I
> have adopted it to DVB-S without much problems, thanks to EN 300 468.
> I think you are missing something: a table_id is a table_id a table_id.
>
>  
> > ...
> > Hmm, but table_id is not enough to identify a specific section.  Different
> > PMT's (in different PID's) all have table_id==2, don't they?  So
> >
> >    
> No. Have a look at 30west to get an idea, how PMTs can be transmitted.
> Or, even worse, have a look at 42east.
>
>  
> > - to identify the sections containing PAT, the PID _or_ table_id is
> >  sufficient.
> >
> >    
> You have to scan the PIDs given in the PMT. You cannot be sure what they
> will look like: you have to accept the things written in EN 300468, and
> you have to accept the private things.
>
>  
> > Is it possible that PMT's for different programs are transported withhin a
> > single PID?  If it's possible, can they be placed withhin the same section
> >
> >    
> Yes. See 30west.
>
>  
> > So (in contrast to EN-300468, section 5.11.1), to uniquely identify a
> > section following information is needed:
> >
> > - PID
> > - table_id (evtl table_id_extension)
> > - section_number
> > - version_number
> > - current_next_indicator
> >
> >    
> Hmh. IMHO, EN-300468 is quite clear.
> Perhaps, you should tell what your intention is, and what for.
>
> You cannot expect all transponders to provide all streams required
> by the standards: the astras are quite ok, usually, 1west/5east
> is ok (with exceptions), 30west usually is ok, 42east usually is a
> big mess.
>
> Wolfgang
>
>  
can you upload a messy sample of this 42east  to 
ftp://www.mplayerhq.hu/MPlayer/incoming
and tell me the filename, please?

Thanks,
   Nico