[linux-dvb] Re: Changing PIDS (DVB-T in the UK)

[Gavin Hamill <gdh@acentral.co.uk>]

On Monday 26 July 2004 16:31, Alistair Hamilton wrote:

> Is this something that just happens from time to time?  

It is.

> If so, do the. broadcasters tell anyone? 

Yep, the data is broadcast in the transport stream :)

> I can only assume that dedicated 
> receiver/decoders have some mechanism for dealing with these changes
> automatically. 

Yes - can you imagine the average Joe Punter trying to enter lists of 
APID/VPID/TPID many times a month? =)

> Can we do this? 

Yes, but what 'we' are you referring to? It's something that needs to happen 
in userspace - e.g. VDR now takes note of the relevant data (I can't remember 
if this is the NIT, PAT, SDT, or other three-letter acronym)...

The PIDs change around on a daily basis for some channels because they share 
capacity, e.g. CBBC/Cbeebies and BBC THREE / BBC FOUR...

So, if you wanted to do this from a more Heath-Robinson method of watching 
digital TV, it'd really need to be based on cronjobs regenerating the 
channels.conf....

gdh