[mythtvnz] Anyone know anything about crid's in New Zealand

[Steve Hodge]

On Sun, Sep 16, 2012 at 9:09 AM, Nick Rout <nick.rout at gmail.com> wrote:

> On Sat, Sep 15, 2012 at 5:56 PM,  <ajp at cantabrian.co.nz> wrote:
> > I could not find anything other than the type of thing you found. My
> sense
> > is that the crid is valid in that it is unique and means something to
> > TVNZ/TV3 or whomever. It's just a shame it can't be looked up. It is
> quite
> > good though for testing if you have already recorded something - I do
> think
> > they keep the same crid if they rebroadcast, well at least I hope they do
> > :-)
>
> should be easy enough  to check with TV3/TV3 Plus 1
>

In the Freeview spec I linked to states:
"CRID Type 0x31
Programme CRIDs are used to identify two or more EIT events as being the
same programme and may not be used to represent other content defined by
the same Authority. This prevents duplicate programmes being recorded from
within the same series and also allows alternative programme instances to
be recorded (or offered for recording) if a booking clash occurs. An EIT
event can only be associated with a single programme CRID."

So Freeview requires that programme CRIDs should not be reused. It suggests
(but doesn't seem to require) that multiple broadcasts of the same
programme carry the same programme CRID. I'd be very surprised if recent
repeats (e.g. the +1 channels) don't have the same programme CRIDs, but I
wouldn't count on it if there is a significant gap between broadcasts.

Series CRIDs are different:
"CRID TYPE 0x32
Series CRIDs define groups of programmes linked by the series Concept. CID
that describes a Series may contain multiple CRIDs; therefore a Programme
may be part of more than one Series. Where an event is associated with more
than one series, an invitation to record ‗programmes in the same series as
this event„ would book to record all events in all series associated with
the selected event. A PVR shall store and track series CRIDs for up to 13
weeks between occurrences in EIT schedule. To allow broadcasters to reuse a
series CRID for a different editorial concept, receivers shall discard any
series CRIDs not seen in EIT for 13 weeks."

So not only are series CRIDs allowed to be reused for different content,
but the 13 weeks limit on storing them effectively means there is no
guarantee that different seasons of a particular series will carry the same
series CRID. That significantly reduces the value of them IMHO.

Cheers,
Steve
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/mythtvnz/attachments/20120916/887ec79a/attachment.html>