[vdr] Re: split up channels.conf

[Karsten Müller <kmu@ratio.de>]

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On Thursday 26 September 2002 13:25, Jeremy Hall wrote:
[...]

> I also do not see how an md5 can be regenerated to match a former
> string.  Try running md5sum on some file twice.

Huh ? If the file didn't change you'll definitely get the *exact* same 
md5 sum. But (of course) you can't reproduce a file just having its
md5sum... (*That* would be a cool compression algorithm ;) )


>
> _J
>
> In the new year, Rene Bartsch wrote:
> > Thanks! :o)
> >
> > But Jaakko Hyvatti's idea just to use the triplet is alright. We won't
> > need a MD5SUM.
> >
> > But I just realized another problem. We could have one channel on several
> > media (e.g. DVB-S/C/T).
> > So we also need a identifier for the source and build the uniqueID with
> > that four numbers.
> >
> > With the triplet we can identify the channel and with the sourceID we
> > select the channels.conf-entry for the source to be used.
> >
> > Rene
> >
> >
> > ----- Original Message -----
> > From: "Rienecker, Fa. Evenio, ITS P, M" <C.Rienecker@deutschepost.de>
> > To: <vdr@linuxtv.org>
> > Sent: Thursday, September 26, 2002 11:49 AM
> > Subject: [vdr] Re: split up channels.conf
> >
> > > 100% consent from my part.
> > >
> > > CU,
> > > Christian.
> > >
> > > > -----Original Message-----
> > > > From: Rene Bartsch [mailto:vdr@bartschnet.de]
> > > > Sent: Wednesday, September 25, 2002 7:49 PM
> > > > To: vdr@linuxtv.org
> > > > Subject: [vdr] Re: split up channels.conf
> > > >
> > > >
> > > > After all discussions I'm to tell you that we can't keep a
> > > > line-number based
> > > > channels.conf.
> > > > We need to identify every channel by a unique ID.
> > > >
> > > > In the future there will be a lot of more functions of VDR,
> > > > so we need to
> > > > keep nomalization which consequences in different tables/files.
> > > > At any projects - especially the overnight hacks - I had to
> > > > realize creating
> > > > static data-bases resulted in software which wasn't possible to be
> > > > maintained anymore with the consequence I've had to trash it.
> > > > Once half a
> > > > years work went into trash as of a little additional
> > > > data-field which broke
> > > > the static setup.
> > > >
> > > > We already suffered to similar problems with the VDR
> > > >
> > > > >1.0.4-branch (because
> > > >
> > > > of his historical growth) and we shouldn't do the same fault again
> > > > !!!
> > > >
> > > > So my suggestion:
> > > >
> > > > We create a channels.conf which holds the complete data of a channel
> > > > (source, transponder, original_network_id,
> > > > transport_stream_id, service_id,
> > > > pids, ...) and a unique ID - and nothing more.
> > > >
> > > > We should calculate the uniqueID by the MD5SUM of
> > > > original_network_id, transport_stream_id and service_id, the
> > > > identifiers according to the DVB-standard.
> > > > The MD5SUM has the advantage that any channel-generator can
> > > > recalculate the
> > > > uniqueID by original_network_id, transport_stream_id and service_id.
> > > >
> > > > For the user's OSD and the setup according to the hardware we
> > > > should use
> > > > other tables bounding the options to the uniqueID. So we can
> > > > distribute a
> > > > full channels.conf with all channels and the user's OSD-table
> > > > decides which
> > > > channels to use/favorize and we won't have problems with
> > > > hardware-related
> > > > things like DISEC.
> > > >
> > > > If we do a bad job here the 1.1.x-branch of VDR will become
> > > > obsolete within
> > > > one year - I don't want to waste such a good software and all
> > > > the great work
> > > > you did for us!
> > > >
> > > > Rene
> > >
> > > --
> > > Info:
> > > To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe vdr"
> > > as
> >
> > subject.
> >
> >
> >
> >
> > --
> > Info:
> > To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe vdr"
> > as subject.

- -- 
with best regards
- ---
Karsten Mueller
Softwaredevelopment / Keyaccount Manager
RATIO Entwicklungen GmbH
Admiralitaetstr. 59
20459 Hamburg
Email: mailto:kmu@ratio.de

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