Source of imported disc data

[mnieuw at zap.a2000.nl]

I have not looked at Tellico source, maybe it already extracts the MCN.

cd-info is a 1300 line program
(https://github.com/xbmc/libcdio/blob/master/src/cd-info.c)
that makes use of libcdio 
(https://www.gnu.org/software/libcdio/)
For just retrieving the MCN, a very limited amount of code from
cd-info is likely enough.

MatN

On Tue, 16 Aug 2022 18:31:54 +0200
Bruno Cornec <bruno at victoria.frmug.org> wrote:

> Le Tue, Aug 16, 2022 at 07:01:00AM -0500, Bill Gee a écrit :
> > Date: Tue, 16 Aug 2022 07:01:00 -0500
> > From: Bill Gee <bgee at campercaver.net>
> > Subject: Re: Source of imported disc data
> > To: tellico-users at kde.org
> > 
> > Every Red Book audio CD has an MCN (Media Catalog Number).  I
> > suspect that the online databases use this as their index and as
> > the primary search criteria.  When you import a CD to Tellico and
> > get a dialog with multiple choices, I suspect that the underlying
> > database has multiple entries under the same MCN. 
> If you use CDDB to query, then the ID is computed based on the length
> of each track and their number. Which can lead to duplicates indeed.
> The way it's generally solved is by chaging the category of the CD
> (rock, classical, jazz, ...)
> 
> MCN would have been a better choice, if only it was accessible when
> you query the CD :-( 
> 
> > On a few CDs I checked, the media catalog number was the same as
> > the UPC barcode on the label insert. You can see the MCN on Linux
> > systems with a utility called cd-info.  
> 
> Ah, I've never tried that before. Will check when I'm back at home to
> see how this works on my Audio CDs
> 
> Bruno.