Re: grip/cdparanoia/freedb disagree on track length

Hi Jamie,

I'd guess that the CD was burned as multisession, with the data track being 
in the second session.  CDDA only allows for one session, so most standalone 
players will only read the first session, and hence only show the audio 
tracks.  I don't currently have *nix installed anywhere so I can't verify 
how Grip and cdparanoia handle data tracks on multisession CDs.  If you 
happen to have a windows machine available, I can send you a bit of code 
that can read the TOC using the subchannel, which will show exactly what the 
problem with the CD is.

In any case, the numbers do appear strange, and it probably has something to 
do with the multisession toc.

rgds,
Andy Key


>I have a CD where cdparanoia and Grip / FreeDB disagree on the length
>of the last audio track.  Grip and cdparanoia think the track is of
>length 7:06, but the FreeDB data seems to say the track is 9:38.
>
>The CD in question is "Phi in the Sky" by Kidneythieves.
>It has 6 tracks, and tracks 1-5 are fine / consistent.
>
>The FreeDB data says that track 6 is supposed to be of length 9:38.
>When Grip generates a cddb file itself, it also says 9:38 (that is,
>Grip generates cddb files consistent with the one that is currently
>on the FreeDB servers.)
>
>The Grip display, and "cdparanoia -vsQ", say that track 6 is of length
>7:06.  That's also the length of the file I get when I rip it, with
>either grip or cdparanoia.
>
>Grip and FreeDB think that there is a 7th track, a data track.
>The grip display shows:
>
>     01  5:01
>     02  6:26
>     03  3:52
>     04  8:57
>     05  5:15
>     06  7:06
>     07  0:06  (data track, presumably?)
>
>     That adds up to 36:43, or 2203 seconds.
>
>cdparanoia -vsQ is in agreement, except that it doesn't list track 7.
>It has this to say:
>
>     Table of contents (audio tracks only):
>     track        length               begin        copy pre ch
>     ===========================================================
>       1.    22635 [05:01.60]        0 [00:00.00]    no   no  2
>       2.    28902 [06:25.27]    22635 [05:01.60]    no   no  2
>       3.    17393 [03:51.68]    51537 [11:27.12]    no   no  2
>       4.    40317 [08:57.42]    68930 [15:19.05]    no   no  2
>       5.    23625 [05:15.00]   109247 [24:16.47]    no   no  2
>       6.    31968 [07:06.18]   132872 [29:31.47]    no   no  2
>     TOTAL  164840 [36:37.65]    (audio only)
>
>Note that the total length is off by 6 seconds.  I think that this
>is because the unshown data track is 6 seconds long (see below.)
>
>The freedb data is here: http://www.freedb.org/freedb/rock/5a093307
>Converted to seconds, the numbers in that file come out to:
>
>     01  5:02
>     02  6:25
>     03  3:52
>     04  8:58
>     05  5:15
>     06  9:38
>
>     That adds up to 39:10, or 2350 seconds.  This implies that
>     the data track is 0:06 long (since the cddb file says the
>     total file length is 2357.)
>
>My standalone CD player (Nakamichi MB-10) is also in agreement: it
>says there are 6 tracks (not 7!), total length 36:38 (2198) with
>track 6 being 7:06 long.
>
>So how am I ending up with CDDB / FreeDB figures that claim that
>track 6 is 9:38 instead of 7:06?
>
>Might the TOC have overlapping tracks, or something?  Is this some
>new sleazy way of hiding data tracks from audio CD players?
>
>The reason I'm concerned about this is that I have a script that
>issue warnings when my MP3 files are not the length that the CDDB
>files say they should be, so that I can tell when I've somehow
>mis-ripped something.  That script is warning about this track,
>and so I either need to know how to rip the track properly, or
>how to interpret the numbers in the CDDB file to realize that
>the track *was* ripped properly.  Because right now, the CDDB file
>is claiming that the file is two and a half minutes too short.
>
>Any suggestions appreciated...
>
>Versions:
>
>     cdparanoia-alpha9.8-11
>     grip-3.0.1-4
>     Red Hat Linux release 8.0 (Psyche)
>     Linux 2.4.18-14 #1 Wed Sep 4 12:13:11 EDT 2002 i686
>        athlon i386 GNU/Linux
>
>--
>Jamie Zawinski
>[email protected]             http://www.jwz.org/
>[email protected]       http://www.dnalounge.com/
>
>_______________________________________________
>fdb-dev mailing list
>[email protected]
>http://dtype.org/mailman/listinfo/fdb-dev


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