[Abcde-users] Musicbrainz lookup from flac image

[John Lane]

On 25/04/18 13:56, Steve McIntyre wrote:
> On Wed, Apr 25, 2018 at 12:54:43PM +0100, John Lane wrote:
>> I am ripping a load of CDs, my workflow with abcde comprises two steps:
>>
>> $ abcde -1 -o flac -a default,cue
>> $ abcde -d album.flac
>>
>> Usually this works fine, but some discs are correctly looked up on
>> Musicbrainz in step 1 but step 2 does not find the Musicbrainz match,
>> only cddb.
>>
>> No idea why this is or what I should do to help troubleshoot it?
> 
> Hi John,
> 
> The first thing I'd look for is a debug log with one of the failing
> flac files. My guess for the failure would be incorrect offset
> calculations...
> 

Steve I think the problem occurs when a disc has a pregap. I've just
encountered another one and can summarise the logs as follows:

Log extract from disc rip (whole disc or separate tracks - doesn't matter):

Table of contents (audio tracks only):
track        length               begin        copy pre ch
===========================================================
  1.    19928 [04:25.53]       32 [00:00.32]    no   no  2
  2.    17140 [03:48.40]    19960 [04:26.10]    no   no  2
  3.    13550 [03:00.50]    37100 [08:14.50]    no   no  2
  4.    11095 [02:27.70]    50650 [11:15.25]    no   no  2
  5.    13792 [03:03.67]    61745 [13:43.20]    no   no  2
  6.    18230 [04:03.05]    75537 [16:47.12]    no   no  2
  7.    15105 [03:21.30]    93767 [20:50.17]    no   no  2
  8.    13168 [02:55.43]   108872 [24:11.47]    no   no  2
  9.     9500 [02:06.50]   122040 [27:07.15]    no   no  2
 10.    35757 [07:56.57]   131540 [29:13.65]    no   no  2
TOTAL  167265 [37:10.15]    (audio only)

vvecho 'makeids: PREGAP 32, LEADIN 150, LEADOUT 167265'


Log extract from whole-disc flac rip:

  TRACK 01 AUDIO
    INDEX 00 00:00:00
    INDEX 01 00:00:32
  TRACK 02 AUDIO
    INDEX 01 04:26:10
  TRACK 03 AUDIO
    INDEX 01 08:14:50
  TRACK 04 AUDIO
    INDEX 01 11:15:25
  TRACK 05 AUDIO
    INDEX 01 13:43:20
  TRACK 06 AUDIO
    INDEX 01 16:47:12
  TRACK 07 AUDIO
    INDEX 01 20:50:17
  TRACK 08 AUDIO
    INDEX 01 24:11:47
  TRACK 09 AUDIO
    INDEX 01 27:07:15
  TRACK 10 AUDIO
    INDEX 01 29:13:65

vvecho 'makeids: PREGAP 32, LEADIN 150, LEADOUT 167297'

Note the LEADOUT is different by the size of the PREGAP:

167297 - 167265 = 32 = pregap

I suspect that's the problem.

I have the 3 logs and can forward if you still need them. I can open a
bug if you'd like me to?

Many thanks,
John