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Problem: Multiple Versions of Albums
#21
1) there are many musicbrainz tags as you said. MPD supports these:
musicbrainz_artistid: the artist id in the MusicBrainz database.
musicbrainz_albumid: the album id in the MusicBrainz database.
musicbrainz_albumartistid: the album artist id in the MusicBrainz database.
musicbrainz_trackid: the track id in the MusicBrainz database.
musicbrainz_releasetrackid: the release track id in the MusicBrainz database.
musicbrainz_workid: the work id in the MusicBrainz database.

The files I attached above have nearly all of them populated (I did automatically with Picard), but I think "musicbrainz_albumid" is enough for the scope of this thread.
Take two releases of the same album (eg two CDs, or e.g. a CD and a vinyl) with the same title/author. Moode should show/group them as different if the musicbrainz_albumid tag is different.

I'm not asking to implement the whole release-group/release architecture, I care only about release now, aka tag musicbrainz_albumid, NOT release group.
quote from mb's docs:

Quote:release group, just as the name suggests, is used to group several different releases into a single logical entity. Every release belongs to one, and only one release group.
Both release groups and releases are "albums" in a general sense, but with an important difference: a release is something you can buy as media such as a CD or a vinyl record, while a release group embraces the overall concept of an album -- it doesn't matter how many CDs or editions/versions it had.
When an artist says "We've released our new album", they're talking about a release group. When their publisher says "This new album gets released next week in Japan and next month in Europe", they're referring to the different releases that belong in the above mentioned release group.
MusicBrainz automatically considers every release in the database to be part of a release group, even if this group only contains the one release. When a brand new release is added to the database, a new release group is automatically added as well.



2) yes you're right. good catch. they had it, something went wrong in the naming script. fixed the previous attachment.
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#22
Yeah, but there ain't no MUSICBRAINZ_ALBUMID here, mate.

Code:
kreed@T520:~/Downloads/challenge/In Step_EK45024$ mediainfo "01 The House Is Rockin'"
General
Complete name                            : 01 The House Is Rockin'
Format                                   : FLAC
Format/Info                              : Free Lossless Audio Codec
File size                                : 565 KiB
Duration                                 : 32 s 26 ms
Overall bit rate mode                    : Variable
Overall bit rate                         : 145 kb/s
Album                                    : In Step
Part                                     : 1
Part/Total                               : 1 / 1
Track name                               : The House Is Rockin'
Track name/Position                      : 1
Track name/Total                         : 10 / 10
Performer                                : Chris Layton (membranophone and percussion);Tommy Shannon (bass guitar);Stevie Ray Vaughan (guitar family);Reese Wynans (keyboard);Stevie Ray Vaughan (vocals)
Composer                                 : Stevie Ray Vaughan and Double Trouble
Label                                    : Epic
Genre                                    : Test
Recorded date                            : 1989
ISRC                                     : USSM18900387
MUSICBRAINZ_RELEASEGROUPID               : 889b20e8-c7e6-3f77-bced-31667be37b57
ORIGINALDATE                             : 1989-06-06
ORIGINALYEAR                             : 1989
RELEASETYPE                              : album
BARCODE                                  : 0208313823274
RELEASESTATUS                            : official
ENGINEER                                 : Jim Gaines / Richard McKernen / Richard Mullins
MIXER                                    : Jim Gaines / Dave McNair
PRODUCER                                 : Jim Gaines / Stevie Ray Vaughan and Double Trouble
ALBUMARTISTSORT                          : Vaughan, Stevie Ray and Double Trouble
CATALOGNUMBER                            : EK 45024
SCRIPT                                   : Latn
RELEASECOUNTRY                           : US
MEDIA                                    : CD
ARTISTSORT                               : Vaughan, Stevie Ray and Double Trouble
ARTISTS                                  : Stevie Ray Vaughan and Double Trouble
MUSICBRAINZ_RELEASETRACKID               : 2f06aafb-728a-37a7-b24c-15e7f2061c1d
Album/Composer                           : Stevie Ray Vaughan and Double Trouble
FileExtension_Invalid                    : flac
...


I'm just saying Tongue

Regards,
Kent
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#23
ok I get it damn picard lol let me check what it did... I see it populated on picard, let me check the defaults.

EDIT> How are you checking the tags, I can see them correctly applied. e.g. here using metaflac on linux cli output, look at comment[6]: 
Code:
$ metaflac --list 01\ The\ House\ Is\ Rockin\'.flac
METADATA block #0
  type: 0 (STREAMINFO)
  is last: false
  length: 34
  minimum blocksize: 4608 samples
  maximum blocksize: 4608 samples
  minimum framesize: 15 bytes
  maximum framesize: 2147 bytes
  sample_rate: 44100 Hz
  channels: 2
  bits-per-sample: 16
  total samples: 1412376
  MD5 signature: ff917b46a7f3bc76c02732b4f2e504ce
METADATA block #1
  type: 3 (SEEKTABLE)
  is last: false
  length: 54
  seek points: 3
    point 0: sample_number=0, stream_offset=0, frame_samples=4608
    point 1: sample_number=470016, stream_offset=203176, frame_samples=4608
    point 2: sample_number=940032, stream_offset=407410, frame_samples=4608
METADATA block #2
  type: 4 (VORBIS_COMMENT)
  is last: false
  length: 1572
  vendor string: reference libFLAC 1.1.0 20030126
  comments: 46
    comment[0]: GENRE=Test
    comment[1]: MUSICBRAINZ_DISCID=LLTPDZXgNO6_NFUKC8eHkVYFOdo-
    comment[2]: MUSICBRAINZ_RELEASEGROUPID=889b20e8-c7e6-3f77-bced-31667be37b57
    comment[3]: ORIGINALDATE=1989-06-06
    comment[4]: ORIGINALYEAR=1989
    comment[5]: RELEASETYPE=album
    comment[6]: MUSICBRAINZ_ALBUMID=87fc0ed7-e0d9-4df6-91d0-a3950099bbde
    comment[7]: SCRIPT=Latn
    comment[8]: LABEL=Epic
    comment[9]: CATALOGNUMBER=463395 2
    comment[10]: MUSICBRAINZ_ALBUMARTISTID=e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
    comment[11]: ALBUMARTIST=Stevie Ray Vaughan and Double Trouble
    comment[12]: ALBUMARTISTSORT=Vaughan, Stevie Ray and Double Trouble
    comment[13]: ENGINEER=Jim Gaines
    comment[14]: ENGINEER=Richard McKernen
    comment[15]: ENGINEER=Richard Mullins
    comment[16]: PERFORMER=Chris Layton (membranophone and percussion)
    comment[17]: PERFORMER=Tommy Shannon (bass guitar)
    comment[18]: PERFORMER=Stevie Ray Vaughan (guitar family)
    comment[19]: PERFORMER=Reese Wynans (keyboard)
    comment[20]: PERFORMER=Stevie Ray Vaughan (vocals)
    comment[21]: MIXER=Jim Gaines
    comment[22]: MIXER=Dave McNair
    comment[23]: PRODUCER=Jim Gaines
    comment[24]: PRODUCER=Stevie Ray Vaughan and Double Trouble
    comment[25]: ASIN=B0000247H9
    comment[26]: BARCODE=5099746339524
    comment[27]: RELEASESTATUS=official
    comment[28]: RELEASECOUNTRY=GB
    comment[29]: DATE=1989
    comment[30]: ALBUM=In Step
    comment[31]: TOTALDISCS=1
    comment[32]: MEDIA=CD
    comment[33]: DISCNUMBER=1
    comment[34]: TOTALTRACKS=10
    comment[35]: MUSICBRAINZ_TRACKID=98ade8e0-2681-4896-b3ae-5fc44cab7d2c
    comment[36]: ISRC=USSM18900387
    comment[37]: TITLE=The House Is Rockin'
    comment[38]: MUSICBRAINZ_ARTISTID=e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
    comment[39]: ARTIST=Stevie Ray Vaughan and Double Trouble
    comment[40]: ARTISTSORT=Vaughan, Stevie Ray and Double Trouble
    comment[41]: ARTISTS=Stevie Ray Vaughan and Double Trouble
    comment[42]: MUSICBRAINZ_RELEASETRACKID=29366203-a233-3c8b-8b0b-e380402c5aac
    comment[43]: TRACKNUMBER=1
    comment[44]: TRACKTOTAL=10
    comment[45]: DISCTOTAL=1
METADATA block #3
  type: 1 (PADDING)
  is last: true
  length: 2564
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#24
metaflac vs mediainfo... 
I think you've got an issue there  Big Grin

adding also ffprobe output and the MUSICBRAINZ_ALBUMID tag is there...

Code:
ffprobe -hide_banner 01\ The\ House\ Is\ Rockin\'.flac
Input #0, flac, from '01 The House Is Rockin'.flac':
 Metadata:
   GENRE           : Test
   MUSICBRAINZ_DISCID: LLTPDZXgNO6_NFUKC8eHkVYFOdo-
   MUSICBRAINZ_RELEASEGROUPID: 889b20e8-c7e6-3f77-bced-31667be37b57
   ORIGINALDATE    : 1989-06-06
   ORIGINALYEAR    : 1989
   RELEASETYPE     : album
   MUSICBRAINZ_ALBUMID: 78cd46b0-d661-3e57-81c8-fcfd54b4b391
   BARCODE         : 0208313823274
   RELEASESTATUS   : official
   ENGINEER        : Jim Gaines;Richard McKernen;Richard Mullins
   PERFORMER       : Chris Layton (membranophone and percussion);Tommy Shannon (bass guitar);Stevie Ray Vaughan (guitar family);Reese Wynans (keyboard);Stevie Ray Vaughan (vocals)
   MIXER           : Jim Gaines;Dave McNair
   PRODUCER        : Jim Gaines;Stevie Ray Vaughan and Double Trouble
   MUSICBRAINZ_ALBUMARTISTID: e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
   album_artist    : Stevie Ray Vaughan and Double Trouble
   ALBUMARTISTSORT : Vaughan, Stevie Ray and Double Trouble
   LABEL           : Epic
   CATALOGNUMBER   : EK 45024
   SCRIPT          : Latn
   ALBUM           : In Step
   DATE            : 1989
   RELEASECOUNTRY  : US
   TOTALDISCS      : 1
   TOTALTRACKS     : 10
   MEDIA           : CD
   disc            : 1
   MUSICBRAINZ_TRACKID: 98ade8e0-2681-4896-b3ae-5fc44cab7d2c
   MUSICBRAINZ_ARTISTID: e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
   ARTIST          : Stevie Ray Vaughan and Double Trouble
   ARTISTSORT      : Vaughan, Stevie Ray and Double Trouble
   ARTISTS         : Stevie Ray Vaughan and Double Trouble
   TITLE           : The House Is Rockin'
   ISRC            : USSM18900387
   MUSICBRAINZ_RELEASETRACKID: 2f06aafb-728a-37a7-b24c-15e7f2061c1d
   track           : 1
   TRACKTOTAL      : 10
   DISCTOTAL       : 1
 Duration: 00:00:32.03, start: 0.000000, bitrate: 144 kb/s
   Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
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#25
Fascinating. I can confirm. First time I've seen a swing and a miss from mediainfo. 

Out of the 7 MUSICBRAINZ_... IDs recorded in the metadata tag of the track I examined, only two are reported by mediainfo. Never noticed before because I've never had an occasion to work with MB database info.

Too bad, because unlike metaflac it's a more or less a "universal format" tool.

Regards,
Kent
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#26
FYI, here's what the mpd protocol reports for one of your tracks:


Code:
currentsong
file: SDCARD/In Step-albumid_tags/In Step_EK45024/01 The House Is Rockin'.flac
Last-Modified: 2020-09-11T18:50:47Z
Genre: Test
OriginalDate: 1989-06-06
MUSICBRAINZ_ALBUMID: 78cd46b0-d661-3e57-81c8-fcfd54b4b391
Performer: Chris Layton (membranophone and percussion)
Performer: Tommy Shannon (bass guitar)
Performer: Stevie Ray Vaughan (guitar family)
Performer: Reese Wynans (keyboard)
Performer: Stevie Ray Vaughan (vocals)
MUSICBRAINZ_ALBUMARTISTID: e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
AlbumArtist: Stevie Ray Vaughan and Double Trouble
AlbumArtistSort: Vaughan, Stevie Ray and Double Trouble
Label: Epic
Album: In Step
Date: 1989
Disc: 1
MUSICBRAINZ_TRACKID: 98ade8e0-2681-4896-b3ae-5fc44cab7d2c
MUSICBRAINZ_ARTISTID: e3c8b0c8-3fa0-464b-b1f5-119cb52d3817
Artist: Stevie Ray Vaughan and Double Trouble
ArtistSort: Vaughan, Stevie Ray and Double Trouble
Title: The House Is Rockin'
MUSICBRAINZ_RELEASETRACKID: 2f06aafb-728a-37a7-b24c-15e7f2061c1d
Track: 1
Time: 32
duration: 32.026
Pos: 63
Id: 64
OK

This is mpd v0.21.24 (which echoes "OK MPD 0.21.11" because the protocol version increments more slowly than the software version; a source of confusion.)

Note that MPD is pretty cavalier about the case of labels. Fortunately, the mpc commands and also the protocol commands seem to crush the case, so "mpc list MuSiCbRaInZ_aLbUmId", "mpc list musicbrainz_albumid", and "mpc list MUSICBRAINZ_ALBUMID" all return the same list; similarly for the protocol list command.

Regards,
Kent
Reply
#27
ok thank you for the test, wasn't at home. It seems they're fine? (the "test" in the genre tag was intentional)
Interesting info on the tag case handling.

Getting back on track, I edited the files and added a comment tag too, so now I think they are useful for the scope of this thread.

@Tim Curtis
this should be the definitive version  Big Grin
remember these have the real music tags, but they are 1kHz test tones.

to recap since it's getting pages long...
Moode should also use the musicbrainz_albumid to form the unique album key, as you were saying previously.
Once grouped by that, moode's library would show them as two separate albums, albeit with same name. (while keeping the sorting options in appearance or people get angry)
The comment tag should then be readily available somehow in the UI, we could use that to distinguish them in the library view. 
As today the de facto standard seems to store these kind of info in the comment, even though musicbrainz talks about catalognumber tag, but that's not supported by all formats/players nor mpd as now.

This feature would help not only to distinguish between releases of the same medium, but also between CDs / web releases / Vinyl rips of the same album as long as they have an unique musicbrainz_albumid / the correct musicbrainz tags.
Note, i don't like musicbrainz too much, but since mpd is supporting those fields I think that's the way to do it.

maybe useful from picard docs, musicbrainz tag mapping in the various formats, as posted also by @TheOldPresbyope :
   
__________
(same files as post #19, just added comment tag)
these are the two folders inside the zip. they are same album but different release, some of the differences are:

  1. folder "In Step_4633952"
    catalog number: "463395 2"
    musicbrainz_albumid 87fc0ed7-e0d9-4df6-91d0-a3950099bbde
    comment: "Catalog number 463395 2, if you can see this in moode then it's working correctly."
  2. folder "In Step_EK45024"
    catalog number: "EK 45024"
    musicbrainz_albumid: 78cd46b0-d661-3e57-81c8-fcfd54b4b391
    comment: "Catalog number EK 45024, if you can see this in moode then it's working correctly."


Attached Files
.zip   In Step-albumid_tagsfixedwithcomments.zip (Size: 1.99 MB / Downloads: 2)
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#28
@challenge

Thanks for updating your files.

Regarding the metadata mapping table, we have no control over the mpd plugins. I've been creating a corpora of test files to see what gets mapped into what by them for MP3, FLAC, M4A (with ALAC), VORBIS/OGG, VORBIS/OPUS, WMA encoded/formatted audio tracks. Obviously the FLAC and the VORBIS formats would be expected to be treated the same since they all use the VORBIS COMMENT_BLOCK to contain metadata, but the others may be interesting  Big Grin 

I got sidetracked by the multiple-genre issue but that seems to be settled now.

Regards,
Kent
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