Music scanner matches artist to wrong album

Server Version#: 1.18.7.2415

I added my ripped CD collection to Plex. In a few I noticed that a single artists was matched to wrong albums, and was showing up multiple times in the Artist view. See “Classique Metropolitain” below:

Selecting one of the entries shows an album that that artist does not appear on at all.

Edit screen shows Album Artist set to “Classique Metropolitain”, but that is incorrect:

The artist shows up nowhere in the mp3 tags, as evidenced by ffprobe:

$ ffprobe -hide_banner \(2003\)\ Ultimate\ Lounge\,\ Disc\ 1/Disc\ 1\ –\ 02\ –\ Llorca\ with\ Nicole\ Graham\ –\ Indigo\ Blues.mp3 
[mp3 @ 0x1937c80] Skipping 0 bytes of junk at 27969.
[mjpeg @ 0x1940040] Changeing bps to 8
Input #0, mp3, from '(2003) Ultimate Lounge, Disc 1/Disc 1 – 02 – Llorca with Nicole Graham – Indigo Blues.mp3':
  Metadata:
    AccurateRipDiscID: 013-001e9bce-0138226c-b20f830d-2
    AccurateRipResult: AccurateRip: Accurate (confidence 6)   [4C86691E]
    replaygain_track_gain: -7.91 dB
    replaygain_track_peak: 0.988525
    TIT1            : Club/Dance/Lounge/Electronica/Downtempo
    title           : Indigo Blues
    album           : Ultimate Lounge, Disc 1
    encoded_by      : dBpoweramp Release 16.4
    publisher       : Water Music Records
    composer        : Nicole Graham/Llorca
    TMED            : CD (Lossless)
    genre           : Electronic
    compilation     : 1
    Encoder         : Lame 3.100.0
    track           : 2/13
    disc            : 1/2
    artist          : Llorca with Nicole Graham
    date            : 2003
  Duration: 00:05:35.57, start: 0.025056, bitrate: 221 kb/s
    Stream #0:0: Audio: mp3, 44100 Hz, stereo, s16p, 221 kb/s
    Metadata:
      encoder         : LAME3.100

So, any idea what may have gone wrong and how to fix it?

It looks to me like your file names might be the problem. For one thing, the disc number should not be in the file name. Follow the advice in this post and see if it improves things.

Also, is your server set up to prefer local metadata?

Yes, I have “Prefer Local Metadata” checkbox enabled. Shouldn’t it not care about the filenames in this case?

Also, the post you linked does not explain how to name folders/files when an album has multiple discs. Are there guidelines for that?

You’d think so, but no, Plex still depends on it. Even more than it used to, but I don’t know why. That’s something I’ve been discussing with one of the developers.

For multi-disc albums, if the metadata has the discnumber tag set, and ‘album’ and ‘artist’ tags (except for ‘various artist’ albums) are identical for all tracks on all discs, it won’t matter if the files are in a single folder, or in ./disc1 and ./disc2 subfolders. Here’s a screenshot of one of mine:


The folder structure for the above is:
Music/Pop/Abba/The Definitive Collection/trackname.flac

Note the track numbers are shown as “01/xx.” That still works, I think, but I think it’s not recommended. I’ve changed them to just tracknumbers without the “/disc#.” (this is an old screenshot).

Oh, one other thing: I did a little testing when they were developing the recent improvements in metadata scanning. One thing that I learned from that is that it’s best if the ‘album’ tag is identical to the folder name where the tracks are stored (as much as possible, anyway. Tags allow ‘/’ characters, for example, but folder names don’t). This caused some real headaches with my classical albums.

I’ll give it a shot and report back.

Following up.

I read the linked post that stated:

You now always need to have the principal structure of
music / album artist / album title / tracks

But it wasn’t clear what to do with certain albums. I decided to start from scratch.

I removed the Music library from Plex, stopped the PMS, deleted the cache files related to music, and started the server. I created a new folder in which I put a single album, the Pulp Fiction soundtrack, and then added this folder as a new Music library, using “Prefer Local Metadata” option.

The result is that after scanning, the album appears under Cassius (which was one of the artists in the old library), instead of Various Artists.

How should my compilation/soundtrack albums be tagged and structured on the disk? Here’s what I have so far:

  1. Album folder is in /Music/Plex/Various Artists/(1994) Pulp Fiction (Soundtrack)
  2. File is named 06 – Ricky Nelson – Lonesome Town.mp3
  3. The relevant ID3v2 tags in the file are:
TIT2 (Title/songname/content description): Lonesome Town
TALB (Album/Movie/Show title): Pulp Fiction (Soundtrack)
TSRC (ISRC (international standard recording code)): USCA20501028
TENC (Encoded by): dBpoweramp Release 16.6
TPUB (Publisher): MCA
TSSE (Software/Hardware and settings used for encoding): -V="1"
TMED (Media type): CD (Lossless)
TCON (Content type): Soundtrack (24)
TYER (Year): 1994
TRCK (Track number/Position in set): 6/16
TPOS (Part of a set): 1/1
TPE1 (Lead performer(s)/Soloist(s)): Ricky Nelson
TCOM (Composer): Baker Knight

This screenshot shows the album info, after scanning:

So what is supposed to be the proper Album Artist field for compilations and why isn’t PMS using it?

TPE2 = "Various Artists"

And that has to be identical in all files which are stored inside the artist folder titled “Various Artists”.

Okay, that seemed to help.

Another issue, however. I have Album Art set to Local Files Only, but PMS doesn’t seem to respect it and loads album art from Plex Music. Is there a way to fix it?

album art is a different option (no idea)

edit music library > advanced > scroll down to see other options

Yes, I have that option set to Local Files Only as I mentioned. Doesn’t seem to work.

How can you tell?
Are those pictures particularly blurry?

Because I have a completely different artwork embedded in the .mp3 files.

Look for artwork files in the folder. If the folder was ever “touched” by Windows Media Player, there might be (even unbeknownst to you) hidden album art in there.

Please also copy the content of the guid="... property from the Plex XML info of track 1 of that album
and paste it into here.

Here it is:

guid="plex://track/5d07ce3c403c64029001c0b3"

I would expect it to use this artwork (which I also have embedded into mp3 files), but it’s using this one for some reason.

As a test, take the correct cover art as a separate file.
Name it cover.jpg.
Put it into the folder of the album.
Refresh Metadata

What happens?

It does use cover.jpg for the thumbnail.

Is it possible that your files have several cover pictures embedded? And that Plex is picking the wrong one out of these?

Using the cover.jpg is a workaround though. It has the added advantage, that you can use the best quality file you can find (which would be unsuitable for embedding due to its size).

Possibly, I’ll check on that.

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