Tags on flac not being indexed

[jurope]

I have around 1700 albums, mostly ripped CDs in flac format. I tag using id3v2 on debian. Around 200 are MP3 from podcasts and so.
All the MP3 are indexed correctly, but only a few of the flac make it. The rest appears in the [untagged].

Any suggestions?

MinimServer 2.0.18 on a trial license
running on
Synoilogy RS3617RPxs, 6.2.3

id3v2 of a track not indexed:

$ id3v2 -l 'Abba^Super Trouper/track02.flac'
id3v1 tag info for track02.flac:
Title : The Winner Takes It All Artist: Abba
Album : Super Trouper Year: 1980, Genre: Unknown (255)
Comment: Track: 2
id3v2 tag info for track02.flac:
TPE1 (Lead performer(s)/Soloist(s)): Abba
TALB (Album/Movie/Show title): Super Trouper
TYER (Year): 1980
TIT2 (Title/songname/content description): The Winner Takes It All
TRCK (Track number/Position in set): 2/13


looking at the mcache (cutting from od -A x -t x1z)

109770 72 20 54 72 6f 75 70 65 72 2f 74 72 61 63 6b 30 >r Trouper/track0<
109780 38 2e 66 6c 61 63 00 00 01 77 e5 9d 8d 53 00 00 >8.flac...w...S..<
109790 00 00 01 8b 28 80 00 00 ac 44 00 00 00 02 00 00 >....(....D......<
1097a0 00 10 00 15 88 80 00 00 00 00 00 8b 56 78 00 00 >............Vx..<
1097b0 ac 44 00 04 66 6c 61 63 00 00 00 00 00 00 00 00 >.D..flac........<
1097c0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >................<
1097d0 00 00 00 00 00 00 00 00 00 03 00 00 00 71 00 1f >.............q..<
1097e0 41 62 62 61 5e 53 75 70 65 72 20 54 72 6f 75 70 >Abba^Super Troup<
1097f0 65 72 2f 74 72 61 63 6b 30 32 2e 66 6c 61 63 00 >er/track02.flac.<
109800 00 01 77 e5 9d 8d 38 00 00 00 00 02 26 78 80 00 >..w...8.....&x..<
109810 00 ac 44 00 00 00 02 00 00 00 10 00 15 88 80 00 >..D.............<
109820 00 00 00 00 c6 4d 88 00 00 ac 44 00 04 66 6c 61 >.....M....D..fla<
109830 63 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >c...............<
109840 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >................<
109850 00 00 03 00 00 00 71 00 1f 41 62 62 61 5e 53 75 >......q..Abba^Su<
109860 70 65 72 20 54 72 6f 75 70 65 72 2f 74 72 61 63 >per Trouper/trac<

and of the first part of the flac (ID3v2):

000000 49 44 33 03 00 00 00 00 02 2a 54 50 45 31 00 00 >ID3......*TPE1..<
000010 00 05 00 00 00 41 62 62 61 54 41 4c 42 00 00 00 >.....AbbaTALB...<
000020 0e 00 00 00 53 75 70 65 72 20 54 72 6f 75 70 65 >....Super Troupe<
000030 72 54 59 45 52 00 00 00 05 00 00 00 31 39 38 30 >rTYER.......1980<
000040 54 49 54 32 00 00 00 18 00 00 00 54 68 65 20 57 >TIT2.......The W<
000050 69 6e 6e 65 72 20 54 61 6b 65 73 20 49 74 20 41 >inner Takes It A<
000060 6c 6c 54 52 43 4b 00 00 00 05 00 00 00 32 2f 31 >llTRCK.......2/1<
000070 33 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >3...............<
000080 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >................<
*
000130 00 00 00 00 66 4c 61 43 00 00 00 22 12 00 12 00 >....fLaC..."....<

[simbun]

The native tag format for FLAC is Vorbis Comments, so I assume that's why it's not reading the ID3 tags.

What tool have you been using to tag your files? I remember years ago a situation where EAC would add Vorbis and ID3 (if you ticked "Add ID3" in the external compression configuration), so it might be worth checking if a similar thing has happened.

The easiest way to check (if you have access to a Windows PC) would be to open an album (make a copy on one) up in Mp3tag and make sure the "Tag" column is showing in the UI, and if both tag formats are there it'll show (FLAC (FLAC ID3v2)).
If this is the case, you can then select all the tracks of the album, "Tag Cut" and then "Tag Paste" and it'll paste back only the Vorbis Comments.

If both formats are there, report back and we'll see if there's another way of addressing it.

EDIT: I've just looked again at your output listing, and I didn't realise that when you said "I tag using id3v2 on debian", that id3v2 was the program, in that case I assume you don't have both, and probably need to look at a way of converting to Vorbis, unless MinimServer can handle this somehow.

[simoncn]

MinimServer cannot convert tags and reads only Vorbis tags from FLAC files.