はじめに

物理的なCDってそのうち劣化するらしいじゃんってことでCD Manipulatorでimg+cue形式にしてとりあえず取り込んでいるわけですが、せっかく読み込み終わったこのデータをCLIでflacに変換できないものかと思って調べました
色々寄り道したのにシンプルなコマンドになってしまった・・・(初手ChatGPTで失敗した)

環境

OS
- Ubuntu 24.04
  - ツール導入楽ちん、dockerやLinux Containerでもできそう
導入するパッケージ
- flac
- abcde

手順

# cueタグが埋め込まれた単一flacファイルに変換する
$ flac -f --best --force-raw-format --endian=little --channels=2 --bps=16 --sample-rate=44100 --sign=signed --cuesheet='hogehoge.cue' 'hogehoge.img'

# cueタグが埋め込まれた単一flacファイルを各楽曲のflacファイルに分割して楽曲情報を埋め込む
# --> `-N`以降はChatGPTに出してもらったオプションで未精査、そのうちアップデートするつもり
$ abcde -d 'hogehoge.flac' -N -o flac -x -a default,cddb,read,encode,tag

できたら指定したいオプション
- 分割済みflacの出力先dir指定したい
- ファイル名に曲名入れたくない
- CDのデータベースなんとかならんか

実行例(成功)

$ flac -f --best --force-raw-format --endian=little --channels=2 --bps=16 --sample-rate=44100 --sign=signed --cuesheet='20161123 - ningen kaika.cue' '20161123 - ningen kaika.img'

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

20161123 - ningen kaika.img: wrote 476686052 bytes, ratio=0.632
$ abcde -d '20161123 - ningen kaika.flac' -N -o flac -x -a default,cddb,read,encode,tag
Grabbing entire CD - tracks:  01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
Retrieved 1 match...
#1 (Musicbrainz): ---- RADWIMPS / 人間開花 ----
1: Lights go out
2: 光
3: AADAAKOODAA
4: トアルハルノヒ
5: 前前前世 [original ver.]
6: 'I' Novel
7: アメノヒニキク
8: 週刊少年ジャンプ
9: 棒人間
10: 記号として
11: ヒトボシ
12: スパークル [original ver.]
13: Bring me the morning
14: O&O
15: 告白

Selected: #1 (RADWIMPS / 人間開花)
Edit selected CDDB data [y/N]?
Is the CD multi-artist [y/N]? n
Grabbing track 01: Lights go out...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

20161123 - ningen kaika.flac: done
Grabbing track 02: 光...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

20161123 - ningen kaika.flac: done

(中略)

Grabbing track 15: 告白...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

20161123 - ningen kaika.flac: done
Encoding track 06 of 15: 'I' Novel...
Tagging track 06 of 15: 'I' Novel...
Encoding track 07 of 15: アメノヒニキク...
Tagging track 07 of 15: アメノヒニキク...
Encoding track 08 of 15: 週刊少年ジャンプ...
Tagging track 08 of 15: 週刊少年ジャンプ...
Encoding track 09 of 15: 棒人間...
Tagging track 09 of 15: 棒人間...
Encoding track 10 of 15: 記号として...
Tagging track 10 of 15: 記号として...
Encoding track 11 of 15: ヒトボシ...
Tagging track 11 of 15: ヒトボシ...
Encoding track 12 of 15: スパークル [original ver.]...
Tagging track 12 of 15: スパークル [original ver.]...
Encoding track 13 of 15: Bring me the morning...
Tagging track 13 of 15: Bring me the morning...
Encoding track 14 of 15: O&O...
Tagging track 14 of 15: O&O...
Encoding track 15 of 15: 告白...
Tagging track 15 of 15: 告白...
Finished.

$ metaflac --show-all-tags RADWIMPS-人間開花/01.Lights_go_out.flac
ARTIST=RADWIMPS
ALBUM=人間開花
TITLE=Lights go out
DATE=2016
TRACKNUMBER=01
TRACKTOTAL=15
CDDB=cc10b60f

実行例(失敗)

あまり新しいとうまくいかないっぽい

$ flac -f --best --force-raw-format --endian=little --channels=2 --bps=16 --sample-rate=44100 --sign=signed --cuesheet=fukuyama_akira.cue fukuyama_akira.img

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.img: wrote 524111875 bytes, ratio=0.706
$ abcde -d fukuyama_akira.flac -N -o flac -x -a default,cddb,read,encode,tag
Grabbing entire CD - tracks:  01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17
MusicBrainz lookup returned an error "Not Found"
No lookup matches.
---- Unknown Artist / Unknown Album ----
1: Track 1
2: Track 2
3: Track 3
4: Track 4
5: Track 5
6: Track 6
7: Track 7
8: Track 8
9: Track 9
10: Track 10
11: Track 11
12: Track 12
13: Track 13
14: Track 14
15: Track 15
16: Track 16
17: Track 17

Selected: #0 (Unknown Artist / Unknown Album)
Edit selected CDDB data [y/N]?
Is the CD multi-artist [y/N]? n
Grabbing track 01: Track 1...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.flac: done
Grabbing track 02: Track 2...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.flac: done
Grabbing track 03: Track 3...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.flac: done

(中略)

Grabbing track 16: Track 16...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.flac: done
Grabbing track 17: Track 17...

flac 1.4.3
Copyright (C) 2000-2009  Josh Coalson, 2011-2023  Xiph.Org Foundation
flac comes with ABSOLUTELY NO WARRANTY.  This is free software, and you are
welcome to redistribute it under certain conditions.  Type `flac' for details.

fukuyama_akira.flac: done
Tagging track 06 of 17: Track 6...
Encoding track 07 of 17: Track 7...
Tagging track 07 of 17: Track 7...
Encoding track 08 of 17: Track 8...
Tagging track 08 of 17: Track 8...
Encoding track 09 of 17: Track 9...
Tagging track 09 of 17: Track 9...
Encoding track 10 of 17: Track 10...
Tagging track 10 of 17: Track 10...
Encoding track 11 of 17: Track 11...
Tagging track 11 of 17: Track 11...
Encoding track 12 of 17: Track 12...
Tagging track 12 of 17: Track 12...
Encoding track 13 of 17: Track 13...
Tagging track 13 of 17: Track 13...
Encoding track 14 of 17: Track 14...
Tagging track 14 of 17: Track 14...
Encoding track 15 of 17: Track 15...
Tagging track 15 of 17: Track 15...
Encoding track 16 of 17: Track 16...
Tagging track 16 of 17: Track 16...
Encoding track 17 of 17: Track 17...
Tagging track 17 of 17: Track 17...
Finished.

参考

音楽CDイメージをbin/img/wav+cueからflac+cue形式に直接移行する