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Permission error using m4b encoder, possible docker uid/gid related #718

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opened 2026-04-24 23:18:03 +02:00 by adam · 1 comment
adam commented 2026-04-24 23:18:03 +02:00
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Originally created by @S-Mucalo on GitHub (Oct 26, 2022).

I am having a permissions error using the m4b encoder from the file management tools. I think the encoder is not using the AUDIOBOOKSHELF_UID/GID environment variables and causing errors trying to copy files from root user owned directories. The m4b encoder will copy the files into /metadata/cache/items/ as root. If the audiobookshelf user is not root, errors will occur after the encoding. No files will change in the original folder. I do not know if the error occurs without setting environment variables.

Audiobookshelf is installed with docker-compose:

  audiobookshelf:
    image: ghcr.io/advplyr/audiobookshelf
    container_name: audiobookshelf
    environment:
      - AUDIOBOOKSHELF_UID=1000
      - AUDIOBOOKSHELF_GID=1000
    ports:
      - 13378:80
    volumes:
      - /mnt/media/Books/Audiobook:/audiobooks
      - /docker/audiobookshelf/config:/config
      - /docker/audiobookshelf/metadata:/metadata
    restart: unless-stopped

permissions of the folders within the docker container seem ok to me:

/audiobooks $ ls -al
total 1453
drwxr-xr-x  109 node     node           109 Oct 26 10:53 .
drwxr-xr-x    1 root     root          4096 Oct 26 09:30 ..


/config $ ls -al
total 26
drwxr-xr-x   11 root     root            11 Jul  3 14:05 .
drwxr-xr-x    1 node     node          4096 Oct 26 09:30 ..
drwxr-xr-x    4 node     node             5 Apr 25  2022 authors
drwxr-xr-x    4 node     node             5 Apr 25  2022 collections
drwxr-xr-x    4 node     node             5 Jul  3 14:05 feeds
drwxr-xr-x    4 node     node             5 Apr 25  2022 libraries
drwxr-xr-x    4 node     node             5 Apr 25  2022 libraryItems
drwxr-xr-x    4 node     node             5 Apr 25  2022 series
drwxr-xr-x    4 node     node             5 Apr 25  2022 sessions
drwxr-xr-x    4 node     node             5 Apr 25  2022 settings
drwxr-xr-x    4 node     node             5 Apr 25  2022 users

/metadata $ ls -al
total 76
drwxr-xr-x    9 node     node             9 Apr 27 04:27 .
drwxr-xr-x    1 root     root          4096 Oct 26 09:30 ..
drwxr-xr-x    2 node     node            28 Apr 28 01:19 authors
drwxr-xr-x    2 node     node             2 Apr 25  2022 backups
drwxr-xr-x    5 node     node             5 Oct  6 06:07 cache
drwxr-xr-x    2 node     node             2 Apr 27 12:10 downloads
drwxr-xr-x  312 node     node           312 Oct 26 11:23 items
drwxr-xr-x    4 node     node             4 Apr 25  2022 logs
drwxr-xr-x    2 node     node             2 Apr 25  2022 streams

However, the metadata/cache/items where the m4b encoder does its thing has items created by root :

/metadata/cache/items $ ls -al
total 88
drwxr-xr-x    4 node     node             4 Oct 26 11:03 .
drwxr-xr-x    5 node     node             5 Oct  6 06:07 ..
drwxr-xr-x    2 root     root            28 Oct 26 10:16 li_2a870gfnm628b9rwrq
drwxr-xr-x    2 root     root            20 Oct 26 11:22 li_gmschfr9qarnrrojjw

The partial log file:

2022-10-26 11:03:47

INFO

Start m4b encode for li_gmschfr9qarnrrojjw - TaskId: encode-m4b_oclowq53r0h7cineho

2022-10-26 11:03:47

INFO

[DownloadWorker] FFMPEG concat started with command: ffmpeg -safe 0 -f concat -i /metadata/cache/items/li_gmschfr9qarnrrojjw/files.txt -y -loglevel error -map 0:a -acodec aac -ac 2 -b:a 64k -f mp4 /metadata/cache/items/li_gmschfr9qarnrrojjw/Isaac Asimov-Robot-I, Robot.m4b

2022-10-26 11:22:57

INFO

[DownloadWorker] worker ended

2022-10-26 11:22:59

ERROR

[AbMergeManager] Failed to move track "/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/01 I, Robot 01.mp3" to "/metadata/cache/items/li_gmschfr9qarnrrojjw/01 I, Robot 01.mp3" Error: EACCES: permission denied, unlink '/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/01 I, Robot 01.mp3'

2022-10-26 11:22:59

ERROR

[AbMergeManager] Failed to move track "/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/02 Robbie.mp3" to "/metadata/cache/items/li_gmschfr9qarnrrojjw/02 Robbie.mp3" Error: EACCES: permission denied, unlink '/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/02 Robbie.mp3'

...

Apologies if I have misinterpreted the errors.

Originally created by @S-Mucalo on GitHub (Oct 26, 2022). I am having a permissions error using the m4b encoder from the file management tools. I think the encoder is not using the AUDIOBOOKSHELF_UID/GID environment variables and causing errors trying to copy files from root user owned directories. The m4b encoder will copy the files into /metadata/cache/items/ as root. If the audiobookshelf user is not root, errors will occur after the encoding. No files will change in the original folder. I do not know if the error occurs without setting environment variables. Audiobookshelf is installed with docker-compose: ``` audiobookshelf: image: ghcr.io/advplyr/audiobookshelf container_name: audiobookshelf environment: - AUDIOBOOKSHELF_UID=1000 - AUDIOBOOKSHELF_GID=1000 ports: - 13378:80 volumes: - /mnt/media/Books/Audiobook:/audiobooks - /docker/audiobookshelf/config:/config - /docker/audiobookshelf/metadata:/metadata restart: unless-stopped ``` permissions of the folders within the docker container seem ok to me: ``` /audiobooks $ ls -al total 1453 drwxr-xr-x 109 node node 109 Oct 26 10:53 . drwxr-xr-x 1 root root 4096 Oct 26 09:30 .. ``` ``` /config $ ls -al total 26 drwxr-xr-x 11 root root 11 Jul 3 14:05 . drwxr-xr-x 1 node node 4096 Oct 26 09:30 .. drwxr-xr-x 4 node node 5 Apr 25 2022 authors drwxr-xr-x 4 node node 5 Apr 25 2022 collections drwxr-xr-x 4 node node 5 Jul 3 14:05 feeds drwxr-xr-x 4 node node 5 Apr 25 2022 libraries drwxr-xr-x 4 node node 5 Apr 25 2022 libraryItems drwxr-xr-x 4 node node 5 Apr 25 2022 series drwxr-xr-x 4 node node 5 Apr 25 2022 sessions drwxr-xr-x 4 node node 5 Apr 25 2022 settings drwxr-xr-x 4 node node 5 Apr 25 2022 users ``` ``` /metadata $ ls -al total 76 drwxr-xr-x 9 node node 9 Apr 27 04:27 . drwxr-xr-x 1 root root 4096 Oct 26 09:30 .. drwxr-xr-x 2 node node 28 Apr 28 01:19 authors drwxr-xr-x 2 node node 2 Apr 25 2022 backups drwxr-xr-x 5 node node 5 Oct 6 06:07 cache drwxr-xr-x 2 node node 2 Apr 27 12:10 downloads drwxr-xr-x 312 node node 312 Oct 26 11:23 items drwxr-xr-x 4 node node 4 Apr 25 2022 logs drwxr-xr-x 2 node node 2 Apr 25 2022 streams ``` However, the metadata/cache/items where the m4b encoder does its thing has items created by root : ``` /metadata/cache/items $ ls -al total 88 drwxr-xr-x 4 node node 4 Oct 26 11:03 . drwxr-xr-x 5 node node 5 Oct 6 06:07 .. drwxr-xr-x 2 root root 28 Oct 26 10:16 li_2a870gfnm628b9rwrq drwxr-xr-x 2 root root 20 Oct 26 11:22 li_gmschfr9qarnrrojjw ``` The partial log file: ``` 2022-10-26 11:03:47 INFO Start m4b encode for li_gmschfr9qarnrrojjw - TaskId: encode-m4b_oclowq53r0h7cineho 2022-10-26 11:03:47 INFO [DownloadWorker] FFMPEG concat started with command: ffmpeg -safe 0 -f concat -i /metadata/cache/items/li_gmschfr9qarnrrojjw/files.txt -y -loglevel error -map 0:a -acodec aac -ac 2 -b:a 64k -f mp4 /metadata/cache/items/li_gmschfr9qarnrrojjw/Isaac Asimov-Robot-I, Robot.m4b 2022-10-26 11:22:57 INFO [DownloadWorker] worker ended 2022-10-26 11:22:59 ERROR [AbMergeManager] Failed to move track "/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/01 I, Robot 01.mp3" to "/metadata/cache/items/li_gmschfr9qarnrrojjw/01 I, Robot 01.mp3" Error: EACCES: permission denied, unlink '/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/01 I, Robot 01.mp3' 2022-10-26 11:22:59 ERROR [AbMergeManager] Failed to move track "/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/02 Robbie.mp3" to "/metadata/cache/items/li_gmschfr9qarnrrojjw/02 Robbie.mp3" Error: EACCES: permission denied, unlink '/audiobooks/Isaac Asimov/Isaac Asimov-Robots-#0,1-I Robot/Isaac Asimov-Robot-I, Robot/02 Robbie.mp3' ... ``` Apologies if I have misinterpreted the errors.
adam added the waitingunable to reproduce labels 2026-04-24 23:18:03 +02:00
adam closed this issue 2026-04-24 23:18:04 +02:00
adam commented 2026-04-24 23:18:05 +02:00
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@advplyr commented on GitHub (Oct 26, 2022):

It looks like the error is happening when removing the file from your /audiobooks folder. Does abs have the permissions to move that file?

The item cache folder gets the permissions and owner changed after all the files are moved around.

@advplyr commented on GitHub (Oct 26, 2022): It looks like the error is happening when removing the file from your `/audiobooks` folder. Does abs have the permissions to move that file? The item cache folder gets the permissions and owner changed after all the files are moved around.
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Reference: starred/audiobookshelf#718
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