Emby issue on accessing mount points

Apps and Virtualization
1

Hi,

I’m migrating my emby setup from a TrueNAS core installation to the TrueNAS scale.

My current version is 25.04.2.4

It was quite hard but in the end, I’m running the docker container with emby successfully.

The only issue is with video play, because when I start it’s not able.

I did some test & try but the main issue seems to be with mount points.

I added the storage and tried different mount points.

Host Path: /mnt/SCALE-POOL-01/multimedia/films
Mount Path: /mnt/films

I can see the files and explore them with

docker exec -it ix-emby-emby-1 ls -la /mnt/
total 34
drwxr-xr-x 4 root root 4 Jan 13 19:19 .
drwxr-xr-x 1 root root 7 Jan 13 19:19 ..
drwxrwx–x 267 2999 3002 268 Aug 30 17:32 films
drwxrwx–x 23 2999 3002 23 Aug 31 10:22 mntserietv

but in the logs there are errors like

2026-01-13 19:25:24.395 Error DynamicHlsService-0HNIIQ187DU80:0000001C: Error processing request*** Error Report ***Version: 4.9.4.1Command line: /system/EmbyServer.dll -programdata /config -ffdetect /bin/ffdetect -ffmpeg /bin/ffmpeg -ffprobe /bin/ffprobe -restartexitcode 3Operating system: Linux version 6.12.15-production+truenas (root@tnsbuilds01.tn.ixsystems.net) (gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1OS/Process: x64/x64Framework: .NET 8.0.22Runtime: system/System.Private.CoreLib.dllProcessor count: 2Data path: /configApplication path: /systemEmby.Server.MediaEncoding.Unified.Ffmpeg.FfRunException: Emby.Server.MediaEncoding.Unified.Ffmpeg.FfRunException: Error starting ffmpeg-loglevel +timing -y -print_graphs_file “/config/logs/ffmpeg-transcode-577fc0e9-b30d-46aa-8b23-b95b84b0e39f_1graph.txt” -copyts -start_at_zero -f matroska,webm -c:v:0 h264 -noautorotate -i “/mnt/FILM - 2012/FILM.mkv” -map 0:0 -map 0:1 -sn -c:v:0 libx264 -g:v:0 72 -maxrate:v:0 6616000 -bufsize:v:0 13232000 -sc_threshold:v:0 0 -keyint_min:v:0 72 -r:v:0 23.976024627685547 -pix_fmt:v:0 yuv420p -preset:v:0 veryfast -profile:v:0 high -x264opts:v:0 “subme=0:me_range=4:rc_lookahead=10:partitions=none” -crf:v:0 23 -c:a:0 libmp3lame -ab:a:0 192000 -ac:a:0 2 -metadata:s:a:0 language=ita -filter:a:0 “volume=2” -disposition:a:0 default -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -map_chapters -1 -segment_format mpegts -segment_list “/config/transcoding-temp/EB1695/EB1695.m3u8” -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -individual_header_trailer 0 -write_header_trailer 0 -segment_write_temp 1 “/config/transcoding-temp/EB1695/EB1695_%d.ts” -map 0:4 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list “/config/transcoding-temp/EB1695/EB1695_s4.m3u8” -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 “/config/transcoding-temp/EB1695/EB1695_s4_%d.vtt” -map 0:5 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list “/config/transcoding-temp/EB1695/EB1695_s5.m3u8” -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 “/config/transcoding-temp/EB1695/EB1695_s5_%d.vtt” -map 0:6 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list “/config/transcoding-temp/EB1695/EB1695_s6.m3u8” -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 “/config/transcoding-temp/EB1695/EB1695_s6_%d.vtt” -map 0:7 -map 0:0 -an -c:v:0 copy -c:s:0 webvtt -max_delay 5000000 -avoid_negative_ts disabled -f segment -map_metadata -1 -segment_format webvtt -segment_list “/config/transcoding-temp/EB1695/EB1695_s7.m3u8” -segment_list_type m3u8 -segment_time 00:00:03.000 -segment_start_number 0 -break_non_keyframes 1 -individual_header_trailer 1 -write_header_trailer 0 -write_empty_segments 1 -segment_write_temp 1 -min_frame_time 00:00:00.000 “/config/transcoding-temp/EB1695/EB1695_s7_%d.vtt”

19:25:24.348 ffmpeg version 5.1-emby_2023_06_25_p4 Copyright (c) 2000-2022 the FFmpeg developers and softworkz for Emby LLC
19:25:24.348   built with gcc 10.3.0 (crosstool-NG 1.25.0)
19:25:24.348 Execution Date: 2026-01-13 19:25:24
19:25:24.353 /mnt/FILM - 2012/FILM (2012) - 1080p.mkv: No such file or directory
19:25:24.353 EXIT

Please help

2

Try removing spaces and special characters like parenthesis from your folder paths and files?

3

Thank you but the problem is not in the folder path and name of my library, it seems to be in the ACL or mountpoints or both..

One question:

on trueNAS core it was required to create a User “emby” with UID 989 to make it working.

On trueNAS scale what I have to do? Now the user seems to have UID 568

4

On Scale most apps run as one (or in case they use a db sidecontainer 2 or 3) of these users:
UID 568 username “apps”
UID 999 username “netdata” for postgress and i believe mariadb side-container
UID 0 username “root”

In the app catalogue there’s a “run as” context tile which lists the user the app runs as

image
image1603×601 148 KB

Edit:
Try adding root and apps to your acl lists

5

Thank you, I was right.

I had to configure and add the user “apps” with read rights to my datasets. With this change I can add the mount path to the library in Emby..
Now I must check if all the data remain the same or some other issue arise..