Playback Issues on Certain Files

[John L]

I'm running the official Jellyfin image in Docker on a Ugreen NAS.  I get an error when playing select 4k Bluray Remuxes.  Attached is the ffmpeg log.  Does this have anything to do with the Dolby Vision version?  Any help would be appreciated.

[TheDreadPirate]

It is trying to transcode, but it looks like you did not passthrough the GPU into the Docker container. Can you share how you've configured the Jellyfin container?

And what model NAS do you have? The Ugreen NASes other users have posted about here all seem to have Intel Alderlake CPUs in them. If yours is the same, it should have very good transcoding and tone mapping capabilities.

[John L]

It is trying to transcode, but it looks like you did not passthrough the GPU into the Docker container.  Can you share how you've configured the Jellyfin container?

And what model NAS do you have?  The Ugreen NASes other users have posted about here all seem to have Intel Alderlake CPUs in them.  If yours is the same, it should have very good transcoding and tone mapping capabilities.

I have the 4800plus which does have the Alderlake.  I too thought the GPU wasn't being passed which is why I added the additional devices.  Attached is the container image

[TheDreadPirate]

Since are running the container as non-root user, you need to use the "group_add" field to pass in the render group ID.

Code:

group_add:
      - 993 # Intel render group
    devices:
      - /dev/dri:/dev/dri

Replace with the ID for render on your system.

Code:

getent group render | cut -d: -f3

https://jellyfin.org/docs/general/admini...ion/intel/

[John L]

Thank you for your help. Same issue as before. Here is how my yaml looks now:

services:
jellyfin:
image: jellyfin/jellyfin:latest
container_name: Jellyfin-HT
user: 1000:10
environment:
TZ: America/New_York
volumes:
- /volume1/docker/jellyfinht/configconfig:rw
- /volume1/docker/jellyfinht/cachecache:rw
- /volume1/docker/jellyfinht/logslogs:rw
- /volume1/Media/Moviesdata/movies
- /volume1/Media/Seriesdata/series
- /volume1/Media/Musicdata/music
ports:
- 8096:8096
- 8920:8920
- 7359:7359/udp
- 1900:1900/udp
group_add:
- 105
devices:
- /dev/dri/renderD128dev/dri/renderD128
- /dev/dri/card0dev/dri/card0
- /dev/dridev/dri
restart: on-failure:5
network_mode: host

[TheDreadPirate]

Ah. I went back to your log and noticed something I've recently seen other users make the mistake of doing.

In Dashboard > Playback > Transcoding > QSV Device, it looks like you put /dev/dri/renderD128 in that box.

The QSV device box accepts an index number, as in 0, 1, 2, etc. And only needs to be populated if you have more than one Intel GPU in your system, which you don't. Clear out that box, save, try again.

[John L]

Ah.  I went back to your log and noticed something I've recently seen other users make the mistake of doing.

In Dashboard > Playback > Transcoding > QSV Device, it looks like you put /dev/dri/renderD128 in that box.

The QSV device box accepts an index number, as in 0, 1, 2, etc.  And only needs to be populated if you have more than one Intel GPU in your system, which you don't.  Clear out that box, save, try again.

I made the deletion, but no change.  I just realized, on my dashboard, Jellyfin shows the movie playing on my TV, however it's just a black screen with no sound.  Attached are the specs of the movie I'm trying to play.  Really appreciate your help and all you do for everyone else!

[TheDreadPirate]

If this is an android TV device, DV 7.6 is known to fail to play due to how exoplayer/jellyfin handles Dolby Vision fall back for that profile. There are efforts to work around this, but nothing concrete and no ETA.

Your options are to use Kodi as the player, with the associated plugins on the server, or convert the video to HDR10.

https://forum.jellyfin.org/t-converting-...n-to-hdr10

[John L]

Thank you for your help. Not an ideal solution but I lower the bitrate to force transcoding and it works. Hopefully there is a fix soon.