SOLVED: Transcoding fails in docker image due to missing render group

[esmorun]

I found a permanent workaround by creating a systemd file that launches the container and automatically runs the command to fix the render group problem at startup:

/etc/systemd/system/jellyfin-pod.service

Code:

[Unit]
Description=Jellyfin container (persistent) via Podman
After=network-online.target
Wants=network-online.target

[Service]
Restart=always
RestartSec=5s
TimeoutStartSec=300
ExecStart=/usr/bin/podman start -a jellyfin
ExecStartPost=/usr/bin/podman exec -u 0 jellyfin groupadd -f -g 110 render
ExecStop=/usr/bin/podman stop -t 30 jellyfin
KillMode=process
Type=simple

[Install]
WantedBy=multi-user.target

sudo systemctl daemon-reload
sudo systemctl enable --now jellyfin-pod.service