|  | 
| Transcoding not work - Printable Version +- Jellyfin Forum (https://forum.jellyfin.org) +-- Forum: Support (https://forum.jellyfin.org/f-support) +--- Forum: Troubleshooting (https://forum.jellyfin.org/f-troubleshooting) +--- Thread: Transcoding not work (/t-transcoding-not-work) | 
| Transcoding not work - gian2k - 2025-10-30 I'm running Jellyfin with the dock container on a DS225+ NAS with a hack script transcoding. Transcoding works well with other installation of Jellyfin from SynoCommunity, but not in Docker. Log transcoding: Device creation failed: -542398533. [vist#0:0/hevc @ 0x7f31d42ba200] [dec:hevc @ 0x7f31d429d500] No device available for decoder: device type vaapi needed for codec hevc. [vist#0:0/hevc @ 0x7f31d42ba200] [dec:hevc @ 0x7f31d429d500] Hardware device setup failed for decoder: Generic error in an external library Error opening output file /cache/transcodes/a8537e62eaa0d210bfc1afd970206085.m3u8. Error opening output files: Generic error in an external library Compose Yaml: services: jellyfin: image: jellyfin/jellyfin:latest container_name: Jellyfin environment: - PUID=10.. - PGID=1.. - IT=Europe/Rome #- JELLYFIN_PublishedServerUrl=192.168.1.# #note: change TZ to your timezone identifier: https://en.wikipedia.org/wiki/List_of_tz_database_time_zones volumes: - /volume1/docker/jellyfin/cache  cache:rw - /volume1/docker/jellyfin/config  config:rw - /volumeUSB1/usbshare1-2  usbshare1-2:rw - /volumeUSB2/usbshare2-2  usbshare2-2:rw #note: (:rw = read/write) & (:ro = read only) #devices: - /dev/dri/renderD128  dev/dri/renderD128 - /dev/dri/card0  dev/dri/card0 #note: uncomment these lines in devices to allow for HWA to work on Synology units with an iGPU ports: - 8096:8096/tcp #- <port-to-use>:8096/tcp network_mode: bridge #network_mode: host restart: unless-stopped |