feat(jellyfin): Add hardware-accelerated video decoding support for Jellyfin

[Knufle]

… server by mapping required GPU device nodes (/dev/dri, /dev/vcsm, /dev/vchiq, and /dev/video*) in the Docker Compose configuration.

Context:

The current Docker Compose configuration for the Jellyfin server does not include hardware-accelerated video decoding capabilities. This feature is essential for improving media playback performance, especially for high-definition video streams, by leveraging GPU-based transcoding.

Proposed Changes:

Modify the docker-compose.yml to include the following device mappings:

• /dev/dri: Enables Direct Rendering Infrastructure (DRI) for GPU access.
• /dev/vcsm and /dev/vchiq: Facilitates GPU memory and communication, particularly for Raspberry Pi systems.
• /dev/video10, /dev/video11, /dev/video12: Grants access to video device nodes for hardware-based video encoding/decoding.

Benefits:

• Enables hardware-based transcoding for Jellyfin, reducing CPU usage.
• Enhances performance during media playback, particularly for high-definition and 4K content.
• Provides compatibility with GPUs and Raspberry Pi-specific hardware.

Steps to Validate:

1. Update the docker-compose.yml file with the proposed changes.
2. Deploy the updated Jellyfin container.
3. Run docker exec <container_name> ls -l /dev/ to verify the container has access to the mapped devices.
4. Check Jellyfin's playback settings and logs to confirm that hardware acceleration is enabled and functional.

Notes:

• Ensure the host system has the appropriate GPU drivers installed and configured.
• Additional Jellyfin configuration may be required to enable hardware acceleration in the application itself.

[github-actions]

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Linting Results

Severity	File	Description
ℹ️	jellyfin/docker-compose.yml	External port mapping "7359:7359/udp": Port mappings may be unnecessary for the app to function correctly. Docker's internal DNS resolves container names to IP addresses within the same network. External access to the web interface is handled by the app_proxy container. Port mappings are only needed if external access is required to a port not proxied by the app_proxy, or if an app needs to expose multiple ports for its functionality (e.g., DHCP, DNS, P2P, etc.).

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❌	Error: This must be resolved before this PR can be merged.
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ℹ️	Info: This is just for your information.