Playback Issues with Jellyfin Over VPN: Pixelation and Artifacts on Non-LAN Clients

[Skynet_o1]

Hello Community,

I'm experiencing a strange playback issue when accessing my Jellyfin server via VPN (WireGuard).

Scenario 1: Accessing the Jellyfin server from an Android smartphone via WireGuard. Playback works flawlessly over both LTE and external Wi-Fi networks. Transcoding also works without any issues.

Scenario 2: Accessing from all clients on the local LAN works perfectly. There are no playback issues, and the video quality is consistently stable.

Scenario 3: Accessing from other clients (Debian or Raspberry Pi with Kodi and Jellyfin addon) via WireGuard results in pixel artifacts. These artifacts are constant and appear in all videos, significantly degrading the viewing experience.

Additional Information:

• I have ruled out defective video files.
  
• The VPN connection provides a stable 50 Mbps download speed on the client side.
  
• The pixel errors occur regardless of whether the videos are transcoded or not.
  
• The Jellyfin server is running the latest version in a Proxmox LXC on a Debian base.
  
  

Does anyone have any idea what might be causing this or how I can fix it?

Thank you in advance!



4o