jellyfin media player cannot play any video

[Rikka Takarada]

After upgrading to Jellyfin Media Player v1.11.1, I couldn't play any videos. Only the background poster of the video would appear. My server version is 10.10.1. I tried deleting the two Jellyfin Media Player folders in C:\Users\AppData\Local and also removed all devices from the web Dashboard, but nothing worked. Eventually, I had to revert back to Jellyfin Media Player v1.9.1 to get playback working again.

This is the exact same issue I got with Jellyfin v1.11.1 player on two different Windows PC... one running Win11 and the other on Win10.  After finding this thread, I reinstalled v1.9.1 and playback is working again.  

My files are stored on a Synology DS418 NAS running the latest Jellyfin in Docker.   It doesn't seem to be the server software as the videos will play in a browser, or on my Roku TV, or on my iPad.  

I don't know if my log files could be any help to you...  But I could dig them up if need be?

My Jellyfin is installed on a QNAP NAS using Docker. I'm using MediaPlayer version 1.9.1 or 1.10.1 without any issues, but I think the hardware decoding problem is on the PC MediaPlayer side. I'll wait and see if the next version fixes it.