Directplay not working but transcoding no issues

[EFCAugure]

Hello again, of course.
I'm not familiar with pastebin but here is what i found in the logs :

https://pastebin.com/i3GR77K1

  Jellyfin-FFMPEG logs.txt (Size: 17.11 KB / Downloads: 27)


I am running Jellyfin 10.9 2024042215 with Debian Buster under a Proxmox 8 VM.

It is often oldest movies that have no sound now. I didn't notice the same thing before 10.9

Thanks for your help!
Lionel