Can you switch to using jellyfin-ffmpeg? It isn't just a relabel of ffmpeg. Nyanmisaka makes quite a few changes to it, backports fixes, bundles in drivers, etc.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)
In my prior post I had suggested you switch to jellyfin-ffmpeg instead of vanilla ffmpeg due to there being significant differences between the versions.
Jellyfin 10.10.3 (Docker)
Ubuntu 24.04 LTS
Intel i3 12100
Intel Arc A380
OS drive - SK Hynix P41 1TB
Storage
3x WD Red Pro 6TB CMR in RAIDZ1 (JF Library)