FYI
Due to a regression in our Jellyfin FFmpeg (https://github.com/jellyfin/jellyfin/issues/10654), we've pushed a new combined Docker image at version 10.8.13-1. All the server and web code is identical, it just has the updated jellyfin-ffmpeg package included. latest has been updated to match.
EDIT 2023-12-01
For anyone using the macOS .DMG (installer), we missed bundling ffprobe in the package.
A new build has been uploaded to our download page. Look for jellyfin_10.8.13-1.dmg.
FYI
Due to a regression in our Jellyfin FFmpeg (https://github.com/jellyfin/jellyfin/issues/10654), we've pushed a new combined Docker image at version 10.8.13-1. All the server and web code is identical, it just has the updated jellyfin-ffmpeg package included. latest has been updated to match.