Thanks! I developed this primarily for plex & jellyfin after struggling with Tdarr myself. For people running plex/jellyfin in containers, it's as simple as mounting the client binary at the ffmpeg path (using docker -v) and adding the config somewhere accessible (also using docker -v? lots of options here).
Does this work well with Plex and if so, what binary are you replacing? Last I looked they used a customised fork of ffmpeg which meant replacing it was more awkward. It would be a nice way to avoid passing a GPU through to a virtual machine.