I have written a little webhook server to help with getting better performance if you are using rclone cache mounts and emby
This will create a small webserver to be put on the same machine as the rclone cache mount. when media is being played, it will tell rclone to cache the entire file to disk and help eliminate buffering.
This mimics the behavior that rclone cache has when setup to use Plex Pre-caching.
I've been testing it with my rather busy media server and it has made the experience a ton better.