Emby Kill Streams Plugin
This plugin offers a couple options to kill transcoding 4k streams, streams that have been paused for xx min (set in config), and a fun nag warning to tell users not to transcode if set.
Screen shots and dll on github.
https://github.com/bakes82/Emby_KillStreams
https://github.com/bakes82/Emby_KillStreams/releases