I started using x265 encoding after adopting plex. I use an external encoder MCEBuddy which drives the ffmpeg command line and has great results. It does require Windows unfortunately but I just switched to a new Synology NAS and I’m experimenting with scripted ffmpeg options to externally encode the files before handing them over to Plex. I’m pretty confident this can be streamlined as-is but I agree it is long past time Plex should support the new standard for 4k inside the product.
