Just a quick question to try and identify where the issue is…
I’ve got an ‘okay’ plex server - the CPU passmark is around 6600, and i am playing Plex Media Player from the same machine - it runs 40-45mbps Blu Ray files perfectly with no hitches (on direct play)
I have a couple of 70-80mpbs 4k files that buffer constantly - the files Direct Play, so does that rule out the CPU as there is no transcoding? I’m using a wired ethernet connection so I don’t think it’s my network…
If PMS is reporting DirectPlay, you have a network / communications issue.
At that bit rate for video, don’t forget to add the extra bit rate of the audio and then the overhead of TCP & IP to it.
Most televisions have 100 Mbps ethernet connections.
At 80 Mbps, you’re transmitting 10 Mbps just for the video (without overhead).
As a test, set your laptop / desktop at 100 Mpbs LAN speed and download the same file .
See what throughput you get. This is the best approximation you can get of what the TV is actually receiving.
TCP/IP has effectively an 80/85% efficacy. You’re on the edge with 80 but well under it at 45-45.
As a personal note: Playing 60 Mbps 4K over wifi is no difficulty for my television.