Hello all, I need help with videos constantly pausing and buffering when playing 4k HEVC HDR content. Direct play to my 4k Roku TV works perfect. The problem occurs when I am trying to play it on my 1080p non HDR monitor. I know I am transcoding from 4k to 1080p as well as tone mapping (I have a Plex pass) and that it is quite CPU intensive, however the problem is that Plex isn’t hitting my CPU hard enough. I have a Ryzen 3700x (8 cores, 16 threads) and I can see in task manager as well as other monitoring apps like HWinfo that the CPU isn’t being hit hard at all. The fans ramps up and then stops. If it was really being hit hard like during a Cinebench run, the CPU fans will ramp up and stay up. I even tried setting the transcoding buffer to 10 minutes, 600 seconds and after a few minutes, the video will pauses, transcoding begins again (i hear the fans ramp up), and a few minutes of buffer builds up again. Any tricks or settings I can use? Thanks
Server Version#: Latest running on Ryzen 3700x, 32 GB 3600 Mhz Ram, RTX 3070
Player Version#: Playing on web app through google chrome
If you are running your Plex server on Windows, turn off HDR tone mapping and wait for a software update that offloads the HDR tone mapping to the GPU. I have spent hours troubleshooting and that is my conclusion, even if you have a powerful CPU that should be able to deal with the mapping part, it doesn’t work well.
There is a dedicated Plex app for Windows. Use that. It’s in the downloads section. It looks like Plex Web but has a different video player so it is much better.
