Plex fails to use HW accell for H.265(HEVC)

[Sittingmongoose]

Server Version#: 1.15.1.710
Player Version#: 3.89.2 (Effects everyone of my various clients the same)
Plex Transcoder Statistics.1.log (15.4 KB)

Specs: Dual Xeons X5680/48GB Ram(16GB ram drive for transcodes)/Nvidia P2000/Windows 10 Pro/ Native Plex server app/Plex Pass member

So I will start this by saying I know you should transcode 4K HDR because you lose color data. I was just doing this to test HW transcoding!

The issue I am having only affects HEVC or converting H.265 to H.264. Plex trys to transcode the video but is incrediably slow. Tautulli shows its only converting at .5-.8. The other weird this is my usage goes down dramatically. CPU usage only goes to about 10% and GPU usage on decode is only 15%. When I transcode H.264, it works properly and my cpu and GPU usage is much higher. I tried messing with the different transcode settings but they don’t change much. I have also tried new drivers for my P2000 and doing a clean install of drivers. I have had this behavior for several months and the newest update that just came out didnt help(on beta).

Emby works perfectly though so I know its not a hardware issue. It can transcode 4-6 4K HEVC H.265 movies at once. I have posted a few times about this issue but haven’t had a single response

[manuwood]

Me too, I’ve got the same issues as you. Well, my setup is more humble than yours with an i5 4440/8gb ram/Quadro p2000/Windows 10 PRO, but it should be enough for more than a couple of transcodes. What’s up plex with HEVC h265?

[Sittingmongoose]

I made a video to explain the issue.

[Sittingmongoose]

I did some more digging and it appears to be tied to 10 bit. I beleive because they dont have support up for 10 bit HDR, it is failing to turn on NVEDC. So then it just errors out and flounders. You can test this by watch a movie that is 4k h265 but no 10bit HDR(its hard to find).