I tried it on my 918+ and it didn’t work. It just kept buffering
I have an Nvidia P400 doing hardware transcoding with the latest 1.21.0.3616 for Debian. These are my results testing Avenger’s Infinity War. Looks like it’s working well enough right now. I’ll have to watch the whole movie to judge further.
Without tone mapping on a older version on Plex
With newest version doing tonemapping
Adding Direct Play source for comparison
HW Transcoding proof
Yeah my Sandybridge isn’t too happy either xD Probably will upgrade to a ryzen later this year. My e5-2680 (v1) is showing it’s age. On the other hand, this is the only scenario that it actually uses more than 10%CPU. Maybe i will just wait a little longer until hardware transcode is working. That way i can spend the money on hard drives.
If you can go the GPU route, it can be cheaper and usually high quality with Nvidia products.
@mayer-server @Ammageddon Yep, that’s my plan too. Wait for hardware transcoding to be supported for nVidia on Windows and then pick up a new Quadro RTX. 
I still don’t understand why nVidia isn’t supported now on Windows, but probably ok to give it some time for RTX shortages to go away.
Yepp. Depends on how long it will take for the Windows support to arrive. I am using a 1050 at the moment for transcoding, which works good. On the other hand it would be nice to have a new Ryzen, they use half the power for double the performance 
Not to pick you, but this is not how it’s supposed to look, this is just a better approximation of how its supposed to look.
How it is supposed to look, is when it is direct played in the proper HDR mode.
AFAIK, most 4k uhd comes with a 1080 sdr bluray, but to your point, I think some players can down scale hdr to sdr, but I would assume it depends on the video hardware it has.
google results seem to indicate most cases you get the same washed out colors.
Well yeah, but you know what i meant
Really glad this was finally implemented thanks plex team. Now just need to support transcoding to h.265/HEVC and I will be happy lol
1 Like
Agreed! Super happy to finally see this feature! Thanks plex!
Now if only proper high res flac audio worked without down sampling to 44khz…
Then plex would finally be a complete solution in my eyes… And no, I don’t care about tv features… Please stop prioritizing those features and fixes in all of the new releases. Instead focus on your core featureset that your users want (movies, music, 4k, transcoding, dolby vision)
Adding another +1 for Windows hardware acceleration report. Updated to the latest version on Plex and started getting complaints of buffering. About 30 minutes of troubleshooting later, saw the HDR tonemapping option in transcoding (on by default) which is causing my Windows server to have issues even with my 3600x CPU (showing low utilization, but transcode rates are poor). Switched it off and appear to be back to normal with my Quadro P2000 doing most of the heavy lifting again. Would love an ETA for Windows nVidia hardware support, or at least would have liked that this was not enabled by default.
5 Likes
A have a shield but my TV is not HDR compatible. Is there a way for me to tell plex to tonemap everything that plays on my shield?
I’ve looked at the options for Plex on the shield but could not find any.
I have this exact problem with PMS on Debian Linux. Any workaround/solution?
Agreed. Can anyone at Plex provide an ETA on nVidia support (on Windows) for HDR tonemapping? Seems really odd that it isn’t already included.
1 Like
Do you mean:
Resolution: 4K 59.940 (default)
Advanced settings:
Match content colour space: Off (I didn’t understand this so I tried “On” but there was no difference.
Dynamic range: Is greyed out, not able to choose anything.
Custom display mode:
Set to default: On (3840x2160 59.940 Hz YUV 420 8-bit rec. 709)
If you mean anything else please let me know.
This is honestly a pretty big issue. Plex’s diagnostic tools for HW transcoding are severely lacking to begin with and there is absolutely nothing about this online for the most part. Spent a couple hours pouring over posts until I noticed that HDR toning was checked with the warning that it might cause problems, unchecked it and now my GPU is being used for HW transcoding.
Before, everything looked to be working fine (Plex showed hw transcoding, etc) but there was no GPU utilization at all.
Needs to default to unchecked until better support is added.
2 Likes
Also wondering when HDR tone mapping will come to windows. Any ETA?
2 Likes
Plenty of (Plexpass, read “paying”) users use LiveTV/DVR. Just because you don’t doesn’t mean its not important, and its been a “core featureset” of plex for some years now.
Totally agree, whats someone’s junk is someone else’s treasure. 
