More > JRiver Media Center 29 for Windows
NEW: JRVR -- JRiver Video Renderer
jmone:
Any thoughts on SDR to HDR tonemapping?
park:
--- Quote from: park on December 04, 2021, 07:21:28 am ---I may be being silly, but i am playing some 4k hdr bluray rips (Justice league snyder cut, lord of the rings) with HDR passthrough turned on, and when I press CTRL+J the summary shows that the input is uhd and the output is 1920x1080. I have my display settings set to uhd@24hz for 24 fps video.
My signal path is:
Nvidia 3070 HDMI (desktop set to uhd, with 10bit output turned on in nvidia control panel) > Denon 2700 (passthrough mode) > Sony 9000f 4K HDR TV (set to cinema pro preset)
If I press "info" on my Denon it says that the input is UHD Bt.2020 and so is the output it is sending to the TV. The TV also reports its getting a HDR signal.
So is JRVR summary wrong possibly?
--- End quote ---
To cap this post, I fixed most of my issues by buying a new DP1.4>HDMI2 cable. I also changed the TV to being the main display and i was able to get good UHD@24hz bt.2020 output.
jmone did mention changing the output to 23fps but that didnt work in JRVR for me. When i set it to output UHD 23fps for 23.97 source material, MC would actually output at UHD@60hz.
Now I do notice that many of my movies have some pretty bad compression/macroblocking issues. I guess that madVR was smoothing a lot of that out for me before. I have turned on the "smooth compression artifacts" feature on my tv for now.
Manni:
Very excited to see this new renderer, madVR has stopped working reliably on my HTPC for me since I moved to the 3090 and as a result I've stopped using the HTPC as a source, given that sadly madshi doens't have the time to support madVR currently.
I have a suggestion though, as it would clearly take quite a bit of time before JRVR can catch up with some of the features that are needed when integrating into a home cinema (black bar detection, 3D LUTs calibration, sending BT2020 flag with nVidia, profiles, etc).
Would it be possible to get a "source direct" mode in JRVR that would send the least processed version of the content? Unlikely you can send 4:2:0 for all content at all frame rates due to drivers limitations, but could you try to send 4:2:2 and the native resolution, SDR or HDR passthrough, without any processing/upscaling?
That way those of us with an external video processor (Lumagen Radiance, madVR Envy) could use the HTPC as a source and do all the processing/calibration using the external VP?
The main difficulty you're going to hit re calibration is finding a way to get calibration software to support your own pattern generation (similar to madTPG). However, if you could use the same 3D LUT format (eecolor), that would definitely help as LUTs generated with madVR or Envy could be used with JRVR.
ppataki:
Just would like to inquire if anybody has any experience running JRVR 4K HDR passthrough using an AMD Ryzen 5 5600G or Ryzen 7 5700G? (with no additional GPU)
Would these processors be adequate enough to do that?
Many thanks
Hendrik:
--- Quote from: Manni on December 17, 2021, 07:03:16 am ---Would it be possible to get a "source direct" mode in JRVR that would send the least processed version of the content? Unlikely you can send 4:2:0 for all content at all frame rates due to drivers limitations, but could you try to send 4:2:2 and the native resolution, SDR or HDR passthrough, without any processing/upscaling?
--- End quote ---
PCs are not capable of that. Its all RGB all the time.
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