More > JRiver Media Center 31 for Windows
JRVR Video Renderer
JimH:
There's a thread here you could read. Start at least half way through. It got lots better near the end.
https://yabb.jriver.com/interact/index.php/topic,136378.0.html
Hendrik is our developer. haasn is the author of libplacebo.
There's also a black bar thread somewhere.
mattkhan:
I think you need Hendrik to answer as I don't believe any of this is documented anywhere. I asked various Q's in this in some threads so will try to summarise
--- Quote from: Manni on July 21, 2023, 04:16:58 am ---1) I use a DCI P3 with a 2.4 gamma as a baseline for my JVC NZ8. When using JRVR set to P3 / gamma 2.4, the gamut looks right but it looks like there is some black crush (confirmed with the S&M brightness pattern). What are the correct options to get proper DTM? This is without a 3D LUT first. [EDIT: I selected a 30000:1 custom contrast, which is the native contrast of the PJ with the current settings, laser dimming disabled].
--- End quote ---
Not sure what proper means but ime (JVC n7, dci p3, gamma 2.4) any black point adjustment produces an overly saturated image so I go with no such adjustment (the oled option in the contrast dialog) which dials it down. I suspect this may similarly ameliorate your black crush but not tested that myself.
--- Quote from: Manni on July 21, 2023, 04:16:58 am ---2) Re 3D LUT, I'm assuming we can use any 3D LUT created for madVR using Colorspace / Calman / DisplayCal, am I correct?
--- End quote ---
It accepts madvr format lut, it does produce the same output as madvr when configured currently with a displaycal lut (can't speak for the other apps but would guess they are ok too)
--- Quote from: Manni on July 21, 2023, 04:16:58 am ---If so, can we target gamma 2.4, or do we have to target gamma 2.2 for the LUT to be valid?
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I haven't seen it said that there is such a limitation. The 3dlut gamma (tone curve) option should be set to bt1886 though (for me it's not so intuitive but it's what is required to match madvr when using a displaycal generated lut and appears to be independent of any user controlled settings in displaycal)
One point of difference btw is that jrvr does not do anything to the video card gamma table so ensuring the contents of this is left to the user to handle
Manni:
Thank you both.
I'll wait for Hendrick's reply re black bar detection and picture shift.
I'll post in the other thread re the gamma and DTM issues.
Manni:
Happy to report that I've resolved my set up issues (it was a levels mismatch).
Any chance to get a reply from Hendrik re the vertical picture shift feature related to black bar detection?
1) will it work when JRiver is used as a player rather than a front end, provided the title is in the library and the black bars have been detected during import? I use JRiver with CMC
2) any ETA for this feature?
thanks!
Movieman:
--- Quote from: Manni on July 21, 2023, 04:16:58 am ---Just installed V31 and started playing with it.
First of all, congrats on the progress on JRVR, the DTM has much improved.
I have a few questions:
1) I use a DCI P3 with a 2.4 gamma as a baseline for my JVC NZ8. When using JRVR set to P3 / gamma 2.4, the gamut looks right but it looks like there is some black crush (confirmed with the S&M brightness pattern). What are the correct options to get proper DTM? This is without a 3D LUT first. [EDIT: I selected a 30000:1 custom contrast, which is the native contrast of the PJ with the current settings, laser dimming disabled].
2) Re 3D LUT, I'm assuming we can use any 3D LUT created for madVR using Colorspace / Calman / DisplayCal, am I correct? If so, can we target gamma 2.4, or do we have to target gamma 2.2 for the LUT to be valid?
3) Re vertical shift for black bar detection, it's great to see that you plan to add this feature. Two questions about this: 1) Any ETA for this to be implemented and 2) I understand that the black bar detection is done offline to save processing time, when adding the files to the library. I use JRiver as a player with CMC as a front end. Please can you make sure that the metadata will be used for the vertical shift even when using JRiver as a player, as long as the metadata is present in the library for that title? Vertical shift is a key feature on my 16/9 screen.
Thanks and keep up the good work! :)
Once I've resolved these set up questions, I'll do more testing and will report back.
--- End quote ---
I have found that BT.2020 gamma 2.2 seems to work best for me on my RS3100. No LUT in use. No clipping on white or black, verified with test patterns. All PJ settngs default.
P3 gave me a darker image and clipped blacks as well I could improve with brightness / contrast adjustments in the NVidia CP.
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