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Old 8th February 2019, 15:51   #54621  |  Link
tp4tissue
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If you are testing with the latest builds and still find the image is too dark, trying changing the output gamma in madVR. Even those with a display calibrated to 2.20 can sometimes get a better result by setting madVR to 2.40.
why does setting to 2.4 make it brighter ?

My 2.4 luts are always darker

Also, is there a lut switcher of sorts in madvr that can cycle the luts in a folder ?
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Old 8th February 2019, 16:04   #54622  |  Link
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with HDR->SDR madVR trys to archive a gamma of 2.2 and at that gamma the brightness matches PQ brightness. so if you now set your display is calibrated to 2.4 it will lower the gamma so the image looks brighter and is effect gamma 2.2.

with a target 2.4 3D LUT it doesn't do that because it doesn't known the 3D LUT gamma so the image is darker in comparison and mathematically wrong.

this should not be confused with color and gamma setting which work different and again don't work properly with a 3D LUT.

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Also, is there a lut switcher of sorts in madvr that can cycle the luts in a folder ?
no but you can do that with profiles.
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Old 8th February 2019, 17:44   #54623  |  Link
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Good news: it looks like 418.81 fixes the levels issues that I had with the JVCs in 12bits. So now you can get the correct levels with NCP set to 4K23 12bits RGB Full and MadVR set to video levels (16-235) with the projector set to standard HDMI.

That means that there is officially no reason to stay with 385.28, at least here.

Using CRU, custom refresh survive a reboot (as long as 23p is your default rate, not 60p).

Great to have custom refresh rates, correct levels and optimized 3D with the same drivers, with Asio4all support as well.

Still not an option for those who need HDMI passthrough for HDR, as the metadata is still not correct sadly. But if you use pixer shader tonemapping as I do, 418.81 seem to work great.

I just hope that it will be the same with my new RS2000 (arriving next week) and that ideally the 8bits magenta bug will be gone on the new models. I'll report back when I've been able to test.
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Last edited by Manni; 8th February 2019 at 18:05.
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Old 8th February 2019, 17:57   #54624  |  Link
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Great thank you so much for your help, so a lower number than 175 will be brighter correct. If you make it too bright do you loose contrast or blacks?
I need to be clear on one point here. This is true if you are converting to SDR. if you are outputting to HDR then a higher target nit value would correspond to a brighter image. Yes, this can be somewhat confusing to wrap your head around in the beginning but it does make sense. Making it "too bright" definitely can cause unwanted issues, yes.
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Old 8th February 2019, 19:00   #54625  |  Link
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Originally Posted by Manni View Post
Good news: it looks like 418.81 fixes the levels issues that I had with the JVCs in 12bits. So now you can get the correct levels with NCP set to 4K23 12bits RGB Full and MadVR set to video levels (16-235) with the projector set to standard HDMI.

That means that there is officially no reason to stay with 385.28, at least here.

Using CRU, custom refresh survive a reboot (as long as 23p is your default rate, not 60p).

Great to have custom refresh rates, correct levels and optimized 3D with the same drivers, with Asio4all support as well.

Still not an option for those who need HDMI passthrough for HDR, as the metadata is still not correct sadly. But if you use pixer shader tonemapping as I do, 418.81 seem to work great.

I just hope that it will be the same with my new RS2000 (arriving next week) and that ideally the 8bits magenta bug will be gone on the new models. I'll report back when I've been able to test.
just a question OT, are you using asio because you do not passthrough audio ?
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Old 8th February 2019, 22:27   #54626  |  Link
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just a question OT, are you using asio because you do not passthrough audio ?
No, no, Asio4all is just for REW

I use HDMI bitstream for movie audio playback.
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Old 8th February 2019, 23:39   #54627  |  Link
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It's great to see nVidia is addressing issues for JVC PJ users using madVR. In the mean time, for three driver series dating back to last year, they still fail to engage HDR mode because they can't even passthrough. I installed 418.81 a few days ago. It failed as miserable as the previous dozen or so.
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Old 9th February 2019, 07:49   #54628  |  Link
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@Manni

Does other apps like HDR 3D games also send wrong metadata or it's only related to madVR?
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Old 9th February 2019, 13:55   #54629  |  Link
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It's great to see nVidia is addressing issues for JVC PJ users using madVR. In the mean time, for three driver series dating back to last year, they still fail to engage HDR mode because they can't even passthrough. I installed 418.81 a few days ago. It failed as miserable as the previous dozen or so.
It must be DVDFab alone because madVR seems fine: https://forum.doom9.org/showthread.php?t=176013
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Old 9th February 2019, 13:58   #54630  |  Link
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@Manni

Does other apps like HDR 3D games also send wrong metadata or it's only related to madVR?
No idea, I haven't tested and don't have any HDR games.
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Old 9th February 2019, 14:20   #54631  |  Link
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No, no, Asio4all is just for REW

I use HDMI bitstream for movie audio playback.
thank you for the answer, but.....what do you mean as REW ?
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Old 9th February 2019, 15:03   #54632  |  Link
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No idea, I haven't tested and don't have any HDR games.
If you would like to test it, Shadow of the Tomb Raider and Resident Evil 2 have free demos on steam that support HDR.
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Old 9th February 2019, 15:31   #54633  |  Link
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thank you for the answer, but.....what do you mean as REW ?
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If you would like to test it, Shadow of the Tomb Raider and Resident Evil 2 have free demos on steam that support HDR.
Thanks, I might if I find the time, but not a priority here. Also how am I supposed to know if the metadata is correct or not? At least with UHD Bluray we know what the correct metadata is, plus MadVR shows it in the OSD.

nVidia is sending metadata, it's just not the correct one. the only way to know is to know what should be sent in passthrough mode.
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Old 9th February 2019, 16:08   #54634  |  Link
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it's usually 4k with 10000 nit as pure white (will be clipped anyway so they didn'T bother.)

you will have sliders to control the meta data and you only need to look into the sun the max nit you setup.
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Old 9th February 2019, 16:11   #54635  |  Link
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Tomb Raider internally reaches max 1500 nits, while RE2 4000 nits, so those values should be somehow reflected in metadata. If you gonna get the same values as with madVR, than metadata is fake.

That said this is purely to satisfy mine and sat4all's curiosity, so don't bother with this if you have better things to do.
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Old 9th February 2019, 16:21   #54636  |  Link
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Originally Posted by KoKlusz View Post
Tomb Raider internally reaches max 1500 nits, while RE2 4000 nits, so those values should be somehow reflected in metadata. If you gonna get the same values as with madVR, than metadata is fake.

That said this is purely to satisfy mine and sat4all's curiosity, so don't bother with this if you have better things to do.
This is confusing.

The color graders don't have the right equipment.

We don't have the right equipment.

Neither parties have the right equipment to view the standard..
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Old 9th February 2019, 19:48   #54637  |  Link
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it'S a computer game and only light source like the sun have this brightness.
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Old 9th February 2019, 21:31   #54638  |  Link
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It is an expected behaviour for the GPU to reject every single optimized pixel clock up to clock number 32? A compatibility of 85 sounds a little bit more promising than that.

Am I doing something wrong or it is the display of my TV driving me nuts?
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Old 9th February 2019, 22:06   #54639  |  Link
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It is an expected behaviour for the GPU to reject every single optimized pixel clock up to clock number 32? A compatibility of 85 sounds a little bit more promising than that.

Am I doing something wrong or it is the display of my TV driving me nuts?
Not really, I never had any success with that side of madVR myself, so just always used older nVidia drivers that accepted custom resolutions. I always found the numbers that madVR was saying would work were of no use.

I think others have more success by inputing the numbers madVR gives into CRU, I never had much success with that, but lots of others did.
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Old 9th February 2019, 22:11   #54640  |  Link
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Can anyone recomend me good settings for madVR can't seem to find some good settings most of what I have found is for older versions and with some video stutters
I have gtx 980ti i7 5930k and watching on 1440p screen mostly 1080p content sometimes 4k if that helps
Thanks
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