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Old 20th February 2019, 20:43   #54901  |  Link
el Filou
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Quote:
Originally Posted by Grimsdyke View Post
When I play a 4k-file that has no black bars and change something in MadVR like target nits, etc. I see an immediate effect !!
But on files with black bars nothing changes !!
If this not known yet could someone please alert madshi over at AVS
Yes, I can't find the exact post quickly but it's been reported to madshi by one of the testers that black bars were confusing the dynamic HDR algorithm. It should be fixed in the next release (or you can download the latest test build from the AVS thread, search for 'madVRhdrMeasure' starting from the last page).
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Old 20th February 2019, 21:19   #54902  |  Link
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Originally Posted by alexnt View Post
No no I m ok now. That was a video proof that there was an issue and now problem is solved. It was a reg key that was left even I uninstalled madvr.
Could you post location of reg key
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Old 20th February 2019, 21:25   #54903  |  Link
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Originally Posted by tp4tissue View Post
Could you post location of reg key
HKEY_CURRENT_USER\Software\madshi\madVR
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Old 20th February 2019, 21:25   #54904  |  Link
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Originally Posted by el Filou View Post
Yes, I can't find the exact post quickly but it's been reported to madshi by one of the testers that black bars were confusing the dynamic HDR algorithm. It should be fixed in the next release (or you can download the latest test build from the AVS thread, search for 'madVRhdrMeasure' starting from the last page).
Does the size of the black bar change the quantity of confusion ?

For example, if it was a just a little bit of black bar in a near 16:9 movie, vs a 2:1 movie with big bars.
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Old 20th February 2019, 21:27   #54905  |  Link
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Originally Posted by madjock View Post
HKEY_CURRENT_USER\Software\madshi\madVR
Thxx
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Old 20th February 2019, 22:47   #54906  |  Link
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Quote:
Originally Posted by el Filou View Post
It should be fixed in the next release (or you can download the latest test build from the AVS thread, search for 'madVRhdrMeasure' starting from the last page).
Just tested the latest test build (54) and the problem is unfortunately still there !! So I would be very thankful if anyone could inform Madshi about that because watching John Carpenter's original HALLOWEEN is really not 'fun' right now.
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Old 20th February 2019, 23:13   #54907  |  Link
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Originally Posted by Grimsdyke View Post
Just tested the latest test build (54) and the problem is unfortunately still there !! So I would be very thankful if anyone could inform Madshi about that because watching John Carpenter's original HALLOWEEN is really not 'fun' right now.
What's happening, is it too dark or too bright ?

I just tried my copy of halloween 1978, changing the nit does make the screen brighter and darker.

I am using dxva2 copyback lav, on madv 92.17
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Old 20th February 2019, 23:53   #54908  |  Link
Alexkral
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Originally Posted by alexnt View Post
I uninstalled both mpc hc & be last night and madvr, too.
I also deleted madvr's folder, rebooted and then I run a registry cleaning. I also deleted mpc's folder left in program files.

I reinstalled mpc and downloaded another(older version 91.4) of madvr and extracted the folder in another drive(c: - had it on d: ).

When I started playing a movie and opened madvr settings I noticed that my settings where there(all of them, even the hd profiles in scaling) but madvr folder didn't have "settings.bin" when I extected it. As I understand it retrieves previous settings and maybe that is the problem. Is there in other location that madvr creates folders and profiles, so if I clean them will solve the problem.

I don't believe what is happening is normal. I said before that there is not such issue with my brothers rig with 4670k and 660ti.
Gpu does all the rendering and so cpu drops clocks.
I have a 4690k and r9 290 and I know(because I have seen it) that madvr did't behave with the same way in the past.
I'd say that means you have another madVR installation, maybe for another player like JRiver like me.
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Old 21st February 2019, 00:25   #54909  |  Link
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Quote:
Originally Posted by tp4tissue View Post
What's happening, is it too dark or too bright ?
I just tried my copy of halloween 1978, changing the nit does make the screen brighter and darker.
I am using dxva2 copyback lav, on madv 92.17
It's way too dark !! For example, the 'Rabbit in Red' matchbook at around 9:12 is almost completely in the dark.
Unfortunately I can't use 'copyback' because my gpu is not fast enough. So I hope that Madshi might fix this soon !! Thx
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Old 21st February 2019, 00:35   #54910  |  Link
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Originally Posted by Alexkral View Post
I'd say that means you have another madVR installation, maybe for another player like JRiver like me.
No, it is completely normal that Madvr stores its settings in the Registry. The settings.bin file is just a secondary storage method for the settings. See it as a backup.
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Old 21st February 2019, 01:08   #54911  |  Link
tp4tissue
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Originally Posted by Grimsdyke View Post
It's way too dark !! For example, the 'Rabbit in Red' matchbook at around 9:12 is almost completely in the dark.
Unfortunately I can't use 'copyback' because my gpu is not fast enough. So I hope that Madshi might fix this soon !! Thx
measure nits only work with Cpu decode, or Copyback dxva2 or dx11.

It does not work with native dxva or native dx11, because it can not measure the frame nits.

There's no way around this. if you want to use dynamic hdr + highlight recovery, you'll have to upgrade your GPU.

Which gpu do u have.
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Old 21st February 2019, 01:31   #54912  |  Link
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Measure nits work with native DXVA however black bar detection doesn't, so maybe the two features are interacting in a bad way.
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Old 21st February 2019, 09:53   #54913  |  Link
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Originally Posted by el Filou View Post
Measure nits work with native DXVA however black bar detection doesn't, so maybe the two features are interacting in a bad way.
Why does native dxva cause banding on RX580 though..
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Old 21st February 2019, 11:15   #54914  |  Link
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Originally Posted by tp4tissue View Post
Why does native dxva cause banding on RX580 though..
I have same issue on my Radeon Vega8. In addition DXVA(native) is more resource-intensive than CB.

Last edited by DMU; 21st February 2019 at 11:36.
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Old 21st February 2019, 11:21   #54915  |  Link
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Did anyone notice that 12bits on nVidia seems to distort patterns when using MadTPG as a pattern source (in 4K UHD SDR at 23p) compared to 8bits?
Could anyone with access to calibration software/equipment confirm this?
This is most visible when tracking gamut saturation and luminance linearity, but it also impacts greyscale. White balance isn't impacted significantly.
8bits is very linear and doesn't distort.
12bits breaks linearity and distorts the native gamut significantly.
It would be great if someone could confirm.
I don't use FSE, this is in full screen windowed mode.
If you don't experience this, please specify OS, nVidia driver version, and software used to calibrate/measure. Although unlikely, it could be caused by a specific setting in madVR, but I haven't had the time to investigate this yet. I have all the performance settings unchecked.
Details of rig in my sig (except driver, I was testing 385.28 for 12bits as I cant' get a custom refresh rate to work with CRU on the new JVC models).
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Last edited by Manni; 21st February 2019 at 11:50.
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Old 21st February 2019, 12:04   #54916  |  Link
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can you be a bit more precise so i can do the test quicker?
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Old 21st February 2019, 12:57   #54917  |  Link
Manni
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Originally Posted by huhn View Post
can you be a bit more precise so i can do the test quicker?
I can't be more precise. I can ask differently though

Using MadTPG as a source for patterns, in 4K23p SDR, full screen windowed, using the widest gamut your display can fully cover, preferably DCI-P3:

1) Measure gamut saturations (in 20% or 25% steps) with nVidia CP set to 8bits (after checking that levels are correct).
2) Measure gamut saturation (in 20% or 25% steps) with nVidia CP set to 12bits (after checking that levels are still correct, they might need to be changed when switching between 8bits and 12bits).

Is there any significant difference?

Please report OS, driver, GPU, calibration software used with your results. I used 385.28 for my tests, otherwise rig as in my sig.

Thanks!
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Last edited by Manni; 21st February 2019 at 13:00.
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Old 21st February 2019, 13:01   #54918  |  Link
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is send BT 2020 on or off?
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Old 21st February 2019, 14:15   #54919  |  Link
Manni
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Originally Posted by huhn View Post
is send BT 2020 on or off?
It's on when I play HDR content, not when I calibrate. And it doesn't matter if 8bits or 12bits, as the profile is the same: SDR when calibrating, as I use SDR patterns to calibrated my SDR DCI-P3 calibration, HDR when playing content.

In any case, it can't make any difference, I select the calibration manually when I calibrate.

"Send BT2020" is only a metadata flag in the SDR HDMI stream that I asked madshi to implement to help selecting a calibration automatically. It doesn't change anything in the content/patterns themselves. The only thing it can achieve is getting the display to switch to a different calibration, that all.

So as long as the proper calibration is selected when calibrating, no difference can come from that. I know it's the case here, so make sure it's the case when you run the test.

If you need BT2020 to be on for your display to select the widest gamut, then use it. Just make sure the same calibration is enabled in 8bits and 12bits, so that there shouldn't be any difference when measuring it.
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Last edited by Manni; 21st February 2019 at 14:18.
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Old 21st February 2019, 14:23   #54920  |  Link
huhn
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399.07 960
displaycal 3.7.1.4
windows 10 17134
no correction
simulation profile DCI P3 D65
send bt 2020 was not used
screen with native gamut

biggest delta E between 8 bit at 8 bit and 10 bit output at 12 bit 0.2.
the used vertification testchart only uses 50% steps(didn't know that before) i do a proper one on the weekend or maybe today.

BTW. i'm not even aware of a LCD screen that can do DCI p3 100 %.
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