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@jerry121 Sorry, I forgot to mention something important: Make sure to let your display on at least 30 minutes showing some kind of image, preferably with the Colorimeter placed on the display, before you start to calibrate it.
Im attaching new calibration reports, first with black output set to relative, second with data levels set to full in resolve, still no luck.
You’ll have to check step by step.
Disable any LUT3D in Resolve, try to measure display as is on custom color mode. If measurements match the behavior of display on that mode (though decklink + resolve, or plugged to your mac with “use mac profiles for resolve” disabled), next step is to verify (again without LUT3D) if custom profile matches display behavior.I think you should diable all your custom calibration settings for Resolve, create a new project, feed it with sample Rec709, 100% saturation, RGBCMY test patches (you can get them in AVSForum) and measure it through displaycal/hcfr with no calibration and testing if it matches whatever that display is meant to behave (EDID or driver ICC profile).
All these undersaturation errors point that it may be something in the video pipeline that is messing with the signal and to find it should be your priority. So no calibration at all, just try to measure if display matches its native behavior (EDID or driver ICC) on a native gamut OSD preset.
And if you cannot do this thing though the decklink card, plug it directly to your mac computer and do all these steps, just to check that it is behaving as it should (but remember that pluged through mac GPU resolve is going to use display icc unless you configure it to do not )
Something’s really messing up with the brightness and contrast, in the first measurement the Display profile luminance is around 100 cd/m² but the Measured luminance is around 121 cd/m².
@jerry121 Did you also set the Data levels to Auto in DisplayCAL?
@vincent Is it correct that the Tone curve is set to As measured in the Calibration tab, but set to Gamma 2.4 in the 3D LUT tab? Should it be set to 2.4 in both places? See in the screenshots @jerry121 attached.Also Input encoding and Output encoding in 3D LUT settings may be the culprit… 🤔
Its worth mentioning sometimes when I adjust white point trough RGB monitor settings it hits demanded 100% brightness . Another time when adjusting it again it’s showing different value like 120% brightness with same values in monitor.
I’ve got a Windows laptop laying around but it doesn’t have thunderbolt port so can’t connect my ultrastudio 3g deckilink to it which I believe is necessary.
Its worth mentioning sometimes when I adjust white point trough RGB monitor settings it hits demanded 100% brightness . Another time when adjusting it again it’s showing different value like 120% brightness with same values in monitor.
That indicates that the HDMI output level changes. That can happen if you change it from Limited to Full (Full will be brighter, I think). Probably there is a mismatch somewhere with the levels like @vincent said.
OK I searched a bit, but try this:
- In DaVinci Resolve Project Settings under Video Monitoring check “Use 4:4:4 SDI”, and make sure Data levels are set to “Full”!
- In DisplayCAL set Data levels to “Full” also, then calibrate it.
If this doesn’t work, I have more fixes for you to try, but first see if checking “Use 4:4:4 SDI” changes something. Also please before calibrating check if the “Use 4:4:4 SDI” even changes something, if not we will proceed with the next “fix”.
Source: https://lowepost.com/forums/topic/24107-resolve-video-monitoring-use-444-sdi-question/
I’ve got a Windows laptop laying around but it doesn’t have thunderbolt port so can’t connect my ultrastudio 3g deckilink to it which I believe is necessary.
It’s good that you have a Windows laptop as that can help as a last option, do you also have an HDMI on your Mac? But, first try what I found.
Also keep the Gamma to Relative and the other settings as I said.
Use SDI 4:4:4 doesn’t change anything, calibration with full levels in resolve and full levels in Displaycal makes similar wrong validation as previously.
Use SDI 4:4:4 doesn’t change anything, calibration with full levels in resolve and full levels in Displaycal makes similar wrong validation as previously.
Hmm, strange it doesn’t change the brightness. Keep it on just in case.
I think that this one is pretty dumb, but what if you open your monitor settings, go to Color and change Input Color Format to YPbPr instead of RGB?
Also as per Vincent’s suggestions, if your Mac has an HDMI port, you can plug in your monitor to the HDMI port and calibrate it normally using DisplayCAL for the Desktop. I’m not entirely sure how this works on MacOS so excuse me about that. Make sure that you have the display’s default ICC profile enabled, not a custom one. Switch the monitor back to RGB, if you tested with YPbPr. Keep all DisplayCAL settings as they are except in the Display and instrument tab change Output levels to “Auto”, than in the Calibration tab for Tone curve set it to Custom, Gamma 2.4, Relative, 100%, and in the 3D LUT tab uncheck “Create 3D LUT after profiling”. Then after calibrating you may need to manually enable the ICC profile on MacOS, for the verification, but I don’t know how it works there. If you get a good calibration like this then after verifying it and making sure it is good, go to the 3D LUT tab and with all of the settings same, just click Create 3D LUT (make sure that Apply calibration (vcgt) is checked if you use your monitor through the Decklink). Then reconnect your monitor to the Decklink and apply that LUT that you generated in DaVinci Resolve. Finally verify it again from DaVinci Resolve and check if everything is correct. If it’s not first try switching Display levels to Limited, and with the same LUT without re-calibrating it just re-verify it.
Did you also try the DisplayCAL version that I mentioned?
When changed to YPbPr evrything changes to funky colors like in falsecolor video in camera. Please see last report attached, color temperature looks somehow better than before. As for testing levels as Vincent advised I cant find these RGBCMY test patches.
When changed to YPbPr evrything changes to funky colors like in falsecolor video in camera. Please see last report attached, it looks somehowe better ?
Yes, it’s better, but how did you make it like that? Did you use Levels to Full everywhere or Limited?
Ive used full in Resolve and full in Displaycal, i dont ave such setting in my monitor for full levels though… The other monitor Ive got doesnt receive signal from thunderbolt so cant test if thats the problem, actually let me test my sony bravia where im able to set to full levels in it
Keep everything like it is in this state (the way you achieved that verification), go to the Calibration tab in DisplayCAL and for Tone curve set it to Custom, Gamma 2.4, Relative, 100% there also! So essentially set the Gamma both in Calibration, 3D LUT, and Verification the same. Let’s hope this will fix it entirely!
Ive used full in Resolve and full in Displaycal, i dont ave such setting in my monitor for full levels though… The other monitor Ive got doesnt receive signal from thunderbolt so cant test if thats the problem.
Hmm, what do you mean Thunderbolt? Don’t you send the signal to the Dell monitor via HDMI?
So you aren’t sure what made the calibration better? Did you make it with the “SDI 4:4:4” thing? 😁
Signal goes from macbook- thunderbolt cable – to ultrastudio3g device -hdmi cable- to dell monitor. Yes I keep the use SDI 4:4:4 on
