Devices > Video Cards, Monitors, Televisions, and Projectors
HDR not working?
tij:
Which version of MC26 you are using?
and your passthrough screenshot - does HDR logo comes on when start playing?
JRU:
I am using MC 26.0.73.
Yes, in passthrough mode the TV displays "HDR10" but the image is dull.
tij:
OK
so MC 23.0.73 has latest MadVR stable version 0.92.17
The only way to know what HDR supposed to look like is to watch in on monitor it was graded on (those are very high brightness professional monitors).
As I said before
no consumer display is even close to display full HDR
as that is the only thing we have - only option is tone map (compress HDR to what our TV/projector can display).
As there is no standard for tone mapping
the whole process is very subjective.
For example
very bright red explosion. You can: clip at what you cannot display - you retain color but loose highlights in very bright areas. You can also diffuse red (mix in blue and green light) - this will boost brightness and highlights will be visible in bright areas but you loose purity of color - red will be not as red anymore (most TV diffusing will also introduce color shifts too
for example it can introduce yellow hue and your red becomes orange).
Whole of the above is to underline that tone mapping is a very subjective area. What most will agree on is that tone mapping should not introduce color shifts - and that's what MadVR tone mapping guarantees - and that's why it is the best (my very own very subjective opinion :) )
Now to your problem. If [passthrough HDR to display] with [output video in HDR format] ticked
and your TV kicks in HDR mode
and picture is crap - likely its your TV setting problem (I cannot help you there as I don't have your TV
only thing I suggest is read manual carefully)
Another way to test your TV - plug in your UHD bluray player and play your UHD disk ... if image is crap, its definitely your TV
For your posted MadVR tone mapping ... the picture looks fine - not sure what you are expecting ... I assume you are using [tone map HDR using pixel shaders] with [output video in HDR format] NOT ticked ... also couple of pointers here:
1. [target peak nits] should be set at a bit lower value than what your TV can output ... you can tweak this value till you like what you see (remember that tone mapping is subjective, so tweak it to your liking not somebody's liking) ... making it lower will increase brightness of picture but desaturate colors ... increasing value gives better color but lowest image brightness
2. In [calibration] setting ... for option [the display is calibrated to the following primaries/gamut] ... don't put BT2020 as your TV cannot cover it ... choose either BT709 (standard HD color) or DCI-P3 (if your TV can cover that)
EDIT: looks like you using PrintScreen to capture images ... better use camera/phone to take picture of your TV ... so can see what your TV display (that print screen of passthrough will be always dull as it is captured before your TV did tone mapping)
mojave:
--- Quote from: tij on May 15, 2020, 04:14:06 pm ---HDR uses BT2020 color space ... no consumer display/projector can display/cover that color space both brightness wise and color wise.
--- End quote ---
The UHDTV Standard includes four separate things:
4K Resolution
HDR - High Dynamic Range which defines the brightness of the image
PQ or HLG - Perceptual Quantizer (absolute) or Hybrid Log-Gamma (relative) are methods of relating HDR to the gamma
WCG - Wide Color Gamut - A display is required to reach 90% of the P3 color space (which is essentially Rec709). A mastering display is calibrated to the P3 colorspace, but UHD Blu-rays use the P3 colorspace inside a Rec2020 container. Many TV's and projectors can meet or get close to the P3 color space.
tij:
--- Quote from: mojave on May 20, 2020, 01:19:21 pm ---The UHDTV Standard includes four separate things:
4K Resolution
HDR - High Dynamic Range which defines the brightness of the image
PQ or HLG - Perceptual Quantizer (absolute) or Hybrid Log-Gamma (relative) are methods of relating HDR to the gamma
WCG - Wide Color Gamut - A display is required to reach 90% of the P3 color space (which is essentially Rec709). A mastering display is calibrated to the P3 colorspace, but UHD Blu-rays use the P3 colorspace inside a Rec2020 container. Many TV's and projectors can meet or get close to the P3 color space.
--- End quote ---
Lol ... what is labeled HDR display theses days still cannot display full HDR specs (most TV will quote their P3 % coverage because its much more impressive than what their BT2020 coverage is) ... and lack of standard for tone mapping makes it worst ... in a way this suits TV manufacturers as they can claim their tone mapping is better than others ... otherwise can not distinguish themselves from so many TVs
Original movies are mastered to P3 on P3 mastering monitors. But they are mastered for cinemas which have much lower brightness. These movies get remastered again for release on UHD on different mastering monitors (1000 and 4000nits I believe from Dolby or Sony) for viewing on much brighter screens in bright rooms. And while its true that during mastering, colorist might not extend colors beyond P3 for simplicity in most cases ... they certainly do add lots of brightness.
In the end ... colorist will try to make picture look best on his 1000/4000 nit display. I highly doubt they take into account how it will look on TV (otherwise they would have been mastering on that TV) ... its the job of the standard to specify how less capable consumer TV should display that ... and frankly HDR10 and HDR10+ are really lacking in this department. Dolby Vision done much better job at this.
Thumbs up to madshi and beta testers at AVS for trying to bring order to this chaos
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version