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#53261 | Link |
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Join Date: Jul 2014
Posts: 733
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OK thanks. Only one GPU here anyway.
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Win10 Pro x64 b1903 MCE i7 3770K@4.0Ghz 16Gb@2.18Ghz EVGA GTX 1080 Ti SC2 11Gb@2GHz 436.48 RGB Full 8bits MPC-BE/LAV/MadVR/jRiver/MyMovies V5.25 Denon X8500H>HD Fury Maestro>JVC RS2000 |
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#53262 | Link | |
Registered User
Join Date: Jan 2009
Posts: 607
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#53264 | Link |
Registered User
Join Date: May 2004
Posts: 4,323
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For me I have to set madvr to 16-235, GPU full, and TV low to get the proper levels on my C8. So no, IMO, it has not changed in the 2018 models. Default brightness of 50. I can only claim this to be my experience.
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HTPC: Windows 10, I9 9900k, RTX 2070 Founder's Edition, Pioneer Elite VSX-LX303, LG C8 65" OLED Last edited by SamuriHL; 15th October 2018 at 17:49. |
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#53265 | Link | |
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Join Date: Oct 2015
Posts: 33
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#53266 | Link | |
Registered User
Join Date: Dec 2014
Posts: 1,126
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If the target nits is higher than the display's actual brightness, you are only getting a ratio of the original curve. Example: 480 target nits shown at 200 actual nits 480 nits is the lowest value of BT.2390 where the soft knee (where compression begins) is above reference white (100 nits). Lower values will place the soft knee lower and lower and compress at least some of the first 100 nits. The lower the target nits, the more reference white is compressed. Approximate display brightness for reference white for 480 target nits at 200 actual nits: 4.8 ratio of target nits/reference white — 480/100 = 4.8 — at 200 actual display nits — puts an untouched diffuse white at close to 42 nits — 200/4.8 = 42 nits In current test builds, if the content is below 480 nits, clipping is selected for as long as possible. This helps improve the brightness of content that is above the soft knee up to the set target nits, and even above the target nits, by eliminating the compression curve and reducing it as much as possible up to the peak brightness of the source. Approximate brightness of 470 nits actual scene peak at 200 display nits with clipping enabled: 2.4 ratio of target nits/display nits — 480/200 = 2.4 — at 200 actual display nits — puts 470 nits at close to 196 nits — 470/2.4 = 196 nits Clipping is always predictable because it is the ratio of the target nits/display nits. BT.2390 is only predictable up to the soft knee. After the soft knee, the entire range is compressed and will change depending on the brightness of the scene. You would actually lose less brightness by outputting in PQ (HDR Output) to an HDR display because the target nits and display nits should match. The gamma curve mismatch means this scale is not exact, but it is a general guide to actual brightness output.
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HOW TO - Set up madVR for Kodi DSPlayer & External Media Players Last edited by Warner306; 16th October 2018 at 16:48. |
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#53267 | Link |
Registered User
Join Date: Nov 2004
Posts: 1
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Hi all,
Does someone know if chroma upscaling in madVR works in one or two steps, when presentation resolution is larger than luma plane resolution? For example, I have a H264 video in 1280x720 pixels (4:2:0 color with progressive scan). So, when I play it on a 1080p display, does madVR: 1. First upscales chroma from 640x360 to luma plane resolution (1280x720) using selected chroma upscale algorithm 2. Combines 1280x720 luma with upscaled chroma 3. Upscales the resulting picture to 1080p using selected image upscale algo OR 1. Directly upscales chroma from 640x360 to desired presentation resolution (1080p) using selected chroma upscale algo 2. Upscales luma from 1280x720 to 1080p using selected image upscale algo 3. Combines both images to presentation picture Thanks! |
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#53269 | Link |
Is this for real?
Join Date: Mar 2016
Location: Norway
Posts: 160
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I am using MPC-HC, and yes of course I have set MadVr as video renderer
![]() With these settings, both black level tests posted here show black crush : - GPU set to Full RGB and 0-255 in Nvidia settings - MadVr set to 0-255 - TV set to : Black level HIGH Gamma 2.2 Brightness 49 OLED light 50 Now the Windows desktop is brighter since I have the TV set to High in Black Level, and as I said the test pattern is very dark. I can't see all the boxes. Edit : Small update here : I have increased my TV brightness to 53, and now I pass the THX Optimizer test image for brightness. Image here : https://ibb.co/dfZPLf Edit 2 :The opening scene in Star Wars the last Jedi when you see the scrolling text over the dark sky with stars, with TV Black level set to Low, the black is perfect black. With Black Level set to High, black is not pitch black anymore. All this confirms my previous testing. So... We can take this discussion in the other tread (https://forum.doom9.org/showthread.php?t=175769&page=6) I can post this there aswell.
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My HTPC : i7 6900K @ 4.2 | nVidia GTX 1080Ti | TV : Samsung 75Q9FN QLED Last edited by Betroz; 15th October 2018 at 21:26. |
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#53272 | Link | |
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Join Date: Aug 2016
Posts: 878
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I have to say i'm glad as they should be no difference and I prefer having correct colour space on my desktop. I guess you just got lucky with your combination of kit and settings, however... I'm guessing this is your first OLED even though you've had several LG tvs? My first gen 4k OLED has a less smooth transition at near black for setting brightness levels in that you have to move the brightness slider two notches to increase or decrease the brightness, this makes it a bit notchy for setting black clipping. This doesnt affect how it shows these elements, just how you setup the TV. This was fixed in the next model E6, so it could be I just cant get that notch that you can. on my black clipping pattern I prefer flashing 18 and above rather than 16/17 as this can produce raised blacks for me, this could be the issue. for me though this is an advanage as it means there is no difference so I can stick with using HIGH and have the correct desktop colour space.
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OLED 4k HDR EF950-YAM RX-V685-WIN10 444 RGB 60hz-AMD RX 5700 19.11.3 KODI DS - MAD/LAV 92.17/0.74.1 - 3D MVC / FSE:ON / MADVR 10bit |
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#53273 | Link | |
Registered User
Join Date: Oct 2016
Posts: 546
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HTPC: Windows 10 1809, MediaPortal 1, LAV Filters, ReClock, madVR. DVB-C TV, Panasonic GT60, 6.0 speakers Denon 2310, Core 2 Duo E7400, GeForce 1050 Ti |
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#53274 | Link | |
Registered User
Join Date: Jan 2009
Posts: 607
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The first visible square in the pattern is equal to bar 17 (0.5%). This is crushed with brightness at default 50 and a full RGB chain. This square is visible with brightness at default 50 and limited>full>limited. As is per my experience with the first C7 I had which I exchanged for this one, and also a plasma a couple other LCDs. |
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#53275 | Link | |
Registered User
Join Date: Dec 2016
Posts: 198
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MadVR puts the diffuse white at about 80 cd/m2 for the said 200 nit monitor. Does this sound as being more in the ballpark? Last edited by mytbyte; 16th October 2018 at 00:06. |
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#53276 | Link |
Registered User
Join Date: Aug 2016
Posts: 878
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ok, i'm going to change my mind on this, I can see a difference, I wasnt giving my eyes enough time to adjust in between changing the settings.
on LOW I can see all but the top corner two blocks far left, on high I cant quite see the top 3 blocks, I can barely see the 3rd one down but its there. Not sure this is enough of a difference for the exta hassle of having a crushed desktop though. But you are correct nonetheless, this is very interesting. I think i'd have to see a real world difference to bother changing my setup.
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OLED 4k HDR EF950-YAM RX-V685-WIN10 444 RGB 60hz-AMD RX 5700 19.11.3 KODI DS - MAD/LAV 92.17/0.74.1 - 3D MVC / FSE:ON / MADVR 10bit |
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#53278 | Link |
Registered User
Join Date: Apr 2013
Posts: 251
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Why would you use 16-235 when you can 0-255 ? I am using FULL on the Nvidia + TV AUTO and MadVR 0-255 , there is a big different in quality when you use 16-235 .. why would you do that.. maybe it depends on the media player ? I don't know. but with Potplayer I just see 16-235 like when the TV can't support it , washed white even on the blackest black on the wide screen black lines that suppose to be blackest black on OLED
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#53279 | Link | |
Is this for real?
Join Date: Mar 2016
Location: Norway
Posts: 160
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Quote:
This is getting a bit off topic I think.
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My HTPC : i7 6900K @ 4.2 | nVidia GTX 1080Ti | TV : Samsung 75Q9FN QLED |
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#53280 | Link | |
Is this for real?
Join Date: Mar 2016
Location: Norway
Posts: 160
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Quote:
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My HTPC : i7 6900K @ 4.2 | nVidia GTX 1080Ti | TV : Samsung 75Q9FN QLED |
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Tags |
direct compute, dithering, error diffusion, madvr, ngu, nnedi3, quality, renderer, scaling, uhd upscaling, upsampling |
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