madVR - high quality video renderer (GPU assisted)

[Asmodian]

BT.2020 displayed as if it was P3 is washed out, BT.2020 is very large and anything else assumes the content covers a much smaller range.

[huhn]

but if you don't tell madVR that the display is calibrated to X it will convert it to bt 709 with SDR output.

to get it washed out you have to set this display is calibrated to something over BT 709 but he said the display can't be set to that so why would he do that?

[LordX2]

I wonder if maybe his solution is similar to mine? Select Limited for his PJ? Worth a shot.

Try either: MadVR Limited, GPU Full, PJ Limited

OR

MadVR Full, GPU Limited, PJ Limited

[huhn]

limited and full range is a different art to pack the same data. bt 2020 and bt709 are complete different data.

[stefanelli73]

Originally Posted by huhn

but if you don't tell madVR that the display is calibrated to X it will convert it to bt 709 with SDR output.

to get it washed out you have to set this display is calibrated to something over BT 709 but he said the display can't be set to that so why would he do that?

The vpr always reports BT.709 both with a 3dlut in SDR-DCI P3 and in THIS DISPLAY IS ALREADY CALIBRATED (DCI P3 or BT.2020)

[stefanelli73]

Originally Posted by LordX2

I wonder if maybe his solution is similar to mine? Select Limited for his PJ? Worth a shot.

Try either: MadVR Limited, GPU Full, PJ Limited

OR

MadVR Full, GPU Limited, PJ Limited

I'll try...thanks.

[mclingo]

Hi, just looking at black levels again as seem to have some odd issues, just want to get my head straight again first.

1 Full, Full, Full -- Video Level CORRECT : WtW & BtW Clipped, Single scaling
2 Full, Full, Limited -- Video Level WRONG : Crushed Blacks
3 Full, Limited, Full -- Video Level WRONG : Washed Out Colors
4 Full, Limited, Limited -- Video Level CORRECT : WtW & BtW Clipped, Double scaling
5 Limited, Full, Full -- Video Level WRONG : Washed Out Color
6 Limited, Full, Limited -- Video Level CORRECT : WtW & BtB preserved, Zero scaling
7 Limited, Limited, Full -- Video Level WRONG : Extreme Washed Out Colors
8 Limited, Limited, Limited -- Video Level WRONG : Washed Out Colors

6 being the ideal scenario what exactly does this equate to, I thought it was:


MADVR "0-235" -- AMD "444:FULL RGB" -- LG OLED TV "LOW", low being limted.

However this is wrong, everything is crushed, eh?


i'm guessing MADVR should be 0-255 to match the GPU?

[SamuriHL]

No, something is wrong there. Are you SURE your LG is set to low? Because it absolutely should be Limited, FULL, Limited (madvr, gpu, display). Of course, I don't know much about AMD cards so who knows what that's doing?

[mclingo]

AMD 444 FULL RGB - MADVR 0-255 - LG OLED HIGH - gives corrects results
AMD 444 FULL RGB - MADVR 0-255 - LG OLED LOW - gives crushed results

AMD 444 FULL RGB - MADVR 16-235 - LG OLED HIGH - gives correct results
AMD 444 FULL RGB - MADVR 16-235 - LG OLED LOW - gives crushed results

can anyone make sense of this?

[huhn]

Originally Posted by stefanelli73

The vpr always reports BT.709 both with a 3dlut in SDR-DCI P3 and in THIS DISPLAY IS ALREADY CALIBRATED (DCI P3 or BT.2020)

yes you are using AMD it can't send bt 2020 out side of HDR. AMD can't report anything else.

edit: full range for everything is recommended for everything the scaling stuff is a lie written by someone not knowing how ycbcr -> RGB works.
you can do convert directly to full RGB and directly to limited RGB this is just none sense.

[VBB]

@mclingo - when you say correct results, do you mean for playback or desktop use? If you need both, then it's either GPU Full -> madVR 0-255 -> TV High or GPU Limited -> madVR 0-255 -> TV Low. If you only care about video playback, then the ideal setup is GPU Full -> madVR 16-235 -> TV Low.

[VBB]

@huhn - I agree with you, but the OLEDs have banding issues with full range, among other things. Not sure if mclingo's first gen would be affected, though.

[SamuriHL]

Yea for us OLED owners things aren't as cut and dried...sadly. We'd all love to be doing full across the board, but, as VBB said, banding.

[Asmodian]

Originally Posted by mclingo

AMD 444 FULL RGB - MADVR 16-235 - LG OLED HIGH - gives correct results

This should not be correct. How did you determine it is correct?

Unless AMD is automatically converting? Seems very unlikely.

[QBhd]

I am not sure why people say there is banding on LG OLED with the High setting... this is not true. Banding in PC mode, yes. But there is no difference between the High/Low setting with regards to banding.

QB

[Ver Greeneyes]

For the most part I think the LG setting is just named backward. I think High means "expect the full range and keep black 'high' (don't lower it)" and Low means "expect the limited range and make black 'low' (expand the range)". I also had to set mine to "just scan" to disable overscan during boot, and disable some of the OLED screen saver features like screen shift to keep the edge of windows from being shifted off screen.

Edit: Oh yeah, and I also think limited range 8-bit YCbCr444 looks better on this screen than full range 8-bit RGB, like it converts RGB to YCbCr420 and then back internally or something. Pretty annoying. Especially noticeable with small red text on a dark background. I don't have an HDMI 2.1 GPU right now but when I do I'm going to try 12-bit color to see how that compares. I'm using an LG OLED48CX6LB.

[nevcairiel]

Originally Posted by Ver Greeneyes

For the most part I think the LG setting is just named backward. I think High means "expect the full range and keep black 'high' (don't lower it)" and Low means "expect the limited range and make black 'low' (expand the range)".

Not sure you can attribute any real meaning to "High" or "Low" and thus claim its backwards, but High is Full Range either way.
I always assumed it refers to the value range, since full range is higher (255 data points) then limited (219 data points)

[Ver Greeneyes]

Fair enough I much prefer the full range / limited range nomenclature though.

[Asmodian]

Originally Posted by Ver Greeneyes

Especially noticeable with small red text on a dark background. I don't have an HDMI 2.1 GPU right now but when I do I'm going to try 12-bit color to see how that compares. I'm using an LG OLED48CX6LB.

In PC mode my CX seems to round >8 bit to 8 bit internally (or something). I see much worse banding using 10 bit from madVR compared to 8 bit.

I agree YCbCr 444 limited is ideal for LG's OLEDs. I see worse near black banding when using full range RGB compared to limited range 444. It might just be the extra dithering but I think the display simply does better with limited range input.

[Damien147]

I am about to calibrate these days and I want to use Madvr pixel shaders.My TV is a fake hdr(bt.709)4k.I create a 2.2 gamma BT.2020 3DLUT for the calibration page,right?