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Old 20th May 2019, 17:27   #56281  |  Link
Manni
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Originally Posted by SirMaster View Post
Yes, but again this is a friends HT that I am configuring and it's an RS600, so 12-bit RGB works fine.

Yes on my own HT with my NX5 of course I use 8-bit with madVR error diffusion dithering and I don't need the report BT2020. But it also does not cause re-sync through my Denon X4200W anyways for if JVC does ever fix 12-bit.
12bits doesn't work fine on the rs600, it does exactly the same re chroma (forces YCC422 with RGB or YCC444 12bits), but you can't use 8bits without getting the magenta bug, so not an option indeed unless you only use 60p, you have to live with the forced YCC422 (or select YCC422 to start with).
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Old 20th May 2019, 17:30   #56282  |  Link
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12bits doesn't work fine on the rs600, it does exactly the same re chroma (forces YCC422 with RGB or YCC444 12bits), but you can't use 8bits without getting the magenta bug, so not an option indeed unless you only use 60p, you have to live with the forced YCC422 (or select YCC422 to start with).
Oh, I thought I remember you saying 12-bit RGB worked on your RS500.

So what are you saying for how should he run his HTPC to RS600 then for tone-mapped HDR? What should we set in nVidia, YCC422 so that it's not happening behind madVR's back?

Last edited by SirMaster; 20th May 2019 at 17:41.
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Old 20th May 2019, 17:43   #56283  |  Link
Manni
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Oh, I thought I remember you syaing 12-bit RGB worked on your RS500.

So what are you saying for how should he run his HTPC to RS600 then for tone-mapped HDR? What should we set in nVidia, YCC422 so that it's not happening behind madVR's back?
Yes, 12bits "works" with the rs500, and I had no choice because of the magenta bug in 8bits.

You should test chroma with various options. Given that the RS600 will force YCC422 with any colorspace in 12bits, I would suppose that selecting this in the driver would be best, but when I do this with the rs2000 it's still a worse result than using 8bits.
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Last edited by Manni; 22nd May 2019 at 07:27.
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Old 21st May 2019, 12:29   #56284  |  Link
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Just started using Madvr, very impressed!

I just had a couple of questions I'm struggling to find answers to. Apologies if I'm not fully understanding this!

The issues I have are:

I want to use madvr to upscale TV at 50hz to 2160p, however switching to 50hz only works if I set the colour output in the Nvidia control panel to 4:2:0 chroma/luma sampling OR 8 bit precision (due to the bandwith limitations of HDMI 2.0). For some reason I can only select 8/12 bit for precision and not 10 bit. My understanding is that HDMI 2.0 has enough bandwidth for full RGB/10 bit output at 50hz so it's annoying the option doesn't seem to be available. (Is there a reason for this?)

But I also want HDR output for films at 23p. So I guess I am forced to set the Nvidia control panel to output 12 bit and not 8 bit? If this is the case I am also forced to use 4:2:0 chroma/luma to allow 50hz to work.

So I guess my question is are you 'stuck' with what you set in the Nvidia control panel for all refresh rates, or can/does Madvr change the colour precision/subsampling output dynamically, along with the refresh rate? I'm running in DX11 FSE mode

ie Can/does madvr switch the output to 10/12bit RGB at 2160p23 and 8bit RGB (or even 12bit 4:2:0) at 50hz?

If not then is the quality difference of always outputting 4:2:0 vs RGB negligible for HTPC use?
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Old 21st May 2019, 16:10   #56285  |  Link
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Why is 12 bit important to you? 4:2:0 at 12 bit is much lower quality than RGB at 8 bit.

I suggest you simply use 8 bit RGB all the time. madVR cannot change the bit depth but if you set 23Hz as 12bit the driver will use 12 bit when madVR switches to 23Hz.

Please do some visual tests, if 12 bit looks the same as 8 bit to you please do not obsess about getting 12 bit. 12 bit really is the least important improvement and not worth sacrificing anything else for.
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Old 21st May 2019, 23:41   #56286  |  Link
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Thanks for the reply... Sorry I was under the impression that the display needed to be configured to 10 or 12 bit for HDR to work. Is that not the case? This was the only reason I was trying to use it.

If it does require it then it seems I must choose between having HDR available (but using 4:2:0) or full RGB, as I can't have both (due to needing to switch to 50hz for TV)
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Old 22nd May 2019, 00:53   #56287  |  Link
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No, HDR does not need 10 bit, at least on Nvidia with old and new drivers. There were some in the middle that did require 10 bit.

AMD does require 10 bit for HDR.
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Old 22nd May 2019, 12:53   #56288  |  Link
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Many thanks I understand much better now. I'd assumed the extra bits were needed to specify the greater luminance for HDR but I've realised this isn't how it works after a bit more reading.

You're right, 10 -> 8-bit dithered by madvr looks almost identical to 10-bit native close up, and is completely indistinguishable at viewing distance. Certainly not worth worrying about!

Thanks again!
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Old 22nd May 2019, 13:14   #56289  |  Link
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To Be fair, it looks almost identical, because most panels do 10-bit badly or are not true 10 bit designs.
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Old 22nd May 2019, 19:46   #56290  |  Link
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It would look almost identical even on a very good 10 bit display. The difference between well dithered 8 bit and well dithered 10 bit is simply very subtle.
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Old 22nd May 2019, 19:49   #56291  |  Link
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Hi,

i am noob for here.
Have this problem:

Add images:


Same configuration settings TV




PLEX TV Oled c8 - HDR:





TV OLED c8 - Mode HDMI / MODE PC / MODE blueray
HTPC - Vega 11 - MAdvr HDR



The HDR logo is activated on TV. (this is not the problem)

Why is it lost in color?
Has anyone had problems with Vega 11?

THANKS
:-S

Last edited by Daicon; 22nd May 2019 at 19:54.
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Old 22nd May 2019, 20:09   #56292  |  Link
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Are you sure it isn't your TV? That looks like a very different white point and you do not mention what mode you are using for the PLEX. Try Expert Dark Room for both. Are you using madVR's tone mapping or just passthrough?

Sorry, I have no experience with Vega.
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Old 22nd May 2019, 20:36   #56293  |  Link
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Originally Posted by Asmodian View Post
Are you sure it isn't your TV? That looks Are you using madVR's tone mapping or just passthrough?
It is also important the FSE (exclusive) or FSW (windowed) you use for Vega. What OS?

PS: No one noticed the image changes a change in Windows10 1903 with HDR passthrought?

Last edited by DMU; 22nd May 2019 at 20:42.
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Old 22nd May 2019, 20:52   #56294  |  Link
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That's usually the difference between 709 and 2020. You're using passthrough, or "output video in HDR format" (or 2020 in calibration settings). PLEX is converting to 709.
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Old 22nd May 2019, 21:08   #56295  |  Link
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With 2020 displayed as if it was 709 I usually get obviously lower contrast. I don't have a lot of experiance trying to judge photos of displays but the contrast seems similar on both. It looks like a white point and tone mapping difference to me, but I could be wrong.
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Old 22nd May 2019, 21:29   #56296  |  Link
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With 2020 displayed as if it was 709 I usually get obviously lower contrast.
That's if the PQ transfer function is not applied to the HDR 2020, but in this case it is.

EDiT: But you're right, it seems a different color temperature.

Last edited by Alexkral; 22nd May 2019 at 21:55.
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Old 22nd May 2019, 21:29   #56297  |  Link
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Anybody else tested 1903 and encountered some issues?
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Old 22nd May 2019, 22:08   #56298  |  Link
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Nope. Been running 1903 since it dropped in insider builds a while ago. No issues for me so far.
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Old 22nd May 2019, 23:01   #56299  |  Link
Daicon
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Originally Posted by Asmodian View Post
Are you sure it isn't your TV? That looks like a very different white point and you do not mention what mode you are using for the PLEX. Try Expert Dark Room for both. Are you using madVR's tone mapping or just passthrough?

Sorry, I have no experience with Vega.
Sure.
The TV have same settings and same mode (Technicolor) with Plex and HTPC Madvr.

just passthrough.
:-(


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Daicon

It is also important the FSE (exclusive) or FSW (windowed) you use for Vega. What OS?

PS: No one noticed the image changes a change in Windows10 1903 with HDR passthrought?
Windows 10.
I activated FSE, but dont have any effect different. :-S

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Originally Posted by Alexkral View Post
That's usually the difference between 709 and 2020. You're using passthrough, or "output video in HDR format" (or 2020 in calibration settings). PLEX is converting to 709.
MMM
I have researched a little, and it seems that the problem continues that way ...

That is to say.
When I deactivate "passthrough", and I select in "calibration" 709, the image (SDR) is very similar in color to the HDR of PLEX (but without the brightness / etc of the HDR, of course.)
When selecting 2020, the image (SDR) becomes more muted, as it happens to me in HDR.

The problem is that I select the options that I select, when HDR is activated in full screen, I always get the SAME result as the 2nd image I have set.

Any solution?
What am I doing wrong...??
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Old 22nd May 2019, 23:23   #56300  |  Link
DMU
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Windows 10.
I activated FSE, but dont have any effect different. :-S
What version of AMD drivers and Windows 10?
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