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Old 22nd January 2020, 20:12   #58401  |  Link
chros
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I think it's realeted to resizing. E. g. play a 2160p video on 1080p screen:
- normally chroma will be upscaled to 2160 and then both to 1080
- if it's enabled then there won't be chroma doubling
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Old 22nd January 2020, 20:37   #58402  |  Link
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Originally Posted by SirMaster View Post
Is this really lower quality? And why or in what way would it be lower quality when enabling the option? Why shouldn't we always have that option enabled?
You do get different chroma... whether or not it is worse is more debatable. In testing it does seem better to handle chroma the same as luma but it is one of the least loss of quality options in trade quality for performance.
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Old 22nd January 2020, 21:45   #58403  |  Link
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Quote:
Originally Posted by clsid View Post
The screenshot shows "HDR: unknown properties", meaning it can't find the HDR metadata.

Use LAV Video decoder. Disable the internal video decoder and video processor in Potplayer.
Thank you for your answer. But I already use LAV Video decoder:
https://i.imgur.com/HZOJZpJ.png
https://i.imgur.com/1MmvsgE.png
My exported Potplayer settings are here.
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Old 23rd January 2020, 13:19   #58404  |  Link
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Having problems with repeated frames on 24.000fps content. I've nuked my drivers and reset Madvr to default still seeing the same issue (1060GTX.)

Please see attached images. I am not able to access 24.000hz fine tuning. 23.976hz I can.

I nuked my drivers and tried 24 again before fine tuning 23.976 incase it was causing issues didn't make a difference.
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Old 23rd January 2020, 14:28   #58405  |  Link
hannes69
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Originally Posted by IngramAU View Post
Please see attached images. I am not able to access 24.000hz fine tuning. 23.976hz I can.
Attached images in this forum can take a long time until we can see them, so it would be better to upload them to an image hoster.
24.000Hz and 23.976Hz sometimes 'interfere' in certain setups/drivers.
A possible workaround could be to use multiples of these values (so youŽll have e.g. 23.976Hz and 48.000Hz or 47.952Hz and 24.000Hz or 72.000Hz...
Of course this depends on your display deviceŽs capabilities, so your monitor/tv/beamer has to accept these refresh rates.
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Old 24th January 2020, 01:47   #58406  |  Link
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Originally Posted by mclingo View Post
Hi,this is rough representation of what I am seeing with RX 5700 bug, beginning of bladerunner 2049

https://1drv.ms/u/s!AgvFafeelEBij75e...ll3yw?e=nM5M1Y
Use Madvr's tonemapping, The Tv's tonemapping is prolly poop anyway.

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Old 24th January 2020, 01:50   #58407  |  Link
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I have now a full 10-bit path madVR-GPU(gtx 1060)-Display(4k monitor). Is there any disadvantage which I have to pay attention to ?
You need to test it with 10bit/8bit gradient test files. See which one is smoother.

But since 444 60hz only works in 8bit, and autoswitch 23/24hz is hit or miss depending on driver, I've stuck with 8bit.

I've not seen 10bit input produce noticably smoother gradient either because madvr's dithering is great.
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Old 24th January 2020, 01:57   #58408  |  Link
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Originally Posted by huhn View Post
the current in progress version killed 1080 by just tonemapping with a version to saying it will be released like that but still.

is this true ? we all have to buy 1080tis now ?
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Old 24th January 2020, 02:00   #58409  |  Link
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Originally Posted by Siso View Post
In short, I'll stay to 8 bit.
Since you own a colorimeter, you can test both and see if your accuracy increases/ decreases/ contrast/ gradient smoothness etc.
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Old 24th January 2020, 02:37   #58410  |  Link
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Quote:
Originally Posted by tp4tissue View Post
You need to test it with 10bit/8bit gradient test files. See which one is smoother.

But since 444 60hz only works in 8bit, and autoswitch 23/24hz is hit or miss depending on driver, I've stuck with 8bit.

I've not seen 10bit input produce noticably smoother gradient either because madvr's dithering is great.
By switching madVR's dithering off I can see 10bit gradient files smoother by 10bit path. Hope that some browsers can take advantage of it when playing videos, but I'm not sure.
You have to connect via Displayport to have 444/60Hz 10bit and some newer driver versions don't like it.
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Old 24th January 2020, 03:05   #58411  |  Link
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yeah and what else should happen if you disable dithering?
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Old 24th January 2020, 04:19   #58412  |  Link
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I haven't noticed anything else except 10bit path playing gradient files smother than 8bit path. I just did that for testing only, and always enable dithering in madVR. I have to find out how to test videos such as football matches in browsers to see if 10bit path might have any effect.
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Old 24th January 2020, 04:25   #58413  |  Link
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that's not a "test" how could there be another result.

you have to test if 8 bit dithering or 10 bit dithering is smoother.
yuor test is comparable to taking a shower and figuring out if you get wet or not.
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Old 24th January 2020, 06:21   #58414  |  Link
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Yeah, it's not a test, just what I can see. I don't know how to test browsers such as Edge or Chrome which don't tell about bit depth and dithering options/settings.
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Old 24th January 2020, 07:05   #58415  |  Link
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if the web browser doesn't dither(they don't) 10 bit rendering would be always better but it's not that easy to render 10 bit so they generally don't do that.

10 bit rendering with dithering on a screen that doesn't support it will always win against 8 bit none dithering. so what is the point of looking at 8 bit none dithered ever why should 10 bit none dithered not always be better? i mean the screen doesn't even matter in this case.
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Old 24th January 2020, 07:31   #58416  |  Link
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Managed to get MadVR to accept a 24hz custom mode by going for 23.999xxx hopefully after a few runs I can get it closer to 24. Not sure why I can't start off from my EDID it just won't accept it with an unknown error.
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Old 24th January 2020, 15:27   #58417  |  Link
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Quote:
Originally Posted by tp4tissue View Post
Use Madvr's tonemapping, The Tv's tonemapping is prolly poop anyway.


There is a well documented bug with AMD HDR API which causes this, its nothing to do with tone mapping, AMD's private API isnt sending BT2020, we have to use windows HDR API for now.

I'm already using MADVR's tone mapping, however I have to turn on WINDOWS HDR first which isnt ideal but there is no fix in sight for this bug yet.
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Old 24th January 2020, 16:45   #58418  |  Link
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Quote:
Originally Posted by huhn View Post
10 bit rendering with dithering on a screen that doesn't support it will always win against 8 bit none dithering. so what is the point of looking at 8 bit none dithered ever why should 10 bit none dithered not always be better? i mean the screen doesn't even matter in this case.
I wanted to expand on this because it is an interesting and more subtle point than I thought.

With dithering disabled you are not reality testing your 8 vs 10 bit paths. 10 bit will always look smoother even if, with dithering, 8 bit would look smoother.
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Old 24th January 2020, 18:55   #58419  |  Link
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If you're unsure whether your display is 8-bit or 10-bit, there really isn't a test to determine that 100% anyway. But if you know the bit depth, you can certainly test for banding in different desktop and TV modes. And for that, I would recommend disabling dithering in madVR. You still can't be sure that the video card itself doesn't do any dithering, but it's a start. Just make sure to turn it back on when you're done testing.
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Old 24th January 2020, 19:15   #58420  |  Link
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@Mclingo, I'm very curious to follow this bt2020 bug, could you please lnk something regardig the documentation you are referring to?
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