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Old 18th October 2020, 10:23   #60361  |  Link
ND2560
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Can someone help me with potplayer&madvr. When I watch movies with HDR the picture looks too dark somehow. Like not by much.
Like for example I watched a Batman Returns 4k scene on youtube with HDR on(in windows settings) and it looked brighter than my file on potplayer&madvr. Like on youtube you could see the texture on batman cape and sharp detailed hair on Michael Keaton but on my player it has big dark tones where these details should be.
With the potplayer control panel I can't adjust the video settings like birightness, contrast, etc. It doesn't affect the picture with madvr active.
Is there somewhere a setting on the madvr settings/or potplayer settings where I can bright the picture up? And by how much?

Thank you!
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Old 20th October 2020, 14:27   #60362  |  Link
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@Andy o that's fantastic news, and I hope that's the future of media playback on any platform including the PC. This is also the ideal way of finally getting rid of dropped/repeated frames in any scenario and with any config.
I am very interested in that feature but haven't seen any news either on that front in madVR since the last time madshi talked about G-Sync.
I hope with VRR becoming mainstream the Envy will adopt it too and we will be able to test that in madVR. Ideally at one point there should be a standard API in Windows that any foreground app can use to dynamically and seamlessly match the display refresh to its content and we can run VRR all the time.
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Old 20th October 2020, 15:20   #60363  |  Link
toniash
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Quote:
Originally Posted by ND2560 View Post
Can someone help me with potplayer&madvr.
Is there somewhere a setting on the madvr settings/or potplayer settings where I can bright the picture up? And by how much?

Thank you!
In potplayer F5 -> Video -> ColorSpaces -> In colourControls you can adjust brightness and contrast, etc., also with shortcuts Q W E (reset Down Up)
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Old 20th October 2020, 16:16   #60364  |  Link
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In potplayer F5 -> Video -> ColorSpaces -> In colourControls you can adjust brightness and contrast, etc., also with shortcuts Q W E (reset Down Up)
Hey thanks for the reply!

So these settings only change the picture of video/files without hdr. For files with hdr I could turn up the brightness and nothing happens. Even in the madvr settings in 'color&gamma can put brightness on 100 and nothing happens to the hdr picture.

It's interesting. I put my 4k bluray of Blade Runner 2049 in my XboxOne and paused in one of the city light scenes while playing a 4k file of the same movie/same scene in potplayer with madvr. I wanted to see if there are significant differences. And there were none.
I'm still learning about HDR and my Optoma projector. Maybe I have to play with the projector settings but I find it strange that the settings on potplayer/madvr won't affect the hdr on the player itself.
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Old 20th October 2020, 18:48   #60365  |  Link
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You can adjust HDR brightness this way:
madvr settings > devices > hdr > tone map hdr using pixel shaders > target peak nits

Lower values gives brighter image.
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Old 20th October 2020, 20:07   #60366  |  Link
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Originally Posted by clsid View Post
You can adjust HDR brightness this way:
madvr settings > devices > hdr > tone map hdr using pixel shaders > target peak nits

Lower values gives brighter image.
Which is the exact number to put there?
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Old 20th October 2020, 20:45   #60367  |  Link
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So I was surprised to learn that mpv has been supporting G-Sync for quite a while now. I installed it and sure enough, it works on my 65C9. It seamlessly switches refresh rate without blanking the screen, basically what HDMI 2.1's QMS is supposed to do. There's even an old post (from 2017!) at blurbusters saying it works with VFR video.
That is very cool. I do wish madVR had support for VFR & VRR, that is how it should work.

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Originally Posted by Andy o View Post
Has there been anything on madVR supporting it since VRR got more mainstream with the newer TVs? I can't find anything about it, but I remember years old posts asking for it and madshi (IIRC) saying it wasn't feasible at the time.
No news from madshi and the technical issues have not changed. madshi wants to be able to send a frame to the OS with a timestamp, knowing exactly when it will be presented. As it is now the OS/GPU will send a frame to the display as soon as it gets it when using VRR. This means madshi would need to control the present timing in user mode software, which is much less precise than the V-sync intervals madVR frames are presented at today.

I think the level of precision madVR could achieve would still be a great experiance but it is a lot of work to develop and test. Has anyone analyzed MPV's output? No apparent frame timing issues?
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Old 21st October 2020, 00:44   #60368  |  Link
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Which is the exact number to put there?
What is your tv? Do you watch SDR at 100 nits or higher?
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Old 21st October 2020, 05:54   #60369  |  Link
LordX2
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Composition rate - 1080p vs 4k

So under DISPLAY MODES I set the value to allow the video to sync up when entering full screen.

In the box below, where it allows you to enter resolutions to switch to, I tried putting in 2160p23, and 3840x2160p23. Neither worked when trying to play a 1080p file - so I tried 1080p23 and it worked. Shows the composition rate at 23.976 even though the actual refresh rate isn't exactly that. So that is good!

Then I tried to play a 4K mkv file - and it does NOT show the composition rate at 23.976... the composition rate matches the refresh rate of the screen.

What did I do wrong? How can I get the 4k file (playing on a 4k screen) to have the 23.976 composition rate?

Is the proper line 4k23 or something like that?
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Old 21st October 2020, 06:03   #60370  |  Link
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the correct way to use it is to add only native resolutions like this:
2160p23, 2160p24, 2160p50, 2160p59, 2160p60.

the composition rate is unrelated to this the player has no way to change that it the rate the desktop runs at and it a little bit buggy in win 10.

what is the screen even can it even do 23p?
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Old 21st October 2020, 09:42   #60371  |  Link
Andy o
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Originally Posted by Asmodian View Post
Has anyone analyzed MPV's output? No apparent frame timing issues?
I tried mpv and it was switching frame rates, and I didn't do any fancy analysis, but I did see a few stutters, so it's not perfect. Besides, as a player, it's not really too useful for me cause it appears to not be able to bitstream higher than legacy multichannel audio. From what I can tell it's more like a proof of concept for our purposes, but I was surprised to be just hearing about it after at least 3 years that it was reported to work. Someone at AVS Forum mentioned it just off the cuff and I went googling.
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Old 21st October 2020, 11:01   #60372  |  Link
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Originally Posted by Alexkral View Post
What is your tv? Do you watch SDR at 100 nits or higher?
PC monitor AW3420WD calibrated to ~100 nits for SDR blu-rays.

Last edited by Siso; 21st October 2020 at 23:07.
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Old 21st October 2020, 16:25   #60373  |  Link
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Quote:
Originally Posted by huhn View Post
the correct way to use it is to add only native resolutions like this:
2160p23, 2160p24, 2160p50, 2160p59, 2160p60.

the composition rate is unrelated to this the player has no way to change that it the rate the desktop runs at and it a little bit buggy in win 10.

what is the screen even can it even do 23p?
Thank you for replying!

The screen can definitely do 23hz, I set it there all the time.

The composition rate DID change when madvr switched to 1080p - so madvr did have an impact on the composition rate.

Would just like to do it at 4k. Never switch down to 1080p, just make the composition rate 23.976 at the 4k level.
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Old 21st October 2020, 18:35   #60374  |  Link
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Originally Posted by Siso View Post
PC monitor AW34WD calibrated to ~100 nits for SDR blu-rays.
You mean AW3420DW? It is advertised at 350 nits, but rtings says that after calibration it only reaches 247. That should be the number for target peak nits if you want the SDR conversion to have the same brightness level as the HDR would have. If you want a brighter image you can reduce it, but in your case I wouldn't go further than 125.

Also make sure to use madVR's dynamic tone mapping (check "measure each frame's peak luminance") and set the backlight to max. In the new betas there are a lot more options, but they shouldn't alter this too much.
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Old 21st October 2020, 18:49   #60375  |  Link
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Quick update,

I set the two resolutions for madvr to 2160p23, 2160p24

The composition rate is 23.980 when playing at my native resolution.

When I set the resolution in madvr command line to 1080p23, I obviously notice the res change when I play the file, and the composition rate is then 23.976 exactly, even though the refresh rate is still 23.980.

I would like to achieve this composition rate at the 4k level, without having to switch to 1080p.

Final issue - when madvr changes to 1080p, it doesn't automatically start playing the file, I have to hit space to start it... I sat there staring at a blank screen for like 30 seconds last night wondering if the program froze.... ahahahahah
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Old 21st October 2020, 19:18   #60376  |  Link
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I would rather have the composition rate match the refresh rate, it isn't good when they differ. I think your 1080p results are where it goes wrong, not 4K.
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Old 22nd October 2020, 00:21   #60377  |  Link
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I would rather have the composition rate match the refresh rate, it isn't good when they differ. I think your 1080p results are where it goes wrong, not 4K.
It's weird, cuz if I set my gpu to the 23.98hz mode, it matches the composition rate.

But if I use full screen exclusive mode, the composition rate shows 60hz, but the screen is still running 23.98hz.

it matches only in regular full screen.
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Old 22nd October 2020, 01:09   #60378  |  Link
ND2560
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Originally Posted by clsid View Post
You can adjust HDR brightness this way:
madvr settings > devices > hdr > tone map hdr using pixel shaders > target peak nits

Lower values gives brighter image.
Hey thanks for the help!

Sadly I tried changing it from 200 to 190/150/50 but see no change when watching a hdr file/video....
Think I will give it up and up the brightness on my projector.
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Old 22nd October 2020, 01:21   #60379  |  Link
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But if I use full screen exclusive mode, the composition rate shows 60hz, but the screen is still running 23.98hz.
Yes, FSE usually does more harm than good in recent Windows 10 builds.
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Old 22nd October 2020, 19:42   #60380  |  Link
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Originally Posted by tp4tissue View Post
It's weird, cuz if I set my gpu to the 23.98hz mode, it matches the composition rate. But if I use full screen exclusive mode, the composition rate shows 60hz, but the screen is still running 23.98hz.
Isn't that expected behaviour because composition rate is the rate of the DWM, and exclusive mode bypasses it?
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