The VideoLAN Forums

I have three screens:
My primary screen is a ViewSonic VX2458-MHD 24 inch 144Hz 1080p Gaming Monitor.
My seconday and third screens are 4k 60Hz Dell P2415Q.
Neither of those three screens supports native HDR.

Am using VLC 3.0.10, on Windows 10 Version 1709, with an Nvidia 1070 GPU. All default settings.

If I start playing HDR video files they all look great (mostly MKV HEVC Main10, HDR10 video files)
- clearly tone mapped, neither too bright nor too dark.

But as soon as I move the VLC window over to one of my secondary screens (so I can watch them in 4K) they turn much too dark.

I am not sure what the problem is. Is there anything I can do to fix this issue?

Looks like a bug, you should create a new ticket on the VLC Trac with the link to this thread.
https://trac.videolan.org/vlc/

Thanks Lotesdelere,

I have been avoiding trac.videolan.org because my account does not work any more.

I have a user "kwinz" on trac.videolan.org.
I can see myself here on one of the bugreports:
https://trac.videolan.org/vlc/ticket/4656

However I can not login with my saved password.

I tried both my emails that I would use for this to reset the account password.
Just gives me a warning that "Email and username must match a known account."
Creating a new account tells me the email is already taken.

And every refresh of the login page takes 10 seconds.
In summary I hate trac.videolan.org with a passion. What a buggy mess.

I will create a new account when I can stomach interacting with that time waster again.

The Windows update "21H1" seems to have fixed it.
It looks much better now on my system.

We fixed an error that might cause video playback to fail when you switch from an external high-dynamic-range (HDR) display to a built-in non-HDR display.

https://blogs.windows.com/windows-insid ... -channels/

This patch note doesn't match exactly but maybe this is what fixed it.

See also: https://forum.videolan.org/viewtopic.php?f=14&t=147773