Fullscreen recording issue with extended display

[5cutters]

I'm trying to record a fullscreen opengl app with mixed success on a two monitor setup using RecorderApi.DesktopDuplication.

If i have the desktop set to display only on monitor 1 in windows the recording works;

ok.log

But if i change the desktop to extended the capture records a flickering video (with intermittent black frames) and log file shows "Desktop temporarily unavailable: hr = 0x887a0026, error = The keyed mutex was abandoned." errors;

bad.log

The only difference is that monitor 2 is now active, but no recording is being attempted on it (and it is not set as a RecordingSource).

If the fullscreen application on monitor 1 is changed to run windowed then recording is also successful.

Any ideas or settings to change to record a fullscreen application on monitor 1 when the displays are set as extended?

Windows build is Win11 24H2, 26100.2454 if that is a factor.

[sskodje]

I'll try reproduce the issue and see if i can figure it out :)

[5cutters]

Hi @sskodje , any luck recreating the issue at all - or do you think it's more likely something my end?

[sskodje]

Hi! I apologize for the late answer, i have been busy and forgot all about it 😳. I have now tried to recreate it with the OpenGL game Amnesia: Dark Descent with a 4k monitor attached as extended, but i did not manage to reproduce the issue. The recording was 60fps as expected. Which leaves us with quite a few possibilities, like the app itself, the graphics hardware or drivers, etc..

The error is described here.

DXGI_ERROR_ACCESS_LOST if the desktop duplication interface is invalid. The desktop duplication interface typically becomes invalid when a different type of image is displayed on the desktop. Examples of this situation are:

Desktop switch
Mode change
Switch from DWM on, DWM off, or other full-screen application

In this situation, the application must release the IDXGIOutputDuplication interface and create a new

Indeed this happens when you alt-tab in and out of a fullscreen application, but it should normally not happen while in fullscreen. A possible workaround could be using the Windows Graphics Capture API instead, by setting the RecorderApi property on your DisplayRecordingSource. The yellow border can also be disabled with the IsBorderRequired property.

[5cutters]

Thanks.
Think the last time i tried the windows graphic capture API with a fullscreen OpenGL app it only captured a static image for video.
I'll grab the latest nvidia drivers and see if that makes a difference with either api (GPU being used is RTX4060)

[5cutters]

Updated drivers and still get the same issue with extended desktop when recording a fullscreen opengl app. No luck using windows graphics capture instead either.

Not sure if it's the app or something else, a strange thing that i've noticed is that if i have the left mouse down and move the mouse on 2nd screen the recording works (?)

Anyway i guess i have a workaround and can simply call displayswitch.exe directly or via cli to change the display config to non extended before recording.