Bug 483668

SUMMARY
In any software, be it OBS or WebRTC (Brave/Chrome) or even Spectacle, I just cannot get a video capture of any screen or window. When Pipewire's selection appears, all I see are icons instead of the contents.

STEPS TO REPRODUCE
1. Open a software, any that can watch the screen (let's say OBS)
2. Screencast either an app or a screen
3. Select one, and wait...

OBSERVED RESULT
Nothing happens. No capture performed.
On OBS, not even a pixel appears, and the box stays 0x0.
On Brave, the cast just stops.
On Spectacle, the capture border remains, with the darker background around and all, and I have to kill Spectacle's process to take it out.

EXPECTED RESULT
A screen capture.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 6.7.8-arch1-1.1-g14
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
Here are the terminal outputs in OBS, Brave, and Spectacle:

OBS:
...
info: ------------------------------------------------
info: [pipewire] Screencast session created
info: [pipewire] Asking for desktop
warning: [pipewire] Failed to start screencast, denied or cancelled by user

Brave (Chrome):
...
[6525:6525:0315/141916.271709:ERROR:screencast_portal.cc(367)] Failed to start the screen cast session.
[6525:6525:0315/141916.271747:ERROR:base_capturer_pipewire.cc(81)] ScreenCastPortal failed: 3

Spectacle, trying to screen record:
kpipewire_record_logging: VAAPI: Failed to initialize display
kpipewire_record_logging: DRM device not found
kpipewire_record_logging: VAAPI: Failed to initialize display
kpipewire_record_logging: DRM device not found
qt.qml.typeresolution.cycle: Cyclic dependency detected between "qrc:/qt/qml/org/kde/desktop/private/TextFieldContextMenu.qml" and "qrc:/qt/qml/org/kde/desktop/MenuItem.qml"
kpipewire_record_logging: VAAPI: Failed to initialize display
kpipewire_record_logging: DRM device not found
kpipewire_record_logging: VAAPI: Failed to initialize display
kpipewire_record_logging: DRM device not found