Screensharing fullscreen applications results in a frozen stream

(#4164) Bug Open: Needs triage desktop video voice

Reproduction steps

  1. Have a fullscreen application open (ex. Minecraft Java 26.3, Geometry Dash)
  2. Stream the fullscreen application in Fluxer
  3. Observe that the stream is just a frozen frame
Minecraft Settings:
  • Minecraft Java 26.3, all default Minecraft settings except: Set "Fullscreen" to ON, set "Exclusive Fullscreen" to ON
Geometry Dash Settings:
  • Use the "Fullscreen" option

Expected behaviour

Can stream fullscreen applications without the stream freezing

Actual behaviour

Streaming fullscreen applications will just stream a frozen frame. Audio still works, it does not matter whether the application is focused or not

Build information

Canary Desktop 2026.523.211053, Web 2026.1008.22643, Windows 10 10.0.19044 (x64), Electron 41.2.2, Chrome 146.0.7680.188, Node 24.14.1, Locale en-US

Platform

Windows

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