find a black paddle when i in editor work space #1652

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1. daieven

   added

   bugSomething isn't workingSomething isn't working

   on Mar 8, 2026
2. linear commented on Mar 8, 2026

   

   linearBot

   on Mar 8, 2026 – with Linear

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   CAP-655
3. tembo commented on Mar 8, 2026

   

   temboBot

   on Mar 8, 2026 – with Tembo

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   Thanks for the detailed report with screenshots. This appears to be related to window exclusion not being implemented for Windows.

   Looking at the codebase, the recording controls toolbar (in-progress-recording window) is supposed to be excluded from screen captures, but this exclusion logic is currently macOS-only:

   • In apps/desktop/src-tauri/src/recording.rs:847-856, the excluded_windows logic is wrapped in #[cfg(target_os = "macos")]
   • The window_exclusion.rs resolve_window_ids function is also macOS-only

   This means on Windows, Cap's own windows (including the recording controls toolbar) can get captured in the recording, which would explain the black bar appearing in the editor playback.

   Current workaround: You can use the system tray icon to stop recordings instead of the floating toolbar. Right-click the Cap icon in your Windows system tray during recording for stop/pause controls.

   For a potential fix, this would require implementing window exclusion for Windows, likely using Windows APIs to identify and exclude Cap's windows from the screen capture. The relevant window types to exclude are defined in CapWindowId enum in windows.rs, including RecordingControls, Camera, and overlay windows.
4. daieven commented on Mar 10, 2026

   

   daieven

   on Mar 10, 2026

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   oh dear ,thank for reply me , i tests the other version v0.4.0.0 , the bug is not exits, i am a programer , i think you can copmpare your change and exclude where can cause this problem first ;

   i have a idear, the toolbar i hope can be disabled or can be move the left/right customer ,and support auto-side support the mouse click event ;

   at last , if you team not have a better solusion, i think your teams can hide this problem used other funtion to replace it ! thank you !