kotlin-electron/electron.core/BrowserWindow/getMediaSourceId

getMediaSourceId

fun getMediaSourceId(): String(source)

Window id in the format of DesktopCapturerSource's id. For example "window:1324:0".

More precisely the format is window:id:other_id where id is HWND on Windows, CGWindowID (uint64_t) on macOS and Window (unsigned long) on Linux. other_id is used to identify web contents (tabs) so within the same top level window.