AppleScript指令在FaceTime中设置网络摄像头

我需要使用AppleScript自动化FaceTime调用，但我的要求之一是选择一个特定的网络摄像头。我正在尝试使用以下代码：

tell application "System Events"
tell process "FaceTime"
    tell menu bar 1
        tell menu bar item "Video"
             click menu item "Webcam 520X"
        end tell
    end tell
end tell
end tell

但我得到了这个错误信息：

系统事件发生错误：无法获取进程“FaceTime”的菜单栏1的菜单栏项“视频”的菜单项“Webcam 520X”

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关于如何以正确的方式做这件事有什么建议吗？谢谢

在

菜单项

及其

菜单栏项

activate application "FaceTime"
tell application "System Events"
    tell process "FaceTime"
        tell menu bar 1
            tell menu bar item "Video"
                tell menu 1
                    click menu item "Webcam 520X"
                end tell
            end tell
        end tell
    end tell
end tell

或

activate application "FaceTime"
tell application "System Events"
    tell process "FaceTime"
        click menu item "Webcam 520X" of menu 1 of menu bar item "Video" of menu bar 1
    end tell
end tell