def KEYBOARDslider(Action, Type):
    """
    Check state change of keyboard slider.
    """

    if EnableKeyboardDetect == True:
        # keyboard slider: 'open to closed' state or 'closed to open' state
        KeyState = os.popen('cat /sys/devices/platform/gpio-switch/slide/state').read().strip('\n') 
        if KeyState == 'closed' or KeyState == 'open':
            SMSsend(SenderNumber,
                    'NOKIA N900\n' + \
                    '%s\n' % GetTime() + \
                    '-Keyboard-\n' + \
                    'Phone is being used:\n' + \
                    'keyboard is %s.' % KeyState,
                    'send SMS message keyboardslider used to')

gst-launch v4l2src device=/dev/video1 ! ffmpegcolorspace ! videobalance brightness=0.3 contrast=2 ! autovideosink