Traceback (most recent call last):
  File "./thread.py", line 30, in <module>
    conn_thread.run()
  File "/usr/lib/python2.7/threading.py", line 754, in run
    self.__target(*self.__args, **self.__kwargs)
  File "./thread.py", line 20, in accept_connections
    resize=(640,360))
  File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 1043, in start_recording
    camera_port, output_port = self._get_ports(True, splitter_port)
  File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 559, in _get_ports
    self._check_camera_open()
  File "/usr/lib/python2.7/dist-packages/picamera/camera.py", line 540, in _check_camera_open
    raise PiCameraClosed("Camera is closed")
picamera.exc.PiCameraClosed: Camera is closed