Unable to view image using image_view in ROS Indigo with rosberrypi_cam

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I have succesfully installed the rosberrypi_cam package following this page. After that when I execute the command

rosrun rosberrypi_cam rosberrypi_cam_node

the red light on camera becomes on, showing a message,

[ INFO] [1506259295.746458853]: using default calibration URL
[ INFO] [1506259295.747325311]: camera calibration URL: file:///home/pi/.ros/camera_info//rosberrypi_cam.yaml
[ INFO] [1506259295.747978384]: Unable to open camera calibration file [/home/pi/.ros/camera_info//rosberrypi_cam.yaml]
[ WARN] [1506259295.748239009]: Camera calibration file /home/pi/.ros/camera_info//rosberrypi_cam.yaml not found.

Now when I try to view an image using,

rosrun image_view image_view image:=/rosberrypi_cam/image_raw

I get the following message,

 [ INFO] [1506259415.296537089]: Using transport "raw"
(image_raw:1697): GLib-GObject-CRITICAL **: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Attempt to unlock mutex that was not locked
Aborted

Even while trying to calibrate the camera using cameraclibrator.py I am unable to calibrate it since the calibration window is opening as half black with all buttons disabled and without checkerboard. I am unable to understand the problem. Plesae help... Thank you.