Using cameracalibrate and cameraundistort gstreamer elemets to build gstreamer pipeline

As i read in the documentation cameracalibrate and cameraundistort are elements that belong to opencv plugin and wich we can use directly to create our own pipelines. I was trying to build and run the following pipeline : gst-launch-1.0 filesrc location=EmaginResult.jpg ! video/x-raw,width= 399,height=316,format=BGRx ! cameracalibrate board-height= 7 board-width= 9 ! autovid eosink , but it doesn't give me any result. The EmaginResult.jpg is a distorted image wich i am trying to undistort.

I had tried ,before building my own pipeline , to run the two pipelines examples given in gstreamer documentation :

gst-launch-1.0 -v v4l2src ! videoconvert ! cameraundistort settings="???" ! autovideosink

gst-launch-1.0 -v v4l2src ! videoconvert ! cameraundistort ! cameracalibrate ! autovideosink it didn't show any result as well.

I am beginner in gstreamer, could someone please guide me and tell me what i have missed so as not to have my image undistorted.

I will be also thankful if someone could explain how to use these elements or plugins. Thanks in advance.