$ sudo apt-get update
$ sudo apt-get install libcogl-gst20 

libcogl-gst20 is installed in your system.

Make ensure the libcogl-gst20 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libcogl-gst20 *

You will get with libcogl-gst20 package name, version, architecture and description in a table

libcogl-gst20 package basic information: