$ sudo apt-get update
$ sudo apt-get install python-mediainfodll 

python-mediainfodll is installed in your system.

Make ensure the python-mediainfodll package were installed using the commands given below,

$ sudo dpkg-query -l | grep python-mediainfodll *

You will get with python-mediainfodll package name, version, architecture and description in a table

python-mediainfodll package basic information: