$ sudo apt-get update
$ sudo apt-get install deejayd-gstreamer 

deejayd-gstreamer is installed in your system.

Make ensure the deejayd-gstreamer package were installed using the commands given below,

$ sudo dpkg-query -l | grep deejayd-gstreamer *

You will get with deejayd-gstreamer package name, version, architecture and description in a table

deejayd-gstreamer package basic information: