$ sudo apt-get update
$ sudo apt-get install libtheora-dbg 

libtheora-dbg is installed in your system.

Make ensure the libtheora-dbg package were installed using the commands given below,

$ sudo dpkg-query -l | grep libtheora-dbg *

You will get with libtheora-dbg package name, version, architecture and description in a table

libtheora-dbg package basic information: