$ sudo apt-get update
$ sudo apt-get install libxine1-ffmpeg 

libxine1-ffmpeg is installed in your system.

Make ensure the libxine1-ffmpeg package were installed using the commands given below,

$ sudo dpkg-query -l | grep libxine1-ffmpeg *

You will get with libxine1-ffmpeg package name, version, architecture and description in a table

libxine1-ffmpeg package basic information: