$ sudo apt-get update
$ sudo apt-get install libvpx1 

libvpx1 is installed in your system.

Make ensure the libvpx1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libvpx1 *

You will get with libvpx1 package name, version, architecture and description in a table

libvpx1 package basic information: