libavfilter-extra-3 software package provides Libav filter library (transitional package), you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libavfilter-extra-3
libavfilter-extra-3 is installed in your system.
Make ensure the libavfilter-extra-3 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libavfilter-extra-3 *
You will get with libavfilter-extra-3 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Old Libraries |
| Package | libavfilter-extra-3 |
| Version | 6:9.18-0ubuntu0.14.04.1 |
| Description | Libav filter library (transitional package) |
| Sub Section | oldlibs |