libass4 software package provides library for SSA/ASS subtitles rendering, 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 libass4
libass4 is installed in your system.
Make ensure the libass4 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libass4 *
You will get with libass4 package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Libraries |
| Package | libass4 |
| Version | 0.10.1-3ubuntu1 |
| Description | library for SSA/ASS subtitles rendering |
| Sub Section | libs |