mplayer-dbg software package provides debugging symbols for MPlayer, 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 mplayer-dbg
mplayer-dbg is installed in your system.
Make ensure the mplayer-dbg package were installed using the commands given below,
$ sudo dpkg-query -l | grep mplayer-dbg *
You will get with mplayer-dbg package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Debug packages |
| Package | mplayer-dbg |
| Version | 2:1.1+dfsg1-0ubuntu3 |
| Description | debugging symbols for MPlayer |
| Sub Section | debug |