This is how I installed on Ubuntu 9.04 Jaunty Jackalope.
Removed existing Pidgin:
sudo aptitude purge pidgin pidgin-data libpurple0 libpurple-binAdd the following repositories to Software sources:
deb http://ppa.launchpad.net/pidgin-developers/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/pidgin-developers/ppa/ubuntu jaunty main
Add signing keys:sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A1F196A8Update and install:
sudo aptitude updateFor audio/video calls:
sudo aptitude install pidgin
Double click the buddy andIf the buddy does not have audio/video facility the options will be greyed out.
Click on Conversation/Media in the new window.