Ask Hacker News: How to setup my own video calls server

I am looking to setup my own secure video calls server home. So people at my home can connect to the server and call each other, and video talk.

Checking things i saw this http://www.voip-info.org/wiki/view/OpenVCS+-+Open+Source+Video+Conferencing+Server

and another alternative was looking at asterisk server, or a jabbar server.

As I was searching , found that the machines needs only client compatible with rfc 3261 meaning supporting sip protocol.

Anyone has any recommendation on a specific software? windows or linux based.

the most important thing its to be open source and free to personal use.