I need to have a chat application in my client's website. The chat is one to one. Nothing like chat room. On clicking on a user,you can have video chat with him. To my reading, I will need to have FMS(Flash media server) and a good server.

What I want is a open source script or paid which i can integrate with my website,But I need a very good audio and video quality with bug free. I thought of going for dimdim or webex but i heard...