How make video call with ejabberd ( like msn and skype ) ?
ejabberd doesn't handle audio/video natively. Audio and video is handled through the Jingle (XEP-0166), which is client-to-client.
If you want to place audio or video calls you should make sure both clients support Jingle through normal serivce discover means (see section 11 of XEP-0166). There aren't a lot of clients that do this right now, but Psi, at least, supports it in more recent builds.
You can try using Jingle Nodes (http://jinglenodes.org) in combination with SIP Communicator which supports Audio and Video via Jingle through any XMPP Server.
You can also try out quick with Openfire Jingle Nodes plugin.
来源：https://stackoverflow.com/questions/2461083/how-make-video-call-with-ejabberd