I have Implemented voice calling using PJSIP libraries. All is working fine. Now I want to add Video calling in the sae project. I already have gone through the details provided on following links. https://trac.pjsip.org/repos/wiki/Getting-Started/iPhone#VideoSupport https://trac.pjsip.org/repos/browser/pjproject/trunk/pjsip-apps/src/pjsua/ios/ipjsua/ipjsuaAppDelegate.m http://trac.pjsip.org/repos/wiki/Video_Users_Guide I have also checked the files that comes with pjsip build for video calling i.e. vid_codec_test.c and vid_streamutil.c located at “/build/pjproject/src/pjsip-apps/src/samples” And I have made necessary changes required for videoCalling according to this guidelines. But still I am not able to make video calling. I am not able to understand whats exactly going wrong. Can somebody help me with any demo source code for video calling.?