title: How to add RTP (Audio/Video stream) to an initiated SIP call (using JAIN)
body: <p>I have devised a piece of code to dial a SIP client (linphone) using JAIN SIP but i want to add video/audio streams to complete the task of a video call.</p>
  
  <p>-I want it to be in the same class
  -And to make the code simple since i am using it in Raspberry Pi</p>
  
  <p>Thanks in advance.</p>