I'm trying develop VoIP app which will connect SIP and RTP protocol and will have a function which in case (for example too low capacity) hang a connection, change RTP codec and continue connection. For SIP I used android sip demo example and this work pretty well. For RTP I thought about android.net.rtp but I didn’t find a method which can measure parameters of connections. Can you suggest a RTP library which is easy to use, it can be integrated with android.net.sip and allow to measure parameters of RTP transmissions?