startStreamingVideo

private fun startStreamingVideo() {
        //creating local mediastream
        val mediaStream = factory?.createLocalMediaStream("ARDAMS")
        mediaStream?.apply {
            addTrack(localAudioTrack)
            addTrack(localVideoTrack)
            localPeerConnection?.addStream(this)
        }
        
        val sdpMediaConstraints = MediaConstraints()
        sdpMediaConstraints.apply {
            mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveAudio", "true"))
            mandatory.add(MediaConstraints.KeyValuePair("OfferToReceiveVideo", "true"))
        }
        localPeerConnection?.createOffer(object : SimpleSdpObserver() {
            override fun onCreateSuccess(sessionDescription: SessionDescription) {
                Log.d(TAG, "onCreateSuccess: ")
                localPeerConnection?.setLocalDescription(SimpleSdpObserver(), sessionDescription)
                remotePeerConnection?.setRemoteDescription(SimpleSdpObserver(), sessionDescription)

                remotePeerConnection?.createAnswer(object : SimpleSdpObserver() {
                    override fun onCreateSuccess(sessionDescription: SessionDescription) {
                        localPeerConnection?.setRemoteDescription(SimpleSdpObserver(), sessionDescription)
                        remotePeerConnection?.setLocalDescription(SimpleSdpObserver(), sessionDescription)
                    }
                }, sdpMediaConstraints)
            }
        }, sdpMediaConstraints)
    }