Sinch不支持swift中的视频通话

here is my code. I covert this code from objective c to swift from the sinch test` Giving the Objective-C part might be interesting to help but it's not supporting video call. when i accept the call audio is working fine. but video is not sending to the other device. please help me out if any one has the sample code for swift then send or try to fix it with this code.. thanks here is my code. I covert this code from object