iOS 发起视频聊天，对方接受后报错，errorCode = EMErrorCallConnectFailure

但是如果是安卓端发起的视频聊天，iOS 接受就可以正常视频聊天
 
以下是发起视频，对方接受后，ICallManagerDelegate返回的一些错误信息
(EMCallSessionStatus) _status = eCallSessionStatusDisconnected
(EMCallStatusChangedReason) reason = eCallReasonHangup
(EMErrorType) errorCode = EMErrorCallConnectFailure
_description:Connect remote failure.
 
求大大指点！！