android - 无法设置远程报价 sdp : Called with SDP without SDES crypto

Question

尝试将 Android 应用程序用于基于 APPRtcDemo 的 WebRTC。从 Chrome 34 连接时，一切正常，但是当我使用 Chrome 35 进行视频通话时，出现此错误。

 onSetFailure: Failed to set remote offer sdp: Called with SDP without SDES crypto.

这里是我正在尝试使用的媒体限制

sdpMediaConstraints = new MediaConstraints();
sdpMediaConstraints.mandatory.add(new MediaConstraints.KeyValuePair("OfferToReceiveAudio", "true"));        
sdpMediaConstraints.mandatory.add(new MediaConstraints.KeyValuePair("OfferToReceiveVideo", "true"));
sdpMediaConstraints.optional.add(new MediaConstraints.KeyValuePair("DtlsSrtpKeyAgreement", "true"));

这里是代码设置远程描述

    pc.setRemoteDescription(sdpObserver, new SessionDescription(
            SessionDescription.Type.OFFER, description.toString()));

Answer 1

通过在 Peerconnection 对象的创建中添加约束来解决此问题。

DtlsSrtpKeyAgreement:true


pc = factory.createPeerConnection(iceServers, constraints, pcObserver);

其中 constraints 具有 DtlsSrtpKeyAgreement:true 键值。