webrtc 对等连接:无法创建答案 [英] webrtc peer connection: can not create an answer

问题描述

当我无法创建答案但连接状态已经是 have-remote-offer 时，我遇到了问题.

I have a problem when I can't create an answer but the connection state is already have-remote-offer.

代码:

pc.ontrack = function(evt) {

  // signaling state is have-remote-offer
  logEvent('REMOTE', 'signalingstate', pc.signalingState);

  pc.createAnswer() // error here
    .then((answer) => {
       localConnection.setLocalDescription(answer);
       logEvent('REMOTE', 'signalingstate', pc.signalingState);

       socket.emit('session_description', JSON.stringify({ desc: answer.toJSON() }));
  });
};

错误:

未捕获(承诺)DOMException:对等连接无法在除have-remote-offer 或 have-local-pranswer

Uncaught (in promise) DOMException: Peer Connection cannot create an answer in a state other than have-remote-offer or have-local-pranswer

有什么想法吗?

推荐答案

从 ontrack 调用 createAnswer 通常不会起作用.你会想从 setRemoteDescription .then()

calling createAnswer from ontrack is not going to work typically. You'll want to call it from the setRemoteDescription .then()

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