在firefox v60.0.2中创建sdf提供错误(WebRTC,Firefox)

时间:2018-06-17 01:00:16

标签: javascript html firefox webrtc

我在触发RTCPeerConnection.createOffer()时遇到下一个错误:

抛出:DOMException
代码:11
columnNumber :0
数据:null
文件名:""
lineNumber :0
消息:"如果没有有效的收发器,则无法创建优惠。"
名称:" InvalidStateError"
结果:2152923147
堆叠:""
__ proto __ :DOMExceptionPrototype {name:Getter,message:Getter,INDEX_SIZE_ERR:1,...} index.js:176:3

接下来是完整的代码片段(错误由行触发: pc.createOffer()。然后(... ):



let pc = {};
let localStream = {};
const btnStart = document.querySelector("button[id='btnstart']");
let localVideoDisplay = document.getElementById('vOwn');

btnStart.addEventListener("click",(e)=>{

		pc = new RTCPeerConnection();
		pc.onicecandidate = (event)=>{
			console.log(event);
		}
		/*
			It captures local media
		*/
		navigator.mediaDevices.getUserMedia({ audio: 1, video: 1 }).then((stream)=>{
			localStream = stream;
			localVideoDisplay.srcObject = localStream;
		}).catch((err)=>{
			  console.log(err);
		});
		/* 
			It creates sdpOffer 
		*/
		pc.createOffer().then((rtcSession)=>{
			console.log(rtcSession);
		}).catch((error)=>{
			console.log(error);
		});
	});

<button id="btnstart">Start</button>
<video id="vOwn" autoplay></video>
&#13;
&#13;
&#13;

代码在Chrome(移动和桌面)和Safari(移动版v11.3.1和桌面版v11.0.2)上完美运行我的问题是:这是一个firefox错误还是我做错了什么?

1 个答案:

答案 0 :(得分:3)

在添加任何流或创建数据通道之前,您正在调用pc.createOffer()

这通常不是你想要的。试试这个:

navigator.mediaDevices.getUserMedia({ audio: 1, video: 1 }).then((stream)=>{
    localStream = stream;
    localVideoDisplay.srcObject = localStream;
    stream.getTracks().forEach((t) => pc.addTrack(t, stream));
    return pc.createOffer()
})
.then((rtcSession)=>{
    console.log(rtcSession);
}).catch((error)=>{
    console.log(error);
});