请尝试这样的事情:(代码末尾有解释)
var btnShareYourCamera = document.querySelector('#share-your-camera');
var localVideo = document.querySelector('#local-video');
var remoteVideo = document.querySelector('#remote-video');
var websocket = new WebSocket('wss://path-to-server:port/');
websocket.onmessage = function(event) {
var data = JSON.parse(event.data);
if (data.sdp) {
if (data.sdp.type === 'offer') {
getUserMedia(function(video_stream) {
localVideo.srcObject = video_stream;
answererPeer(new RTCSessionDescription(data.sdp), video_stream);
});
}
if (data.sdp.type === 'answer') {
offerer.setRemoteDescription(new RTCSessionDescription(data.sdp));
}
}
if (data.candidate) {
addIceCandidate((offerer || answerer), new RTCIceCandidate(data.candidate));
}
};
var iceTransportPolicy = 'all';
var iceTransportLimitation = 'udp';
function addIceCandidate(peer, candidate) {
if (iceTransportLimitation === 'tcp') {
if (candidate.candidate.toLowerCase().indexOf('tcp') === -1) {
return; // ignore UDP
}
}
peer.addIceCandidate(candidate);
}
var offerer, answerer;
var iceServers = {
iceServers: [{
'urls': [
'stun:stun.l.google.com:19302',
'stun:stun1.l.google.com:19302',
'stun:stun2.l.google.com:19302',
'stun:stun.l.google.com:19302?transport=udp',
]
}],
iceTransportPolicy: iceTransportPolicy,
rtcpMuxPolicy: 'require',
bundlePolicy: 'max-bundle'
};
// https://https;//cdn.webrtc-experiment.com/IceServersHandler.js
if (typeof IceServersHandler !== 'undefined') {
iceServers.iceServers = IceServersHandler.getIceServers();
}
var mediaConstraints = {
OfferToReceiveAudio: true,
OfferToReceiveVideo: true
};
/* offerer */
function offererPeer(video_stream) {
offerer = new RTCPeerConnection(iceServers);
offerer.idx = 1;
video_stream.getTracks().forEach(function(track) {
offerer.addTrack(track, video_stream);
});
offerer.ontrack = function(event) {
remoteVideo.srcObject = event.streams[0];
};
offerer.onicecandidate = function(event) {
if (!event || !event.candidate) return;
websocket.send(JSON.stringify({
candidate: event.candidate
}));
};
offerer.createOffer(mediaConstraints).then(function(offer) {
offerer.setLocalDescription(offer).then(function() {
websocket.send(JSON.stringify({
sdp: offer
}));
});
});
}
/* answerer */
function answererPeer(offer, video_stream) {
answerer = new RTCPeerConnection(iceServers);
answerer.idx = 2;
video_stream.getTracks().forEach(function(track) {
answerer.addTrack(track, video_stream);
});
answerer.ontrack = function(event) {
remoteVideo.srcObject = event.streams[0];
};
answerer.onicecandidate = function(event) {
if (!event || !event.candidate) return;
websocket.send(JSON.stringify({
candidate: event.candidate
}));
};
answerer.setRemoteDescription(offer).then(function() {
answerer.createAnswer(mediaConstraints).then(function(answer) {
answerer.setLocalDescription(answer).then(function() {
websocket.send(JSON.stringify({
sdp: answer
}));
});
});
});
}
var video_constraints = {
mandatory: {},
optional: []
};
function getUserMedia(successCallback) {
function errorCallback(e) {
alert(JSON.stringify(e, null, '\t'));
}
var mediaConstraints = {
video: true,
audio: true
};
navigator.mediaDevices.getUserMedia(mediaConstraints).then(successCallback).catch(errorCallback);
}
btnShareYourCamera.onclick = function() {
getUserMedia(function(video_stream) {
localVideo.srcObject = video_stream;
offererPeer(video_stream);
});
};
- 您必须使用附加流
peer.addTrack
正如你在上面的例子中看到的
- 您必须使用接收远程流
peer.ontrack
正如你在上面的例子中看到的
即使用addTrack
连接相机并使用ontrack
接收远程摄像头。
您绝不能使用以下方式发送流dataChannel.send
。两者是完全不同的协议。 AMediaStream
必须使用 RTP 共享;不是 SCTP。仅当您拨打电话时才使用 RTPpeer.addTrack
附加相机流的方法。
此过程发生在您打开或加入房间之前。
在这里查看单页演示:https://www.webrtc-experiment.com/getStats/ https://www.webrtc-experiment.com/getStats/
上述代码片段的 HTML:
<button id="share-your-camera"></button>
<video id="local-video" controls autoplay playsinline></video>
<video id="remote-video" controls autoplay playsinline></video>