JavaScript实现视频共享

1.视频共享webrtc-master

index.html

<!DOCTYPE html>
<html>
<head><script type='text/javascript' src='https://cdn.scaledrone.com/scaledrone.min.js'></script><meta charset="utf-8"><meta name="viewport" content="width=device-width"><style>body {display: flex;height: 100vh;margin: 0;align-items: center;justify-content: center;padding: 0 50px;font-family: -apple-system, BlinkMacSystemFont, sans-serif;}video {max-width: calc(50% - 100px);margin: 0 50px;box-sizing: border-box;border-radius: 2px;padding: 0;box-shadow: rgba(156, 172, 172, 0.2) 0px 2px 2px, rgba(156, 172, 172, 0.2) 0px 4px 4px, rgba(156, 172, 172, 0.2) 0px 8px 8px, rgba(156, 172, 172, 0.2) 0px 16px 16px, rgba(156, 172, 172, 0.2) 0px 32px 32px, rgba(156, 172, 172, 0.2) 0px 64px 64px;}.copy {position: fixed;top: 10px;left: 50%;transform: translateX(-50%);font-size: 16px;color: rgba(0, 0, 0, 0.5);}</style>
</head>
<body><div class="copy">Send your URL to a friend to start a video call</div><video id="localVideo" autoplay muted></video><video id="remoteVideo" autoplay></video><script src="script.js"></script>
</body>
</html>

script.js

// Generate random room name if needed
if (!location.hash) {location.hash = Math.floor(Math.random() * 0xFFFFFF).toString(16);
}
const roomHash = location.hash.substring(1);// TODO: Replace with your own channel ID
const drone = new ScaleDrone('yiS12Ts5RdNhebyM');
// Room name needs to be prefixed with 'observable-'
const roomName = 'observable-' + roomHash;
const configuration = {iceServers: [{urls: 'stun:stun.l.google.com:19302'}]
};
let room;
let pc;function onSuccess() {};
function onError(error) {console.error(error);
};drone.on('open', error => {if (error) {return console.error(error);}room = drone.subscribe(roomName);room.on('open', error => {if (error) {onError(error);}});// We're connected to the room and received an array of 'members'// connected to the room (including us). Signaling server is ready.room.on('members', members => {console.log('MEMBERS', members);// If we are the second user to connect to the room we will be creating the offerconst isOfferer = members.length === 2;startWebRTC(isOfferer);});
});// Send signaling data via Scaledrone
function sendMessage(message) {drone.publish({room: roomName,message});
}function startWebRTC(isOfferer) {pc = new RTCPeerConnection(configuration);// 'onicecandidate' notifies us whenever an ICE agent needs to deliver a// message to the other peer through the signaling serverpc.onicecandidate = event => {if (event.candidate) {sendMessage({'candidate': event.candidate});}};// If user is offerer let the 'negotiationneeded' event create the offerif (isOfferer) {pc.onnegotiationneeded = () => {pc.createOffer().then(localDescCreated).catch(onError);}}// When a remote stream arrives display it in the #remoteVideo elementpc.ontrack = event => {const stream = event.streams[0];if (!remoteVideo.srcObject || remoteVideo.srcObject.id !== stream.id) {remoteVideo.srcObject = stream;}};navigator.mediaDevices.getUserMedia({audio: true,video: true,}).then(stream => {// Display your local video in #localVideo elementlocalVideo.srcObject = stream;// Add your stream to be sent to the conneting peerstream.getTracks().forEach(track => pc.addTrack(track, stream));}, onError);// Listen to signaling data from Scaledroneroom.on('data', (message, client) => {// Message was sent by usif (client.id === drone.clientId) {return;}if (message.sdp) {// This is called after receiving an offer or answer from another peerpc.setRemoteDescription(new RTCSessionDescription(message.sdp), () => {// When receiving an offer lets answer itif (pc.remoteDescription.type === 'offer') {pc.createAnswer().then(localDescCreated).catch(onError);}}, onError);} else if (message.candidate) {// Add the new ICE candidate to our connections remote descriptionpc.addIceCandidate(new RTCIceCandidate(message.candidate), onSuccess, onError);}});
}function localDescCreated(desc) {pc.setLocalDescription(desc,() => sendMessage({'sdp': pc.localDescription}),onError);
}

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