最近在写vue2 项目其中有个需求是实时播放摄像头的视频，摄像头是 海康的设备，搞了很长时间终于监控视频出来了，记录一下，放置下次遇到。文章有点长，略显啰嗦请耐心看完。

测试

测试？测试什么？测试rtsp视频流能不能播放。

video mediaplay官网 即（VLC）

下载、安装完VLC后，打开VLC 点击媒体 -> 打开网络串流

将rtsp地址粘贴进去

不能播放的话，rtsp视频流地址有问题。
注意：视频可以播放也要查看视频的格式，如下

右击视频选择工具->编解码器信息

如果编解码是H264的，那么我的这种方法可以。如果是H265或者其他的话就要登录海康后台修改一下

以vue2 为例

新建 webrtcstreamer.js

在public文件夹下新建webrtcstreamer.js文件，直接复制粘贴，无需修改

var WebRtcStreamer = (function() {/** * Interface with WebRTC-streamer API* @constructor* @param {string} videoElement - id of the video element tag* @param {string} srvurl -  url of webrtc-streamer (default is current location)
*/
var WebRtcStreamer = function WebRtcStreamer (videoElement, srvurl) {if (typeof videoElement === "string") {this.videoElement = document.getElementById(videoElement);} else {this.videoElement = videoElement;}this.srvurl           = srvurl || location.protocol+"//"+window.location.hostname+":"+window.location.port;this.pc               = null;    this.mediaConstraints = { offerToReceiveAudio: true, offerToReceiveVideo: true };this.iceServers = null;this.earlyCandidates = [];
}WebRtcStreamer.prototype._handleHttpErrors = function (response) {if (!response.ok) {throw Error(response.statusText);}return response;
}/** * Connect a WebRTC Stream to videoElement * @param {string} videourl - id of WebRTC video stream* @param {string} audiourl - id of WebRTC audio stream* @param {string} options -  options of WebRTC call* @param {string} stream  -  local stream to send
*/
WebRtcStreamer.prototype.connect = function(videourl, audiourl, options, localstream) {this.disconnect();// getIceServers is not already receivedif (!this.iceServers) {console.log("Get IceServers");fetch(this.srvurl + "/api/getIceServers").then(this._handleHttpErrors).then( (response) => (response.json()) ).then( (response) =>  this.onReceiveGetIceServers(response, videourl, audiourl, options, localstream)).catch( (error) => this.onError("getIceServers " + error ))} else {this.onReceiveGetIceServers(this.iceServers, videourl, audiourl, options, localstream);}
}/** * Disconnect a WebRTC Stream and clear videoElement source
*/
WebRtcStreamer.prototype.disconnect = function() {		if (this.videoElement?.srcObject) {this.videoElement.srcObject.getTracks().forEach(track => {track.stop()this.videoElement.srcObject.removeTrack(track);});}if (this.pc) {fetch(this.srvurl + "/api/hangup?peerid=" + this.pc.peerid).then(this._handleHttpErrors).catch( (error) => this.onError("hangup " + error ))try {this.pc.close();}catch (e) {console.log ("Failure close peer connection:" + e);}this.pc = null;}
}    /*
* GetIceServers callback
*/
WebRtcStreamer.prototype.onReceiveGetIceServers = function(iceServers, videourl, audiourl, options, stream) {this.iceServers       = iceServers;this.pcConfig         = iceServers || {"iceServers": [] };try {            this.createPeerConnection();var callurl = this.srvurl + "/api/call?peerid=" + this.pc.peerid + "&url=" + encodeURIComponent(videourl);if (audiourl) {callurl += "&audiourl="+encodeURIComponent(audiourl);}if (options) {callurl += "&options="+encodeURIComponent(options);}if (stream) {this.pc.addStream(stream);}// clear early candidatesthis.earlyCandidates.length = 0;// create Offerthis.pc.createOffer(this.mediaConstraints).then((sessionDescription) => {console.log("Create offer:" + JSON.stringify(sessionDescription));this.pc.setLocalDescription(sessionDescription).then(() => {fetch(callurl, { method: "POST", body: JSON.stringify(sessionDescription) }).then(this._handleHttpErrors).then( (response) => (response.json()) ).catch( (error) => this.onError("call " + error )).then( (response) =>  this.onReceiveCall(response) ).catch( (error) => this.onError("call " + error ))}, (error) => {console.log ("setLocalDescription error:" + JSON.stringify(error)); });}, (error) => { alert("Create offer error:" + JSON.stringify(error));});} catch (e) {this.disconnect();alert("connect error: " + e);}	    
}WebRtcStreamer.prototype.getIceCandidate = function() {fetch(this.srvurl + "/api/getIceCandidate?peerid=" + this.pc.peerid).then(this._handleHttpErrors).then( (response) => (response.json()) ).then( (response) =>  this.onReceiveCandidate(response)).catch( (error) => this.onError("getIceCandidate " + error ))
}/*
* create RTCPeerConnection 
*/
WebRtcStreamer.prototype.createPeerConnection = function() {console.log("createPeerConnection  config: " + JSON.stringify(this.pcConfig));this.pc = new RTCPeerConnection(this.pcConfig);var pc = this.pc;pc.peerid = Math.random();		pc.onicecandidate = (evt) => this.onIceCandidate(evt);pc.onaddstream    = (evt) => this.onAddStream(evt);pc.oniceconnectionstatechange = (evt) => {  console.log("oniceconnectionstatechange  state: " + pc.iceConnectionState);if (this.videoElement) {if (pc.iceConnectionState === "connected") {this.videoElement.style.opacity = "1.0";}			else if (pc.iceConnectionState === "disconnected") {this.videoElement.style.opacity = "0.25";}			else if ( (pc.iceConnectionState === "failed") || (pc.iceConnectionState === "closed") )  {this.videoElement.style.opacity = "0.5";} else if (pc.iceConnectionState === "new") {this.getIceCandidate();}}}pc.ondatachannel = function(evt) {  console.log("remote datachannel created:"+JSON.stringify(evt));evt.channel.onopen = function () {console.log("remote datachannel open");this.send("remote channel openned");}evt.channel.onmessage = function (event) {console.log("remote datachannel recv:"+JSON.stringify(event.data));}}pc.onicegatheringstatechange = function() {if (pc.iceGatheringState === "complete") {const recvs = pc.getReceivers();recvs.forEach((recv) => {if (recv.track && recv.track.kind === "video") {console.log("codecs:" + JSON.stringify(recv.getParameters().codecs))}});}}try {var dataChannel = pc.createDataChannel("ClientDataChannel");dataChannel.onopen = function() {console.log("local datachannel open");this.send("local channel openned");}dataChannel.onmessage = function(evt) {console.log("local datachannel recv:"+JSON.stringify(evt.data));}} catch (e) {console.log("Cannor create datachannel error: " + e);}	console.log("Created RTCPeerConnnection with config: " + JSON.stringify(this.pcConfig) );return pc;
}/*
* RTCPeerConnection IceCandidate callback
*/
WebRtcStreamer.prototype.onIceCandidate = function (event) {if (event.candidate) {if (this.pc.currentRemoteDescription)  {this.addIceCandidate(this.pc.peerid, event.candidate);					} else {this.earlyCandidates.push(event.candidate);}} else {console.log("End of candidates.");}
}WebRtcStreamer.prototype.addIceCandidate = function(peerid, candidate) {fetch(this.srvurl + "/api/addIceCandidate?peerid="+peerid, { method: "POST", body: JSON.stringify(candidate) }).then(this._handleHttpErrors).then( (response) => (response.json()) ).then( (response) =>  {console.log("addIceCandidate ok:" + response)}).catch( (error) => this.onError("addIceCandidate " + error ))
}/*
* RTCPeerConnection AddTrack callback
*/
WebRtcStreamer.prototype.onAddStream = function(event) {console.log("Remote track added:" +  JSON.stringify(event));this.videoElement.srcObject = event.stream;var promise = this.videoElement.play();if (promise !== undefined) {promise.catch((error) => {console.warn("error:"+error);this.videoElement.setAttribute("controls", true);});}
}/*
* AJAX /call callback
*/
WebRtcStreamer.prototype.onReceiveCall = function(dataJson) {console.log("offer: " + JSON.stringify(dataJson));var descr = new RTCSessionDescription(dataJson);this.pc.setRemoteDescription(descr).then(() =>  { console.log ("setRemoteDescription ok");while (this.earlyCandidates.length) {var candidate = this.earlyCandidates.shift();this.addIceCandidate(this.pc.peerid, candidate);				}this.getIceCandidate()}, (error) => { console.log ("setRemoteDescription error:" + JSON.stringify(error)); });
}	/*
* AJAX /getIceCandidate callback
*/
WebRtcStreamer.prototype.onReceiveCandidate = function(dataJson) {console.log("candidate: " + JSON.stringify(dataJson));if (dataJson) {for (var i=0; i<dataJson.length; i++) {var candidate = new RTCIceCandidate(dataJson[i]);console.log("Adding ICE candidate :" + JSON.stringify(candidate) );this.pc.addIceCandidate(candidate).then( () =>      { console.log ("addIceCandidate OK"); }, (error) => { console.log ("addIceCandidate error:" + JSON.stringify(error)); } );}this.pc.addIceCandidate();}
}/*
* AJAX callback for Error
*/
WebRtcStreamer.prototype.onError = function(status) {console.log("onError:" + status);
}return WebRtcStreamer;
})();if (typeof window !== 'undefined' && typeof window.document !== 'undefined') {window.WebRtcStreamer = WebRtcStreamer;
}
if (typeof module !== 'undefined' && typeof module.exports !== 'undefined') {module.exports = WebRtcStreamer;
}

下载webrtc-streamer

资源在最上面

下载完后解压，打开，启动

出现下面这个页面就是启动成功了，留意这里的端口号，就是我选出来的部分，一般都是默认8000，不排除其他情况

检查一下也没用启动成功，http://127.0.0.1:8000/ 粘贴到浏览器地址栏回车查看，启动成功能看到电脑当前页面（这里的8000就是启动的端口号，启动的是多少就访问多少）

video.vue

新建video.js （位置自己决定，后面要引入的）

video.js中要修改两个地方，第一个是引入webrtcstreamer.js路径，第二个地方是ip地址要要修改为自己的ip加上启动的端口号（即上面的8000），不知道电脑ip地址的看下面一行

怎么查看自己的ip地址打开cmd 黑窗口（即dos窗口），输入ipconfig回车，在里面找到 IPv4 地址 就是了

<template><div id="video-contianer"><videoclass="video"ref="video"preload="auto"autoplay="autoplay"mutedwidth="600"height="400"/><divclass="mask"@click="handleClickVideo":class="{ 'active-video-border': selectStatus }"></div></div>
</template><script>
import WebRtcStreamer from "../../public/webrtcstreamer";export default {name: "videoCom",props: {rtsp: {type: String,required: true,},isOn: {type: Boolean,default: false,},spareId: {type: Number,},selectStatus: {type: Boolean,default: false,},},data() {return {socket: null,result: null, // 返回值pic: null,webRtcServer: null,clickCount: 0, // 用来计数点击次数};},watch: {rtsp() {// do somethingconsole.log(this.rtsp);this.webRtcServer.disconnect();this.initVideo();},},destroyed() {this.webRtcServer.disconnect();},beforeCreate() {window.onbeforeunload = () => {this.webRtcServer.disconnect();};},created() {},mounted() {this.initVideo();},methods: {initVideo() {try {//连接后端的IP地址和端口this.webRtcServer = new WebRtcStreamer(this.$refs.video,`http://192.168.0.24:8000`);//向后端发送rtsp地址this.webRtcServer.connect(this.rtsp);} catch (error) {console.log(error);}},/* 处理双击 单机 */dbClick() {this.clickCount++;if (this.clickCount === 2) {this.btnFull(); // 双击全屏this.clickCount = 0;}setTimeout(() => {if (this.clickCount === 1) {this.clickCount = 0;}}, 250);},/* 视频全屏 */btnFull() {const elVideo = this.$refs.video;if (elVideo.webkitRequestFullScreen) {elVideo.webkitRequestFullScreen();} else if (elVideo.mozRequestFullScreen) {elVideo.mozRequestFullScreen();} else if (elVideo.requestFullscreen) {elVideo.requestFullscreen();}},/* ison用来判断是否需要更换视频流dbclick函数用来双击放大全屏方法*/handleClickVideo() {if (this.isOn) {this.$emit("selectVideo", this.spareId);this.dbClick();} else {this.btnFull();}},},
};
</script><style scoped lang="scss">
.active-video-border {border: 2px salmon solid;
}
#video-contianer {position: relative;// width: 100%;// height: 100%;.video {// width: 100%;// height: 100%;// object-fit: cover;}.mask {position: absolute;top: 0;left: 0;width: 100%;height: 100%;cursor: pointer;}
}
</style>

页面中调用

在页面中引入video.vue，并注册。将rtsp视频地址传过去就好了，要显示几个视频就调用几次

回到页面看，rtsp视频已经可以播放了