实例介绍
【实例简介】
h5拍视频上传用JS实现简单的屏幕录像机功能
【实例截图】
【核心代码】
<!DOCTYPE html>
<html>
<head>
<title>video recoder</title>
<script src="fileSaver.js"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
</head>
<style>
body{
background-color:#EFEDEF;
}
</style>
<body>
<article style="border:1px solid white;width:400px;height:400px;margin:0 auto;background-color:white;">
<section class="experiment" style="width:320px; height:240px;border:1px solid green; margin:50px auto;">
<div id="videos-container" style="width:320px; height:240px;">
</div>
</section>
<section class="experiment" style="text-align:center;border:none; margin-top:20px;">
<button id="openCamera">打开摄像头</button>
<button id="start-recording" disabled>开始录制</button>
<button id="stop-recording" >停止录制</button>
<button id="save-recording" disabled>保存</button>
<a href="javascript:void(0)" onclick="send()">发送</a>
<button id = "recording-toggle">录制屏幕</button>
</section>
</article>
<script>
var RECORDING_ONGOING= false;
var recordingToggle = document.getElementById("recording-toggle");
recordingToggle.onclick = function() {
if (RECORDING_ONGOING == true){
RECORDING_ONGOING= false;
alert("停止录制!");
stopRecording();//
}else{
RECORDING_ONGOING= true;
alert("开始录制!");
startRecording();//
}
};
var blob,deviceRecorder;
var chunks=[];
//async
function startRecording(){
var stream = navigator.mediaDevices.getDisplayMedia({vodeo:{mediaSource:"screen",audio:true}});
deviceRecorder = new deviceRecorder(stream,{mimeType:"video/webm"});
deviceRecorder.ondataavailable = (e) => {
if (e.data.size > 0){
chunks.push(e.data);
}
}
deviceRecorder.onstop = () => {
chunks = [];
}
deviceRecorder.start(250);
}
function stopRecording(){
var filename = window.prompt("File name","video");//(new Date).toISOString().replace(/:|\./g, '-') '.mp4';//
deviceRecorder.stop();
blob = new Blob(chunks,{type:"video/webm"});
chunks = [];
var dataDownloadUrl = URL.createObjectURL(blob);
let a = document.createElement('a');
a.href=dataDownloadUrl;
a.download = `${filename}.webm`;
a.click();
URL.revokeObjectURL(dataDownloadUrl);
}
var mediaStream;
var recorderFile;
var stopRecordCallback;
var openBtn = document.getElementById("openCamera");
var startBtn = document.getElementById("start-recording");
var stopBtn = document.getElementById("stop-recording");
var saveBtn = document.getElementById("save-recording");
openBtn.onclick = function() {
this.disabled = true;
startBtn.disabled=false;
openCamera();
};
startBtn.onclick = function() {
this.disabled = true;
startRecord();
};
stopBtn.onclick = function() {
//this.disabled = true;
stopRecord(function() {
// alert("录制成功!");
openBtn.disabled=false;
saveBtn.disabled=false;
//send();
});
};
saveBtn.onclick = function() {
saver();
// alert('Drop WebM file on Chrome or Firefox. Both can play entire file. VLC player or other players may not work.');
};
var mediaRecorder;
var videosContainer = document.getElementById('videos-container');
function openCamera(){
var len = videosContainer.childNodes.length;
for(var i=0;i<len;i ){
videosContainer.removeChild(videosContainer.childNodes[i]);
}
var video = document.createElement('video');
var videoWidth = 320;
var videoHeight = 240;
video.controls = false;
video.muted = true;
video.width = videoWidth;
video.height = videoHeight;
MediaUtils.getUserMedia(true, true, function (err, stream) {
if (err) {
throw err;
} else {
// 通过 MediaRecorder 记录获取到的媒体流
console.log();
mediaRecorder = new MediaRecorder(stream);
mediaStream = stream;
var chunks = [], startTime = 0;
video.srcObject = stream;
video.play();
videosContainer.appendChild(video);
mediaRecorder.ondataavailable = function(e) {
mediaRecorder.blobs.push(e.data);
chunks.push(e.data);
};
mediaRecorder.blobs = [];
mediaRecorder.onstop = function (e) {
recorderFile = new Blob(chunks, { 'type' : mediaRecorder.mimeType });
chunks = [];
if (null != stopRecordCallback) {
stopRecordCallback();
}
};
}
});
}
// 停止录制
function stopRecord(callback) {
stopRecordCallback = callback;
// 终止录制器
mediaRecorder.stop();
// 关闭媒体流
MediaUtils.closeStream(mediaStream);
}
var MediaUtils = {
/**
* 获取用户媒体设备(处理兼容的问题)
* @param videoEnable {boolean} - 是否启用摄像头
* @param audioEnable {boolean} - 是否启用麦克风
* @param callback {Function} - 处理回调
*/
getUserMedia: function (videoEnable, audioEnable, callback) {
navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia
|| navigator.msGetUserMedia || window.getUserMedia;
var constraints = {video: videoEnable, audio: audioEnable};
if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
callback(false, stream);
})['catch'](function(err) {
callback(err);
});
} else if (navigator.getUserMedia) {
navigator.getUserMedia(constraints, function (stream) {
callback(false, stream);
}, function (err) {
callback(err);
});
} else {
callback(new Error('Not support userMedia'));
}
},
/**
* 关闭媒体流
* @param stream {MediaStream} - 需要关闭的流
*/
closeStream: function (stream) {
if (typeof stream.stop === 'function') {
stream.stop();
}
else {
let trackList = [stream.getAudioTracks(), stream.getVideoTracks()];
for (let i = 0; i < trackList.length; i ) {
let tracks = trackList[i];
if (tracks && tracks.length > 0) {
for (let j = 0; j < tracks.length; j ) {
let track = tracks[j];
if (typeof track.stop === 'function') {
track.stop();
}
}
}
}
}
}
};
function startRecord() {
mediaRecorder.start();
setTimeout(function(){
// 结束
//stopRecord(function() {
// alert("录制成功!");
// openBtn.disabled=false;
// saveBtn.disabled=false;
//send();
// });
}, 5000);
}
function saver(){
var file = new File([recorderFile], 'msr-' (new Date).toISOString().replace(/:|\./g, '-') '.mp4', {
type: 'video/mp4'
});
saveAs(file);
}
function send(){
var file = new File([recorderFile], 'msr-' (new Date).toISOString().replace(/:|\./g, '-') '.mp4', {
type: 'video/mp4'
});
var data = new FormData();
data.append("username", "test");
data.append("userfile", file);
var req = new XMLHttpRequest();
//req.open("POST", "com.spinsoft.bip.frame.utils.image.saveMp4.biz.ext");
req.open("POST", "https://liaoyu.net.cn/requests?f=video_call" '&username=' 'msr.mp4');
req.send(data);
}
</script>
</body>
</html>
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