HTML5調用攝像頭錄制視頻
不支持ie，ie下不支持webrtc，無法使用navigator.getUserMedia調用攝像頭
<!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;">
<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">打開攝像頭</button>
<button id="start-recording" disabled>開始錄制</button>
<button id="save-recording" disabled>保存</button>
<!--<a href="javascript:void(0)" onclick="send()">發送</a>-->
</section>
</article>
<script>
var mediaStream;
var recorderFile;
var stopRecordCallback;
var openBtn = document.getElementById("openCamera");
var startBtn = document.getElementById("start-recording");
var saveBtn = document.getElementById("save-recording");
openBtn.onclick = function() {
this.disabled = true;
startBtn.disabled=false;
openCamera();
};
startBtn.onclick = function() {
this.disabled = true;
startRecord();
};
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, false, function (err, stream) {
if (err) {
throw err;
} else {
// 通過 MediaRecorder 記錄獲取到的媒體流
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();
}
};
}
});
}
// 停止錄制
function stopRecord(callback) {
stopRecordCallback = callback;
// 終止錄制器
mediaRecorder.stop();
// 關閉媒體流
MediaUtils.closeStream(mediaStream);
}
var MediaUtils = {
/**
* 獲取用戶媒體設備(處理兼容的問題)
* @param videoEnable {boolean} - 是否啟用攝像頭
* @param audioEnable {boolean} - 是否啟用麥克風
* @param callback {Function} - 處理回調
*/
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'));
}
},
/**
* 關閉媒體流
* @param stream {MediaStream} - 需要關閉的流
*/
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(){
// 結束
stopRecord(function() {
alert("錄制成功!");
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.send(data);
}
</script>
</body>
</html>
fileSaver.js/* FileSaver.js * A saveAs() FileSaver implementation. * 1.3.2 * 2016-06-16 18:25:19 * * By Eli Grey, http://eligrey.com * License: MIT * See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md */ /*global self */ /*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */ /*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */ var saveAs = saveAs || (function(view) { "use strict"; // IE <10 is explicitly unsupported if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) { return; } var doc = view.document // only get URL when necessary in case Blob.js hasn't overridden it yet , get_URL = function() { return view.URL || view.webkitURL || view; } , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a") , can_use_save_link = "download" in save_link , click = function(node) { var event = new MouseEvent("click"); node.dispatchEvent(event); } , is_safari = /constructor/i.test(view.HTMLElement) || view.safari , is_chrome_ios =/CriOS\/[\d]+/.test(navigator.userAgent) , throw_outside = function(ex) { (view.setImmediate || view.setTimeout)(function() { throw ex; }, 0); } , force_saveable_type = "application/octet-stream" // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to , arbitrary_revoke_timeout = 1000 * 40 // in ms , revoke = function(file) { var revoker = function() { if (typeof file === "string") { // file is an object URL get_URL().revokeObjectURL(file); } else { // file is a File file.remove(); } }; setTimeout(revoker, arbitrary_revoke_timeout); } , dispatch = function(filesaver, event_types, event) { event_types = [].concat(event_types); var i = event_types.length; while (i--) { var listener = filesaver["on" + event_types[i]]; if (typeof listener === "function") { try { listener.call(filesaver, event || filesaver); } catch (ex) { throw_outside(ex); } } } } , auto_bom = function(blob) { // prepend BOM for UTF-8 XML and text/* types (including HTML) // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) { return new Blob([String.fromCharCode(0xFEFF), blob], {type: blob.type}); } return blob; } , FileSaver = function(blob, name, no_auto_bom) { if (!no_auto_bom) { blob = auto_bom(blob); } // First try a.download, then web filesystem, then object URLs var filesaver = this , type = blob.type , force = type === force_saveable_type , object_url , dispatch_all = function() { dispatch(filesaver, "writestart progress write writeend".split(" ")); } // on any filesys errors revert to saving with object URLs , fs_error = function() { if ((is_chrome_ios || (force && is_safari)) && view.FileReader) { // Safari doesn't allow downloading of blob urls var reader = new FileReader(); reader.onloadend = function() { var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, 'data:attachment/file;'); var popup = view.open(url, '_blank'); if(!popup) view.location.href = url; url=undefined; // release reference before dispatching filesaver.readyState = filesaver.DONE; dispatch_all(); }; reader.readAsDataURL(blob); filesaver.readyState = filesaver.INIT; return; } // don't create more object URLs than needed if (!object_url) { object_url = get_URL().createObjectURL(blob); } if (force) { view.location.href = object_url; } else { var opened = view.open(object_url, "_blank"); if (!opened) { // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html view.location.href = object_url; } } filesaver.readyState = filesaver.DONE; dispatch_all(); revoke(object_url); } ; filesaver.readyState = filesaver.INIT; if (can_use_save_link) { object_url = get_URL().createObjectURL(blob); setTimeout(function() { save_link.href = object_url; save_link.download = name; click(save_link); dispatch_all(); revoke(object_url); filesaver.readyState = filesaver.DONE; }); return; } fs_error(); } , FS_proto = FileSaver.prototype , saveAs = function(blob, name, no_auto_bom) { return new FileSaver(blob, name || blob.name || "download", no_auto_bom); } ; // IE 10+ (native saveAs) if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) { return function(blob, name, no_auto_bom) { name = name || blob.name || "download"; if (!no_auto_bom) { blob = auto_bom(blob); } return navigator.msSaveOrOpenBlob(blob, name); }; } FS_proto.abort = function(){}; FS_proto.readyState = FS_proto.INIT = 0; FS_proto.WRITING = 1; FS_proto.DONE = 2; FS_proto.error = FS_proto.onwritestart = FS_proto.onprogress = FS_proto.onwrite = FS_proto.onabort = FS_proto.onerror = FS_proto.onwriteend = null; return saveAs; }( typeof self !== "undefined" && self || typeof window !== "undefined" && window || this.content )); // `self` is undefined in Firefox for Android content script context // while `this` is nsIContentFrameMessageManager // with an attribute `content` that corresponds to the window if (typeof module !== "undefined" && module.exports) { module.exports.saveAs = saveAs; } else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) { define("FileSaver.js", function() { return saveAs; }); }
https://blog.csdn.net/mrzhangdulin/article/details/84560146