HTML5调用摄像头录制视频
<p>HTML5调用摄像头录制视频<br>不支持ie，ie下不支持webrtc，无法使用navigator.getUserMedia调用摄像头</p><pre class="prettyprint"><code class="has-numbering"><!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">打开摄像头</button>
<button id="start-recording" disabled>开始录制</button>
<button id="save-recording" disabled>保存</button>
<!--<a href="javascript:void(0)" onclick="send()">发送</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);
}
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 = ;
for (let i = 0; i < trackList.length; i++) {
let tracks = trackList;
if (tracks && tracks.length > 0) {
for (let j = 0; j < tracks.length; j++) {
let track = tracks;
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(, 'msr-' + (new Date).toISOString().replace(/:|\./g, '-') + '.mp4', {
type: 'video/mp4'
});
saveAs(file);
}
function send(){
var file = new File(, '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><br><br></code>fileSaver.js</pre>
<pre class="prettyprint"><code class="has-numbering">/* 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 \./.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];
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(, {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;
});
}</code><br><br><br><br><br>https://blog.csdn.net/mrzhangdulin/article/details/84560146</pre>
<p></p>
<p></audio></p><br><br>
来源：https://www.cnblogs.com/zhishaofei/p/12448857.html
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