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audio-plus-screen-recording.html
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<!--
> Muaz Khan - www.MuazKhan.com
> MIT License - www.WebRTC-Experiment.com/licence
> Documentation - github.com/muaz-khan/Ffmpeg.js
-->
<!DOCTYPE html>
<html lang="en">
<head>
<title>Record audio+screen and get mp4!</title>
<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">
<link rel="author" type="text/html" href="https://plus.google.com/+MuazKhan">
<meta name="author" content="Muaz Khan">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<link rel="stylesheet" href="https://cdn.webrtc-experiment.com/style.css">
<style>
video {
vertical-align: bottom;
width: 300px;
}
input {
border: 1px solid #d9d9d9;
border-radius: 1px;
font-size: 2em;
margin: .2em;
width: 30%;
}
p, .inner { padding: 1em; }
li {
border-bottom: 1px solid rgb(189, 189, 189);
border-left: 1px solid rgb(189, 189, 189);
padding: .5em;
}
label {
display: inline-block;
width: 8em;
}
</style>
<script>
document.createElement('article');
document.createElement('footer');
</script>
<!-- script used for audio/video/gif recording -->
<script src="https://cdn.webrtc-experiment.com/RecordRTC.js"> </script>
<script src="https://cdn.webrtc-experiment.com/getScreenId.js"></script>
<script src="https://webrtc.github.io/adapter/adapter-latest.js"></script>
</head>
<body>
<article>
<header style="text-align: center;">
<h1>
Record audio+screen and get mp4!
</h1>
<p>
<a href="https://www.webrtc-experiment.com/ffmpeg/">HOME</a>
<span> © </span>
<a href="http://www.MuazKhan.com/" target="_blank">Muaz Khan</a>
.
<a href="http://twitter.com/WebRTCWeb" target="_blank" title="Twitter profile for WebRTC Experiments">@WebRTCWeb</a>
.
<a href="https://github.com/muaz-khan?tab=repositories" target="_blank" title="Github Profile">Github</a>
.
<a href="https://github.com/muaz-khan/Ffmpeg.js/issues?state=open" target="_blank">Latest issues</a>
.
<a href="https://github.com/muaz-khan/Ffmpeg.js/commits/master" target="_blank">What's New?</a>
</p>
</header>
<div class="github-stargazers"></div>
<section class="experiment">
<h2 class="header">Logs</h2>
<ol id="logs-preview">
<li>
<a href="https://www.webrtc-experiment.com/RecordRTC/">RecordRTC</a> experiment converting Merging WebM/WAV into mp4 inside the browser!
</li>
<li>
<strong>ffmpeg-asm.js</strong> is integrated with <a href="https://www.webrtc-experiment.com/RecordRTC/">RecordRTC</a> by <strong>Gregory McGee</strong>!
</li>
</ol>
</section>
<section class="experiment">
<h2 class="header">Record audio/screen and convert/merge into "mp4"!</h2>
<div class="inner">
<button id="record-video">Record</button>
<button id="stop-recording-video" disabled>Stop</button>
<br>
<video id="video-preview" controls muted></video>
<br>
</div>
</section>
<script>
var recordVideo, recordAudio;
var videoPreview = document.getElementById('video-preview');
var inner = document.querySelector('.inner');
var videoFile = !!navigator.mozGetUserMedia ? 'video.gif' : 'video.webm';
var isFirefox = !!navigator.mozGetUserMedia;
function captureScreenAndAudio(callback) {
getScreenId(function(error, sourceId, screenConstraints) {
if (error === 'not-installed') {
document.write('<h1><a target="_blank" href="https://chrome.google.com/webstore/detail/screen-capturing/ajhifddimkapgcifgcodmmfdlknahffk">Please install this chrome extension then reload the page.</a></h1>');
}
if (error === 'permission-denied') {
alert('Screen capturing permission is denied.');
}
if (error === 'installed-disabled') {
alert('Please enable chrome screen capturing extension.');
}
if (error) {
config.onMediaCapturingFailed(error);
return;
}
// first getUserMedia for screen
// note: Firefox supports both audio+screen capturing in single getUserMedia
navigator.getUserMedia(screenConstraints, function(screenStream) {
// second getUserMedia for audio
navigator.getUserMedia({
audio: true
}, function(audioStream) {
callback(screenStream, audioStream);
}, function(error) {
alert(JSON.stringify(error, null, '\t'));
});
}, function(error) {
alert(JSON.stringify(error, null, '\t'));
});
});
}
document.querySelector('#record-video').onclick = function() {
this.disabled = true;
captureScreenAndAudio(function(screenStream, audioStream) {
screenStream.onended = function() {
document.querySelector('#stop-recording-video').onclick();
};
videoPreview.style.position = 'absolute';
videoPreview.style.top = 0;
videoPreview.style.left = 0;
videoPreview.style['object-fill'] = 'fill';
videoPreview.style.width = '100%';
videoPreview.style.height = '100%';
videoPreview.style.zIndex = 9999999999999;
videoPreview.srcObject = screenStream;
videoPreview.play();
recordAudio = RecordRTC(audioStream, {
type: isFirefox ? 'video' : 'audio',
// bufferSize: 16384,
recorderType: isFirefox ? MediaStreamRecorder : StereoAudioRecorder // force WebAudio for all browsers even for Firefox/MS-Edge
});
recordAudio.stream = audioStream;
// todo: Firefox supports MediaRecorder API
// however it will record both audio/video tracks into single WebM
// Need to construct a MediaStream that is having no audio tracks
recordVideo = RecordRTC(screenStream, {
type: 'video',
recorderType: isFirefox ? MediaStreamRecorder : WhammyRecorder,
canvas: {
width: 360,
height: 240
},
video: videoPreview,
frameInterval: 90 // 30 milliseconds
});
recordVideo.stream = screenStream;
recordVideo.initRecorder(function() {
recordAudio.initRecorder(function() {
recordVideo.startRecording();
recordAudio.startRecording();
});
});
});
document.querySelector('#stop-recording-video').disabled = false;
};
document.querySelector('#stop-recording-video').onclick = function() {
if(!recordVideo.stream) return;
this.disabled = true;
recordAudio.stopRecording(function() {
recordVideo.stopRecording(function() {
recordVideo.stream.onended = function() {};
recordVideo.stream.stop();
recordAudio.stream.stop();
recordVideo.stream = null;
recordAudio.stream = null;
videoPreview.style.position = '';
videoPreview.style.top = 'auto';
videoPreview.style.left = 'auto';
videoPreview.style['object-fill'] = 'initial';
videoPreview.style.width = 360;
videoPreview.style.height = 240;
videoPreview.style.zIndex = 9999999999999;
convertStreams(recordVideo.blob, recordAudio.blob);
log('<a href="'+ workerPath +'" download="ffmpeg-asm.js">ffmpeg-asm.js</a> file download started. It is about 18MB in size; please be patient!');
});
});
};
var workerPath = 'https://archive.org/download/ffmpeg_asm/ffmpeg_asm.js';
if(document.domain == 'localhost') {
workerPath = location.href.replace(location.href.split('/').pop(), '') + 'ffmpeg_asm.js';
}
function processInWebWorker() {
var blob = URL.createObjectURL(new Blob(['importScripts("' + workerPath + '");var now = Date.now;function print(text) {postMessage({"type" : "stdout","data" : text});};onmessage = function(event) {var message = event.data;if (message.type === "command") {var Module = {print: print,printErr: print,files: message.files || [],arguments: message.arguments || [],TOTAL_MEMORY: message.TOTAL_MEMORY || false};postMessage({"type" : "start","data" : Module.arguments.join(" ")});postMessage({"type" : "stdout","data" : "Received command: " +Module.arguments.join(" ") +((Module.TOTAL_MEMORY) ? ". Processing with " + Module.TOTAL_MEMORY + " bits." : "")});var time = now();var result = ffmpeg_run(Module);var totalTime = now() - time;postMessage({"type" : "stdout","data" : "Finished processing (took " + totalTime + "ms)"});postMessage({"type" : "done","data" : result,"time" : totalTime});}};postMessage({"type" : "ready"});'], {
type: 'application/javascript'
}));
var worker = new Worker(blob);
URL.revokeObjectURL(blob);
return worker;
}
var worker;
function convertStreams(videoBlob, audioBlob) {
var vab;
var aab;
var buffersReady;
var workerReady;
var posted = false;
var fileReader1 = new FileReader();
fileReader1.onload = function() {
vab = this.result;
if (aab) buffersReady = true;
if (buffersReady && workerReady && !posted) postMessage();
};
var fileReader2 = new FileReader();
fileReader2.onload = function() {
aab = this.result;
if (vab) buffersReady = true;
if (buffersReady && workerReady && !posted) postMessage();
};
fileReader1.readAsArrayBuffer(videoBlob);
fileReader2.readAsArrayBuffer(audioBlob);
if (!worker) {
worker = processInWebWorker();
}
worker.onmessage = function(event) {
var message = event.data;
if (message.type == "ready") {
log('<a href="'+ workerPath +'" download="ffmpeg-asm.js">ffmpeg-asm.js</a> file has been loaded.');
workerReady = true;
if (buffersReady)
postMessage();
} else if (message.type == "stdout") {
log(message.data);
} else if (message.type == "start") {
log('<a href="'+ workerPath +'" download="ffmpeg-asm.js">ffmpeg-asm.js</a> file received ffmpeg command.');
} else if (message.type == "done") {
log(JSON.stringify(message));
var result = message.data[0];
log(JSON.stringify(result));
var blob = new Blob([result.data], {
type: 'video/mp4'
});
log(JSON.stringify(blob));
PostBlob(blob);
}
};
var postMessage = function() {
posted = true;
worker.postMessage({
type: 'command',
arguments: [
'-i', videoFile,
'-i', 'audio.wav',
'-c:v', 'mpeg4',
'-c:a', 'vorbis',
'-b:v', '48k',
'-b:a', '8k',
'-strict', 'experimental', 'output.mp4'
],
files: [
{
data: new Uint8Array(vab),
name: videoFile
},
{
data: new Uint8Array(aab),
name: "audio.wav"
}
]
});
};
}
function PostBlob(blob) {
var video = document.createElement('video');
video.controls = true;
var source = document.createElement('source');
source.src = URL.createObjectURL(blob);
source.type = 'video/mp4; codecs=mpeg4';
video.appendChild(source);
video.download = 'Play mp4 in VLC Player.mp4';
inner.appendChild(document.createElement('hr'));
var h2 = document.createElement('h2');
h2.innerHTML = '<a href="' + source.src + '" target="_blank" download="Play mp4 in VLC Player.mp4">Download Converted mp4 and play in VLC player!</a>';
inner.appendChild(h2);
h2.style.display = 'block';
inner.appendChild(video);
video.tabIndex = 0;
video.focus();
video.play();
document.querySelector('#record-video').disabled = false;
}
var logsPreview = document.getElementById('logs-preview');
function log(message) {
var li = document.createElement('li');
li.innerHTML = message;
logsPreview.appendChild(li);
li.tabIndex = 0;
li.focus();
}
window.onbeforeunload = function() {
document.querySelector('#record-video').disabled = false;
};
</script>
<section class="experiment own-widgets">
<h2 class="header" id="updates" style="color: red; padding-bottom: .1em;"><a href="https://github.com/muaz-khan/Ffmpeg.js/issues" target="_blank">Ffmpeg.js Issues</a>
</h2>
<div id="github-issues"></div>
</section>
<section class="experiment">
<h2 class="header" id="feedback">Feedback</h2>
<div>
<textarea id="message" style="border: 1px solid rgb(189, 189, 189); height: 8em; margin: .2em; outline: none; resize: vertical; width: 98%;" placeholder="Have any message? Suggestions or something went wrong?"></textarea>
</div>
<button id="send-message" style="font-size: 1em;">Send Message</button><small style="margin-left: 1em;">Enter your email too; if you want "direct" reply!</small>
</section>
<section class="experiment">
<h2 class="header">Using ffmpeg-asm.js...</h2>
<ol>
<li>
WebM can be converted in mp4.
</li>
<li>
WAV can be converted in ogg or mp3.
</li>
<li>
WAV can be merged in mp4.
</li>
</ol>
<p style="margin-top: 0;">
If WAV or WebM is 5MB in size; ogg, mp3 or mp4 will be 700kb!
</p>
</section>
<section class="experiment">
<p style="margin-top: 0;">
RecordRTC is MIT licensed on Github! <a href="https://github.com/muaz-khan/RecordRTC" target="_blank">Documentation</a>
</p>
</section>
<section class="experiment own-widgets latest-commits">
<h2 class="header" id="updates" style="color: red; padding-bottom: .1em;"><a href="https://github.com/muaz-khan/Ffmpeg.js/commits/master" target="_blank">Latest Updates</a></h2>
<div id="github-commits"></div>
</section>
</article>
<a href="https://github.com/muaz-khan/Ffmpeg.js" class="fork-right"></a>
<a href="https://github.com/muaz-khan/RecordRTC" class="fork-left"></a>
<footer>
<p>
<a href="https://www.webrtc-experiment.com/">WebRTC Experiments</a>
© <a href="https://plus.google.com/+MuazKhan" rel="author" target="_blank">Muaz Khan</a>
<a href="mailto:muazkh@gmail.com" target="_blank">muazkh@gmail.com</a>
</p>
</footer>
<!-- commits.js is useless for you! -->
<script>
window.useThisGithubPath = 'muaz-khan/Ffmpeg.js';
</script>
<script src="https://cdn.webrtc-experiment.com/commits.js" async> </script>
</body>
</html>