RecordRTC is a server-less (entire client-side) JavaScript library can be used to record WebRTC audio/video media streams. It supports cross-browser audio/video recording. Current experiment: 1) Records audio/video separately as wav/webm, 2) POST them in
This experiment:
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In node.js command prompt window:
npm recordrtc; it will install in "node_modules" directorycd node_modules\recordrtc to locate the directorynode index to start http://localhost:8000/=
merger.bat)merger.bat file is executed to invoke ffmpeg functionalities:
@echo off
"C:\ffmpeg\bin\ffmpeg.exe" -i %1 -i %2 %3
It is assumed that you already have installed ffmpeg on your system. Though, EXE file is hard-coded to "C:\ffmpeg\bin\ffmpeg.exe" however you can easily edit it according to your own installations.
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http://www.wikihow.com/Install-FFmpeg-on-Windows
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In the node.js command prompt window; type node index; then open http://localhost:8000/.
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index.html<!DOCTYPE html>
<html>
<head>
<title>RecordRTC over Node.js</title>
<script src="https://www.WebRTC-Experiment.com/RecordRTC.js"> </script>
</head>
<body>
<video id="camera-preview" controls style="border: 1px solid rgb(15, 158, 238); width: 94%;"></video><hr />
<button id="start-recording">Start Recording</button>
<button id="stop-recording" disabled="">Stop Recording</button>
<script>
var startRecording = document.getElementById('start-recording');
var stopRecording = document.getElementById('stop-recording');
var cameraPreview = document.getElementById('camera-preview');
var audio = document.querySelector('audio');
var recordAudio, recordVideo;
startRecording.onclick = function() {
startRecording.disabled = true;
var video_constraints = {
mandatory: { },
optional: []
};
navigator.getUserMedia({
audio: true,
video: video_constraints
}, function(stream) {
cameraPreview.src = window.URL.createObjectURL(stream);
cameraPreview.play();
recordAudio = RecordRTC(stream, {
bufferSize: 4096
});
recordVideo = RecordRTC(stream, {
type: 'video'
});
recordAudio.startRecording();
recordVideo.startRecording();
stopRecording.disabled = false;
});
};
var fileName;
stopRecording.onclick = function() {
startRecording.disabled = false;
stopRecording.disabled = true;
fileName = Math.round(Math.random() * 99999999) + 99999999;
recordAudio.stopRecording();
recordVideo.stopRecording();
recordAudio.getDataURL(function(audioDataURL) {
recordVideo.getDataURL(function(videoDataURL) {
var files = {
audio: {
name: fileName + '.wav',
type: 'audio/wav',
contents: audioDataURL
},
video: {
name: fileName + '.webm',
type: 'video/webm',
contents: videoDataURL
}
};
cameraPreview.src = '';
cameraPreview.poster = 'ajax-loader.gif';
xhr('/upload', JSON.stringify(files), function(fileName) {
cameraPreview.src = location.href + 'uploads/' + fileName;
cameraPreview.play();
});
});
});
};
function xhr(url, data, callback) {
var request = new XMLHttpRequest();
request.onreadystatechange = function() {
if (request.readyState == 4 && request.status == 200) {
callback(request.responseText);
}
};
request.open('POST', url);
request.send(data);
}
</script>
</body>
</html>
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index.jsvar server = require('./server'),
handlers = require('./handlers'),
router = require('./router'),
handle = { };
handle["/"] = handlers.home;
handle["/home"] = handlers.home;
handle["/upload"] = handlers.upload;
handle._static = handlers.serveStatic;
server.start(router.route, handle);
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server.jsvar config = require('./config'),
http = require('http'),
url = require('url');
function start(route, handle) {
function onRequest(request, response) {
var pathname = url.parse(request.url).pathname,
postData = '';
request.setEncoding('utf8');
request.addListener('data', function(postDataChunk) {
postData += postDataChunk;
});
request.addListener('end', function() {
route(handle, pathname, response, postData);
});
}
http.createServer(onRequest).listen(config.port);
}
exports.start = start;
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handlers.jsvar config = require('./config'),
fs = require('fs'),
sys = require('sys'),
exec = require('child_process').exec;
function home(response, postData) {
response.writeHead(200, { 'Content-Type': 'text/html' });
response.end(fs.readFileSync('./static/index.html'));
}
// this function uploads files
function upload(response, postData) {
var files = JSON.parse(postData);
// writing audio file to disk
_upload(response, files.audio);
// writing video file to disk
_upload(response, files.video);
merge(response, files);
}
// this function merges wav/webm files
function merge(response, files) {
// following command tries to merge wav/webm files using ffmpeg
var merger = __dirname + '\\merger.bat';
var audioFile = __dirname + '\\uploads\\' + files.audio.name;
var videoFile = __dirname + '\\uploads\\' + files.video.name;
var mergedFile = __dirname + '\\uploads\\' + files.audio.name.split('.')[0] + '-merged.webm';
// if a "directory" has space in its name; below command will fail
// e.g. "c:\\dir name\\uploads" will fail.
// it must be like this: "c:\\dir-name\\uploads"
var command = merger + ', ' + videoFile + " " + audioFile + " " + mergedFile + '';
var cmd = exec(command, function(error, stdout, stderr) {
if (error) {
console.log(error.stack);
console.log('Error code: ' + error.code);
console.log('Signal received: ' + error.signal);
} else {
response.statusCode = 200;
response.writeHead(200, { 'Content-Type': 'application/json' });
response.end(files.audio.name.split('.')[0] + '-merged.webm');
// removing audio/video files
fs.unlink(audioFile);
fs.unlink(videoFile);
// auto delete file after 1-minute
setTimeout(function() {
fs.unlink(mergedFile);
}, 60 * 1000);
}
});
}
function _upload(response, file) {
var fileRootName = file.name.split('.').shift(),
fileExtension = file.name.split('.').pop(),
filePathBase = config.upload_dir + '/',
fileRootNameWithBase = filePathBase + fileRootName,
filePath = fileRootNameWithBase + '.' + fileExtension,
fileID = 2,
fileBuffer;
while (fs.existsSync(filePath)) {
filePath = fileRootNameWithBase + '(' + fileID + ').' + fileExtension;
fileID += 1;
}
file.contents = file.contents.split(',').pop();
fileBuffer = new Buffer(file.contents, "base64");
if (config.s3_enabled) {
var knox = require('knox'),
client = knox.createClient(config.s3),
headers = { 'Content-Type': file.type };
client.putBuffer(fileBuffer, fileRootName, headers);
} else {
fs.writeFileSync(filePath, fileBuffer);
}
}
function serveStatic(response, pathname, postData) {
var extension = pathname.split('.').pop(),
extensionTypes = {
'js': 'application/javascript',
'webm': 'video/webm',
'gif': 'image/gif'
};
response.writeHead(200, { 'Content-Type': extensionTypes[extension] });
if (extensionTypes[extension] == 'video/webm')
response.end(fs.readFileSync('.' + pathname));
else
response.end(fs.readFileSync('./static' + pathname));
}
exports.home = home;
exports.upload = upload;
exports.serveStatic = serveStatic;
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router.jsfunction respondWithHTTPCode(response, code) {
response.writeHead(code, { 'Content-Type': 'text/plain' });
response.end();
}
function route(handle, pathname, response, postData) {
var extension = pathname.split('.').pop();
var staticFiles = {
js: 'js',
gif: 'gif',
css: 'css',
webm: 'webm'
};
if ('function' === typeof handle[pathname]) {
handle[pathname](response, postData);
} else if (staticFiles[extension]) {
handle._static(response, pathname, postData);
} else {
respondWithHTTPCode(response, 404);
}
}
exports.route = route;
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config.jsexports.port = 8000;
exports.upload_dir = './uploads';
exports.s3 = {
key: '',
secret: '',
bucket: ''
};
exports.s3_enabled = false;
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RecordRTC is released under MIT licence . Copyright (c) 2013 Muaz Khan.
FAQs
RecordRTC is a server-less (entire client-side) JavaScript library that can be used to record WebRTC audio/video media streams. It supports cross-browser audio/video recording.
The npm package recordrtc receives a total of 81,522 weekly downloads. As such, recordrtc popularity was classified as popular.
We found that recordrtc demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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