recordrtc-socketio
v1.0.6
Records audio/video separately as wav/webm. Emits both files using socket.io. Socket.io server end receives emitted data; and writes wav/web files to disk. Node.js code invokes ffmpeg to merge wav/webm in single webm file. Socket.io server emits merged ev
webrtcjavascriptRecordRTCsocket.ioNode.jsffmpegaudio-recordingvideo-recordinggif-recordingaudio/video recording
0/weekUpdated 3 years agoMIT
Published by Muaz Khan
npm install recordrtc-socketioRecordRTC over Socket.io
 
``
sh
npm install recordrtc-socketio
cd ./node_modules/recordrtc-socketio/
to run it!
node server.js
now open: http://localhost:9001
`
There are some other NPM packages regarding RecordRTC:
* https://www.npmjs.org/search?q=RecordRTC
This experiment:
1. Records audio/video separately as wav/webm
2. Emits both files using socket.io
3. Socket.io server end receives emitted data; and writes wav/web files to disk
4. Node.js code invokes ffmpeg to merge wav/webm in single "webm" file
5. Socket.io server emits merged event; and passes-back the URL of the merged file
Client side stuff:
`javascript
var socketio = io();
var files = {
audio: {
name: fileName + '.wav',
type: 'audio/wav',
dataURL: dataURL.audio
},
video: {
name: fileName + '.webm',
type: 'video/webm',
dataURL: dataURL.video
}
};
socketio.emit('message', files);
`
Server side code that captures above data:
`javascript
io.sockets.on('connection', function(socket) {
socket.on('message', function(data) {
console.log('writing to disk');
writeToDisk(data.audio.dataURL, data.audio.name);
writeToDisk(data.video.dataURL, data.video.name);
merge(socket, data.audio.name, data.video.name);
});
});
`
After merging; server side code that passes back the URL of the merged file:
`javascript
socket.emit('merged', audioName.split('.')[0] + '-merged.webm');
`
Client-side code that receives merged-file URL:
`javascript
socketio.on('merged', function (fileName) {
cameraPreview.src = location.href + '/uploads/' + fileName;
cameraPreview.play();
});
`
Windows Batch File (
merger.bat)
merger.bat file is executed to invoke ffmpeg functionalities on windows:
`sh
@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.
.sh file
merger.sh file is executed to invoke ffmpeg functionalities on Mac/Linux/etc.
`sh
ffmpeg -i video-file.webm -i audio-file.wav -map 0:0 -map 1:0 output-file-name.webm
`
Using Linux; ffmpeg installation is super-easy! You can install DEVEL packages as well.
How to install ffmpeg on windows?
1. Download ffmpeg and extract ZIP file
2. Rename extracted directory to "ffmpeg"
3. Right click over "My Computer" icon and select "Properties" context-menu option
4. Select "Advance system settings" from top-left section
5. Click "Environment Variables..." button from "Advanced" tab
6. Click "New..." button and in the "Variable name" box, enter "Path".
7. In the "Variable value" box, enter extracted directory full URI e.g. "C:\ffmpeg"
8. Click "OK" and done!
http://www.wikihow.com/Install-FFmpeg-on-Windows
How to install ffmpeg on Mac OSX?
Make sure you have homebrew installed. Then run following command:
`
brew install ffmpeg --with-libvpx --with-theora --whit-libogg --with-libvorbis
`
How to test?
In the node.js command prompt window; type node server. It will run socket.io server at port 9001`. Then you can open index.html file on any webserver.
License
RecordRTC is released under MIT licence . Copyright (c) Muaz Khan.