jumpstreamer

Live broadcasting and recording software for the web, inspired by OBS.

Demo

install

<script src="jumpstreamer.js"></script>

usage

<div></div>
<script>
  var jump = new JumpStreamer('div') // Element or selector to place the UI
  
  jump.on('stream', function (stream) {
    // stream is the MediaStream output
  })
  jump.on('stopstream', function () {
    // called when the stream stops
  })
</script> 

api

var jump = new JumpStreamer(element, [opts])

element is a HTMLElement or CSS selector string. The display will attempt to fit inside this element.

Optional opts is a configuration object that will override the following defaults:

{
  output: {
    width: 1200,  // resolution of the output stream
    height: 900,
    fps: 40       // frames per second of the output stream
  },
  injectStyles: true, // whether to inject the JumpStreamer css
  inputs: [array of input devices - see below]
}

adding input devices

There are several ways to get MediaStreams to use as input sources. To add your own, put an object inside the opts.inputs array that has the following format:

{
  name: 'Display Name of Device', // Can be anything, but it should be descriptive
  getStream: function (callback) {
    // This function should call "callback" with the following arguments
    callback(err, name, stream)  
      - "err" is any error thrown, null otherwise
      - "name" is the name of the source (usually the same as the device name)
      - "stream" is the input MediaStream
  }
}

For example, here is one of the default devices:

{
  name: 'Video Camera',
  getStream: function (callback) {
    getusermedia({audio:true, video:true}, function (err, stream) {
      callback(err, 'Video Camera', stream)
    })
  }
}

notes

jumpstreamer does not broadcast your video, it simply gives you an output MediaStream to do with as you wish.

You could send it over a WebRTC connection, record it as a file, send to to a proxy RTMP server, pipe it through FFMPEG... whatever!

todo

• Audio mixer
• Scene transitions
• More output options