Player.js

A JavaScript library for interacting with iframes that support Player.js spec.

var player = new playerjs.Player('iframe');

player.on('ready', function(){
  player.on('play', function(){
    console.log('play');
  });

  player.getDuration(function(duration){
    console.log(duration);
  });

  if (player.supports('method', 'mute')){
    player.mute();
  }

  player.play();
});

Install

Player.js is hosted on Embedly's CDN.

<script type="text/javascript" src="//cdn.embed.ly/player-0.0.12.min.js"></script>

Ready

Because of the dance that we need to do between both iframes, you should always wait till the ready events to fire before interacting with the player object. However, the player will internally queue messages until ready is called.

var player = new playerjs.Player('iframe');

player.on(playerjs.Events.PLAY, function(){
  console.log('play');
});

player.on('ready', function(){
  player.setCurrentTime(20);
});

Timing

The timing between when the iframe is added and when the ready event is fired is important. Sadly we cannot fire the ready event till the iframe is loaded, but there is no concrete way of telling when postmessage is available to us.

The best way is to do one of the following.

Create the iframe via JavaScript

var iframe = document.createElement('iframe');
iframe.src = 'https://example.com/iframe';
document.body.appendChild(iframe);

var player = new playerjs.Player(iframe);

In this case, Player.js will listen to the onload event of the iframe and only try to communicate when ready.

Wait for the document to be ready.

<iframe src="//example.com/iframe"></iframe>

<script>
  $(document).on('ready', function(){
    $('iframes').each(function(){
      var player = new playerjs.Player(this);
      player.on('ready', function(){
        player.play();
      });
    });
  });
</script>

At this point we can reasonably assume that the iframe's been loaded and the ready. Player.js will take care of listening for ready events that were fired before the player is set up.

Methods

play: void

Play the media:

player.play();

pause: void

Pause the media:

player.pause();

getPaused: boolean

Determine if the media is paused:

player.getPaused(function(value){
  console.log('paused:', value);
});

mute: void

Mute the media:

player.mute();

unmute: void

Unmute the media:

player.unmute();

getMuted: boolean

Determine if the media is muted:

player.getMuted(function(value){
  console.log('muted:', value);
});

setVolume: void

Set the volume. Value needs to be between 0-100:

player.setVolume(50);

getVolume: number

Get the volume. Value will be between 0-100:

player.getVolume(function(value){
  console.log('getVolume:', value);
});

getDuration: number

Get the duration of the media is seconds:

player.getDuration(function(value){
  console.log('getDuration:', value);
});

setCurrentTime: number

Perform a seek to a particular time in seconds:

player.setCurrentTime(50);

getCurrentTime: number

Get the current time in seconds of the video:

player.getCurrentTime(function(value){
  console.log('getCurrentTime:', value);
});

off: void

Remove an event listener. If the listener is specified it should remove only that listener, otherwise remove all listeners:

player.off('play');

player.off('play', playCallback);

on: void

Add an event listener:

player.on('play', function(){
  console.log('play');
}, this);

supports: ['method', 'event'], methodOrEventName

Determines if the player supports a given event or method.

player.supports('method', 'getDuration'); player.supports('event', 'ended');

Events

Events that can be listened to.

ready

fired when the media is ready to receive commands. This is fired regardless of listening to the event. Note: As outlined in the PlayerJs Spec, you may run into inconsistencies if you have multiple players on the page with the same src. To get around this, simply append a UUID or a timestamp to the iframe's src to guarantee that all players on the page have a unique src.

progress

fires when the media is loading additional media for playback:

{
  percent: 0.8,
}

timeupdate

fires during playback:

data: {
  seconds: 10,
  duration: 40
}

play

fires when the video starts to play.

pause

fires when the video is paused.

ended

fires when the video is finished.

seeked

fires when the video has been seeked by the user.

error

fires when an error occurs.

Receiver

If you are looking to implement the Player.js spec, we include a Receiver that will allow you to easily listen to events and takes care of the house keeping.

var receiver = new playerjs.Receiver();

receiver.on('play', function(){
  video.play();
  receiver.emit('play');
});

receiver.on('pause', function(){
  video.pause();
  receiver.emit('pause');
});

receiver.on('getDuration', function(callback){
  callback(video.duration);
});

video.addEventListener('timeupdate', function(){
  receiver.emit('timeupdate', {
    seconds: video.currentTime,
    duration: video.duration
  });
});

receiver.ready();

Methods

on

Requests an event from the video. The above player methods should be implemented. If the event expects a return value a callback will be passed into the function call:

receiver.on('getDuration', function(callback){
  callback(video.duration);
});

Otherwise you can safely ignore any inputs:

receiver.on('play', function(callback){
  video.play();
});

emit

Sends events to the parent as long as someone is listing. The above player events should be implemented. If a value is expected, it should be passed in as the second argument:

receiver.emit('timeupdate', {seconds:20, duration:40});

ready

Once everything is in place and you are ready to start responding to events, call this method. It performs some house keeping, along with emitting ready:

receiver.ready();

Adapters

In order to make it super easy to add Player.js to any embed, we have written adapters for common video libraries. We currently have adapters for Video.js, JWPlayer and HTML5 Video. An Adapter wraps the Receiver and wires up all the events so your iframe is Player.js compatible.

VideoJSAdapter

An adapter for Video.js.

videojs("video", {}, function(){
  var adapter = new playerjs.VideoJSAdapter(this);
  // ... Do other things to initialize your video.

  // Start accepting events
  adapter.ready();
});

HTML5Adapter

An adapter for HTML5 Video.

var video = document.getElementById('video');
video.load();

var adapter = playerjs.HTML5Adapter(video);

// Start accepting events
adapter.ready();

JWPlayerAdapter

An adapter for JW Player.

jwplayer("video").setup({
  file: "/lib/videos/demo.mp4",
  height: '100%',
  width: '100%'
});

var adapter = new playerjs.JWPlayerAdapter(jwplayer());

jwplayer().onReady(function(){
  adapter.ready();
});

codovate/player.js

Player.js

Install

Ready

Timing

Create the iframe via JavaScript

Wait for the document to be ready.

Methods

Events

Receiver

Methods

Adapters

VideoJSAdapter

HTML5Adapter

JWPlayerAdapter