Monitor HLS.js

1Install mux-embed

Include the Mux JavaScript SDK on every page of your web app that includes video. You can use the Mux-hosted version of the script or install via npm. mux-embed follows semantic versioning and the API will not change between major releases.

<script src="https://src.litix.io/core/4/mux.js"></script> 

2Initialize Mux Data

Get your ENV_KEY from the Mux environments dashboard.

<script>
  window.muxPlayerInitTime = Date.now();
</script>

<video
  id="my-player"
  controls
  width="960"
  height="400"
/>

<script>
  if (Hls.isSupported()) {
    let hls = new Hls();

    // we're using a Mux HLS URL in this example, but the Mux Data integration
    // with HLS.js works with any HLS url
    hls.loadSource('https://stream.mux.com/yb2L3z3Z4IKQH02HYkf9xPToVYkOC85WA.m3u8');
    hls.attachMedia(videoEl);

    if (typeof mux !== 'undefined') {
      const videoEl = document.querySelector('#my-player');

      mux.monitor(videoEl, {
        debug: false,
        hlsjs: hls,
        Hls: Hls,
        data: {
          env_key: 'ENV_KEY', // required
          // Metadata fields
          player_name: 'Main Player', // any arbitrary string you want to use to identify this player
          player_init_time: window.muxPlayerInitTime // ex: 1451606400000
          // ...
        }
      });
    }
  }
</script> 

Call mux.monitor and pass in a valid CSS selector or the video element itself. Followed by the SDK options and metadata. If you use a CSS selector that matches multiple elements, the first matching element in the document will be used.

In the SDK options, be sure to pass in the hlsjs instance and the Hls constructor. If the Hls constructor is available on the global window object then it can be omitted from the SDK options.

Alternatively, if your player does not immediately have access to the HLS.js player instance, you can start monitoring HLS.js at any time in the future. In order to do this, you can call either of the following:

copy
mux.addHLSJS("#my-player", options)
// or
myVideoEl.mux.addHLSJS(options) 

Log in to the Mux dashboard and find the environment that corresponds to your env_key and look for video views. It takes about a minute or two from tracking a view for it to show up on the Metrics tab.

If you aren't seeing data, check to see if you have an ad blocker, tracking blocker or some kind of network firewall that prevents your player from sending requests to Mux Data servers.

3Make your data actionable

The only required field in the options that you pass into mux-embed is env_key. But without some metadata the metrics in your dashboard will lack the necessary information to take meaningful actions. Metadata allows you to search and filter on important fields in order to diagnose issues and optimize the playback experience for your end users.

Pass in metadata under the data key when calling mux.monitor.

copy
mux.monitor('#my-player', {
  debug: false,
  hlsjs: hls,
  Hls,
  data: {
    env_key: 'ENV_KEY', // required

    // Site Metadata
    viewer_user_id: '', // ex: '12345'
    experiment_name: '', // ex: 'player_test_A'
    sub_property_id: '', // ex: 'cus-1'

    // Player Metadata
    player_name: '', // ex: 'My Main Player'
    player_version: '', // ex: '1.0.0'
    player_init_time: '', // ex: 1451606400000

    // Video Metadata
    video_id: '', // ex: 'abcd123'
    video_title: '', // ex: 'My Great Video'
    video_series: '', // ex: 'Weekly Great Videos'
    video_duration: '', // in milliseconds, ex: 120000
    video_stream_type: '', // 'live' or 'on-demand'
    video_cdn: '' // ex: 'Fastly', 'Akamai'
  }
}); 

For more information, view Make your data actionable.

4Changing the video

There are two cases where the underlying tracking of the video view need to be reset:

1. New source: When you load a new source URL into an existing player.
2. New program: When the program within a singular stream changes (such as a program change within a continuous live stream).

Note: You do not need to change the video info when changing to a different source of the same video content (e.g. different resolution or video format).

New source

If your application plays multiple videos back-to-back in the same video player, you need to signal when a new video starts to the Mux SDK. Examples of when this is needed are:

• The player advances to the next video in a playlist
• The user selects a different video to play

See metadata in Make your data actionable for the full list of video details you can provide. You can include any metadata when changing the video but you should only need to update the values that start with video_.

It's best to change the video info immediately after telling the player which new source to play.

copy
mux.emit('#my-player', 'videochange', {
  video_id: 'abc345',
  video_title: 'My Other Great Video',
  video_series: 'Weekly Great Videos',
  ...
}); 

New Program

In some cases, you may have the program change within a stream, and you may want to track each program as a view on its own. An example of this is a live stream that streams multiple programs back to back, with no interruptions.

In this case, you emit a programchange event, including the updated metadata for the new program within the continuous stream. This will remove all previous video data and reset all metrics for the video view, creating a new video view. See Metadata for the list of video details you can provide. You can include any metadata when changing the video but you should only need to update the values that start with video.

Note: The programchange event is intended to be used only while the player is currently not paused. If you emit this event while the player is paused, the resulting view will not track video startup time correctly, and may also have incorrect watch time. Do not emit this event while the player is paused.

copy
mux.emit('#my-player', 'programchange', {
  video_id: 'abc345',
  video_title: 'My Other Great Video',
  video_series: 'Weekly Great Videos',
  // ...
}); 

5Advanced options

Disable cookies

By default, Mux plugins for HTML5-based players use a cookie to track playback across subsequent page views. This cookie includes information about the tracking of the viewer, such as an anonymized viewer ID that Mux generates for each user. None of this information is personally-identifiable, but you can disable the use of this cookie if desired. For instance, if your site or application is targeted towards children under 13, you should disable the use of cookies.

This is done by setting disableCookies: true in the options.

copy
mux.monitor('#my-player', {
  debug: false,
  disableCookies: true,
  hlsjs: hls,
  Hls,
  data: {
    env_key: 'ENV_KEY',
    // ... rest of metadata
  }
} 

Over-ride 'do not track' behavior

By default, mux-embed does not respect Do Not Track when set within browsers. This can be enabled in the options passed to Mux, via a setting named respectDoNotTrack. The default for this is false. If you would like to change this behavior, pass respectDoNotTrack: true.

copy
mux.monitor('#my-player', {
  debug: false,
  hlsjs: hls,
  Hls,
  respectDoNotTrack: true, // Disable tracking of browsers where Do Not Track is enabled
  data: {
    env_key: 'ENV_KEY',
    // ... rest of metadata
  }
} 

Customize error tracking behavior

By default, mux-embed will track errors emitted from the video element as fatal errors. If a fatal error happens outside of the context of the player, you can emit a custom error to the mux monitor.

copy
mux.emit('#my-player', 'error', {
  player_error_code: 100,
  player_error_message: 'Description of error'
}); 

When triggering an error event, it is important to provide values for player_error_code and player_error_message. The player_error_message should provide a detailed description of the error as it happened. The player_error_code must be an integer, and should provide a category of the error. If the errors match up with the HTML Media Element Error, you can use the same codes as the corresponding HTML errors. However, for custom errors, you should choose a number greater than or equal to 100.

In general you should not send a distinct code for each possible error message, but rather group similar errors under the same code. For instance, if your library has two different conditions for network errors, both should have the same player_error_code but different messages

Error translator

If your player emits error events that are not fatal to playback or the errors are unclear and/or do not have helpful information in the default error message and codes you might find it helpful to use an error translator or disable automatic error tracking all together.

copy
function errorTranslator (error) {
  return {
    player_error_code: translateCode(error.player_error_code),
    player_error_message: translateMessage(error.player_error_message),
  };
}

mux.monitor('#my-player', {
  debug: false,
  errorTranslator,
  hlsjs: hls,
  Hls,
  data: {
    env_key: 'ENV_KEY', // required

    // ... additional metadata
  }
}); 

If you return false from your errorTranslator function then the error will not be tracked. Do this for non-fatal errors that you want to ignore. If your errorTranslator function itself raises an error, then it will be silenced and the player's original error will be used.

Disable automatic error tracking

In the case that you want full control over what errors are counted as fatal or not, you may want to consider turning off Mux's automatic error tracking completely. This can be done by passing automaticErrorTracking: false in the configuration object.

copy
mux.monitor('#my-player', {
  debug: false,
  automaticErrorTracking: false,
  hlsjs: hls,
  Hls,
  data: {
    env_key: 'ENV_KEY', // required

    // ... additional metadata
  } 

Release notes

Current release

v4.9.2

• Fixed an issue around the disablePlayheadRebufferTracking option

Previous releases

v4.9.1

• Fix issue where getStartDate does not always return a date object

v4.9.0

• Support PDT and player_live_edge_program_time for Native Safari

• Set a max payload size in mux-embed

v4.8.0

• Add option disablePlayheadRebufferTracking to allow players to disable automatic rebuffering metrics. Players can emit their own rebufferstart or rebufferend events and track rebuffering metrics.

• Fix an issue with removing player_error_code and player_error_message when the error code is 1. Also stops emitting MEDIA_ERR_ABORTED as errors.

• Now leaving Player Software Version for HTML5 Video Element unset rather than "No Versions" as it is no longer needed.

v4.7.0

• Add an option to specify beaconCollectionDomain for Data custom domains

v4.6.2

• Fix an issue with emitting heartbeat events while the player is not playing

v4.6.1

• Fix an issue with removing event listeners from window after the player monitor destroy event

v4.6.0

• Update hls.js monitor to record session data with fields prefixed as io.litix.data.
• Update the manifest parser to parse HLS session data tags

v4.5.0

• Add short codes to support internal video experiments
• Collect request header prefixed with x-litix-*
• Capture fatal hls.js errors
• Make envKey an optional parameter

v4.4.4

• Add a player events enum on the mux object (e.g. mux.events.PLAY)
• Use the browser visibilitychange listener instead of unload to handle destructuring the player monitor.

v4.4.3

• Fix: Specify video_source_is_live for HLS.js monitor

v4.4.2

• Group events into 10 second batches before sending a beacon

v4.4.1

• Exclude latency metrics from beacons if video_source_is_live is not true

v4.4.0

• Add a lightweight HLS manifest parser to capture latency metrics for player's that don't expose an API for accessing the manifest.
• Allow players to emit player_program_time instead of calculating internally

v4.3.0

• Add support for calculating latency metrics when streaming using HLS

v4.2.5

• Remove default video_id when not specified by the developer.

v4.2.4

• Add minified keys for latency metrics

v4.2.3

• Add minified keys for new program time metrics

v4.2.2

• Fix bug causing missing bitrate metrics using HLS.js {'>'}v1.0.0

v4.2.1

• (video element monitor) Fix an issue where some non-fatal errors thrown by the video were tracked as playback failures

v4.2.0

• Fix an issue where views triggered by programchange may not report metrics correctly
• Fix an issue where calling el.mux.destroy() multiple times in a row raised an exception

v4.1.1

• Fix an issue where player_remote_played wasn't functioning correctly

v4.1.0

• Add support for custom dimensions

v4.0.1

• Support HLS.js v1.0.0

v4.0.0

• Enable sending optional ad quartile events through.
• Move device detection server-side, improving data accuracy and reducing client SDK size.
• Fix an issue where jank may be experienced in some web applications when the SDK is loaded.

v3.4.0

• Setting to disable rebuffer tracking disableRebufferTracking that defaults to false.

v3.3.0

• Adds viewer_connection_type detection.

v3.2.0

• Adds support for renditionchange.

v3.1.0

• Add checks for window being undefined and expose a way for SDKs to pass in platform information. This work is necessary for compatibility with react-native-video.

v3.0.0

• Setting to disable Mux Data collection when Do Not Track is present now defaults to off
• Do not submit the source url when a video is served using the data: protocol

v2.10.0

• Use Performance Timing API, when available, for view event timestamps

v2.9.1

• Fix an issue with server side rendering

v2.9.0

• Support for Dash.js v3

v2.8.0

• Submit Player Instance Id as a unique identifier

v2.7.3

• Fixed a bug when using mux.monitor with Hls.js or Dash.js the source hostname was not being properly collected.