Monitor video.js

Features

The following data can be collected by the Mux Data SDK when you use the Video.js SDK, as described below.

Supported Features:

• Engagement metrics
• Quality of Experience Metrics
• Web metrics such as Player Startup Time, Page Load Time, etc
• Available for deployment from a package manager
• Can infer CDN identification from response headers
• Custom Dimensions
• Average Bitrate metrics and renditionchange events
• Request metrics
• Customizable Error Tracking
• Ads metrics
• Custom Beacon Domain
• Extraction of HLS Session Data
• Live Stream Latency metric

Request metrics and CDN identification are available using videojs-contrib-hls or Video.js v7+. Preroll Ads metrics & metadata available if using videojs-ima. Session Data is available with Video.js w/ HLS.js.

1Install videojs-mux

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. videojs-mux follows semantic versioning and the API will not change between major releases.

npm install --save videojs-mux

2Initialize Mux Data

Get your ENV_KEY from the Mux environments dashboard.

Call video.js like you normally would and include the Mux plugin options.

import videojs from "video.js";
import "video.js/dist/video-js.css";
import "videojs-mux";

videojs('my-player', {
  plugins: {
    mux: {
      debug: false,
      data: {
        env_key: 'ENV_KEY', // required

        // Metadata
        player_name: '', // ex: 'My Main Player'

        // ... and other metadata
      }
    }
  }
});

3Make your data actionable

The only required field in the options that you pass into videojs-mux 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 on initialization.

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      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'
        // There is no need to provide player_init_time, tracked automatically
        // 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.

4Set or update metadata after initialization

There are some cases where you may not have the full set of metadata until after the video playback has started. In this case, you should omit the values when you first initialize the Mux SDK. Then, once you have the metadata, you can update the metadata with the updateData method.

// player is the instance returned by the `videojs` function
player.mux.updateData({ video_title: 'My Updated Great Video' });

5Changing 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

In order to signal the Mux SDK that a new view is starting, you will need to emit a videochange event, along with metadata about the new video. 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.

// player is the instance returned by the `videojs` function
player.mux.emit('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.

// player is the instance returned by the `videojs` function
player.mux.emit('programchange', {
  video_id: 'abc345',
  video_title: 'My Other Great Video',
  video_series: 'Weekly Great Videos',
  // ...
});

6Advanced options

Disable cookies

By default, Mux plugins for HTML5-based players use a cookie to track playback across subsequent page views in order to understand viewing sessions. 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. For information about the specific data tracked in the cookie, please refer to: What information is stored in Mux Data HTML cookies.

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

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      disableCookies: true,
      data: {
        env_key: "ENV_KEY",
        // ...
      }
    }
  }
});

Over-ride 'do not track' behavior

By default, Mux plugins for HTML5-based players do 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.

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      respectDoNotTrack: true,
      data: {
        env_key: "ENV_KEY",
        // ...
      }
    }
  }
});

Customize error tracking behavior

By default, videojs-mux 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.

// player is the instance returned by the `videojs` function
player.mux.emit('error', {
  player_error_code: 100,
  player_error_message: 'Description of error',
  player_error_context: 'Additional context for the 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 generalized 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.

The error message and code are combined together and aggregated with all errors that occur in your environment in order to find the most common errors that occur. To make error aggregation as useful as possible, these values should be general enough to provide useful information but not specific to each individual error (such as stack trace).

You can use player_error_context to provide instance-specific information derived from the error such as stack trace or segment-ids where an error occurred. This value is not aggregated with other errors and can be used to provide detailed information. Note: Please do not include any personally identifiable information from the viewer in this data.

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.

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

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      errorTranslator,
      data: {
        env_key: "ENV_KEY",
        // ...
      }
    }
  }
});

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.

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      automaticErrorTracking: false,
      data: {
        env_key: "ENV_KEY",
        // ...
      }
    }
  }
});

Ads tracking with videojs-mux

If you are using videojs-ima, Brightcove's IMA3 FreeWheel or OnceUX plugins with VideoJS then videojs-mux will track ads automatically. No extra configuration is needed.

Customize beacon collection domain

If you have integrated a custom domain for Data collection, specify your custom domain by setting beaconCollectionDomain.

videojs('#my-player', {
  plugins: {
    mux: {
      debug: false,
      beaconCollectionDomain: 'CUSTOM_DOMAIN', // ex: 'foo.bar.com'
      data: {
        env_key: "ENV_KEY",
        // ...
      }
    }
  }
});