New Relic Dash.js Tracker

The New Relic Dash.js Tracker provides comprehensive video analytics for applications using Dash.js Player. Track video events, monitor playback quality, identify errors, and gain deep insights into user engagement and streaming performance for MPEG-DASH content.

Features

🎯 Automatic Event Detection - Captures Dash.js player events automatically without manual instrumentation
📊 Comprehensive Bitrate Tracking - Four distinct bitrate metrics for complete quality analysis
🔄 Multi-Version Support - Compatible with both dash.js v4.x and v5.x
📈 QoE Metrics - Quality of Experience aggregation for startup time, buffering, and playback quality
🎨 Event Segregation - Organized event types: VideoAction, VideoErrorAction, VideoCustomAction
🚀 Easy Integration - NPM package or direct script include
⚡ Real-Time Performance - Network throughput and download bitrate monitoring
🎬 MPEG-DASH Specific - Optimized for adaptive streaming with separate video/audio tracks

Installation

Option 1: Install via NPM/Yarn

Install the package using your preferred package manager:

NPM:

npm install @newrelic/video-dash

Yarn:

yarn add @newrelic/video-dash

Option 2: Direct Script Include (Without NPM)

For quick integration without a build system, include the tracker directly in your HTML:

<!DOCTYPE html>
<html>
  <head>
    <!-- Dash.js Player -->
    <script src="https://cdn.dashjs.org/latest/dash.all.min.js"></script>
    
    <!-- New Relic Dash.js Tracker -->
    <script src="path/to/newrelic-video-dash.min.js"></script>
  </head>
  <body>
    <video id="myVideo" controls width="640" height="480"></video>

    <script>
      // Initialize Dash.js player
      var player = dashjs.MediaPlayer().create();
      player.initialize(document.querySelector('#myVideo'), 'https://your-dash-manifest.mpd', true);

      // Configure New Relic tracker with info from one.newrelic.com
      const options = {
        info: {
          licenseKey: "YOUR_LICENSE_KEY",
          beacon: "YOUR_BEACON_URL",
          applicationID: "YOUR_APP_ID"
        }
      };

      // Initialize tracker
      const tracker = new DashTracker(player, options);
    </script>
  </body>
</html>

Setup Steps:

Get Configuration - Visit one.newrelic.com and follow the Streaming Video & Ads onboarding flow to get your licenseKey, beacon, applicationID, and integration code snippet.
Integrate - Include the script in your HTML and initialize with your configuration

Prerequisites

Before using the tracker, ensure you have:

New Relic Account - Active New Relic account with valid application credentials (beacon, applicationID, licenseKey)
Dash.js Player - Version 4.x or 5.x integrated in your application

Usage

Getting Your Configuration

Before initializing the tracker, obtain your New Relic configuration:

Log in to one.newrelic.com
Navigate to the video agent onboarding flow
Copy your credentials: licenseKey, beacon, and applicationID

Basic Setup

import DashTracker from '@newrelic/video-dash';

// Initialize Dash.js player
const player = dashjs.MediaPlayer().create();
player.initialize(document.querySelector('#video'), manifestUrl, autoPlay);

// Configure tracker with credentials from one.newrelic.com
const options = {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  }
};

// Initialize tracker
const tracker = new DashTracker(player, options);

Advanced Configuration

const options = {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  },
  config: {
    qoeAggregate: true,        // Enable QoE event aggregation
    qoeIntervalFactor: 2       // Send QoE events every 2 harvest cycles
  },
  customData: {
    contentTitle: 'My Video Title',
    customPlayerName: 'MyCustomPlayer',
    customAttribute: 'customValue'
  }
};

const tracker = new DashTracker(player, options);

Best Practices

1. Setting `contentTitle`

The contentTitle attribute will display a value if your video metadata contains title information. If the metadata does not include a title, contentTitle will not be populated. For best results, ensure you explicitly set this attribute during initialization:

const tracker = new DashTracker(player, {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  },
  customData: {
    contentTitle: 'My Video Title'  // Explicitly set from your metadata
  }
});

If your title changes dynamically (e.g., playlist or queue):

tracker.sendOptions({
  customData: {
    contentTitle: 'New Video Title'
  }
});

2. Setting `userId`

Set a user identifier to track video analytics per user:

// Set userId during initialization
const tracker = new DashTracker(player, {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  },
  customData: {
    contentTitle: 'Video Title',
    userId: 'user-12345'
  }
});

// Or set userId separately using the API method
tracker.setUserId('user-12345');

3. Adding Custom Attributes for Your Deployment

Add custom attributes unique to your deployment to improve data aggregation and analysis:

const tracker = new DashTracker(player, {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  },
  customData: {
    // Required for identification
    contentTitle: videoMetadata.title,
    userId: currentUser.id,
    
    // Custom attributes for your deployment
    subscriptionTier: 'premium',      // User subscription level
    contentProvider: 'studio-abc',    // Content source
    region: 'us-west-2',              // Geographic region
    cdnProvider: 'cloudflare',        // CDN being used
    deviceType: 'desktop',            // Device category
    appVersion: '2.1.0',              // Your app version
    campaign: 'spring-promo'          // Marketing campaign
  }
});

Use these attributes in New Relic queries:

-- Analyze by subscription tier
SELECT count(*) FROM VideoAction WHERE actionName = 'CONTENT_START' 
FACET subscriptionTier SINCE 1 day ago

-- Monitor by region
SELECT average(contentNetworkDownloadBitrate) FROM VideoAction 
FACET region SINCE 1 hour ago

4. Gradual Rollout with Feature Flags

When deploying to production, use feature flags to enable the tracker gradually. This helps you:

Validate data collection without impacting all users
Monitor performance impact at scale
Catch issues before full deployment
Control monitoring costs

// Example using a feature flag
const rolloutPercentage = 5; // Start with 5% of users

function shouldEnableTracking(userId) {
  // Simple percentage-based rollout
  const hash = userId.split('').reduce((acc, char) => acc + char.charCodeAt(0), 0);
  return (hash % 100) < rolloutPercentage;
}

const player = dashjs.MediaPlayer().create();
player.initialize(document.querySelector('#video'), manifestUrl, true);

// Only initialize tracker if user is in rollout
if (shouldEnableTracking(currentUser.id)) {
  const tracker = new DashTracker(player, {
    info: {
      licenseKey: 'YOUR_LICENSE_KEY',
      beacon: 'YOUR_BEACON_URL',
      applicationID: 'YOUR_APP_ID'
    },
    customData: {
      contentTitle: videoMetadata.title,
      userId: currentUser.id,
      rolloutGroup: `${rolloutPercentage}%`  // Track which rollout group
    }
  });
}

Recommended Rollout Schedule:

Phase	Percentage	Duration	Validation
Initial	5%	2-3 days	Verify data flowing to New Relic
Early	15%	3-5 days	Check data quality and performance
Expansion	25%	5-7 days	Validate across device types
Majority	50%	1-2 weeks	Monitor at scale
Full	100%	Ongoing	Complete deployment

Configuration Options

QoE (Quality of Experience) Settings

Option	Type	Default	Description
`qoeAggregate`	boolean	`false`	Enable Quality of Experience event aggregation. Set to `true` to collect QoE metrics like startup time, buffering, and average bitrate.
`qoeIntervalFactor`	number	`1`	Controls QoE event frequency. A value of `N` sends QoE events once every N harvest cycles. Must be a positive integer. QoE events are always included on first and final harvest cycles.

Custom Data

Add custom attributes to all events:

customData: {
  contentTitle: 'My Video Title',      // Override video title
  customPlayerName: 'MyPlayer',        // Custom player identifier
  customPlayerVersion: '1.0.0',        // Custom player version
  userId: '12345',                     // User identifier
  contentSeries: 'Season 1',           // Series information
  // Add any custom attributes you need
}

Note: There are reserved keywords used for default attributes (see DATAMODEL.md for the complete list). Do not use these reserved keywords as custom attribute names, as they will be dropped.

Limit: The maximum total number of custom attributes per event is 150. Any attributes beyond this limit will be dropped.

API Reference

Core Methods

`tracker.setUserId(userId)`

Set a unique identifier for the current user.

tracker.setUserId('user-12345');

`tracker.setHarvestInterval(milliseconds)`

Configure how frequently data is sent to New Relic. Accepts values between 1000ms (1 second) and 300000ms (5 minutes).

tracker.setHarvestInterval(30000); // Send data every 30 seconds

`tracker.sendCustom(actionName, state, attributes)`

Send custom events with arbitrary attributes.

tracker.sendCustom('VideoBookmarked', 'playing', {
  timestamp: Date.now(),
  position: player.time(),
  userId: 'user-12345',
  bookmarkId: 'bookmark-789'
});

`tracker.sendOptions(options)`

Update tracker configuration after initialization.

tracker.sendOptions({
  customData: {
    contentTitle: 'New Video Title',
    season: '1',
    episode: '3'
  }
});

Example: Complete Integration

import DashTracker from '@newrelic/video-dash';

// Initialize Dash.js player
const player = dashjs.MediaPlayer().create();
player.initialize(document.querySelector('#video'), manifestUrl, true);

// Initialize tracker
const tracker = new DashTracker(player, {
  info: {
    licenseKey: 'YOUR_LICENSE_KEY',
    beacon: 'YOUR_BEACON_URL',
    applicationID: 'YOUR_APP_ID'
  },
  config: {
    qoeAggregate: true
  }
});

// Set user context
tracker.setUserId('user-12345');

// Configure reporting interval
tracker.setHarvestInterval(30000);

// Send custom events
player.on('qualityChangeRendered', () => {
  tracker.sendCustom('QualityChanged', 'playing', {
    newQuality: player.getQualityFor('video'),
    timestamp: Date.now()
  });
});

Bitrate Metrics

The tracker captures four distinct bitrate metrics providing complete quality analysis:

Attribute	Description	Use Case
`contentBitrate`	Video-only bitrate (in bps) from the currently active video track, excluding audio	Monitor actual video quality being delivered
`contentManifestBitrate`	Maximum combined (video + audio) bitrate (in bps) as declared in the MPD manifest. Represents the highest possible stream variant	Understand maximum quality potential
`contentSegmentDownloadBitrate`	Network bandwidth (in bps) estimated by the player's ABR algorithm, based on measured download throughput	Analyze ABR decision-making
`contentNetworkDownloadBitrate`	Effective download throughput (in bps), calculated as (bytesDownloaded × 8) / downloadTime from the latest video segment request	Monitor real-time network performance

Bitrate Monitoring Example

// All bitrate metrics are automatically captured and sent with each event
// Access them in New Relic Insights queries:

// NRQL Query Examples:
// SELECT average(contentNetworkDownloadBitrate) FROM VideoAction WHERE actionName = 'CONTENT_HEARTBEAT'
// SELECT contentBitrate, contentSegmentDownloadBitrate FROM VideoAction WHERE actionName = 'CONTENT_RENDITION_CHANGE'

Data Model

The tracker captures comprehensive video analytics across three event types:

VideoAction - Playback events (play, pause, buffer, seek, quality changes, heartbeats)
VideoErrorAction - Error events (playback failures, network errors, media errors)
VideoCustomAction - Custom events defined by your application

Full Documentation: See DATAMODEL.md for complete event and attribute reference.

Support

Should you need assistance with New Relic products, you are in good hands with several support channels.

If the issue has been confirmed as a bug or is a feature request, please file a GitHub issue.

Support Channels

New Relic Documentation: Comprehensive guidance for using our platform
New Relic Community: The best place to engage in troubleshooting questions
New Relic University: A range of online training for New Relic users of every level
New Relic Technical Support: 24/7/365 ticketed support. Read more about our Technical Support Offerings

Contribute

We encourage your contributions to improve the Dash.js Tracker! Keep in mind that when you submit your pull request, you'll need to sign the CLA via the click-through using CLA-Assistant. You only have to sign the CLA one time per project.

If you have any questions, or to execute our corporate CLA (which is required if your contribution is on behalf of a company), drop us an email at opensource@newrelic.com.

For more details on how best to contribute, see CONTRIBUTING.md.

A note about vulnerabilities

As noted in our security policy, New Relic is committed to the privacy and security of our customers and their data. We believe that providing coordinated disclosure by security researchers and engaging with the security community are important means to achieve our security goals.

If you believe you have found a security vulnerability in this project or any of New Relic's products or websites, we welcome and greatly appreciate you reporting it to New Relic through our bug bounty program.

If you would like to contribute to this project, review these guidelines.

To all contributors, we thank you! Without your contribution, this project would not be what it is today.

License

The Dash.js Tracker is licensed under the Apache 2.0 License.

The Dash.js Tracker also uses source code from third-party libraries. Full details on which libraries are used and the terms under which they are licensed can be found in the third-party notices document.

Name		Name	Last commit message	Last commit date
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.github/workflows		.github/workflows
samples		samples
src		src
.babelrc		.babelrc
.eslintrc		.eslintrc
.gitignore		.gitignore
.prettierrc		.prettierrc
.releaserc.json		.releaserc.json
CHANGELOG.md		CHANGELOG.md
CONTRIBUTING.md		CONTRIBUTING.md
DATAMODEL.md		DATAMODEL.md
DEVELOPING.md		DEVELOPING.md
EULA.md		EULA.md
LICENSE.txt		LICENSE.txt
README.md		README.md
THIRD_PARTY_NOTICES.md		THIRD_PARTY_NOTICES.md
babel.config.js		babel.config.js
jest.config.js		jest.config.js
package-lock.json		package-lock.json
package.json		package.json
third_party_manifest.json		third_party_manifest.json
webpack.config.js		webpack.config.js

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New Relic Dash.js Tracker

Features

Table of Contents

Installation

Option 1: Install via NPM/Yarn

Option 2: Direct Script Include (Without NPM)

Prerequisites

Usage

Getting Your Configuration

Basic Setup

Advanced Configuration

Best Practices

1. Setting contentTitle

2. Setting userId

3. Adding Custom Attributes for Your Deployment

4. Gradual Rollout with Feature Flags

Configuration Options

QoE (Quality of Experience) Settings

Custom Data

API Reference

Core Methods

tracker.setUserId(userId)

tracker.setHarvestInterval(milliseconds)

tracker.sendCustom(actionName, state, attributes)

tracker.sendOptions(options)

Example: Complete Integration

Bitrate Metrics

Bitrate Monitoring Example

Data Model

Support

Support Channels

Contribute

A note about vulnerabilities

License

About

Resources

License

Code of conduct

Contributing

Security policy

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1. Setting `contentTitle`

2. Setting `userId`

`tracker.setUserId(userId)`

`tracker.setHarvestInterval(milliseconds)`

`tracker.sendCustom(actionName, state, attributes)`

`tracker.sendOptions(options)`

Packages