This tutorial provides a step-by-step guide to using Streamroot DNA™ with dash.js, the reference MPEG-DASH player developed and maintained by DASH-IF.

We have built an optimized wrapper for Dash.js from v2.6.0.

Not into tutorials?

Step 1: Install Dash.js and Streamroot build

From our CDN

Include these sources in the HTML <head>:

<!-- Dash.js build -->
<script src="//cdn.dashjs.org/v2.9.2/dash.all.min.js"></script>

<!-- Streamroot wrapper -->
<script src="//cdn.streamroot.io/dashjs-dna-wrapper/1/stable/dashjs-dna-wrapper.js"></script>

Using npm

Install runtime and dev dependencies:

npm install @streamroot/dashjs-dna-wrapper

In your application, import/require the package you want to use, similar to this example:

import DashDnaWrapper from '@streamroot/dashjs-dna-wrapper';

Step 2: Set up Dash.js and Streamroot

In the HTML <body> or with npm

<video id="demoplayer"></video>
<script>
    var player = dashjs.MediaPlayer().create();
    var dnaConfig = {};
    var wrapper = new DashjsDnaWrapper(player, 'YOUR_STREAMROOT_KEY', dnaConfig);
    var videoElement = document.getElementById("demoplayer");
    player.getDebug().setLogToBrowserConsole(false);
    player.initialize(videoElement, 'YOUR_PLAYLIST_URL', true);
</script>

Parameter name	Mandatory	Description
dnaConfig	No	The object in which you can pass Streamroot options (property, contentIdGenerator, id, etc.).
YOUR_STREAMROOT_KEY	Yes	The unique Streamroot key that we have assigned to you; make sure it is identical to the one provided in the Account section of your dashboard.
YOUR_PLAYLIST_URL	Yes	Your DASH playlist.

Step 3: Visualize Streamroot

In order to verify if Streamroot was correctly configured, please install our DNA Graphs.

Recommended dash.js options

To get the best performance with live content, we recommend setting the following value in the player options:

// 30s latency
player.setLiveDelay(30);

// Or 15 fragments, in the case fragment duration is 2s
player.setLiveDelayFragmentCount(15);

Streamroot DNA module currently has compatibility issues when BOLA is activated on live streams. However, VoD is fine. We highly recommend you to deactivate BOLA for live streaming (including DVR streams).

For versions 2.6.0 and later, by default dash.js dynamically switches between throughput based rules and BOLA. Use mediaPlayer.setABRStrategy("abrThroughput") to disable BOLA (see dash.js documentation).

If you are going to discard or not use the MediaEngine instance anymore, please make sure to clean the Streamroot DNA wrapper manually, using : DashJsDnaWrapper.destroy().

For example:

// Reset the player before discarding it
player.reset();

// Destroy the wrapper
wrapper.destroy();

// It is not recommended to use your player after this.

Dash.js