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Adding sample to show SCTE EMSG event capture from a live stream #2553

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Apr 25, 2018
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Adding sample to show SCTE EMSG event capture from a live stream #2553

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90 changes: 90 additions & 0 deletions samples/getting-started-basic-embed/listening-to-SCTE-EMSG-events.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8"/>
<title>Events example</title>

<script src="../../dist/dash.all.debug.js"></script>
<!--dash.all.min.js should be used in production over dash.all.debug.js
Debug files are not compressed or obfuscated making the file size much larger compared with dash.all.min.js-->
<!--<script src="../../dist/dash.all.min.js"></script>-->

<script>
var player;
const URL = "https://vm2.dashif.org/livesim/scte35_2/testpic_2s/Manifest.mpd";
const SCHEMEIDURI = "urn:scte:scte35:2013:xml";

function init() {

player = dashjs.MediaPlayer().create();
player.getDebug().setLogToBrowserConsole(false);
player.on(SCHEMEIDURI,showEvent);
player.initialize(document.querySelector("video"), URL, true);

}

function showEvent(e)
{
log("EVENT RECEIVED: " + e.type);
// We double process in order to pretty-print. Only two levels of object properties are exposed.
for (var name in e)
{

if (typeof e[name] != 'object') {
log(" " + name + ": " + e[name]);
}
}
for (name in e)
{
if (typeof e[name] == 'object' )
{
log(" " + name + ":");
for (name2 in e[name])
{
log(" " + name2 + ": " + JSON.stringify(e[name][name2]));
}
}
}
}


function log(msg) {
msg = msg.length > 200 ? msg.substring(0, 200) + "..." : msg; // to avoid repeated wrapping with large objects
var tracePanel = document.getElementById("trace");
tracePanel.innerHTML += msg + "\n";
tracePanel.scrollTop = tracePanel.scrollHeight;
console.log(msg);
}


</script>

<style>
video {
width: 640px;
height: 360px;
}
textarea {
width: 500px;
height:360px;
font-size: 10px;
}
</style>
</head>
<body>
<div>
This sample catches and displays SCTE-35 events embedded inside EMSG boxes. The live sample stream being used contains embedded events at 10s and 40s in to each minute of media time.
<p/>
</div>
<div>
<video controls="true">
</video>
<textarea id="trace" placeholder="Trapped events will be displayed here"></textarea>
</div>
<script>
document.addEventListener("DOMContentLoaded", function () {
init();
});
</script>
</body>
</html>