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quality-levels.html.example
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quality-levels.html.example
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<title>Video.js Sandbox</title>
<link href="../dist/video-js.css" rel="stylesheet" type="text/css">
<style>
.btn {
background-color: #5cb85c;
border-radius: 0.5em;
border: 1px solid #18ab29;
display: inline-block;
cursor: pointer;
color: #ffffff;
font-size: 1em;
padding: 0.5em;
margin: 0.25em 0.25em 0.25em 0;
}
.btn-success {
font-weight: bold;
background-color: #337ab7;
}
</style>
<script src="../dist/video.js"></script>
</head>
<body>
<div
style="background-color:#eee; border: 1px solid #777; padding: 10px; margin-bottom: 20px; font-size: .8em; line-height: 1.5em; font-family: Verdana, sans-serif;">
<p>You can use /sandbox/ for writing and testing your own code. Nothing in /sandbox/ will get checked into the repo,
except files that end in .example (so don't edit or add those files). To get started make a copy of
index.html.example and rename it to index.html.</p>
<pre>cp sandbox/index.html.example sandbox/index.html</pre>
<pre>npm run start</pre>
<pre>open http://localhost:9999/sandbox/index.html</pre>
</div>
<div style="width: 65%;">
<video-js id="vid1" controls preload="auto" class="vjs-fluid">
<source src="https://d2zihajmogu5jn.cloudfront.net/bipbop-advanced/bipbop_16x9_variant.m3u8"
type="application/x-mpegURL">
<p class="vjs-no-js">To view this video please enable JavaScript, and consider upgrading to a web browser that <a
href="https://videojs.com/html5-video-support/" target="_blank">supports HTML5 video</a></p>
</video-js>
</div>
<div id="currentLevelControl" style="width: 100%;">
<button id="autoBtn" type="button" class="btn btn-success">Auto</button>
</div>
<script>
const vid = document.getElementById('vid1');
const player = videojs(vid, {
qualityLevels: true
});
player.one('loadedmetadata', () => {
const container = document.getElementById('currentLevelControl');
const autoBtn = document.getElementById('autoBtn');
const btnList = [];
// create a button for every video quality level
for (let i = 0; i < player.qualityLevels().length; i++) {
let level = player.qualityLevels()[i];
if (level.width === undefined) {
continue;
}
let levelElm = document.createElement('button');
levelElm.classList.add('btn');
if (player.qualityLevels().selectedIndex === i) {
levelElm.classList.add('btn-success');
}
levelElm.setAttribute('title', level.label);
levelElm.setAttribute('type', 'button');
levelElm.setAttribute('data-level', i);
levelElm.innerText = `${i} ('${level.width}': ${level.height}p, ${(level.bitrate / 1024).toFixed(0)}kb)`;
btnList.push(levelElm);
container.append(levelElm);
}
// attach a click handler to buttons
for (const btn of btnList) {
btn.addEventListener('click', (event) => {
const selectedIndex = player.qualityLevels().selectedIndex;
const btnIndex = event.target.dataset.level;
autoBtn.classList.remove('btn-success');
if (selectedIndex == btnIndex) {
return;
}
btnList.forEach((elm) => {
player.qualityLevels()[elm.dataset.level].enabled = elm.dataset.level === btnIndex;
});
});
}
// update buttons on video quality changes
player.qualityLevels().on('change', (event) => {
for (let btn of btnList) {
if (btn.dataset.level == event.selectedIndex) {
btn.classList.add('btn-success');
} else {
btn.classList.remove('btn-success');
}
}
});
// add a click handler to reset previously selected video quality by the user
autoBtn.addEventListener('click', (event) => {
btnList.forEach((elm) => {
player.qualityLevels()[elm.dataset.level].enabled = true;
});
autoBtn.classList.toggle('btn-success', true);
});
});
</script>
</body>
</html>