node-ffmpeg/index.html at master · brunocamboim/node-ffmpeg · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Video HLS Adaptive streaming</title>
  <link href="//vjs.zencdn.net/7.10.2/video-js.min.css" rel="stylesheet">
  <script src="//vjs.zencdn.net/7.10.2/video.min.js"></script>
</head>
<body>
  <video
    id="my_video_1"
    class="video-js vjs-default-skin"
    type="application/x-mpegURL"
    src="./output/master.m3u8"
    width="640"
    height="268"
    controls>
  </video>
<script src="https://vjs.zencdn.net/8.3.0/video.min.js"></script>

<script>

  const video = document.querySelector('#my_video_1')
  const src   = video.getAttribute('src')
  const type  = video.getAttribute('type')

  const player = videojs(video)
  player.src({
    src: src,
    type: type
  })

  let qualityLevels = player.qualityLevels();

  // disable quality levels with less than 720 horizontal lines of resolution when added
  // to the list.
  qualityLevels.on('addqualitylevel', function(event) {
    let qualityLevel = event.qualityLevel;

    if (qualityLevel.height >= 720) {
      qualityLevel.enabled = true;
    } else {
      qualityLevel.enabled = false;
    }
  });

  // example function that will toggle quality levels between SD and HD, defining and HD
  // quality as having 720 horizontal lines of resolution or more
  let toggleQuality = (function() {
    let enable720 = true;

    return function() {
      for (let qualityLevel of qualityLevels) {
        if (qualityLevel.height >= 720) {
          qualityLevel.enabled = enable720;
        } else {
          qualityLevel.enabled = !enable720;
        }
      }
      enable720 = !enable720;
    };
  })();

  let currentSelectedQualityLevelIndex = qualityLevels.selectedIndex; // -1 if no level selected

  // Listen to change events for when the player selects a new quality level
  qualityLevels.on('change', function() {
    console.log('Quality Level changed!');
    console.log('New level:', qualityLevels[qualityLevels.selectedIndex]);
  });

</script>
</body>
</html>