将 IMA DAI SDK 与 HTML5 客户端搭配使用

python3 -m http.server 8000

// StreamManager which will be used to request ad-enabled streams.
let streamManager;
...
function initPlayer() {
  videoElement = document.getElementById('video');
  adUiElement = document.getElementById('adUi');
  streamManager = new google.ima.dai.api.StreamManager(
    videoElement,
    adUiElement
  );
  streamManager.addEventListener(
      [
        google.ima.dai.api.StreamEvent.Type.LOADED,
        google.ima.dai.api.StreamEvent.Type.ERROR,
        google.ima.dai.api.StreamEvent.Type.AD_BREAK_STARTED,
        google.ima.dai.api.StreamEvent.Type.AD_BREAK_ENDED
      ],
      onStreamEvent, false);

  hls.on(Hls.Events.FRAG_PARSING_METADATA, function(event, data) {
    if (streamManager && data) {
      // For each ID3 tag in our metadata, we pass in the type - ID3, the
      // tag data (a byte array), and the presentation timestamp (PTS).
      data.samples.forEach(function(sample) {
        streamManager.processMetadata('ID3', sample.data, sample.pts);
      });
    }
  });

  videoElement.addEventListener('pause', () => {
    playButton.style.display = 'block';
  });

  playButton.addEventListener('click', initiatePlayback);
}

function initiatePlayback() {
  requestVideoStitcherStream();

  playButton.style.display = "none";
  playButton.removeEventListener('click', initiatePlayback);
  playButton.addEventListener('click', resumePlayback);
}
...

function requestVideoStitcherStream() {
  const streamRequest = new google.ima.dai.api.VideoStitcherLiveStreamRequest();
  streamRequest.liveStreamEventId = 'LIVE_CONFIG_ID';
  streamRequest.region = 'LOCATION';
  streamRequest.projectNumber = 'PROJECT_NUMBER';
  streamRequest.oAuthToken = 'OAUTH_TOKEN';
  streamRequest.networkCode = 'NETWORK_CODE';
  streamRequest.customAssetKey = 'CUSTOM_ASSET_KEY';

  streamManager.requestStream(streamRequest);
}

...

// The following session options are examples. Use session options
// that are compatible with your video stream.
streamRequest.videoStitcherSessionOptions = {
  "manifestOptions": {
    "bitrateOrder": "ascending"
  }
};

streamManager.requestStream(streamRequest);