MacOS High Sierra includes a new version of Safari, Safari 11. This new version by default will remove support for auto-playing videos unless they are muted. If your desktop site currently autoplays unmuted video with the IMA SDK, your users will see the first frame of the ad, but the ad will not play. To resolve this, you can either change your implementation to click-to-play, or attempt to autoplay and revert to click-to-play if that fails. We've also added a new error that will fire if the SDK is asked to autoplay an ad but is prevented from doing so by the browser. Continue reading for more info on these solutions.

Click-to-play

The simple, advanced, and playlist IMA SDK samples use this click-to-play functionality. In short, you add a play button to your UI, and render that play button on page load. Your code should then delay calls to adDisplayContainer.initialize(), adsManager.init() and adsManager.start() until the user clicks that play button.

Attempt to autoplay

We've added a new sample to our GitHub repo, Attempt to Autoplay. This sample will autoplay ads if allowed, and if not, will follow the above click-to-play workflow. The sample starts by attempting to autoplay the content video. If autoplay succeeds, it pauses the content to play a pre-roll. This happens in an instant, so the users will not see any content actually play before the ads. If this autoplay attempt fails, the sample renders a play button and waits for the user to click that button to initialize the ad display container and play ads.

New error for failed autoplay

We've added AdError.ErrorCode.AUTOPLAY_DISALLOWED which the SDK will fire if it is asked to autoplay an ad but is prevented from doing so by the browser. You should not see this error if you've properly implemented one of the solutions above. This error is wrapped in a VIDEO_PLAY_ERROR; you can look for it as follows:

onAdError(adErrorEvent) {
  if (adErrorEvent.getError().getInnerError().getErrorCode() ==
      google.ima.AdError.ErrorCode.AUTOPLAY_DISALLOWED) {
    // The browser prevented the SDK from autoplaying an ad.
  }
}

If you have any questions, feel free to reach out to us on our support forum.