HTMLVideoElement: cancelVideoFrameCallback() 方法

cancelVideoFrameCallback(id)

let videoCallbackId = null;

function updateCanvas(now, metadata) {
  // Do something with the frame

  // …

  // Re-register the callback to run on the next frame
  // It's important to update the videoCallbackId on each iteration
  // so you can cancel the callback successfully
  videoCallbackId = video.requestVideoFrameCallback(updateCanvas);
}

// Initial registration of the callback to run on the first frame
videoCallbackId = video.requestVideoFrameCallback(updateCanvas);

// …

// Cancel video frame callback using the latest videoCallbackId
if (videoCallbackId !== null) {
  video.cancelVideoFrameCallback(videoCallbackId);
}