const options: XrFrame.IShareRecordOptions = {
  fps: 30,
  width: scene.width,
  height: scene.height,
  videoBitsPerSecond: 1000
};

// 启动录制
await scene.share.recordStart(options);

// 停止录制，直接保存到相册
await scene.share.recordFinishToAlbum(options);

保存到相册的视频，中间丢帧丢的厉害