HarmonyOS获取相册视频的宽高问题

phAccessHelper.getAssets(fetchOptions) 
  .then((fetchResult: photoAccessHelper.FetchResult<photoAccessHelper.PhotoAsset>) => { 
    fetchResult.getFirstObject().then((photoAsset: photoAccessHelper.PhotoAsset) => { 
      let srcWidth = photoAsset.get(photoAccessHelper.PhotoKeys.WIDTH) as number; 
      let srcHeight = photoAsset.get(photoAccessHelper.PhotoKeys.HEIGHT) as number; 
    }) 
  });
1.
2.
3.
4.
5.
6.
7.