HarmonyOS 获取视频缩略图无法显示？

Question

本地有一个录像文件获取视频的缩略图成功但是无法用Image渲染，image返回的错误信息：

empty sourceFailed to create image loader, Image source type not supported  

文档用的是：https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/avimagegenerator-V5

Answer 1

可以参考demo：

@Entry
@Component
struct Index {
  @State src: PixelMap | undefined = undefined;

  aboutToAppear(): void {
    this.example();
  }

  async example() {
    console.info('getThumbnailDemo');
    let phAccessHelper = photoAccessHelper.getPhotoAccessHelper(getContext());
    let predicates = new dataSharePredicates.DataSharePredicates();
    let fetchResult = await phAccessHelper.getAssets({
      fetchColumns: [],
      predicates: predicates
    });
    const asset = await fetchResult.getFirstObject();
    console.info('asset displayName = ', asset.displayName);
    asset.getThumbnail((err, pixelMap) => {
      if (err == undefined) {
        console.info('getThumbnail successful ' + pixelMap);
        this.src = pixelMap;
      } else {
        console.error('getThumbnail fail', err);
      }
    });
  }
  build() {
    Column() {
      Image(this.src).width(100).height(100)
    }
  }
}