从视频文件获取图像

Question

我想从服务器加载的视频文件中获取图像，因为我在组件中使用了ngx-image-uploader标记。

我在我的课程 video.component.ts 中使用此功能：

openEditContentLayout(content: any, itemContent: any) {
    console.log(itemContent.file)//it prints in my console like this : http://ipServer:port/myVideo.mp4 

    this.selectedSection = itemContent;
    this.uploadedImageUrl = null;
    console.log(this.selectedSection);
    this.layoutFormContainer.patchValue({
      title: itemContent.title,
      content: itemContent.content,
      file: itemContent.file //in this level that I wish get an image from my video
    });
    this.modalService.open(content, { size: 'lg' }).result.then(() => {
      this.selectedSection.title = this.layoutFormContainer.get('title').value;
      this.selectedSection.content = this.layoutFormContainer.get('content').value;
      this.selectedSection.image = this.uploadedImageUrl ?
        this.uploadedImageUrl : this.layoutFormContainer.get('image').value;
    }, () => {
    });
  }

这是 video.component.html

<ngx-image-uploader [options]="options" name="imageLayout" (upload)="onUpload($event)" formControlName="file"></ngx-image-uploader>