UWP视频导入

Question

我正在尝试将视频导入UWP画布。 我有这个代码，成功导入图片： 私人异步无效AddImageButton_Click（对象发件人，RoutedEventArgs e） { 图片MyImage = new Image（）;

 var picker = new FileOpenPicker(); 
     picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; 
     picker.FileTypeFilter.Add(".jpg"); 
     picker.FileTypeFilter.Add(".png"); 

     StorageFile file = await picker.PickSingleFileAsync(); 

     if (file != null) 
     { 
      StorageApplicationPermissions.FutureAccessList.AddOrReplace("PickedFolderToken", file); 
      // var files = await file.GetFilesAsync(); 
      var bitmap = new BitmapImage(); 

      var stream = await file.OpenReadAsync(); 

      // AddHandler(, new ExceptionRoutedEventHandler(Bitmap_ImageFailed), true); 
      bitmap.ImageFailed += Bitmap_ImageFailed; 
      await bitmap.SetSourceAsync(stream); 
      MyImage.Source = bitmap; 

      AddHandler(ManipulationStartedEvent, new ManipulationStartedEventHandler(Image_ManipulationStarted), true); 
      AddHandler(ManipulationDeltaEvent, new ManipulationDeltaEventHandler(Image_ManipulationDelta), true); 
      AddHandler(ManipulationCompletedEvent, new ManipulationCompletedEventHandler(Image_ManipulationCompleted), true); 

      ManipulationMode = ManipulationModes.All; 
      MyImage.RenderTransform = ImageTransforms; 


      parentCanvas.Children.Add(MyImage); 
     } 

    } 

我试着调整它来导入视频，但在将位图转换为MediaPlayerElement时卡住了。有什么建议么？

谢谢！

Answer 1

根据您上面添加图片到Canvas的代码，你可以试试下面的代码添加MediaPlayerElement到画布上，并使用FileOpenPicker到选择器中的媒体文件作为MediaPlayerElement的来源。您可以进行一些修改以满足您的要求。

private async void AddMediaPlayerElementButton_Click_1(object sender, RoutedEventArgs e) 
{ 
    var picker = new FileOpenPicker(); 
    picker.SuggestedStartLocation = PickerLocationId.PicturesLibrary; 
    picker.FileTypeFilter.Add(".mp4"); 
    StorageFile file = await picker.PickSingleFileAsync(); 
    MediaPlayerElement mediaPlayer = new MediaPlayerElement() { AreTransportControlsEnabled = true }; 
    if (file != null) 
    { 
     mediaPlayer.Source = MediaSource.CreateFromStorageFile(file); 
    } 
    parentCanvas.Children.Add(mediaPlayer); 
}