Win10 UWP自定义视频效果，IBasicVideoEffect

我正在尝试编写我自己的IBasicVideoEffect实现来分析Windows 10 UWP应用程序中的视频帧，最终目标是使用Zxing。. NET库扫描qr码。

我无法在我的代码中向mediaccapture实例添加视频效果。Win10QR.MainPage.cs中的var effect = await _mediaCapture.AddVideoEffectAsync(new VideoEffectDefinition(typeof(MyVideoEffect).FullName), MediaStreamType.VideoPreview);行抛出异常，声明"Class not registered (Exception from HRESULT: 0x80040154 (REGDB_E_CLASSNOTREG))"

MyVideoEffect.cs:

namespace Win10QR
{
    public class MyVideoEffect : IBasicVideoEffect
    {
        public bool IsReadOnly
        {
            get
            {
                return false;
            }
        }
        public IReadOnlyList<VideoEncodingProperties> SupportedEncodingProperties
        {
            get
            {
                var properties = new List<VideoEncodingProperties>();
                properties.Add(VideoEncodingProperties.CreateUncompressed("ARGB32", 640, 480));
                return properties;
            }
        }
        public MediaMemoryTypes SupportedMemoryTypes
        {
            get
            {
                return MediaMemoryTypes.GpuAndCpu;
            }
        }
        public bool TimeIndependent
        {
            get
            {
                return false;
            }
        }
        public void Close(MediaEffectClosedReason reason)
        {
        }
        public void DiscardQueuedFrames()
        {
        }
        public void ProcessFrame(ProcessVideoFrameContext context)
        {
            var resultString = AnalyzeBitmap(context.InputFrame.SoftwareBitmap);
            if (resultString != null)
            {
                Debug.WriteLine(resultString);
            }
        }
        public void SetEncodingProperties(VideoEncodingProperties encodingProperties, IDirect3DDevice device)
        {
        }
        public void SetProperties(IPropertySet configuration)
        {
        }
        private string AnalyzeBitmap(SoftwareBitmap bitmap)
        {
            var reader = new BarcodeReader();
            var writableBitmap = new WriteableBitmap(bitmap.PixelWidth, bitmap.PixelHeight);
            bitmap.CopyToBuffer(writableBitmap.PixelBuffer);
            var result = reader.Decode(writableBitmap);
            if (result != null)
            {
                return result.Text;
            }
            return null;
        }
    }
}

我试过var effect = await _mediaCapture.AddVideoEffectAsync(new VideoEffectDefinition("MyVideoEffect", MediaStreamType.VideoPreview);和var effect = await _mediaCapture.AddVideoEffectAsync(new VideoEffectDefinition("Win10QR.MyVideoEffect", MediaStreamType.VideoPreview);，两者都抛出与上面相同的异常。

然而，var effect = await _mediaCapture.AddVideoEffectAsync(new VideoEffectDefinition("Windows.Media.VideoStabilizationEffect", MediaStreamType.VideoPreview);似乎可以用于视频防抖。

出于好奇，我试着把任何旧类，例如:var effect = await _mediaCapture.AddVideoEffectAsync(new VideoEffectDefinition("Windows.UI.Xaml.DataTemplate", MediaStreamType.VideoPreview);和一个不同的异常抛出:"No such interface supported'r'n'r'nFailed to activate video effect"，这是有意义的。这使我相信我的接口实现不是问题所在。

我的包里有什么东西吗?appxmanifest或其他地方，我需要做什么才能找到我的视频效果类?这两个类都在Win10QR命名空间中。