Question

在我正在处理的过滤器应用中，我希望使用诺基亚成像SDK 1.1添加捕获图像并对其应用过滤器的功能。搜索互联网以获取代码，我得到了这个：

await _cameraEffect.PhotoCaptureDevice.SetCaptureResolutionAsync(PhotoCaptureDevice.GetAvailableCaptureResolutions(CameraSensorLocation.Back).First());
await _cameraEffect.PhotoCaptureDevice.FocusAsync();
CameraCaptureSequence sequence = _cameraEffect.PhotoCaptureDevice.CreateCaptureSequence(1);

MemoryStream imageStream = new MemoryStream();
imageStream.Seek(0, SeekOrigin.Begin);
sequence.Frames[0].CaptureStream = imageStream.AsOutputStream();

await _cameraEffect.PhotoCaptureDevice.PrepareCaptureSequenceAsync(sequence);
await sequence.StartCaptureAsync();
        _cameraEffect.PhotoCaptureDevice.SetProperty(KnownCameraPhotoProperties.LockedAutoFocusParameters,AutoFocusParameters.None);
imageStream.Seek(0, SeekOrigin.Begin);

IBuffer frameBuffer = imageStream.GetWindowsRuntimeBuffer();
var frameSize = new Windows.Foundation.Size(_cameraEffect.PhotoCaptureDevice.CaptureResolution.Width, _cameraEffect.PhotoCaptureDevice.CaptureResolution.Height);
var scanlineByteSize = (uint)frameSize.Width * 4;
var bitmap = new Bitmap(frameSize, ColorMode.Bgra8888, scanlineByteSize, frameBuffer);
var renderer = new BitmapRenderer(new FilterEffect { Filters = _cameraEffect._filterEffect.Filters }, bitmap);
await renderer.RenderAsync();

但是当我运行这段代码时，我得到一个＆＃34; {System.ArgumentException：参数不正确。

在Nokia.Graphics.Imaging.Bitmap..ctor（尺寸大小，ColorMode colorMode，UInt32 scanlineByteSize，IBuffer像素）在RealtimeFilterDemo.MainPage.d_ 1b.MoveNext（） ---从抛出异常的先前位置开始的堆栈跟踪结束--- 在System.Runtime.CompilerServices.AsyncMethodBuilderCore.b _0（对象状态）}＆＃34;。

它被抛出

var bitmap = new Bitmap(frameSize, ColorMode.Bgra8888, scanlineByteSize, frameBuffer);

这是否意味着frameBuffer无效？如果是这样，我该如何解决这个问题呢？我已经找到了一些关于这个问题的博客文章，但他们总结说他们必须使用

imageStream.Seek(0, SeekOrigin.Begin);

我已经添加了错误信息而没有任何更改。

位图中的ArgumentException（Size，ColorMode，Uint32，IBuffer）

0 个答案: