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我做了下面的代碼的剪切和粘貼關於如何使用CameraPreviewImageSource和訪問預覽緩衝區框架,但不工作,它似乎幀緩衝區大小爲0x0讀取OnPreviewFrameAvailable事件的IImageSize參數的值。CameraPreviewImageSource空預覽框
How to get preview buffer of MediaCapture - Universal app
protected override void OnNavigatedTo(NavigationEventArgs e)
{
InitializeAsync();
}
public async void InitializeAsync()
{
_cameraPreviewImageSource = new CameraPreviewImageSource();
await _cameraPreviewImageSource.InitializeAsync(string.Empty);
var properties = await _cameraPreviewImageSource.StartPreviewAsync();
var width = 640.0;
var height = 480;
_writeableBitmap = new WriteableBitmap((int)width, (int)height);
_writeableBitmapRenderer = new WriteableBitmapRenderer(_cameraPreviewImageSource, _writeableBitmap);
Initialized = true;
_cameraPreviewImageSource.PreviewFrameAvailable += OnPreviewFrameAvailable;
}
private async void OnPreviewFrameAvailable(IImageSize args)
{
System.Diagnostics.Debug.WriteLine("ww:"+args.Size.Width+" hh:"+args.Size.Height);
// Prevent multiple rendering attempts at once
if (Initialized && !_isRendering)
{
_isRendering = true;
try
{
await _writeableBitmapRenderer.RenderAsync();
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine("\n\n"+ex.Message);
System.Diagnostics.Debug.WriteLine(ex.StackTrace);
}
_isRendering = false;
}
}
功能(攝像頭&麥克風)上Package.appxmanifest已選定
實施CameraPreviewImageSource上的Silverlight應用程序的偉大工程!
您看到了什麼錯誤? – 2015-02-25 08:56:00
嗨, 誤差如下: 的操作試圖在有效範圍之外訪問數據(從HRESULT異常:0x8000000B) WW:0小時:0 線程量0xDB4已經退出,代碼0(爲0x0)。 在System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(任務task) 在System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(任務task) 在System.Runtime.CompilerServices.TaskAwaiter'1.GetResult() 在AugmentedReality.MainPage 。 d__19.MoveNext() 這似乎發生幀的大小爲0 x 0或空。 –
Jano
2015-02-26 09:27:00
你在做什麼設備?我曾經見過類似的東西,但它是設備特定的... – 2015-02-26 15:13:45