GetPreviewBufferTexture抛出异常

问题描述

您好，

我正在使用ICameraCaptureDeviceNative界面来填充直接X  2D纹理和摄像机的内容。  使用以下参数创建纹理，并通过调用ICameraCaptureDeviceNative :: SetDevice（...）初始化相机：

I am using the ICameraCaptureDeviceNative interface to fill a Direct X 2D texture with the contents of the video camera.  The texture is created with the following parameters and the camera is initialized with a call to ICameraCaptureDeviceNative::SetDevice(...):

m_d3dDevice->CreateTexture2D(&CD3D11_TEXTURE2D_DESC(
						DXGI_FORMAT_B8G8R8A8_UNORM,
						1280,        // Width
						720,        // Height
						1,          // MipLevels
						1,          // ArraySize
						D3D11_BIND_SHADER_RESOURCE | D3D11_BIND_RENDER_TARGET),
				nullptr,
				&m_texture)
				);

...

m_camera->SetDevice(m_d3dDevice.Get(), m_d3dContext.Get());

当调用方法 ICameraCaptureDeviceNative :: GetPreviewBufferTexture  时，要使用摄像机的内容填充纹理，会抛出以下异常：

When the method ICameraCaptureDeviceNative::GetPreviewBufferTexture is invoked, to fill the texture with the video camera's contents, the following exception is thrown:

相机预览设置为与纹理相同的宽度，高度和格式。  是否还需要一些其他初始化代码才能生效？

The camera preview is set to the same width, height and format as the texture.  Is there some other initialization code that is needed for this to work?

谢谢

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