问题
I need to get raw frames from the Camera in YUV/YCbCr format on windows phone 8.1 (without Silverlight), I don't see any example on internet, is it possible using MediaCapture or CameraPreviewImageSource (Nokia SDK) ?
Thanks
回答1:
The recommended way to process raw video frames on Windows Phone 8.1 is to write a custom MFT plug-in and then add it to the MediaCapture object via AddEffectAsync. The MFT acts as a DSP filter between the decoder and the XAML rich compositor.
You can choose the color space that you want to support in your MFT and Media Foundation will automatically insert color space converters for you. Keep in mind that the color spaces available on the Phone are limited. That said, NV12 is the standard color space for most video devices and is considered a 4:2:0 YUV color space.
While this sounds simple in theory it can be quite complex in practice. MFTs must be writing in C++ / MoCom. Writing an MFT does require rather deep knowledge of C++ and COM. I don't want to scare you away from giving it a try but it does have a learning curve.
Here is a sample for Windows Store that shows you how to create a MFT plug-in and add it to the MediaCapture object. Unfortunately for whatever reason this sample did not get converted to a Universal app. However, it should be easy to do the conversion. Since this is such a seminal sample I will request that we publish it as a universal app.
Media capture using capture device sample
I hope this helps,
James
来源：https://stackoverflow.com/questions/26785463/raw-frames-windows-phone-8-1