SetCurrentMediaType() not triggering MF_SOURCE_READERF_CURRENTMEDIATYPECHANGED

Hi,

Currently using MFC for my application, I would like to change the current MediaType used by my webcam at runtime (dynamically).

These are the steps of my algorithm:

1.) Create a IMFMediaSource and configure it

2.) Create an IMFSourceReader using the IMFMediaSource above

3.) Use SetCurrentMediaType() to select the media format

4.) Use readSample() method to retrieve samples.

Now, I would like to change my video format after few calls of readSample() (when the user select another video format in my GUI for instance).

I call again the SetCurrentMediaType() on the desired video format. On the next call of readSample, I'm expecting to retrieve MF_SOURCE_READERF_CURRENTMEDIATYPECHANGED on the flags, but it never happen.

Finally, I'm able to get a IMFSample, but it is totally broken (image is totally distorted).

The workaround I've found in some code here (http://svn.openrtm.org/ImageProcessing/trunk/ImageProcessing/opencv/components/MFCamera/src/MFCapture.cpp) is to destroy the IMFSourceReader and to recreate another one.

I'm wondering if this is the normal functioning of this API or if I'm missing something.

Thanks in advance, best regards.