mfvideosrc: Return S_OK from ISampleGrabberCB callback
The Microsoft's ISampleGrabber implementation seems to be ignoring the HRESULT return value from the callback though, S_OK is the right HRESULT code.
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The Microsoft's ISampleGrabber implementation seems to be ignoring the HRESULT return value from the callback though, S_OK is the right HRESULT code.