A capture filter's video output pin should always implement this interface. For more implementation details regarding this interface, see Write a Video Capture Filter . Applications should use this interface all the time when capturing to update the current capture status. After capturing is done, applications should use this interface to determine the final capture results. Note Not all methods of this interface might be implemented.
Many filters only implement GetNumDropped and GetNumNotDropped .
Methods in Vtable Order IUnknown methods Description QueryInterface Retrieves pointers to supported interfaces. AddRef Increments the reference count. Release Decrements the reference count. IAMDroppedFrames methods Description GetNumDropped Retrieves the total number of frames that the pin dropped since it last started streaming. Retrieves an array of frame numbers that were dropped.