MFPKEY_TOTALFRAMES Property

Specifies the total number of video frames passed to the encoder during the endocing process.

Constant for IPropertyBag

g_wszWMVCTotalFrames

VT_I4

You can get this value after you are finished passing samples.

Requirement	Value
Minimum supported client	Windows XP [desktop apps only]
Minimum supported server	Windows Server 2003 [desktop apps only]
Header	Wmcodecdsp.h