|Microsoft DirectX 9.0|
The get_AvgTimePerFrame method retrieves the average time between successive frames.
HRESULT get_AvgTimePerFrame( REFTIME *pAvgTimePerFrame );
[out] Pointer to a variable of type REFTIME that receives the average frame time, in seconds.
Returns an HRESULT value.
This method returns the authored time per frame. This value is typically set by the source filter, which obtains it from information in the video stream itself. This value is not necessarily equal to the actual time per frame at which the video is rendered.
To retrieve the actual frame rate during playback, use the IQualProp::get_AvgFrameRate. For more information on actual versus authored frame rates, see the Remarks section for the VIDEOINFOHEADER structure.