System Reference Clock

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

The System Reference Clock object implements a reference clock that returns the system time. If none of the filters in the graph provides a reference clock, the filter graph manager uses this component to synchronize the graph. Create this object by calling CoCreateInstance.

Label	Value
Class Identifier	CLSID_SystemClock
Interfaces	IAMClockAdjust, IReferenceClock, IReferenceClockTimerControl

 

Related topics

DirectShow Objects

Reference Clocks

Time and Clocks in DirectShow