IFilterGraph::SetDefaultSyncSource method (strmif.h)

The SetDefaultSyncSource method sets the reference clock to the default clock.


HRESULT SetDefaultSyncSource();

Return value

Returns an HRESULT value. Possible values include the following:

Return code Description
The filter graph is not stopped.


This method instructs the Filter Graph Manager to choose a reference clock using its default algorithm. For more information about the algorithm that it uses, see Reference Clocks.

Usually you do not need to call this method, because the Filter Graph Manager automatically selects a clock. However, if you call IMediaFilter::SetSyncSource to override the clock, you can use SetDefaultSyncSource to restore the default clock.

This method fails if the filter graph is running or paused.


Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header strmif.h (include Dshow.h)
Library Strmiids.lib

See also

Error and Success Codes

IFilterGraph Interface

Time and Clocks in DirectShow