Microsoft DirectX 9.0


The StreamTime method retrieves the current stream time.


virtual HRESULT StreamTime(
    CRefTime& rtStream



Reference to a CRefTime object that receives the current stream time.

Return Value

Returns an HRESULT value. Possible values include those listed in the following table.

Value Description
S_OK Success.
VFW_E_NO_CLOCK No reference clock is available.


Stream time is defined as the current reference time (as given by the reference clock) minus the start time (specified by CBaseFilter::m_tStart). A media sample's time stamp specifies the stream time when it should be rendered. If a sample with a time stamp less than the current stream time has not yet been rendered, it is late.

See Also