IMSVidPlayback::get_Rate Method

This topic applies to Windows XP or later.
The get_Rate method retrieves the playback rate.


HRESULT get_Rate(
  [out]  double *plRate


  • plRate [out]
    Pointer to a variable that receives the playback rate, as a ratio to the authored rate. For example, 0.5 means half the normal speed, 1.0 means normal speed, and 2.0 means twice the normal speed.

Return Value

The method returns an HRESULT. Possible values include the following.

Return code Description


NULL pointer argument.


The graph is not built. Call the Build or View method on the Video Control.


The method succeeded.

Note  The value ERROR_INVALID_STATE is converted to an HRESULT with the HRESULT_FROM_WIN32 macro.


Header Declared in Dshow.h.
DLL Requires Quartz.dll.

See Also

IMSVidPlayback Interface

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Build date: 12/4/2008