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IMSVidPlayback::get_Rate

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Microsoft DirectShow 9.0

IMSVidPlayback::get_Rate

This topic applies to Windows XP or later.

The get_Rate method retrieves the playback rate.

Syntax

  HRESULT get_Rate(
  double*  plRate
);

Parameters

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 Values

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

Value Description
E_POINTER NULL pointer argument.
ERROR_INVALID_STATE The graph is not built. Call the Build or View method on the Video Control.
S_OK The method succeeded.
  • Note   The value ERROR_INVALID_STATE is converted to an HRESULT with the HRESULT_FROM_WIN32 macro.

Requirements

  Header: Dshow.h.

  Library: Quartz.dll.

See Also