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IMSVidPlayback::get_Length Method

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This topic applies to Windows XP or later.
The get_Length method retrieves the length of the playback source.

Syntax

HRESULT get_Length(
  [out]  long *lLength
);

Parameters

  • lLength [out]
    Pointer to a variable that receives the length. The units for the returned value are determined by the current position mode.

    Position Mode Returned Value
    FrameMode Frame number
    TenthsSecondsMode Hundredths of seconds

    To set the position mode, call IMSVidPlayback::put_PositionMode.

Return Value

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

Return code Description

E_NOINTERFACE

The source does not support getting the length.

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.

Remarks

Call the IMSVidCtl::Build or IMSVidCtl::View method before calling this method.

Requirements

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

See Also

IMSVidPlayback Interface

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Build date: 12/4/2008