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IVMRWindowlessControl::GetNativeVideoSize method

The GetNativeVideoSize method retrieves the un-stretched video size and aspect ratio of the video.

Syntax


HRESULT GetNativeVideoSize(
  [out]  LONG *lpWidth,
  [out]  LONG *lpHeight,
  [out]  LONG *lpARWidth,
  [out]  LONG *lpARHeight
);

Parameters

lpWidth [out]

Pointer that receives the width of the native video rectangle.

lpHeight [out]

Pointer that receives the height of the native video rectangle.

lpARWidth [out]

Pointer that receives the aspect ratio width of the native video rectangle.

lpARHeight [out]

Pointer that receives the aspect ratio height of the native video rectangle.

Return value

If the method succeeds, it returns S_OK. Returns E_POINTER if all four input parameters are NULL.

Return codeDescription
VFW_E_WRONG_STATE

The VMR is not in windowless mode.

 

Remarks

If the VMR is not connected to an upstream filter, this method will succeed but all parameters will be set to zero.

If lpWidth is 640 and lpHeight is 480, then lpARWidth will be 4 and lpARHeight will be 3.

Requirements

Minimum supported client

Windows XP with SP1 [desktop apps only]

Minimum supported server

Windows Server 2003 [desktop apps only]

Header

Strmif.h (include Dshow.h)

Library

Strmiids.lib

See also

Error and Success Codes
Using the Video Mixing Renderer
IVMRWindowlessControl Interface

 

 

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