IVMRWindowlessControl9::GetNativeVideoSize method (vmr9.h)

[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

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

[out] lpWidth

Pointer that receives the width of the native video rectangle.

[out] lpHeight

Pointer that receives the height of the native video rectangle.

[out] lpARWidth

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

[out] lpARHeight

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

Return value

The method returns an HRESULT. Possible values include those in the following table.

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.

Include DShow.h and D3d9.h before Vmr9.h.

Requirements

See also

IVMRWindowlessControl9 Interface

Using the Video Mixing Renderer