IDDrawExclModeVideo::GetNativeVideoProps method (strmif.h)

Article
02/22/2024

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetNativeVideoProps method retrieves the current video size and picture aspect ratio of the Overlay Mixer's primary stream.

Syntax

HRESULT GetNativeVideoProps(
  [out] DWORD *pdwVideoWidth,
  [out] DWORD *pdwVideoHeight,
  [out] DWORD *pdwPictAspectRatioX,
  [out] DWORD *pdwPictAspectRatioY
);

Parameters

[out] pdwVideoWidth

Address of variable that receives the width of the video.

[out] pdwVideoHeight

Address of variable that receives the height of the video.

[out] pdwPictAspectRatioX

Address of variable that receives the x-axis aspect ratio.

[out] pdwPictAspectRatioY

Address of variable that receives the y-axis aspect ratio.

Return value

Returns an HRESULT value. Possible values include the following.

Return code	Description
S_OK	Success.
E_INVALIDARG	Argument is invalid.

Remarks

The filter graph should look for the EC_VIDEO_SIZE_CHANGED event, and on its receipt call this method to adjust the aspect ratio and position.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	strmif.h (include Dshow.h)
Library	Strmiids.lib