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IDDrawExclModeVideo::GetNativeVideoProps

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Microsoft DirectShow 9.0

IDDrawExclModeVideo::GetNativeVideoProps

The GetNativeVideoProps method retrieves the current video size and picture aspect ratio of the Overlay Mixer's primary stream.

Syntax

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

Parameters

pdwVideoWidth

[out] Address of variable that receives the width of the video.

pdwVideoHeight

[out] Address of variable that receives the height of the video.

pdwPictAspectRatioX

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

pdwPictAspectRatioY

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

Return Values

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

Header: Declared in Strmif.h; include Dshow.h.

Library: Use Strmiids.lib.

See Also