IMFVideoDisplayControl::GetNativeVideoSize method (evr.h)

项目
12/05/2018

[The component described on this page, Enhanced Video Renderer, is a legacy feature. It has been superseded by the Simple Video Renderer (SVR) exposed through the MediaPlayer and IMFMediaEngine components. To play video content you should send data into one of these components and allow them to instantiate the new video renderer. These components have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer or the lower level IMFMediaEngine APIs to play video media in Windows instead of the EVR, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]

Gets the size and aspect ratio of the video, prior to any stretching by the video renderer.

Syntax

HRESULT GetNativeVideoSize(
  [in, out] SIZE *pszVideo,
  [in, out] SIZE *pszARVideo
);

Parameters

[in, out] pszVideo

Receives the size of the native video rectangle. This parameter can be NULL.

[in, out] pszARVideo

Receives the aspect ratio of the video. This parameter can be NULL.

Return value

The method returns an HRESULT. Possible values include, but are not limited to, those in the following table.

Return code	Description
S_OK	The method succeeded.
E_POINTER	At least one of the parameters must be non-NULL.
MF_E_SHUTDOWN	The video renderer has been shut down.

Remarks

If no media types have been set on any video streams, the method succeeds but all parameters are set to zero.

You can set pszVideo or pszARVideo to NULL, but not both.

Requirements

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	evr.h
Library	Strmiids.lib

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