ISmartRenderEngine::GetGroupCompressor method

[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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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.]

Note

[Deprecated. This API may be removed from future releases of Windows.]

 

The GetGroupCompressor method retrieves the compression filter for the specified group.

Syntax

HRESULT GetGroupCompressor(
   long        Group,
   IBaseFilter **pCompressor
);

Parameters

Group

Zero-based index of the group.

pCompressor

Receives a pointer to the IBaseFilter interface of the compression filter. It receives the value NULL if there is no compression filter.

Return value

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Remarks

Use this method to set properties on the compression filter, such as the key-frame rate. Call this method after calling IRenderEngine::ConnectFrontEnd, but before rendering the project. Then query the compression filter's output pin for the IAMVideoCompression interface, which contains methods for setting compression parameters. Release the interface when you are done. If you make any subsequent changes to the timeline, call ConnectFrontEnd, and then call GetGroupCompressor again to reset the compression parameters.

On return, if the value of *pCompressor is non-NULL, the IBaseFilter interface has an outstanding reference count. Be sure to release the interface when you are done using it.

Note

The header file Qedit.h is not compatible with Direct3D headers later than version 7.

 

Note

To obtain Qedit.h, download the Microsoft Windows SDK Update for Windows Vista and .NET Framework 3.0. Qedit.h is not available in the Microsoft Windows SDK for Windows 7 and .NET Framework 3.5 Service Pack 1.

 

Requirements

Requirement	Value
Header	Qedit.h
Library	Strmiids.lib

See also

ISmartRenderEngine Interface

Error and Success Codes