IRenderEngine::GetFilterGraph 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 GetFilterGraph method retrieves the filter graph that the render engine has constructed, if any.
Syntax
HRESULT GetFilterGraph(
[out] IGraphBuilder **ppFG
);
Parameters
-
ppFG [out]
-
Receives a pointer to the filter graph's IGraphBuilder interface. It receives the value NULL if there is no filter graph.
Return value
Returns one of the following HRESULT values:
| Return code | Description |
|---|---|
|
Success. |
|
Render engine failed to initialize. |
|
Invalid pointer. |
Remarks
Use the IRenderEngine::ConnectFrontEnd method to build the front end of the filter graph. For preview, use the IRenderEngine::RenderOutputPins to complete the graph. For file output, connect the front end to a mux/file writer combination. For more information, see Rendering a Project.
The resulting graph can be run, paused, stopped, and seeked; the playback rate cannot be changed, however.
On return, if the value of *ppFG is non-NULL, the IGraphBuilder interface has an outstanding reference count. Be sure to release the interface when you are finished 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 |
|
| Library |
|
See also