IRenderEngine::RenderOutputPins 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 It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation.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 RenderOutputPins method creates the previewing portion of the filter graph.
Syntax
HRESULT RenderOutputPins();
Parameters
This method has no parameters.
Return value
Returns an HRESULT values. The following are possible values:
| Return code | Description |
|---|---|
|
Success. |
|
Cannot play back the audio stream. |
|
Invalid argument. |
|
Operation failed because project was not rendered successfully. |
|
Unexpected error. |
Remarks
Before calling this method, call IRenderEngine::ConnectFrontEnd to build the front end of the graph. To perform an operation other than preview, do not call this method. Instead, call IRenderEngine::GetGroupOutputPin to obtain pointers to the output pins.
If there is no sound card on the user's computer, this method returns VFW_S_AUDIO_NOT_RENDERED. There will not be audio preview in this case, but video preview is unaffected.
If the pin is from a video group, this method creates a video window. The calling thread must dispatch messages—for example, to move the window, or respond to mouse clicks in the window's client area.
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