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Prepares the capture sink by loading any required pipeline components, such as encoders, video processors, and media sinks.
Syntax
HRESULT Prepare();
Return value
This method can return one of these values.
| Return code | Description |
|---|---|
|
Success. |
|
Invalid request. |
Remarks
Calling this method is optional. This method gives the application an opportunity to configure the pipeline components before they are used. The method is asynchronous. If the method returns a success code, the caller will receive an MF_CAPTURE_SINK_PREPARED event through the IMFCaptureEngineOnEventCallback::OnEvent method. After this event is received, call IMFCaptureSink::GetService to configure individual components.
Before calling this method, configure the capture sink by adding at least one stream. To add a stream, call IMFCaptureSink::AddStream.
The Prepare method fails if the capture sink is currently in use. For example, calling Prepare on the preview sink fails if the capture engine is currently previewing.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 8 [desktop apps only] |
| Minimum supported server | Windows Server 2012 [desktop apps only] |
| Target Platform | Windows |
| Header | mfcaptureengine.h |