For more information, see Advanced Capture Topics. This is considered an advanced topic, however, and the Capture Graph Builder methods are preferred. However, it is possible to build capture graphs entirely by using IGraphBuilder methods. Throughout this section on video capture, it is assumed that you are using the Capture Graph Builder to create the capture graph. *ppGraph = pGraph // The caller must release both interfaces. Return both interface pointers to the caller. Hr = CoCreateInstance(CLSID_FilterGraph, 0, CLSCTX_INPROC_SERVER,
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HRESULT hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,ĬLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void**)&pBuild ) ICaptureGraphBuilder2 **ppBuild // Receives the pointer. IGraphBuilder **ppGraph, // Receives the pointer.
Initializing external capture plugins code#
The following code shows a helper function to perform these steps: HRESULT InitCaptureGraphBuilder( The following diagram illustrates this process. However, Wireshark does recognize the plugin on an older Mac running Mojave. In spite of that, Wireshark still doesn't recognize this capture plugin on the Mac configuration running Catalina listed above. I presume the interface line right after the extcap line is what you're looking for. Then initialize the Capture Graph Builder by calling ICaptureGraphBuilder2::SetFiltergraph with a pointer to the Filter Graph Manager's IGraphBuilder interface. Here's the log of the command line script from the first. Start by calling CoCreateInstance to create new instances of the Capture Graph Builder and the Filter Graph Manager. The following diagram illustrates the Capture Graph Builder and the ICaptureGraphBuilder2 interface. The Capture Graph Builder exposes the ICaptureGraphBuilder2 interface, which contains methods for building and controlling a capture graph. To make it easier for applications to build capture graphs, DirectShow provides a helper object called the Capture Graph Builder.
![initializing external capture plugins initializing external capture plugins](https://microchipdeveloper.com/local--files/machine-learning:ml-plugin/project-config.png)
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Capture graphs are often more complicated than file playback graphs. A filter graph that performs video or audio capture is called a capture graph.