Directshow SDK中的示例代码有小错误

最新推荐文章于 2025-08-12 13:30:34 发布

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博客给出了创建Capture Graph Builder的代码示例，定义了IGraphBuilder和ICaptureGraphBuilder2指针，使用CoCreateInstance函数进行创建，但代码中存在将指针赋值对象写错的问题。

ms-help://MS.MSDNQTR.2003APR.1033/directx9_c/directx/htm/aboutthecapturegraphbuilder.htm

IGraphBuilder *pGraph = NULL;
    ICaptureGraphBuilder2 *pBuild = NULL;

    // Create the Capture Graph Builder.
    HRESULT hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
        CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void**)&pGraph); //有错误应该是pBuild
IGraphBuilder *pGraph = NULL;
    ICaptureGraphBuilder2 *pBuild = NULL;

    // Create the Capture Graph Builder.
    HRESULT hr = CoCreateInstance(CLSID_CaptureGraphBuilder2, NULL,
        CLSCTX_INPROC_SERVER, IID_ICaptureGraphBuilder2, (void**)&pGraph);