directshow的简单示例

#include <dshow.h> #include <stdio.h> void main(void) { IGraphBuilder *pGraph = NULL; IMediaControl *pControl = NULL; IMediaEvent *pEvent = NULL; // Initialize the COM library. HRESULT hr = CoInitialize(NULL); if (FAILED(hr)) { printf("ERROR - Could not initialize COM library"); return; } // Create the filter graph manager and query for interfaces. hr = CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER, IID_IGraphBuilder, (void **)&pGraph); if (FAILED(hr)) { printf("ERROR - Could not create the Filter Graph Manager."); return; } hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl); hr = pGraph->QueryInterface(IID_IMediaEvent, (void **)&pEvent); // Build the graph. IMPORTANT: Change this string to a file on your system. hr = pGraph->RenderFile(L"D:\\Xunlei\\music\\[南拳妈妈原版KTV.MV合辑].南拳妈妈.-.[What.Can.I.Do].KTV.mpg", NULL); if (SUCCEEDED(hr)) { // Run the graph. hr = pControl->Run(); if (SUCCEEDED(hr)) { // Wait for completion. long evCode; pEvent->WaitForCompletion(INFINITE, &evCode); // Note: Do not use INFINITE in a real application, because it // can block indefinitely. } } pControl->Release(); pEvent->Release(); pGraph->Release(); CoUninitialize(); }