Directshow VC配置和实例

配置步骤：

1) 安装directX sdk
2）打开安装目录下“../Samples/C++/DirectShow/BaseClasses/baseclasses.dsw"  编译它，成功后会生成“Debug_Unicode”目录，里面有我们需要的库“strmbasd.lib”

3）在VC++的Tools/Option/Directory的Include和Library中分别加入

Include：
C:/DXSDK/Include
C:/DXSDK/SAMPLES/C++/DIRECTSHOW/BASECLASSES
C:/DXSDK/SAMPLES/C++/COMMON/INCLUDE
Libarary：
C:/DXSDK/Lib
C:/DXSDK/SAMPLES/C++/DIRECTSHOW/BASECLASSES/DEBUG

注意一定要把directx的include文件和lib文件目录顺序提到最前

4）在Project/Setting/Link/ 中加入 strmbasd.lib uuid.lib winmm.lib

实例：

   打开vc创建一个控制台程序，按上面步骤配置好环境，输入一下代码：

#include <stdafx.h>
#include <Dshow.h>
#include "streams.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"C://Example.avi", NULL); // 打开一个媒体文件
    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();
}