安装DirectShow过程&常见问题&实例

1.下载DirectShow SDK，该工程用的是2004 summer版本，安装到C:\Program Files (x86)\下路径为Path；

2.在Path\Samples\C++\DirectShow\BaseClasses内新建Debug文件夹，用于保存Debug信息；

3.进入Project->Properties->VC++ Directories内，在Include Directories内添加Path\Include路径；在Liabrary Directories内添加Paht\Lib路径;在Liabrary Directories内添加Path\Samples\C++\DirectShow\BaseClasses\Debug路径（因为后面调用这里面的库）;

4.进入Path\Samples\C++\DirectShow\BaseClasses\baseclasses.sln，编译debug得到Strmbasd.lib。

该过程可能出现以下问题：

a. BaseClasses\ctlutil.h(278): error C4430:缺少类型说明符 - 假定为int。注意c++不支持默认int；

解决方法：将COARefTime(LONG); operator=(LONG);修改成COARefTime & operator=(LONG);编译后又出现以下问题

b.wxdebug.cpp(567): error C4430:缺少类型说明符 - 假定为int。注意c++不支持默认int；

解决方法：将static
g_dwLastRefresh=0;修改成static DWORD g_dwLastRefresh=0;

c.winutil.cpp(2104):error C2065:"Count":未声明的标识符

解决方法：将for(UINT
Count=0;Count<Result;Count++)修改成

UINT
Count;

for( Count=0;Count<Result;Count++)

d.outputq.cpp(664):error C2065:"iDont":未声明的标识符

解决方法：将for(long
iDone=0;修改成

long
iDone;

for(iDone=0;

5.在Project->Properties->Linker->Input->Addaitional
Dependencies内添加Strmbasd.lib；

6.新建工程Player

copy以下代码：

#include <iostream>

#include <dshow.h>

using namespace std;

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"F:\\电影\\绣春刀.HD1280高清国语中英双字.mp4", 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();

}

7.运行就可以播放视频。