新手学DirectShow！遇到难题请各位来指点一下！

[zmrpro]

运行了一个程序，编译可以通过，但是连接就出错！

错误如下：
DS.obj: error LNK2001: unresolved external symbol _IID_IMediaEvent
DS.obj : error LNK2001: unresolved external symbol _IID_IMediaControl
DS.obj : error LNK2001: unresolved external symbol _CLSID_FilterGraph
DS.obj : error LNK2001: unresolved external symbol _IID_IGraphBuilder
Debug/DS.exe : fatal error LNK1120: 4 unresolved externals

[zmrpro]

那位指点一下吧！

[zmrpro]

#include "stdafx.h"
#include <dshow.h>

int main()
{
IGraphBuilder *pGraph;
IMediaControl *pMediaControl;
IMediaEvent *pEvent;

CoInitialize(NULL);

CoCreateInstance(CLSID_FilterGraph,NULL,CLSCTX_INPROC_SERVER,
IID_IGraphBuilder,(void **)&pGraph);

pGraph->QueryInterface(IID_IMediaControl,(void **)&pMediaControl);

pGraph->QueryInterface(IID_IMediaEvent,(void **)&pEvent);

pGraph->RenderFile(L"text.avi",NULL);

pMediaControl->Run();

long evCode;

pEvent->WaitForCompletion(INFINITE,&evCode);

pEvent->Release();

pMediaControl->Release();

pGraph->Release();

CoUninitialize();

return 0;
}

这个是原代码！

[wl3c]

up

[dreameasy]

非常非常非常常见的一个问题，相信搞directshow的人都碰到过.

解决办法:

(1)编译baseclasses这个工程,得到strmbasd.lib (debug版本)或者strmbase.lib(release版本)
(2)在link设置里面加上这个lib!
(3)完成！