各位朋友多指教（ DIRECTSHOW）

[fxmgo]

我用 DSPack组件，c++Builder做视频捕获，不知道为什么，总是 编译连接时出现一错误： [Linker Error] Unresolved external '_PIN_CATEGORY_PREVIEW' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\TESTCAP.OBJ
不知道为什么？我编译运行DSPack下的playcap例子正常. 请指教呀

[zihan]

还有你用那个builder all试试,如果不行,,可能是你没有把相应的lib文件加到工程当中

[halibut]

把BCB的lib路径设为第一个试试!!!

[zhpsam109]

把工程另寸到另外的地方，然后重新编译！

[swites]

我觉得没那么简单,可能是越界或者是非正常操作引起.

[fxmgo]

哎！！！没人知道？？？？

[IAMCDYY2003]

应该是LIB文件的关系，不太可能是什么越界

[weibz0525]

1.project->option->Linker,use dynamic RTL 对号去掉
2.project->Option->Packages, Build with Runtime Packages 对号去掉

[fxmgo]

去掉以后，出现以下错误：
[Linker Error] Unresolved external 'AMGetErrorTextA' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\LIB\DSPACK_BCB6.LIB|E:\cbdshow\DSPACK231\src\DSPack\DSUtil.pas
[Linker Error] Unresolved external '_PIN_CATEGORY_PREVIEW' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\TESTCAP.OBJ
[Linker Error] Unresolved external 'Direct3DCreate9' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\LIB\DIRECTX9_BCB6.LIB|E:\cbdshow\DSPACK231\src\DirectX9\Direct3D9.pas
[Linker Error] Unresolved external 'WMCreateWriterNetworkSink' referenced from D:\PROGRAM FILES\BORLAND\CBUILDER6\PROJECTS\LIB\DSPACK_BCB6.LIB|E:\cbdshow\DSPACK231\src\DSPack\DSPack.pas

[我不懂电脑]

删掉*.obj,*.exe重新builder

[yaosir]

link=true;
ghCapWnd = capCreateCaptureWindow( "Capture Window",
WS_CHILD|WS_VISIBLE|WS_EX_CLIENTEDGE|WS_EX_DLGMODALFRAME, 0, 0, 800, 600, Panel1->Handle, 0);
if(ghCapWnd)
{
if (!capDriverConnect (ghCapWnd, 0))
{
MessageBox(NULL, TEXT("连接图像卡失败"), TEXT("错误提示"), MB_OK);
}
else
{
capSetCallbackOnFrame(ghCapWnd,NULL);
capDriverConnect(ghCapWnd,0);
/*
capSetCallbackOnVideoStream(hWndC,NULL);
CapSetCallbackOnError(hWndC,NULL);
CapSetCallbackOnStatus(hWndC,NULL); //*/
//* CAPTUREPARMS CapParms;
CapParms.dwRequestMicroSecPerFrame=40000;
CapParms.fLimitEnabled = FALSE;
CapParms.fCaptureAudio = FALSE; // NO Audio
CapParms.fMCIControl = FALSE;
CapParms.fYield = TRUE;
CapParms.vKeyAbort = VK_ESCAPE;
CapParms.fAbortLeftMouse = FALSE;
CapParms.fAbortRightMouse = FALSE;
capCaptureSetSetup(ghCapWnd,&CapParms,sizeof(CAPTUREPARMS)); // */
CapParms.wNumVideoRequested=(CapParms.fUsingDOSMemory ? 32:1000);//API
capCaptureSetSetup(ghCapWnd,&CapParms,sizeof(CAPTUREPARMS));//API

capPreviewScale(ghCapWnd,1);
capPreviewRate(ghCapWnd,66);
capCaptureSequenceNoFile(ghCapWnd);
capOverlay(ghCapWnd, 1);
capPreview(ghCapWnd, 1);
Sleep(300);
capCaptureAbort(ghCapWnd);
Sleep(300);
capOverlay(ghCapWnd, 1);
}
}

[minona]

请问搂主找到解决方法了吗？我也碰到了类似问题，正焦急呢。

[minona]

请问有人知道解决办法吗？救急啊！

[真如实观]

直接使用SDK！用DSPack很麻烦，同时也影响性能。如以下代码可以播放AVI文件：
IGraphBuilder *pGraph = NULL;
IMediaControl *pControl=NULL;
HRESULT hr=CoCreateInstance(CLSID_FilterGraph,NULL,
CLSCTX_INPROC_SERVER,IID_IGraphBuilder,(void**)&pGraph);
if(SUCCEEDED(hr))
{
hr=pGraph->RenderFile(L"c:\\clock.avi",NULL);
}
if(SUCCEEDED(hr))
{
hr=pGraph->QueryInterface(IID_IMediaControl,(void**)&pControl);
hr=pControl->Run();
}
//注意在构造函数中加：CoInitialize(NULL);
//在折构函数中加：CoUninitialize();
//加头文件：#include <dshow.h>
//简单吧？