[code cpp]
void __fastcall TForm1::Button5Click(TObject *Sender)
{
CoInitialize(NULL);
InitCaptureGraphBuilder(&pGraph, &pBuild);
EnumerateVideoInputDevice(&pCap);
pGraph->AddFilter(pCap,L"Capture Filter"); // 將攝影機加入 filter graph 中
IBaseFilter *pSG_Filter;
hr = CoCreateInstance(CLSID_SampleGrabber,
NULL, CLSCTX_INPROC_SERVER,
IID_IBaseFilter,
(void**)&pSG_Filter);
hr = pGraph->AddFilter(pSG_Filter, L"SampleGrab"); // 將 Sample Grabber 加入 filter graph 中
IBaseFilter *pNull;
hr = CoCreateInstance(CLSID_NullRenderer,
NULL,
CLSCTX_INPROC_SERVER,
IID_IBaseFilter,
(void**)&pNull);
hr = pGraph->AddFilter(pNull, L"NullRender"); // << --- SDK 錯誤更正
hr = pBuild->RenderStream( &PIN_CATEGORY_PREVIEW, // Connect this pin ...
&MEDIATYPE_Video, // with this media type ...
pCap, // on this filter ...
pSG_Filter, // to the Sample Grabber ...
pNull); // ... and finally to the Null Renderer.

if(FAILED(hr)){ MessageBox(NULL,"Error","Error",MB_OK); }
ISampleGrabber *pSG;
hr = pSG_Filter->QueryInterface(IID_ISampleGrabber, (void**)&pSG);
pSG->SetOneShot(FALSE); // [設定擷取屬性] 當收到一個 sample 時,是否要停止 graph
pSG->SetBufferSamples(TRUE); // [設定擷取屬性] 是否要將 sample 放到內部 buffer 中

ZeroMemory(&am_media_type, sizeof(AM_MEDIA_TYPE));
am_media_type.majortype= MEDIATYPE_Video;//視頻流
am_media_type.formattype= FORMAT_VideoInfo;
am_media_type.subtype= MEDIASUBTYPE_RGB24;//24位圖像
hr=pSG->SetMediaType(&am_media_type);//關聯介面
hr=pSG->SetBufferSamples(True);
hr=pSG->GetConnectedMediaType(&am_media_type);
HBITMAP Bitmap;
BITMAPINFOHEADER bmphdr;
BITMAPINFO BitmapInfo;
VIDEOINFOHEADER *pVideoInfoHeader = (VIDEOINFOHEADER*)am_media_type.pbFormat;
long nBufferSize = am_media_type.lSampleSize;
long *pBuffer=(long*)malloc(nBufferSize);
pSG->GetCurrentBuffer(&nBufferSize, (long*)&pBuffer);

ZeroMemory(&pVideoInfoHeader, sizeof(VIDEOINFOHEADER));
CopyMemory(&pVideoInfoHeader, am_media_type.pbFormat, sizeof(pVideoInfoHeader));
ZeroMemory(&BitmapInfo, sizeof(BITMAPINFO));
CopyMemory(&BitmapInfo, &pVideoInfoHeader->bmiHeader, sizeof(pVideoInfoHeader->bmiHeader));
Bitmap=CreateDIBSection(0,
(BITMAPINFO *)&BitmapInfo,
DIB_RGB_COLORS,
(void **)&pBuffer,
0,
0);
pSG->GetCurrentBuffer(&nBufferSize, (long*)&pBuffer);
Form1->Image1->Picture->Bitmap->Handle= Bitmap;
pSG->Release(); // 用完 interface 後,釋放記憶體
// Step 5: 建立控制器用來執行我們的 graph filter
hr = pGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
pControl->Run();
}
[/code]

有錯誤在這一行，在 CopyMemory(&BitmapInfo, &pVideoInfoHeader->bmiHeader, sizeof(pVideoInfoHeader->bmiHeader)); 不知道要怎麼解決，
我想了好久到底要怎麼樣才能將Camera的影像擷取到Buffer再取出來做處理，
麻煩幫幫忙

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[code cpp]

[/code]
用TMemoryStream *stream; 處理影像Buffer很容易, 下面程式是我之前做影像辨識時從CCD截取影像至Buffer的片斷, 或許有幫助!


static BITMAPFILEHEADER BitmapFileHead;
static BITMAPINFOHEADER BitmapHead;
static BITMAPINFO BitmapInfo;
CAPSTATUS status;
int BIHsize, byte;
Byte *ptr;
TMemoryStream *stream;
stream=new TMemoryStream;
//取得圖片資料
VideoStr=LPVIDEOHDR(lpVHdr);
//取得CAP訊息
capGetStatus(_hCapWnd,&status,sizeof(status)) ;
//取得圖片格式容量大小
BIHsize=capGetVideoFormatSize(_hCapWnd );
//取得圖片格式 代入 bitmapinfohead 內
capGetVideoFormat(_hCapWnd,&BitmapHead,BIHsize);
capGetVideoFormat(_hCapWnd,&_BitmapInfo,sizeof(BITMAPINFO));
// 設定 BITMAPINFO
//BitmapInfo.bmiHeader=BitmapHead;
// 取得圖檔總容量
//stream->Size=sizeof(BITMAPFILEHEADER) sizeof(BITMAPINFOHEADER) BitmapHead.biSizeImage;
stream->Size=sizeof(BITMAPFILEHEADER) sizeof(BITMAPINFOHEADER) _BitmapInfo.bmiHeader.biSizeImage;
// 設定 BITMAPFILEHEAD
BitmapFileHead.bfType=0x4D42; //總是 BM
BitmapFileHead.bfSize=stream->Size; //該圖檔總大小
BitmapFileHead.bfOffBits=sizeof(BITMAPFILEHEADER) sizeof(BITMAPINFOHEADER); // 偏移至imagedata大小
// 將資料存入 memorystream
stream->Position=0;
stream->WriteBuffer(&BitmapFileHead,sizeof(BITMAPFILEHEADER));
stream->WriteBuffer(&_BitmapInfo,sizeof(BITMAPINFO));
(void*)ptr=stream->Memory;
ptr = BitmapFileHead.bfOffBits; ////不要調色盤
Move(VideoStr->lpData,ptr,_BitmapInfo.bmiHeader.biSizeImage);
// 存入完成
stream->Position=0;
Bitmap->LoadFromStream(stream);
delete(stream);
capSetCallbackOnFrame(_hCapWnd,NULL); //停止callbackonframe

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