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December 11th, 2022, 09:39 AM
#1
capture video from 2 webcams
can you tell me how to make a program in c++ builder 5
which captures images from 2 or 3 webcams at the same time
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December 12th, 2022, 01:58 AM
#2
Re: capture video from 2 webcams
I'd start here and do lots of reading.
https://learn.microsoft.com/en-us/wi...-video-capture
Before you start with 2 or 3 cameras, what do you know about capturing one camera?
> c++ builder 5
https://winworldpc.com/product/borland-c-builder/5x
I'd say get a compiler that wasn't 20 years old.
Chances are, it's pretty clueless about all the new features in window 7,8,10,11.
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December 12th, 2022, 03:46 AM
#3
Re: capture video from 2 webcams
LRESULT CALLBACK capErrorCallback(HWND hWnd, int nID, LPCSTR lpsz)
{ return 1;}
LRESULT PASCAL capOnFrameCallback(HWND hWnd, LPVIDEOHDR lpVHdr)
{ return OnFrame(lpVHdr);}
LRESULT CALLBACK capStatusCallback(HWND hWnd, int nID, LPCSTR lpsz)
{ return 1;}
LRESULT CALLBACK capVideoStreamCallback(HWND hWnd, LPVIDEOHDR lpVHdr)
{ return 1;}
LRESULT CALLBACK capWaveStreamCallback(HWND hWnd, LPWAVEHDR lpWHdr)
{ return 1;}
LRESULT CALLBACK capYieldCallback(HWND hWnd)
{ return 1;}
LRESULT CALLBACK capControlCallback(HWND hWnd, int nState)
{ return 1;}
bool InstallCallback(HWND h)
{
int res=1;
res&=capSetCallbackOnCapControl (h, capControlCallback);
res&=capSetCallbackOnError (h, capErrorCallback);
res&=capSetCallbackOnFrame (h, capOnFrameCallback);
res&=capSetCallbackOnStatus (h, capStatusCallback);
res&=capSetCallbackOnVideoStream(h, capVideoStreamCallback);
res&=capSetCallbackOnWaveStream (h, capWaveStreamCallback);
res&=capSetCallbackOnYield (h, capYieldCallback);
return res;
}
HWND ACaptureWindowCreate(void)
{
for (int wIndex = 0; wIndex < 10; wIndex++)
{
res=capGetDriverDescription(wIndex, szDeviceName [wIndex], 80,
szDeviceVersion[wIndex], 80);
if(res) NumberDrivers++, DriverNumber=wIndex;
}
res=1;
if(NumberDrivers==0){ShowMessage("Capture driver not found.");}
return capCreateCaptureWindow("VideoCap",WS_CHILD/*|WS_VISIBLE*/,
0,0, 10, 10, Form1->Handle, 0);
}
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December 12th, 2022, 04:42 AM
#4
Re: capture video from 2 webcams
int SetCaptureParameters(HWND VideoCap)
{
res=1;
Form1->Panel1->Caption=IntToStr(DriverNumber);
res&=capDriverConnect(VideoCap, DriverNumber);
res&=capDriverGetCaps(VideoCap, &CapDrvCaps, sizeof (CAPDRIVERCAPS));
if(CapDrvCaps.fHasOverlay)capOverlay(VideoCap, 1);
res&=capCaptureGetSetup(VideoCap, &cp, sizeof(CAPTUREPARMS));
cp.dwRequestMicroSecPerFrame=40000;
cp.fMakeUserHitOKToCapture=1;
cp.fCaptureAudio=0;
cp.fYield=1;
cp.fAbortLeftMouse=0;
cp.fAbortRightMouse=0;
res&=capCaptureSetSetup(VideoCap, &cp, sizeof(CAPTUREPARMS));
res&=InstallCallback(VideoCap);
if(res==0){ShowMessage("Video camera not connected to the PC."); return 0; }
else {DevEnabled=1; return 1; }
}
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