请教如何将摄像头的图象能在程序的屏幕上显示呢？

Question

请教如何将摄像头的图象能在程序的屏幕上显示呢？ (delphi)急急

Answer 1

const WM_CAP_START = WM_USER;
const WM_CAP_STOP = WM_CAP_START + 68;
const WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
const WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
const WM_CAP_SAVEDIB = WM_CAP_START + 25;
const WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
const WM_CAP_SEQUENCE = WM_CAP_START + 62;
const WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
const WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+  63 ;
const WM_CAP_SET_OVERLAY =WM_CAP_START+  51 ;
const WM_CAP_SET_PREVIEW =WM_CAP_START+  50 ;
const WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6;
const WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2;
const WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3;
const WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5;
const WM_CAP_SET_SCALE=WM_CAP_START+  53 ;
const WM_CAP_SET_PREVIEWRATE=WM_CAP_START+  52 ;function capCreateCaptureWindowA(lpszWindowName : PCHAR;
      dwStyle : longint;x : integer;y : integer;nWidth : integer;
      nHeight : integer;ParentWin : HWND;nId : integer): HWND;
STDCALL EXTERNAL 'AVICAP32.DLL';
implementation
{$R *.dfm}procedure TForm1.Button1Click(Sender: TObject);
begin
  hWndC := capCreateCaptureWindowA('My Own Capture Window',WS_CHILD or WS_VISIBLE ,Panel1.Left,Panel1.Top,Panel1.Width,Panel1.Height,Form1.Handle,0);  hWndC := capCreateCaptureWindowA('My Own Capture Window',WS_CHILD or WS_VISIBLE ,Panel1.Left,Panel1.Top,Panel1.Width,Panel1.Height,Form1.Handle,0);
   if hWndC <> 0 then  
   begin
      SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
      SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);
      SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);
      SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);
      SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);
      SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);
      SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);
      SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);
  end;end;procedure TForm1.Button2Click(Sender: TObject);
begin
  if hWndC <> 0 then begin
    SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
    hWndC := 0;
   end;
end;procedure TForm1.Button3Click(Sender: TObject);
begin
  if hWndC <> 0 then begin
       SendMessage(hWndC,WM_CAP_SAVEDIB,0,longint(pchar('e:\test.bmp')));
       image1.Picture.LoadFromFile('e:\test.bmp');
       end;
end;procedure TForm1.Button4Click(Sender: TObject);
begin
  if hWndC <> 0 then
  begin
    SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,0, Longint(pchar('e:\test.avi')));
    SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0);
  end;
end;procedure TForm1.Button5Click(Sender: TObject);
begin
  if hWndC <> 0 then begin
     SendMessage(hWndC, WM_CAP_STOP, 0, 0);
  end;
end;procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  if hWndC <> 0 then begin
    SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
  end;
end;

Answer 2

原来做过Axis和另一种型号的，如果能把摄像头放在局域网内通过web访问的话，就简单，它里面有自带的ocx插件，下载到本地，通过delphi注册就可以当控件用，研究一下它的属性就可以。
相信用过Axis的就能明白我说的。