標題 Delphi 控制攝像頭???? 選擇自 koy0755 的 Blog 關鍵字 ? Delphi 控制攝像頭 出處 ?

你的電腦有沒有攝像頭？看到別人用QQ玩視屏你會不會去想怎么實現的？ 這里介紹使用DELPHI使用MS的AVICAP32.DLL就可輕松的實現對攝像頭編程， 如果再加上你的網絡編程水平，實現一個視屏聊天就不成什么問題了。 看看下面代碼的代碼： 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‘; 上面的代碼就是我們主要用到的一個函數和常量的定義。 好了，打開你的Delphi，新建一個工程，將上面的定義加上吧。 新建一個窗口，放個Panel上去，添加一個按鈕，Caption設置為"開始" 這里需要定義一個全局變量，var hWndC : THandle; 開始按鈕代碼如下： 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; 按F9運行一下，怎么樣，是不是可以看到攝像頭的視屏了？ 那怎么停下來？再加個按鈕caption設置成"停止" 代碼如下： if hWndC <> 0 then begin SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0); hWndC := 0; end; 視屏截到了，怎么把它給保存下來呢？ 下面按兩種方式保存，一個是BMP靜態圖，一個是AVI動畫。 再放三個按鈕到窗體上去，caption分別設置成"保存BMP"、"開始錄像"、"停止錄像" 三個按鈕的代碼分別如下： //保存BMP if hWndC <> 0 then begin SendMessage(hWndC,WM_CAP_SAVEDIB,0,longint(pchar(‘c:\\test.bmp‘))); end; //開始錄像 if hWndC <> 0 then begin SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,0, Longint(pchar(‘c:\\test.avi‘))); SendMessage(hWndC, WM_CAP_SEQUENCE, 0, 0); end; //停止錄像 if hWndC <> 0 then begin SendMessage(hWndC, WM_CAP_STOP, 0, 0); end; 再運行看看吧。。可以保存幾張圖看看，也可以錄成AVI以后慢慢欣賞。 程序運行效果： [ 相關貼圖 ] http://yousoft.hi.com.cn/upload/forum/2004715161959.jpg 完整的程序代碼如下： unit Unit1; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls; type TForm1 = class(TForm) Panel1: TPanel; Button1: TButton; Button2: TButton; Button3: TButton; Button4: TButton; Button5: TButton; procedure Button1Click(Sender: TObject); procedure Button2Click(Sender: TObject); procedure Button3Click(Sender: TObject); procedure Button4Click(Sender: TObject); procedure Button5Click(Sender: TObject); procedure FormClose(Sender: TObject; var Action: TCloseAction); private hWndC : THandle; public { Public declarations } end; var Form1: TForm1; 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(‘c:\\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(‘c:\\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; end. 如果電腦沒有攝像頭，但又想看看程序的效果，可以么？ 呵呵，當然可以，找個虛擬攝像頭不就搞定，大家可以試試SoftCam這個軟件，它是一個名副其實的軟件攝像機， 能模擬成為“真實的”攝像機，提醒一下各位，大家可不要用這個東東用在QQ，MSN等聊天軟件上欺騙MM或GG啊。 關于攝像頭編程，大家也可以看看這組VCL組件：DSPack，DSPack是一套使用微軟Direct Show和DirectX技術的類和組件，設計工作于DirectX 9，支持系統Win9X, ME, 2000和Windows XP。 好了，就介紹這些了，至于視屏聊天怎么實現，就看你的了，無非是按數據壓縮傳輸給對方，顯示出來，不過話又說回來，看似簡單，實現起來還有些難度的。

轉載于:https://www.cnblogs.com/fuyingke/archive/2005/05/16/156447.html

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