c#摄像头编程大全(源码)

using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;
 
namespace PickHead
{
/// <summary>
/// 一个控制摄像头的类
/// </summary>
public class Pick
{
private const int WM_USER = 0x400;
private const int WS_CHILD = 0x40000000;
private const int WS_VISIBLE = 0x10000000;
private const int WM_CAP_START = WM_USER;
private const int WM_CAP_STOP = WM_CAP_START + 68;
private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
private const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
private const int WM_CAP_SEQUENCE = WM_CAP_START + 62;
private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
private const int WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+ 63;
private const int WM_CAP_SET_OVERLAY =WM_CAP_START+ 51; 
private const int WM_CAP_SET_PREVIEW =WM_CAP_START+ 50; 
private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6;
private const int WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2;
private const int WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3;
private const int WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5;
private const int WM_CAP_SET_SCALE=WM_CAP_START+ 53;
private const int WM_CAP_SET_PREVIEWRATE=WM_CAP_START+ 52; 
private IntPtr hWndC;
private bool bStat = false;
 
private IntPtr mControlPtr;
private int mWidth;
private int mHeight;
private int mLeft;
private int mTop;
 
/// <summary>
/// 初始化摄像头
/// </summary>
/// <param name="handle">控件的句柄</param>
/// <param name="left">开始显示的左边距</param>
/// <param name="top">开始显示的上边距</param>
/// <param name="width">要显示的宽度</param>
/// <param name="height">要显示的长度</param>
public Pick(IntPtr handle,int left,int top,int width,int height)
{
mControlPtr = handle;
mWidth = width;
mHeight = height;
mLeft = left;
mTop = top;
}
 
[DllImport("avicap32.dll")] 
private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName,int dwStyle,int x,int y,int nWidth,int nHeight,IntPtr hWndParent,int nID);
 
[DllImport("avicap32.dll")]
private static extern int capGetVideoFormat(IntPtr hWnd,IntPtr psVideoFormat,int wSize );
[DllImport("User32.dll")] 
private static extern bool SendMessage(IntPtr hWnd,int wMsg,int wParam,long lParam);
 
/// <summary>
/// 开始显示图像
/// </summary>
public void Start()
{
if (bStat)
return;
 
bStat = true;
byte[] lpszName = new byte[100];
 
hWndC = capCreateCaptureWindowA(lpszName,WS_CHILD|WS_VISIBLE,mLeft,mTop,mWidth,mHeight,mControlPtr,0);
 
if (hWndC.ToInt32() != 0)
{
SendMessage(hWndC,WM_CAP_SET_CALLBACK_VIDEOSTREAM,0);
SendMessage(hWndC,WM_CAP_SET_CALLBACK_ERROR,WM_CAP_SET_CALLBACK_STATUSA,WM_CAP_DRIVER_CONNECT,WM_CAP_SET_SCALE,1,WM_CAP_SET_PREVIEWRATE,66,WM_CAP_SET_OVERLAY,WM_CAP_SET_PREVIEW,0);
}
 
return;


}
 
/// <summary>
/// 停止显示
/// </summary>
public void Stop()
{
SendMessage(hWndC,WM_CAP_DRIVER_DISCONNECT,0);
bStat = false;
}
 
/// <summary>
/// 抓图
/// </summary>
/// <param name="path">要保存bmp文件的路径</param>
public void GrabImage(string path)
{
 
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
SendMessage(hWndC,WM_CAP_SAVEDIB,hBmp.ToInt64());
 
}
 
/// <summary>
/// 录像
/// </summary>
/// <param name="path">要保存avi文件的路径</param>
public void Kinescope(string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
SendMessage(hWndC,WM_CAP_FILE_SET_CAPTURE_FILEA,hBmp.ToInt64());
SendMessage(hWndC,WM_CAP_SEQUENCE,0);
}
 
/// <summary>
/// 停止录像
/// </summary>
public void StopKinescope()
{
SendMessage(hWndC,WM_CAP_STOP,0);
}
 
}
}



C#捕捉视频头（源码） 

using System; 
using System.Runtime.InteropServices; 

namespace Wuyin.ShoesManager 
{ 
/// <summary> 
/// VedioCapture 的摘要说明。 
/// </summary> 
public class VedioCapture 
{ 
private int hCaptureM; 
private bool isUnLoad = false; 
public VedioCapture() 
{ 
} 
[DllImport("avicap32.dll")] 
private static extern int capCreateCaptureWindow( string strWindowName,int height,int hwdParent,int nID ); 
[DllImport("user32.dll")] 
private static extern int SendMessage( int hwnd,int lParam ); 
[DllImport("user32.dll")] 
private static extern int SendMessage( int hwnd,string lParam ); 
[DllImport("Kernel32.dll")] 
private static extern bool CloseHandle( int hObject ); 
public bool Initialize( System.Windows.Forms.Control aContainer,int intWidth,int intHeight ) 
{ 
hCaptureM = capCreateCaptureWindow( "",0x40000000 | 0x10000000,intWidth,intHeight,aContainer.Handle.ToInt32(),1 ); 
if( hCaptureM == 0 ) return false; 

int ret = SendMessage( hCaptureM,1034,0 ); 
if( ret == 0 ) 
{ 
CloseHandle(hCaptureM); 
return false; 
} 
//WM_CAP_SET_PREVIEW 
ret = SendMessage( hCaptureM,1074,0 ); 
if( ret == 0 ) 
{ 
this.UnLoad(); 
return false; 
} 
//WM_CAP_SET_SCALE 
ret = SendMessage( hCaptureM,1077,0 ); 
if( ret == 0 ) 
{ 
this.UnLoad(); 
return false; 
} 
//WM_CAP_SET_PREVIEWRATE 
ret = SendMessage( hCaptureM,1076,0 ); 
if( ret == 0 ) 
{ 
this.UnLoad(); 
return false; 
} 
return true; 
} 

public void SingleFrameBegin() 
{ 
// 
int ret = SendMessage( hCaptureM,1094,0 ); 
} 
public void SingleFrameEnd() 
{ 
// 
int ret = SendMessage( hCaptureM,1095,0 ); 
} 

public void SingleFrameMode() 
{ 
//WM_CAP_GRAB_FRAME 
int ret = SendMessage( hCaptureM,1084,0 ); 
//WM_CAP_SET_PREVIEW 
//int ret = SendMessage( hCaptureM,0 ); 
//WM_CAP_SINGLE_FRAME 
//ret = SendMessage( hCaptureM,1096,0 ); 
} 
public void PreviewMode() 
{ 
int ret = SendMessage( hCaptureM,0 ); 
} 

public void UnLoad() 
{ 
int ret = SendMessage( hCaptureM,1035,0 ); 
CloseHandle( this.hCaptureM ); 
isUnLoad = true; 
} 

public void CopyToClipBorad() 
{ 
int ret = SendMessage( hCaptureM,1054,0 ); 
} 

public void ShowFormatDialog() 
{ 
int ret = SendMessage( hCaptureM,1065,0 ); 
} 
public void SaveToDIB( string fileName ) 
{ 
int ret = SendMessage( hCaptureM,1049,fileName ); 
} 

public void ShowDisplayDialog() 
{ 
int ret = SendMessage( hCaptureM,1067,0 ); 
} 
public System.Drawing.Image getCaptureImage() 
{ 
System.Windows.Forms.IDataObject iData = System.Windows.Forms.Clipboard.GetDataObject(); 
System.Drawing.Image retImage = null; 
if( iData != null ) 
{ 
if( iData.GetDataPresent( System.Windows.Forms.DataFormats.Bitmap ) ) 
{ 
retImage = (System.Drawing.Image)iData.GetData( System.Windows.Forms.DataFormats.Bitmap ); 
} 
else if( iData.GetDataPresent( System.Windows.Forms.DataFormats.Dib ) ) 
{ 
retImage = (System.Drawing.Image)iData.GetData( System.Windows.Forms.DataFormats.Dib ); 
} 
} 
return retImage; 
} 

~VedioCapture() 
{ 
if( !isUnLoad ) 
{ 
this.UnLoad(); 
} 
} 
} 
}