C#捕捉视频头（源码）-

using System;


using System.Runtime.InteropServices;




namespace Wuyin.ShoesManager




...{




/**////


/// VedioCapture 的摘要说明。


///


public class VedioCapture




...{


private int hCaptureM;


private bool isUnLoad = false;


public VedioCapture()




...{


}


[DllImport("avicap32.dll")]


private static extern int capCreateCaptureWindow( string strWindowName, int dwStyle, int x, int y ,int width, int height , int hwdParent, int nID );


[DllImport("user32.dll")]


private static extern int SendMessage( int hwnd , int wMsg, int wParam , int lParam );


[DllImport("user32.dll")]


private static extern int SendMessage( int hwnd , int wMsg, int wParam , 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, 0,0,intWidth,intHeight,aContainer.Handle.ToInt32() ,1 );


if( hCaptureM == 0 ) return false;




int ret = SendMessage( hCaptureM , 1034, 0,0 );


if( ret == 0 )




...{


CloseHandle(hCaptureM);


return false;


}


//WM_CAP_SET_PREVIEW


ret = SendMessage( hCaptureM, 1074, 1, 0 );


if( ret == 0 )




...{


this.UnLoad();


return false;


}


//WM_CAP_SET_SCALE


ret = SendMessage( hCaptureM, 1077, 1, 0 );


if( ret == 0 )




...{


this.UnLoad();


return false;


}


//WM_CAP_SET_PREVIEWRATE


ret = SendMessage( hCaptureM, 1076, 66, 0 );


if( ret == 0 )




...{


this.UnLoad();


return false;


}


return true;


}




public void SingleFrameBegin()




...{


//


int ret = SendMessage( hCaptureM, 1094 , 0, 0 );


}


public void SingleFrameEnd()




...{


//


int ret = SendMessage( hCaptureM, 1095 , 0, 0 );


}




public void SingleFrameMode()




...{


//WM_CAP_GRAB_FRAME


int ret = SendMessage( hCaptureM, 1084 , 0, 0 );


//WM_CAP_SET_PREVIEW


//int ret = SendMessage( hCaptureM, 1074 , 0, 0 );


//WM_CAP_SINGLE_FRAME


//ret = SendMessage( hCaptureM, 1096 , 0, 0 );


}


public void PreviewMode()




...{


int ret = SendMessage( hCaptureM, 1074 , 1, 0 );


}




public void UnLoad()




...{


int ret = SendMessage( hCaptureM, 1035, 0, 0 );


CloseHandle( this.hCaptureM );


isUnLoad = true;


}




public void CopyToClipBorad()




...{


int ret = SendMessage( hCaptureM, 1054, 0, 0 );


}




public void ShowFormatDialog()




...{


int ret = SendMessage( hCaptureM, 1065, 0, 0 );


}


public void SaveToDIB( string fileName )




...{


int ret = SendMessage( hCaptureM, 1049, 0, fileName );


}




public void ShowDisplayDialog()




...{


int ret = SendMessage( hCaptureM, 1067, 0, 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();


}


}


}


}