多个网络摄像头捕捉在一个AVI与C＃（Windows窗体）
我需要找到一种方法如何从C＃（Windows应用程序）中的2个或更多摄像头制作一个视频文件。 我试图用谷歌找到一些样本，但没有成功。 我找到了一个如何从网络摄像头录制视频的方法（使用directshowNet，directx我可以用两个网络摄像头存储两个AVI ...）
更多关于directShowNet的信息：
http：//directshownet.sourceforge.net/
捕捉视频示例：
http：//www.codeproject.com/KB/directx/directshownet.aspx
举个简单的例子，我有2个摄像头。 我需要在记录过程中获取帧，将一帧贴到另一帧附近（制作一张图像，从两帧中创建一帧），然后将这些新帧插入到新AVI中。 任何想法？ 是否有可能及时获得帧，并从2次捕获中创建一个新的AVI？
问题有点旧（！），但以防万一：我成功地使用了AForge.NET库。 在其2.1.4版本中，它有一个显示两台摄像机视频的示例。
你所要做的就是不使用默认的视频播放器控件使用VideoCaptureDevice，而是在NewFrame事件中创建你想要的位图。 AForge.NET甚至有一个AVIWriter，您可以使用它来创建输出视频。
这里这个代码合并2张图片
#region TakeSnap Class
IntPtr memDc;
[StructLayout(LayoutKind.Sequential)]
public struct Sizes
{
public Int32 cx;
public Int32 cy;
public Sizes(Int32 x, Int32 y)
{
cx = x;
cy = y;
}
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct BLENDFUNCTION
{
public byte BlendOp;
public byte BlendFlags;
public byte SourceConstantAlpha;
public byte AlphaFormat;
}
[StructLayout(LayoutKind.Sequential)]
public struct Points
{
public Int32 x;
public Int32 y;
public Points(Int32 x, Int32 y)
{
this.x = x;
this.y = y;
}
}
[DllImport("gdi32.dll",EntryPoint="DeleteDC")]
public static extern IntPtr DeleteDC(IntPtr hDc);
[DllImport("gdi32.dll",EntryPoint="DeleteObject")]
public static extern IntPtr DeleteObject(IntPtr hDc);
[DllImport("gdi32.dll",EntryPoint="BitBlt")]
public static extern bool BitBlt(IntPtr hdcDest,int xDest,
int yDest,int wDest,int hDest,IntPtr hdcSource,
int xSrc,int ySrc,int RasterOp);
[DllImport ("gdi32.dll",EntryPoint="CreateCompatibleBitmap")]
public static extern IntPtr CreateCompatibleBitmap(IntPtr hdc,
int nWidth, int nHeight);
[DllImport ("gdi32.dll",EntryPoint="CreateCompatibleDC")]
public static extern IntPtr CreateCompatibleDC(IntPtr hdc);
[DllImport ("gdi32.dll",EntryPoint="SelectObject")]
public static extern IntPtr SelectObject(IntPtr hdc,IntPtr bmp);
[DllImport("user32.dll", EntryPoint="GetDesktopWindow")]
public static extern IntPtr GetDesktopWindow();
[DllImport("user32.dll",EntryPoint="GetDC")]
public static extern IntPtr GetDC(IntPtr ptr);
[DllImport("user32.dll",EntryPoint="GetSystemMetrics")]
public static extern int GetSystemMetrics(int abc);
[DllImport("user32.dll",EntryPoint="GetWindowDC")]
public static extern IntPtr GetWindowDC(Int32 ptr);
[DllImport("user32.dll",EntryPoint="ReleaseDC")]
public static extern IntPtr ReleaseDC(IntPtr hWnd,IntPtr hDc);
protected static IntPtr m_HBitmap;
public const int SM_CXSCREEN=0;
public const int SM_CYSCREEN=1;
public const int SRCCOPY = 13369376;
#endregion
private IntPtr get_pointer(string path)
{
Bitmap bitmap=new Bitmap(path);
IntPtr oldBits = IntPtr.Zero;
IntPtr screenDC = GetDC(IntPtr.Zero);
IntPtr hBitmap = IntPtr.Zero;
memDc = CreateCompatibleDC(screenDC);
try
{
Point topLoc = new Point(Left, Top);
Sizes bitMapSize = new Sizes(bitmap.Width, bitmap.Height);
BLENDFUNCTION blendFunc = new BLENDFUNCTION();
Points srcLoc = new Points(0, 0);
hBitmap = bitmap.GetHbitmap(Color.FromArgb(0));
IntPtr pt= SelectObject(memDc, hBitmap);
ReleaseDC(IntPtr.Zero, screenDC);
return memDc;
}
catch(Exception ex)
{
return this.Handle;
}
}
public Bitmap GetDesktopImage()
{
try
{
Sizes size;
IntPtr hBitmap;
IntPtr hDC = get_pointer(@"C:Documents and SettingsadminDesktop11_13_40_453.jpg");
IntPtr hMemDC = CreateCompatibleDC(hDC);
IntPtr hDC1 = get_pointer(@"C:Documents and SettingsadminDesktop11_13_42_906.jpg");
size.cx = this.Width-2;
size.cy = this.Height-22;
hBitmap = CreateCompatibleBitmap(hDC, size.cx*2, size.cy);
if (hBitmap!=IntPtr.Zero)
{
IntPtr hOld = (IntPtr)SelectObject(hMemDC, hBitmap);
BitBlt(hMemDC, 0, 0,size.cx,size.cy, hDC,0, 0,SRCCOPY);
BitBlt(hMemDC, size.cx, 0,size.cx,size.cy, hDC1,0, 0,SRCCOPY);
SelectObject(hMemDC, hOld);
DeleteDC(hMemDC);
DeleteDC(memDc);
ReleaseDC(this.Handle, hDC);
ReleaseDC(this.Handle, hDC1);
Bitmap bmp = System.Drawing.Image.FromHbitmap(hBitmap);
DeleteObject(hBitmap);
GC.Collect();
return bmp;
}
return null;
}
catch(Exception ex)
{
return null;
}
}
private void Createimage()
{
try
{
Bitmap bm= GetDesktopImage();
bm.Save(Application.StartupPath+"temp"+DateTime.Now.ToString("hh-mm-ss ff")+".Jpeg",System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}
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