avicap32.dll是Windows API应用程序接口相关模块,用于对摄像头和其它视频硬件进行AⅥ电影和视频的截取。
C#详细控制视频参数:
1、首先定义一个底层类AviCapture.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.InteropServices;
using System.Drawing;
namespace CamaraMonitor
{
public class AviCapture
{
[DllImport("avicap32.dll")]//包含了执行视频捕获的函数,它给AVI文件I/O和视频、音频设备驱动程序提供一个高级接口
public static extern IntPtr capCreateCaptureWindow(string lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hwndParent, int nID);
[DllImport("AVICAP32.dll", CharSet = CharSet.Unicode)]
public static extern bool capGetDriverDescription(int wDriverIndex, StringBuilder lpszName, int cbName, StringBuilder lpszVer, int cbVer);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, FrameEventHandler lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref BITMAPINFO lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPDRIVERCAPS lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPTUREPARMS lParam);
[DllImport("User32.dll")]
public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPSTATUS lParam);
[DllImport("User32.dll")]
public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags);
[DllImport("avicap32.dll")]
public static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize);
#region 消息常量(向窗口发送消息的指令)
//消息常量 --------------------------------------------
public const int WM_START = 0x400; //此并非摄像头消息0x400表示的就是1024
public const int WS_CHILD = 0x40000000;
public const int WS_VISIBLE = 0x10000000;
public const int SWP_NOMOVE = 0x2;
public const int SWP_NOZORDER = 0x4;
public const int WM_CAP_GET_CAPSTREAMPTR = WM_START + 1;
public const int WM_CAP_SET_CALLBACK_ERROR = WM_START + 2;//设置收回错误
public const int WM_CAP_SET_CALLBACK_STATUS = WM_START + 3;//设置收回状态
public const int WM_CAP_SET_CALLBACK_YIELD = WM_START + 4;//设置收回出产
public const int WM_CAP_SET_CALLBACK_FRAME = WM_START + 5;//设置收回结构
public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_START + 6;//设置收回视频流
public const int WM_CAP_SET_CALLBACK_WAVESTREAM = WM_START + 7;//设置收回视频波流
public const int WM_CAP_GET_USER_DATA = WM_START + 8;//获得使用者数据
public const int WM_CAP_SET_USER_DATA = WM_START + 9;//设置使用者数据
public const int WM_CAP_DRIVER_CONNECT = WM_START + 10;//驱动程序连接
public const int WM_CAP_DRIVER_DISCONNECT = WM_START + 11;//断开启动程序连接
public const int WM_CAP_DRIVER_GET_NAME = WM_START + 12;//获得驱动程序名字
public const int WM_CAP_DRIVER_GET_VERSION = WM_START + 13;//获得驱动程序版本
public const int WM_CAP_DRIVER_GET_CAPS = WM_START + 14;//获得驱动程序帽子
public const int WM_CAP_FILE_SET_CAPTURE_FILE = WM_START + 20;//设置捕获文件
public const int WM_CAP_FILE_GET_CAPTURE_FILE = WM_START + 21;//获得捕获文件
public const int WM_CAP_FILE_ALLOCATE = WM_START + 22;//分派文件
public const int WM_CAP_FILE_SAVEAS = WM_START + 23;//另存文件为
public const int WM_CAP_FILE_SET_INFOCHUNK = WM_START + 24;//设置开始文件
public const int WM_CAP_FILE_SAVEDIB = WM_START + 25;//保存文件
public const int WM_CAP_EDIT_COPY = WM_START + 30;//编辑复制
public const int WM_CAP_SET_AUDIOFORMAT = WM_START + 35;//设置音频格式
public const int WM_CAP_GET_AUDIOFORMAT = WM_START + 36;//捕获音频格式
public const int WM_CAP_DLG_VIDEOFORMAT = WM_START + 41;//1065 打开视频格式设置对话框
public const int WM_CAP_DLG_VIDEOSOURCE = WM_START + 42;//1066 打开属性设置对话框,设置对比度亮度等
public const int WM_CAP_DLG_VIDEODISPLAY = WM_START + 43;//1067 打开视频显示
public const int WM_CAP_GET_VIDEOFORMAT = WM_START + 44;//1068 获得视频格式
public const int WM_CAP_SET_VIDEOFORMAT = WM_START + 45;//1069 设置视频格式
public const int WM_CAP_DLG_VIDEOCOMPRESSION = WM_START + 46;//1070 打开压缩设置对话框
public const int WM_CAP_SET_PREVIEW = WM_START + 50;//设置预览
public const int WM_CAP_SET_OVERLAY = WM_START + 51;//设置覆盖
public const int WM_CAP_SET_PREVIEWRATE = WM_START + 52;//设置预览比例
public const int WM_CAP_SET_SCALE = WM_START + 53;//设置刻度
public const int WM_CAP_GET_STATUS = WM_START + 54;//获得状态
public const int WM_CAP_SET_SCROLL = WM_START + 55;//设置卷
public const int WM_CAP_GRAB_FRAME = WM_START + 60;//逮捕结构
public const int WM_CAP_GRAB_FRAME_NOSTOP = WM_START + 61;//停止逮捕结构
public const int WM_CAP_SEQUENCE = WM_START + 62;//次序
public const int WM_CAP_SEQUENCE_NOFILE = WM_START + 63;//使用WM_CAP_SEUENCE_NOFILE消息(capCaptureSequenceNoFile宏),可以不向磁盘文件写入数据。该消息仅在配合回调函数时有用,它允许你的应用程序直接使用音视频数据。
public const int WM_CAP_SET_SEQUENCE_SETUP = WM_START + 64;//设置安装次序
public const int WM_CAP_GET_SEQUENCE_SETUP = WM_START + 65;//获得安装次序
public const int WM_CAP_SET_MCI_DEVICE = WM_START + 66;//设置媒体控制接口
public const int WM_CAP_GET_MCI_DEVICE = WM_START + 67;//获得媒体控制接口
public const int WM_CAP_STOP = WM_START + 68;//停止
public const int WM_CAP_ABORT = WM_START + 69;//异常中断
public const int WM_CAP_SINGLE_FRAME_OPEN = WM_START + 70;//打开单一的结构
public const int WM_CAP_SINGLE_FRAME_CLOSE = WM_START + 71;//关闭单一的结构
public const int WM_CAP_SINGLE_FRAME = WM_START + 72;//单一的结构
public const int WM_CAP_PAL_OPEN = WM_START + 80;//打开视频
public const int WM_CAP_PAL_SAVE = WM_START + 81;//保存视频
public const int WM_CAP_PAL_PASTE = WM_START + 82;//粘贴视频
public const int WM_CAP_PAL_AUTOCREATE = WM_START + 83; //自动创造
public const int WM_CAP_PAL_MANUALCREATE = WM_START + 84;//手动创造
public const int WM_CAP_SET_CALLBACK_CAPCONTROL = WM_START + 85;// 设置收回的错误
#endregion 消息常量
#region 结构 VIDEOHDR|BITMAPINFOHEADER|BITMAPINFO|CAPTUREPARMS|CAPDRIVERCAPS|CAPSTATUS
//========================================================VideoHdr 结构=====================================================================
//VideoHdr 结构 定义了视频数据块的头信息,在编写回调函数时常用到其数据成员lpData(指向数据缓存的指针)和dwBufferLength(数据缓存的大小)。
//视频帧到缓存的捕获则需要应用回调函数和相应的数据块结构 VIDEOHDR
[StructLayout(LayoutKind.Sequential)]
public struct VIDEOHDR
{
public IntPtr lpData; /* 指向数据缓存的指针 */
public int dwBufferLength; /* 数据缓存的大小 */
public int dwBytesUsed; /* Bytes actually used */
public int dwTimeCaptured; /* Milliseconds from start of stream */
public int dwUser; /* for client's use */
public int dwFlags; /* assorted flags (see defines) */
public int dwReserved; /* reserved for driver */
}
//=========================================================================================================================================
//=======================================================BitmapInfoHeader结构===================================================================
//BitmapInfoHeader定义了位图的头部信息
[StructLayout(LayoutKind.Sequential)]
public struct BITMAPINFOHEADER
{
public int biSize;
public int biWidth;
public int biHeight;
public short biPlanes;
public short biBitCount;
public int biCompression;
public int biSizeImage;
public int biXPelsPerMeter;
public int biYPelsPerMeter;
public int biClrUsed;
public int biClrImportant;
}
//=========================================================================================================================================
//======================================================BitmapInfo结构=====================================================================
//BitmapInfo 位图信息
[StructLayout(LayoutKind.Sequential)]
public struct BITMAPINFO
{
public BITMAPINFOHEADER bmiHeader;
public int bmiColors;
}
//=========================================================================================================================================
//=====================================================CAPTUREPARMS结构======================================================================
//CAPTUREPARMS 包含控制视频流捕获过程的参数,如捕获帧频、指定键盘或鼠标键以终止捕获、捕获时间限制等;
[StructLayout(LayoutKind.Sequential)]
public struct CAPTUREPARMS
{
public int dwRequestMicroSecPerFrame; // 期望的桢播放率,以毫秒为单位,默认为66667,相当于15桢每秒。
public bool fMakeUserHitOKToCapture; // Show "Hit OK to cap" dlg?开始捕获标志位,如果值为真,则在开始捕获前要产生一个询问对话框,默认为假。
public uint wPercentDropForError; //所允许的最大丢桢百分比,可以从0变化到100,默认值为10。
public bool fYield; /*另起线程标志位,如果为真,则程序重新启动一个线程用于视频流的捕获,默认值是假。
但是如果你是为了真,你必须要在程序中处理一些潜在的操作,因为当视频捕获时,其他操作并没有被屏蔽。*/
public int dwIndexSize; // 在AVI文件中所允许的最大数目的索引项(32K)
public uint wChunkGranularity; // AVI文件的逻辑尺寸,以字节为单位。如果值是0,则说明该尺寸渐增 在 Win32程序中无用。(2K)
public bool fUsingDOSMemory; // Use DOS buffers?
public uint wNumVideoRequested; // 所被允许分配的最大视频缓存
public bool fCaptureAudio; // 音频标志位,如果音频流正在捕获,则该值为真。
public uint wNumAudioRequested; // 最大数量的音频缓存,默认值为10。
public uint vKeyAbort; // 终止流捕获的虚拟键盘码,默认值为VK_ESCAPE
[MarshalAs(UnmanagedType.Bool)]
public bool fAbortLeftMouse; // 终止鼠标左键标志位,如果该值为真,则在流捕获过程中如果点击鼠标左键则该捕获终止,默认值为真。
public bool fAbortRightMouse; // Abort on right mouse?
public bool fLimitEnabled; // 捕获操作时间限制,如果为真,则时间到了以后捕获操作终止,默认为假
public uint wTimeLimit; // 具体终止时间,只有 fLimitEnabled是真时.该位才有效
public bool fMCIControl; // Use MCI video source?
public bool fStepMCIDevice; // Step MCI device?MCI 设备标志。
public int dwMCIStartTime; // Time to start in MS
public int dwMCIStopTime; // Time to stop in MS
public bool fStepCaptureAt2x; // Perform spatial averaging 2x
public int wStepCaptureAverageFrames; // 当基于平均采样来创建桢时,桢的采样时间,典型值是5
public int dwAudioBufferSize; // 音频缓存的尺寸,如果用默认值0,缓存尺寸是最大0.5秒,或10k字节。
public int fDisableWriteCache; // Attempt to disable write cache
public int AVStreamMaster; //音视频同步标志。
}
//=========================================================================================================================================
//=================================================CAPDRIVERCAPS结构=======================================================================
//CAPDRIVERCAPS定义了捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
[StructLayout(LayoutKind.Sequential)]
public struct CAPDRIVERCAPS
{
[MarshalAs(UnmanagedType.U2)]
public UInt16 wDeviceIndex; //捕获驱动器的索引值,该值可以由0到9变化。
[MarshalAs(UnmanagedType.Bool)]
public bool fHasOverlay; // 视频叠加标志,如果设备支持视频叠加这该位是真。
[MarshalAs(UnmanagedType.Bool)]
public bool fHasDlgVideoSource; //视频资源对话框标志位,如果设备支持视频选择、控制对话框,该值为真。
[MarshalAs(UnmanagedType.Bool)]
public bool fHasDlgVideoFormat; //视频格式对话框标志位,如果设备支持对视频格式对话框的选择,该位真。
[MarshalAs(UnmanagedType.Bool)]
public bool fHasDlgVideoDisplay; //视频展示对话框标志位,如果设备支持对视频捕获缓存区的重新播放,该位是真。
[MarshalAs(UnmanagedType.Bool)]
public bool fCaptureInitialized; //捕获安装标志位,如果捕获驱动器已经成功连接,该值为真。
//[MarshalAs(UnmanagedType.Bool)]
public bool fDriverSuppliesPalettes; //驱动器调色板标志位,如果驱动器能创建调色板,则该位是真。
[MarshalAs(UnmanagedType.I4)]
public int hVideoIn;
[MarshalAs(UnmanagedType.I4)]
public int hVideoOut;
[MarshalAs(UnmanagedType.I4)]
public int hVideoExtIn;
[MarshalAs(UnmanagedType.I4)]
public int hVideoExtOut;
}
//=========================================================================================================================================
//=====================================================CAPSTATUS结构========================================================================
//CAPSTATUS定义了捕获窗口的当前状态,如图像的宽、高等;
[StructLayout(LayoutKind.Sequential)]
public struct CAPSTATUS
{
public int uiImageWidth; //图像宽度
public int uiImageHeight; //图像高度
public bool fLiveWindow; //活动窗口标记,如果窗口正以预览的方式展示图像,那么该值为真
public bool fOverlayWindow; //叠加窗口标志位,如果正在使用硬件叠加,则该位是真。
public bool fScale; //输入所放标志位,如果窗口是正在缩放视频到客户区,那么该位是真。当使用硬件叠加时,改位无效。
public Point ptScroll; //被展示在窗口客户区左上角的那个象素的x、y坐标偏移量。
public bool fUsingDefaultPalette; //默认调色板标志位,如果捕获窗口正在使用当前默认调色板,该值为真
public bool fAudioHardware; // 音频硬件标志位,如果系统已经安装了音频硬件,该值为真。
public bool fCapFileExists; //捕获文件标志位,如果一个捕获文件已经被创建,该值为真
public int dwCurrentVideoFrame; // 当前或最近流捕获过程中,所处理的桢的数目。包括丢弃的桢。
public int dwCurrentVideoFramesDropped;//当前流捕获过程中丢弃的桢的数目。
public int dwCurrentWaveSamples; // # of wave samples cap'td
public int dwCurrentTimeElapsedMS; // 从当前流捕获开始计算,程序所用的时间,以毫秒为单位。
public IntPtr hPalCurrent; // 当前剪切板的句柄。
public bool fCapturingNow; // 捕获标志位,当捕获是正在进行时,改位是真
public int dwReturn; // 错误返回值,当你的应用程序不支持错误回调函数时可以应用改位
public int wNumVideoAllocated; // 被分配的视频缓存的数目。
public int wNumAudioAllocated; // 被分配的音频缓存的数目。
}
//=========================================================================================================================================
#endregion 结构 VIDEOHDR|BITMAPINFOHEADER|BITMAPINFO|CAPTUREPARMS|CAPDRIVERCAPS|CAPSTATUS
public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr);
#region 公共函数
//公共函数
public static object GetStructure(IntPtr ptr, ValueType structure)
{
return Marshal.PtrToStructure(ptr, structure.GetType());
}
public static object GetStructure(int ptr, ValueType structure)
{
return GetStructure(new IntPtr(ptr), structure);
}
public static void Copy(IntPtr ptr, byte[] data)
{
Marshal.Copy(ptr, data, 0, data.Length);
}
public static void Copy(int ptr, byte[] data)
{
Copy(new IntPtr(ptr), data);
}
public static int SizeOf(object structure)
{
return Marshal.SizeOf(structure);
}
#endregion 公共函数
}
}
2、然后在AviCapture类基础上建立的Video类Video.cs
using System;
using System.Collections;
using System.Drawing;
using System.Runtime.InteropServices;
using System.Text;
using System.IO;
namespace CamaraMonitor
{
public class Video
{
public bool flag = true;
public delegate void RecievedFrameEventHandler(byte[] data);
public event RecievedFrameEventHandler RecievedFrame;
public static ArrayList allDriver = new ArrayList();//所有视频硬件信息
public AviCapture.CAPDRIVERCAPS CapDriverCAPS;//捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
public AviCapture.CAPSTATUS CapStatus;//该结构用于保存视频设备捕获窗口的当前状态,如图像的宽、高等
public AviCapture.CAPTUREPARMS Capparms;
private IntPtr mControlPtr;//显示设备句柄
public IntPtr lwndC;
private int mWidth;//视频宽度
private int mHeight;//视频高度
public Bitmap ba;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="handle"></param>
/// <param name="width"></param>
/// <param name="height"></param>
public Video(IntPtr handle, int width, int height)
{
CapDriverCAPS = new AviCapture.CAPDRIVERCAPS();//捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
CapStatus = new AviCapture.CAPSTATUS();//该结构用于保存视频设备捕获窗口的当前状态,如图像的宽、高等
mControlPtr = handle;
mWidth = width;
mHeight = height;
//---------------------------------------------------以下为获得机器上所有视频设备
}
/// <summary>
/// 方法说明:获得本机器上的所有视频设备
/// </summary>
//public static void GetAllDriver()
//{
// for (int i = 0; i < 6; i++)
// {
// StringBuilder name = new StringBuilder(128);
// StringBuilder version = new StringBuilder(128);
// if (AviCapture.capGetDriverDescription(i, name, 128, version, 128))//获得已经安装的 捕获的设备 名称和版本信息
// {
// AviCapture.VideoCaptureDevice vcd = new VideoCaptureDevice(i, name.ToString(), version.ToString());
// allDriver.Add(vcd);
// }
// }
//}
public void get()
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_GET_SEQUENCE_SETUP, AviCapture.SizeOf(Capparms), ref Capparms);
}
public void set()
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_SEQUENCE_SETUP, AviCapture.SizeOf(Capparms), ref Capparms);
}
/// <summary>
/// 关闭摄像头
/// </summary>
public void CloseWebcam(int index) //关闭摄像头
{
CapDriverCAPS.fCaptureInitialized = false;
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_DRIVER_DISCONNECT, index, 0);
}
/// <summary>
/// 开启摄像头
/// </summary>
public void StartWebCam() //开启摄像头
{
this.lwndC = AviCapture.capCreateCaptureWindow("", AviCapture.WS_CHILD | AviCapture.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);//AVICap类的捕捉窗口
//AviCapture.FrameEventHandler FrameEventHandler = new AviCapture.FrameEventHandler(framecallback);
//AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_CALLBACK_ERROR, 0, 0);//注册错误回调函数
//AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_CALLBACK_STATUS, 0, 0);//注册状态回调函数
//AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);//注册视频流回调函数
//AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_CALLBACK_FRAME, 0, FrameEventHandler);//注册帧回调函数
//if (!CapDriverCAPS.fCaptureInitialized)//判断当前设备是否被其他设备连接已经连接
//{
if (AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_DRIVER_CONNECT, 0, 0))
{
//-----------------------------------------------------------------------
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_DRIVER_GET_CAPS, AviCapture.SizeOf(CapDriverCAPS), ref CapDriverCAPS);//获得当前视频 CAPDRIVERCAPS定义了捕获驱动器的能力,如有无视频叠加能力、有无控制视频源、视频格式的对话框等;
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_GET_STATUS, AviCapture.SizeOf(CapStatus), ref CapStatus);//获得当前视频流的尺寸 存入CapStatus结构
AviCapture.BITMAPINFO bitmapInfo = new AviCapture.BITMAPINFO();//设置视频格式 (height and width in pixels, bits per frame).
bitmapInfo.bmiHeader = new AviCapture.BITMAPINFOHEADER();
bitmapInfo.bmiHeader.biSize = AviCapture.SizeOf(bitmapInfo.bmiHeader);
bitmapInfo.bmiHeader.biWidth = mWidth;
bitmapInfo.bmiHeader.biHeight = mHeight;
bitmapInfo.bmiHeader.biPlanes = 1;
bitmapInfo.bmiHeader.biBitCount = 24;
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_PREVIEWRATE, 34, 0);//设置在PREVIEW模式下设定视频窗口的刷新率 设置每34毫秒显示一帧,即显示帧速为每秒29帧
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_SCALE, 1, 0);//打开预览视频的缩放比例
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_VIDEOFORMAT, AviCapture.SizeOf(bitmapInfo), ref bitmapInfo);
AviCapture.CAPTUREPARMS captureparms = new AviCapture.CAPTUREPARMS();
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_GET_SEQUENCE_SETUP, AviCapture.SizeOf(captureparms), ref captureparms);
if (CapDriverCAPS.fHasOverlay)
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_OVERLAY, 1, 0);//启用叠加 注:据说启用此项可以加快渲染速度
}
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SET_PREVIEW, 1, 0);//设置显示图像启动预览模式 PREVIEW
AviCapture.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, AviCapture.SWP_NOZORDER | AviCapture.SWP_NOMOVE);//使捕获窗口与进来的视频流尺寸保持一致
}
else
{
System.Windows.Forms.MessageBox.Show("未能连接设备,请检查设备连接及是否有其他程序占用!");
flag = false;
}
//}
//else
//{
// System.Windows.Forms.MessageBox.Show("未能连接设备,请检查设备连接及是否有其他程序占用!");
//}
}
/// <summary>
/// 抓图到制定的路径
/// </summary>
/// <param name="path"></param>
public void grabImage(string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
AviCapture.SendMessage(lwndC, AviCapture.WM_CAP_FILE_SAVEDIB, 0, hBmp.ToInt32());
}
/// <summary>
/// 弹出视频格式设置对话框
/// </summary>
public void setCaptureFormat()
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_DLG_VIDEOFORMAT, 0, 0);
// 是否由新的图像尺寸?
// 如果有,发送通知给父窗口,告诉它尺寸改变了
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_GET_STATUS, AviCapture.SizeOf(CapStatus), ref CapStatus);//获得当前视频流的尺寸 存入CapStatus结构
}
/// <summary>
/// 开始录像
/// </summary>
/// <param name="path">要保存录像的路径</param>
public void StarKinescope(string path)
{
IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_FILE_SET_CAPTURE_FILE, 0, hBmp.ToInt32());
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_SEQUENCE, 0, 0);
}
/// <summary>
/// 停止录像
/// </summary>
public void StopKinescope()
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_STOP, 0, 0);
}
public void setVideoCompression()
{
AviCapture.SendMessage(this.lwndC, AviCapture.WM_CAP_DLG_VIDEOCOMPRESSION, 0, 0);
}
}
}
3、建立窗体form1
定义按钮录象(button1)、停止录象(button2)
在 Form1.Designer.cs中定义video
namespace CamaraMonitor
{
partial class Form1
{
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.IContainer components = null;
Video video;
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
/// <param name="disposing">如果应释放托管资源,为 true;否则为 false。</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
................(略)
}
}
4、然后编写调用代码form1.cs
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
namespace CamaraMonitor
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public void VideoShow()
{
video = new Video(panelPreview.Handle, panelPreview.Width, panelPreview.Height);
video.StartWebCam();
video.get();
video.Capparms.fYield = true;
video.Capparms.fAbortLeftMouse = false;
video.Capparms.fAbortRightMouse = false;
video.set();
}
private void Form1_Load(object sender, EventArgs e)
{
this.VideoShow();
}
/// <summary>
/// 开始录象
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
MessageBox.Show("开始录象!");
video.StarKinescope("d://" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".avi"); //"c://" + System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".avi");
}
private void button2_Click(object sender, EventArgs e)
{
video.CloseWebcam(0);
}
}
}
转自:http://blog.csdn.net/anya/article/details/4371256