c# 调用摄像头进行视频录制和压缩等
来源：互联网 发布：php继承一个普通类 编辑：程序博客网 时间：2024/06/05 15:42
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Drawing; using System.Runtime.InteropServices; using System.Threading; using System.Windows.Forms; using System.IO; namespace Basic { public class VideoAPI //视频API类 { // 视频ＡＰＩ调用 [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("avicap32.dll")] public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID); [DllImport("avicap32.dll")] public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] 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); // 常量 // public const int WM_USER = 0x400; 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_DRIVER_CONNECT = WM_USER + 10; // public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11; public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5; // public const int WM_CAP_SET_PREVIEW = WM_USER + 50; // public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52; // public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45; // public const int WM_CAP_START = WM_USER; public const int WM_CAP_SAVEDIB = WM_CAP_START + 25; public const string avicap32 = "avicap32.dll"; public const int WM_USER = 1024; /// <summary> ///WM_CAP_START=WM_USER=1024 /// </summary> public const int WM_CAP_START = WM_USER; // start of unicode messages /// <summary> /// 开始 WM_USER + 100=1124 /// </summary> public const int WM_CAP_UNICODE_START = WM_USER + 100; //开始 1124 /// <summary> /// /获得 CAPSTR EAMPTR /// WM_CAP_START + 1=1025 /// </summary> public const int WM_CAP_GET_CAPSTREAMPTR = (WM_CAP_START + 1); //获得 CAPSTR EAMPTR /// <summary> /// 设置收回错误 WM_CAP_START + 2=1026 /// </summary> public const int WM_CAP_SET_CALLBACK_ERROR = (WM_CAP_START + 2); //设置收回错误 /// <summary> /// 设置收回状态 WM_CAP_START + 3=1027 /// </summary> public const int WM_CAP_SET_CALLBACK_STATUS = (WM_CAP_START + 3); //设置收回状态 /// <summary> /// 设置收回出产 WM_CAP_START + 4=1028 /// </summary> public const int WM_CAP_SET_CALLBACK_YIELD = (WM_CAP_START + 4); //设置收回出产 /// <summary> /// 设置收回结构 WM_CAP_START + 5=1029 /// </summary> public const int WM_CAP_SET_CALLBACK_FRame = (WM_CAP_START + 5); //设置收回结构 /// <summary> /// 设置收回视频流 WM_CAP_START + 6=1030 /// </summary> public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = (WM_CAP_START + 6); //设置收回视频流 /// <summary> /// 设置收回视频波流 WM_CAP_START +7=1031 /// </summary> public const int WM_CAP_SET_CALLBACK_WAVESTREAM = (WM_CAP_START + 7); //设置收回视频波流 /// <summary> /// 获得使用者数据 WM_CAP_START + 8=1032 /// </summary> public const int WM_CAP_GET_USER_DATA = (WM_CAP_START + 8); //获得使用者数据 /// <summary> /// 设置使用者数据 WM_CAP_START + 9=1033 /// </summary> public const int WM_CAP_SET_USER_DATA = (WM_CAP_START + 9); //设置使用者数据 /// <summary> /// 驱动程序连接 WM_CAP_START + 10=1034 /// </summary> public const int WM_CAP_DRIVER_CONNECT = (WM_CAP_START + 10); //驱动程序连接 /// <summary> /// 断开启动程序连接 WM_CAP_START + 11=1035 /// </summary> public const int WM_CAP_DRIVER_DISCONNECT = (WM_CAP_START + 11); //断开启动程序连接 /// <summary> /// 获得驱动程序名字 WM_CAP_START + 12=1036 /// </summary> public const int WM_CAP_DRIVER_GET_NAME = (WM_CAP_START + 12); //获得驱动程序名字 /// <summary> /// 获得驱动程序版本 WM_CAP_START + 13=1037 /// </summary> public const int WM_CAP_DRIVER_GET_VERSION = (WM_CAP_START + 13); //获得驱动程序版本 /// <summary> /// 获得驱动程序帽子 WM_CAP_START + 14=1038 /// </summary> public const int WM_CAP_DRIVER_GET_CAPS = (WM_CAP_START + 14); //获得驱动程序帽子 /// <summary> /// 设置捕获文件 WM_CAP_START + 20=1044 /// </summary> public const int WM_CAP_FILE_SET_CAPTURE_FILE = (WM_CAP_START + 20); //设置捕获文件 /// <summary> /// 获得捕获文件 WM_CAP_START + 21=1045 /// </summary> public const int WM_CAP_FILE_GET_CAPTURE_FILE = (WM_CAP_START + 21); //获得捕获文件 /// <summary> /// 另存文件为 WM_CAP_START + 23=1047 /// </summary> public const int WM_CAP_FILE_SAVEAS = (WM_CAP_START + 23); //另存文件为 /// <summary> /// 保存文件 WM_CAP_START + 25=1049 /// </summary> public const int WM_CAP_FILE_SAVEDIB = (WM_CAP_START + 25); //保存文件 // out of order to save on ifdefs /// <summary> /// 分派文件 WM_CAP_START + 22=1044 /// </summary> public const int WM_CAP_FILE_ALLOCATE = (WM_CAP_START + 22); //分派文件 /// <summary> /// 设置开始文件 WM_CAP_START + 24=1046 /// </summary> public const int WM_CAP_FILE_SET_INFOCHUNK = (WM_CAP_START + 24); //设置开始文件 /// <summary> /// 编辑复制 WM_CAP_START + 30=1054 /// </summary> public const int WM_CAP_EDIT_COPY = (WM_CAP_START + 30); //编辑复制 /// <summary> /// 设置音频格式 WM_CAP_START + 35=1059 /// </summary> public const int WM_CAP_SET_AUDIOFORMAT = (WM_CAP_START + 35); //设置音频格式 /// <summary> /// 捕获音频格式 WM_CAP_START + 36=1060 /// </summary> public const int WM_CAP_GET_AUDIOFORMAT = (WM_CAP_START + 36); //捕获音频格式 /// <summary> /// 打开视频格式设置对话框 WM_CAP_START + 41=1065 /// </summary> public const int WM_CAP_DLG_VIDEOFORMAT = (WM_CAP_START + 41); //1065 打开视频格式设置对话框 /// <summary> /// 打开属性设置对话框，设置对比度、亮度等 WM_CAP_START + 42=1066 /// </summary> public const int WM_CAP_DLG_VIDEOSOURCE = (WM_CAP_START + 42); //1066 打开属性设置对话框，设置对比度、亮度等。 /// <summary> /// 打开视频显示 WM_CAP_START + 43=1067 /// </summary> public const int WM_CAP_DLG_VIDEODISPLAY = (WM_CAP_START + 43); //1067 打开视频显示 /// <summary> /// 获得视频格式 WM_CAP_START + 44=1068 /// </summary> public const int WM_CAP_GET_VIDEOFORMAT = (WM_CAP_START + 44); //1068 获得视频格式 /// <summary> /// 设置视频格式 WM_CAP_START + 45=1069 /// </summary> public const int WM_CAP_SET_VIDEOFORMAT = (WM_CAP_START + 45); //1069 设置视频格式 /// <summary> /// 打开压缩设置对话框 WM_CAP_START + 46=1070 /// </summary> public const int WM_CAP_DLG_VIDEOCOMPRESSION = (WM_CAP_START + 46); //1070 打开压缩设置对话框 /// <summary> /// 设置预览 WM_CAP_START + 50=1074 /// </summary> public const int WM_CAP_SET_PREVIEW = (WM_CAP_START + 50); //设置预览 /// <summary> /// 设置覆盖 WM_CAP_START + 51=1075 /// </summary> public const int WM_CAP_SET_OVERLAY = (WM_CAP_START + 51); //设置覆盖 /// <summary> /// 设置预览比例 WM_CAP_START + 52=1076 /// </summary> public const int WM_CAP_SET_PREVIEWRATE = (WM_CAP_START + 52); //设置预览比例 /// <summary> /// 设置刻度 WM_CAP_START + 53=1077 /// </summary> public const int WM_CAP_SET_SCALE = (WM_CAP_START + 53); //设置刻度 /// <summary> /// 获得状态 WM_CAP_START + 54=1078 /// </summary> public const int WM_CAP_GET_STATUS = (WM_CAP_START + 54); //获得状态 /// <summary> /// 设置卷 WM_CAP_START + 55=1079 /// </summary> public const int WM_CAP_SET_SCROLL = (WM_CAP_START + 55); //设置卷 /// <summary> /// 逮捕结构 WM_CAP_START + 60=1084 /// </summary> public const int WM_CAP_GRAB_FRame = (WM_CAP_START + 60); //逮捕结构 /// <summary> /// 停止逮捕结构 WM_CAP_START + 61=1085 /// </summary> public const int WM_CAP_GRAB_FRame_NOSTOP = (WM_CAP_START + 61); //停止逮捕结构 /// <summary> /// 次序 WM_CAP_START + 62=1086 /// </summary> public const int WM_CAP_SEQUENCE = (WM_CAP_START + 62); //次序 /// <summary> /// 没有文件 WM_CAP_START + 63=1087 /// </summary> public const int WM_CAP_SEQUENCE_NOFILE = (WM_CAP_START + 63); //没有文件 /// <summary> /// 设置安装次序 WM_CAP_START + 64=1088 /// </summary> public const int WM_CAP_SET_SEQUENCE_SETUP = (WM_CAP_START + 64); //设置安装次序 /// <summary> /// 获得安装次序 WM_CAP_START + 65=1089 /// </summary> public const int WM_CAP_GET_SEQUENCE_SETUP = (WM_CAP_START + 65); //获得安装次序 /// <summary> /// 设置媒体控制接口 WM_CAP_START + 66=1090 /// </summary> public const int WM_CAP_SET_MCI_DEVICE = (WM_CAP_START + 66); //设置媒体控制接口 /// <summary> /// 获得媒体控制接口 WM_CAP_START + 67=1091 /// </summary> public const int WM_CAP_GET_MCI_DEVICE = (WM_CAP_START + 67); //获得媒体控制接口 /// <summary> /// 停止 WM_CAP_START + 68=1092 /// </summary> public const int WM_CAP_STOP = (WM_CAP_START + 68); //停止 /// <summary> /// 异常中断 WM_CAP_START + 69=1093 /// </summary> public const int WM_CAP_ABORT = (WM_CAP_START + 69); //异常中断 /// <summary> /// 打开单一的结构 WM_CAP_START + 68=1094 /// </summary> public const int WM_CAP_SINGLE_FRame_OPEN = (WM_CAP_START + 70); //打开单一的结构 /// <summary> /// 关闭单一的结构 WM_CAP_START + 71=1095 /// </summary> public const int WM_CAP_SINGLE_FRame_CLOSE = (WM_CAP_START + 71); //关闭单一的结构 /// <summary> /// 单一的结构 WM_CAP_START + 72=1096 /// </summary> public const int WM_CAP_SINGLE_FRame = (WM_CAP_START + 72); //单一的结构 /// <summary> /// 打开视频 WM_CAP_START + 80=1104 /// </summary> public const int WM_CAP_PAL_OPEN = (WM_CAP_START + 80); //打开视频 /// <summary> /// 保存视频 WM_CAP_START + 81=1105 /// </summary> public const int WM_CAP_PAL_SAVE = (WM_CAP_START + 81); //保存视频 /// <summary> /// 粘贴视频 WM_CAP_START + 82=1106 /// </summary> public const int WM_CAP_PAL_PASTE = (WM_CAP_START + 82); //粘贴视频 /// <summary> /// 自动创造 WM_CAP_START + 83=1107 /// </summary> public const int WM_CAP_PAL_AUTOCREATE = (WM_CAP_START + 83); //自动创造 /// <summary> /// 手动创造 WM_CAP_START + 84=1108 /// </summary> public const int WM_CAP_PAL_MANUALCREATE = (WM_CAP_START + 84); //手动创造 // Following added post VFW 1.1 /// <summary> /// 设置收回的错误 WM_CAP_START + 85=1109 /// </summary> public const int WM_CAP_SET_CALLBACK_CAPCONTROL = (WM_CAP_START + 85); // 设置收回的错误 public const int WM_CAP_END = WM_CAP_SET_CALLBACK_CAPCONTROL; 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 #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 class cVideo //视频类 { public bool flag = true; private IntPtr lwndC; //保存无符号句柄 private IntPtr mControlPtr; //保存管理指示器 private int mWidth; private int mHeight; public delegate void RecievedFrameEventHandler(byte[] data); public event RecievedFrameEventHandler RecievedFrame; public VideoAPI.CAPTUREPARMS Capparms; private VideoAPI.FrameEventHandler mFrameEventHandler; public VideoAPI.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 VideoAPI.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 string strFileName; public cVideo(IntPtr handle, int width, int height) { CapDriverCAPS = new VideoAPI.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 VideoAPI.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; //显示视频控件的句柄 mWidth = width; //视频宽度 mHeight = height; //视频高度 } /// <summary> /// 打开视频设备 /// </summary> public bool StartWebCam() { //byte[] lpszName = new byte[100]; //byte[] lpszVer = new byte[100]; //VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100); //this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0); //if (VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0)) //{ // VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0); // VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0); // return true; //} //else //{ // return false; //} this.lwndC = VideoAPI.capCreateCaptureWindow("", VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);//AVICap类的捕捉窗口 VideoAPI.FrameEventHandler FrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback); VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_ERROR, 0, 0);//注册错误回调函数 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_STATUS, 0, 0);//注册状态回调函数 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);//注册视频流回调函数 VideoAPI.SendMessage(this.lwndC, VideoAPI.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 (VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0)) { //----------------------------------------------------------------------- VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_GET_CAPS, VideoAPI.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； VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_STATUS, VideoAPI.SizeOf(CapStatus), ref CapStatus);//获得当前视频流的尺寸 存入CapStatus结构 VideoAPI.BITMAPINFO bitmapInfo = new VideoAPI.BITMAPINFO();//设置视频格式 (height and width in pixels, bits per frame). bitmapInfo.bmiHeader = new VideoAPI.BITMAPINFOHEADER(); bitmapInfo.bmiHeader.biSize = VideoAPI.SizeOf(bitmapInfo.bmiHeader); bitmapInfo.bmiHeader.biWidth = mWidth; bitmapInfo.bmiHeader.biHeight = mHeight; bitmapInfo.bmiHeader.biPlanes = 1; bitmapInfo.bmiHeader.biBitCount = 24; VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 40, 0);//设置在PREVIEW模式下设定视频窗口的刷新率 设置每40毫秒显示一帧，即显示帧速为每秒25帧 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SCALE, 1, 0);//打开预览视频的缩放比例 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_VIDEOFORMAT, VideoAPI.SizeOf(bitmapInfo), ref bitmapInfo); this.mFrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback); this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler); VideoAPI.CAPTUREPARMS captureparms = new VideoAPI.CAPTUREPARMS(); VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(captureparms), ref captureparms); if (CapDriverCAPS.fHasOverlay) { VideoAPI.SendMessage(this.lwndC, VideoAPI.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 } VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);//设置显示图像启动预览模式 PREVIEW VideoAPI.SetWindowPos(this.lwndC, 0, 0, 0, mWidth, mHeight, VideoAPI.SWP_NOZORDER | VideoAPI.SWP_NOMOVE);//使捕获窗口与进来的视频流尺寸保持一致 return true; } else { flag = false; return false; } } public void get() { VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(Capparms), ref Capparms); } public void set() { VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SEQUENCE_SETUP, VideoAPI.SizeOf(Capparms), ref Capparms); } private bool capSetCallbackOnFrame(IntPtr lwnd, VideoAPI.FrameEventHandler lpProc) { return VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc); } /// <summary> /// 关闭视频设备 /// </summary> public void CloseWebcam() { VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0); } /// <summary> /// 拍照 /// </summary> /// <param name="path">要保存bmp文件的路径</param> public void GrabImage(IntPtr hWndC, string path) { IntPtr hBmp = Marshal.StringToHGlobalAnsi(path); VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SAVEDIB, 0, hBmp.ToInt32()); } public void StarKinescope(string path) { strFileName = path; string dir=path.Remove(path.LastIndexOf("//")); if (!File.Exists(dir)) { Directory.CreateDirectory(dir); } int hBmp = Marshal.StringToHGlobalAnsi(path).ToInt32(); bool b= VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_FILE_SET_CAPTURE_FILE, 0, hBmp); b= VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SEQUENCE, 0, 0); } /// <summary> /// 停止录像 /// </summary> public void StopKinescope() { VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_STOP, 0, 0); } private void FrameCallback(IntPtr lwnd, IntPtr lpvhdr) { VideoAPI.VIDEOHDR videoHeader = new VideoAPI.VIDEOHDR(); byte[] VideoData; videoHeader = (VideoAPI.VIDEOHDR)VideoAPI.GetStructure(lpvhdr, videoHeader); VideoData = new byte[videoHeader.dwBytesUsed]; VideoAPI.Copy(videoHeader.lpData, VideoData); if (this.RecievedFrame != null) this.RecievedFrame(VideoData); } private Thread myThread; public void CompressVideoFfmpeg() { //myThread = new Thread(new ThreadStart(testfn)); //myThread.Start(); testfn(); } private void testfn() // 压缩视频 { string file_name = strFileName; string command_line = " -i " + file_name + " -vcodec libx264 -cqp 25 -y " + file_name.Replace(".avi", "_264") + ".avi"; System.Diagnostics.Process proc = new System.Diagnostics.Process(); proc.StartInfo.WorkingDirectory = Application.StartupPath; proc.StartInfo.UseShellExecute = false; //use false if you want to hide the window proc.StartInfo.CreateNoWindow = true; proc.StartInfo.FileName = "ffmpeg"; proc.StartInfo.Arguments = command_line; proc.Start(); proc.WaitForExit(); proc.Close(); // 删除原始avi文件 FileInfo file = new FileInfo(file_name); if (file.Exists) { try { file.Delete(); //删除单个文件 } catch(Exception e) { Common.writeLog("删除视频文件“"+file_name+"”出错！"+e.Message); } } //myThread.Abort(); } } } 用到的压缩软件http://download.csdn.net/source/2453028 调用： cVideo video = new cVideo(picCapture.Handle, 640, 480); //打开视频 if (video.StartWebCam(320, 240)) { video.get(); video.Capparms.fYield = true; video.Capparms.fAbortLeftMouse = false; video.Capparms.fAbortRightMouse = false; video.Capparms.fCaptureAudio = false; video.Capparms.dwRequestMicroSecPerFrame = 0x9C40; // 设定帧率25fps： 1*1000000/25 = 0x9C40 video.set(); setCap(); VideoStart = true; } //开始录像 video.StarKinescope(System.IO.Path.Combine(Record.VideoDir, System.DateTime.Now.ToString("yyyy-MM-dd(HH.mm.ss)") + ".avi"))) //停止录像 video.StopKinescope(); //压缩（压缩效率还是很低，不要用于实际开发） video.CompressVideoFfmpeg(); 0 0
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