1 using System;  2 using System.Collections.Generic;  3 using System.Linq;  4 using System.Text;  5 using System.Drawing;  6 using System.Runtime.InteropServices;  7 using System.Threading;  8 using System.Windows.Forms;  9 using System.IO; 10  11 namespace Basic 12 { 13     public class VideoAPI  //视频API类 14     { 15         //  视频ＡＰＩ调用 16         [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 17         public static extern IntPtr capCreateCaptureWindow(string lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hwndParent, int nID); 18         [DllImport("AVICAP32.dll", CharSet = CharSet.Unicode)] 19         public static extern bool capGetDriverDescription(int wDriverIndex, StringBuilder lpszName, int cbName, StringBuilder lpszVer, int cbVer); 20         [DllImport("avicap32.dll")] 21         public static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID); 22         [DllImport("avicap32.dll")] 23         public static extern bool capGetDriverDescriptionA(short wDriver, byte[] lpszName, int cbName, byte[] lpszVer, int cbVer); 24         [DllImport("User32.dll")] 25         public static extern bool SendMessage(IntPtr hWnd, int wMsg, bool wParam, int lParam); 26         [DllImport("User32.dll")] 27         public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, int lParam); 28         [DllImport("User32.dll")] 29         public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, int lParam); 30         [DllImport("User32.dll")] 31         public static extern bool SendMessage(IntPtr hWnd, int wMsg, short wParam, FrameEventHandler lParam); 32         [DllImport("User32.dll")] 33         public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref BITMAPINFO lParam); 34         [DllImport("User32.dll")] 35         public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPDRIVERCAPS lParam); 36         [DllImport("User32.dll")] 37         public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPTUREPARMS lParam); 38         [DllImport("User32.dll")] 39         public static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, ref CAPSTATUS lParam); 40         [DllImport("User32.dll")] 41         public static extern int SetWindowPos(IntPtr hWnd, int hWndInsertAfter, int x, int y, int cx, int cy, int wFlags); 42         [DllImport("avicap32.dll")] 43         public static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize); 44  45         //  常量 46         // public const int WM_USER = 0x400; 47         public const int WS_CHILD = 0x40000000; 48         public const int WS_VISIBLE = 0x10000000; 49  50         public const int SWP_NOMOVE = 0x2; 51         public const int SWP_NOZORDER = 0x4; 52         // public const int WM_CAP_DRIVER_CONNECT = WM_USER + 10; 53         //   public const int WM_CAP_DRIVER_DISCONNECT = WM_USER + 11; 54         public const int WM_CAP_SET_CALLBACK_FRAME = WM_USER + 5; 55         //   public const int WM_CAP_SET_PREVIEW = WM_USER + 50; 56         //  public const int WM_CAP_SET_PREVIEWRATE = WM_USER + 52; 57         //  public const int WM_CAP_SET_VIDEOFORMAT = WM_USER + 45; 58         //   public const int WM_CAP_START = WM_USER; 59         public const int WM_CAP_SAVEDIB = WM_CAP_START + 25; 60  61         public const string avicap32 = "avicap32.dll"; 62         public const int WM_USER = 1024; 63         /// <summary> 64         ///WM_CAP_START=WM_USER=1024 65         /// </summary> 66         public const int WM_CAP_START = WM_USER; 67  68         // start of unicode messages 69         /// <summary> 70         /// 开始   WM_USER + 100=1124 71         /// </summary> 72         public const int WM_CAP_UNICODE_START = WM_USER + 100; //开始   1124 73         /// <summary> 74         /// /获得 CAPSTR EAMPTR    75         /// WM_CAP_START + 1=1025 76         /// </summary> 77         public const int WM_CAP_GET_CAPSTREAMPTR = (WM_CAP_START + 1); //获得 CAPSTR EAMPTR 78         /// <summary> 79         /// 设置收回错误   WM_CAP_START + 2=1026 80         /// </summary> 81         public const int WM_CAP_SET_CALLBACK_ERROR = (WM_CAP_START + 2); //设置收回错误 82         /// <summary> 83         /// 设置收回状态 WM_CAP_START + 3=1027 84         /// </summary> 85         public const int WM_CAP_SET_CALLBACK_STATUS = (WM_CAP_START + 3); //设置收回状态 86         /// <summary> 87         /// 设置收回出产  WM_CAP_START + 4=1028 88         /// </summary> 89         public const int WM_CAP_SET_CALLBACK_YIELD = (WM_CAP_START + 4); //设置收回出产 90         /// <summary> 91         /// 设置收回结构  WM_CAP_START + 5=1029 92         /// </summary> 93         public const int WM_CAP_SET_CALLBACK_FRame = (WM_CAP_START + 5); //设置收回结构 94         /// <summary> 95         /// 设置收回视频流  WM_CAP_START + 6=1030 96         /// </summary> 97         public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = (WM_CAP_START + 6); //设置收回视频流 98         /// <summary> 99         /// 设置收回视频波流  WM_CAP_START +7=1031100         /// </summary>101         public const int WM_CAP_SET_CALLBACK_WAVESTREAM = (WM_CAP_START + 7); //设置收回视频波流102         /// <summary>103         /// 获得使用者数据 WM_CAP_START + 8=1032104         /// </summary>105         public const int WM_CAP_GET_USER_DATA = http://www.mamicode.com/(WM_CAP_START + 8); //获得使用者数据106         /// <summary>107         /// 设置使用者数据 WM_CAP_START + 9=1033108         /// </summary>109         public const int WM_CAP_SET_USER_DATA = http://www.mamicode.com/(WM_CAP_START + 9); //设置使用者数据110         /// <summary>111         /// 驱动程序连接  WM_CAP_START + 10=1034112         /// </summary>113         public const int WM_CAP_DRIVER_CONNECT = (WM_CAP_START + 10); //驱动程序连接114         /// <summary>115         /// 断开启动程序连接 WM_CAP_START + 11=1035116         /// </summary>117         public const int WM_CAP_DRIVER_DISCONNECT = (WM_CAP_START + 11); //断开启动程序连接118         /// <summary>119         /// 获得驱动程序名字 WM_CAP_START + 12=1036120         /// </summary>121         public const int WM_CAP_DRIVER_GET_NAME = (WM_CAP_START + 12); //获得驱动程序名字122         /// <summary>123         /// 获得驱动程序版本 WM_CAP_START + 13=1037124         /// </summary>125         public const int WM_CAP_DRIVER_GET_VERSION = (WM_CAP_START + 13); //获得驱动程序版本126         /// <summary>127         /// 获得驱动程序帽子 WM_CAP_START + 14=1038128         /// </summary>129         public const int WM_CAP_DRIVER_GET_CAPS = (WM_CAP_START + 14); //获得驱动程序帽子130         /// <summary>131         /// 设置捕获文件 WM_CAP_START + 20=1044132         /// </summary>133         public const int WM_CAP_FILE_SET_CAPTURE_FILE = (WM_CAP_START + 20); //设置捕获文件134         /// <summary>135         /// 获得捕获文件 WM_CAP_START + 21=1045136         /// </summary>137         public const int WM_CAP_FILE_GET_CAPTURE_FILE = (WM_CAP_START + 21); //获得捕获文件138         /// <summary>139         /// 另存文件为  WM_CAP_START + 23=1047140         /// </summary>141         public const int WM_CAP_FILE_SAVEAS = (WM_CAP_START + 23); //另存文件为142         /// <summary>143         /// 保存文件    WM_CAP_START + 25=1049144         /// </summary>145         public const int WM_CAP_FILE_SAVEDIB = (WM_CAP_START + 25); //保存文件146 147         // out of order to save on ifdefs148         /// <summary>149         /// 分派文件  WM_CAP_START + 22=1044150         /// </summary>151         public const int WM_CAP_FILE_ALLOCATE = (WM_CAP_START + 22); //分派文件152         /// <summary>153         /// 设置开始文件  WM_CAP_START + 24=1046154         /// </summary>155         public const int WM_CAP_FILE_SET_INFOCHUNK = (WM_CAP_START + 24); //设置开始文件156         /// <summary>157         /// 编辑复制   WM_CAP_START + 30=1054158         /// </summary>159         public const int WM_CAP_EDIT_COPY = (WM_CAP_START + 30); //编辑复制160         /// <summary>161         /// 设置音频格式  WM_CAP_START + 35=1059162         /// </summary>163         public const int WM_CAP_SET_AUDIOFORMAT = (WM_CAP_START + 35); //设置音频格式164         /// <summary>165         /// 捕获音频格式  WM_CAP_START + 36=1060166         /// </summary>167         public const int WM_CAP_GET_AUDIOFORMAT = (WM_CAP_START + 36); //捕获音频格式168         /// <summary>169         /// 打开视频格式设置对话框  WM_CAP_START + 41=1065170         /// </summary>171         public const int WM_CAP_DLG_VIDEOFORMAT = (WM_CAP_START + 41); //1065 打开视频格式设置对话框172         /// <summary>173         /// 打开属性设置对话框，设置对比度、亮度等   WM_CAP_START + 42=1066174         /// </summary>175         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。176         /// <summary>177         /// 打开视频显示 WM_CAP_START + 43=1067178         /// </summary>179         public const int WM_CAP_DLG_VIDEODISPLAY = (WM_CAP_START + 43); //1067 打开视频显示180         /// <summary>181         /// 获得视频格式 WM_CAP_START + 44=1068182         /// </summary>183         public const int WM_CAP_GET_VIDEOFORMAT = (WM_CAP_START + 44); //1068 获得视频格式184         /// <summary>185         /// 设置视频格式 WM_CAP_START + 45=1069186         /// </summary>187         public const int WM_CAP_SET_VIDEOFORMAT = (WM_CAP_START + 45); //1069 设置视频格式188         /// <summary>189         /// 打开压缩设置对话框 WM_CAP_START + 46=1070190         /// </summary>191         public const int WM_CAP_DLG_VIDEOCOMPRESSION = (WM_CAP_START + 46); //1070 打开压缩设置对话框192         /// <summary>193         /// 设置预览 WM_CAP_START + 50=1074194         /// </summary>195         public const int WM_CAP_SET_PREVIEW = (WM_CAP_START + 50); //设置预览196         /// <summary>197         /// 设置覆盖 WM_CAP_START + 51=1075198         /// </summary>199         public const int WM_CAP_SET_OVERLAY = (WM_CAP_START + 51); //设置覆盖200         /// <summary>201         /// 设置预览比例 WM_CAP_START + 52=1076202         /// </summary>203         public const int WM_CAP_SET_PREVIEWRATE = (WM_CAP_START + 52); //设置预览比例204         /// <summary>205         /// 设置刻度 WM_CAP_START + 53=1077206         /// </summary>207         public const int WM_CAP_SET_SCALE = (WM_CAP_START + 53); //设置刻度208         /// <summary> 209         /// 获得状态 WM_CAP_START + 54=1078210         /// </summary>211         public const int WM_CAP_GET_STATUS = (WM_CAP_START + 54); //获得状态212         /// <summary>213         /// 设置卷 WM_CAP_START + 55=1079214         /// </summary>215         public const int WM_CAP_SET_SCROLL = (WM_CAP_START + 55); //设置卷216         /// <summary>217         /// 逮捕结构 WM_CAP_START + 60=1084218         /// </summary>219         public const int WM_CAP_GRAB_FRame = (WM_CAP_START + 60); //逮捕结构220         /// <summary>221         /// 停止逮捕结构 WM_CAP_START + 61=1085222         /// </summary>223         public const int WM_CAP_GRAB_FRame_NOSTOP = (WM_CAP_START + 61); //停止逮捕结构224         /// <summary>225         /// 次序 WM_CAP_START + 62=1086226         /// </summary>227         public const int WM_CAP_SEQUENCE = (WM_CAP_START + 62); //次序228         /// <summary>229         /// 没有文件 WM_CAP_START + 63=1087230         /// </summary>231         public const int WM_CAP_SEQUENCE_NOFILE = (WM_CAP_START + 63); //没有文件232         /// <summary>233         /// 设置安装次序 WM_CAP_START + 64=1088234         /// </summary>235         public const int WM_CAP_SET_SEQUENCE_SETUP = (WM_CAP_START + 64); //设置安装次序236         /// <summary>237         /// 获得安装次序 WM_CAP_START + 65=1089238         /// </summary>239         public const int WM_CAP_GET_SEQUENCE_SETUP = (WM_CAP_START + 65); //获得安装次序240         /// <summary>241         /// 设置媒体控制接口 WM_CAP_START + 66=1090242         /// </summary>243         public const int WM_CAP_SET_MCI_DEVICE = (WM_CAP_START + 66); //设置媒体控制接口244         /// <summary>245         /// 获得媒体控制接口 WM_CAP_START + 67=1091246         /// </summary>247         public const int WM_CAP_GET_MCI_DEVICE = (WM_CAP_START + 67); //获得媒体控制接口 248         /// <summary>249         /// 停止 WM_CAP_START + 68=1092250         /// </summary>251         public const int WM_CAP_STOP = (WM_CAP_START + 68); //停止252         /// <summary>253         /// 异常中断 WM_CAP_START + 69=1093254         /// </summary>255         public const int WM_CAP_ABORT = (WM_CAP_START + 69); //异常中断256         /// <summary>257         /// 打开单一的结构 WM_CAP_START + 68=1094258         /// </summary>259         public const int WM_CAP_SINGLE_FRame_OPEN = (WM_CAP_START + 70); //打开单一的结构260         /// <summary>261         /// 关闭单一的结构 WM_CAP_START + 71=1095262         /// </summary>263         public const int WM_CAP_SINGLE_FRame_CLOSE = (WM_CAP_START + 71); //关闭单一的结构264         /// <summary>265         /// 单一的结构 WM_CAP_START + 72=1096266         /// </summary>267         public const int WM_CAP_SINGLE_FRame = (WM_CAP_START + 72); //单一的结构268         /// <summary>269         /// 打开视频 WM_CAP_START + 80=1104270         /// </summary>271         public const int WM_CAP_PAL_OPEN = (WM_CAP_START + 80); //打开视频272         /// <summary>273         /// 保存视频 WM_CAP_START + 81=1105274         /// </summary>275         public const int WM_CAP_PAL_SAVE = (WM_CAP_START + 81); //保存视频276         /// <summary>277         /// 粘贴视频 WM_CAP_START + 82=1106278         /// </summary>279         public const int WM_CAP_PAL_PASTE = (WM_CAP_START + 82); //粘贴视频280         /// <summary>281         /// 自动创造 WM_CAP_START + 83=1107282         /// </summary>283         public const int WM_CAP_PAL_AUTOCREATE = (WM_CAP_START + 83); //自动创造284         /// <summary>285         /// 手动创造 WM_CAP_START + 84=1108286         /// </summary>287         public const int WM_CAP_PAL_MANUALCREATE = (WM_CAP_START + 84); //手动创造288 289         // Following added post VFW 1.1290         /// <summary>291         /// 设置收回的错误 WM_CAP_START + 85=1109292         /// </summary>293         public const int WM_CAP_SET_CALLBACK_CAPCONTROL = (WM_CAP_START + 85); // 设置收回的错误294 295         public const int WM_CAP_END = WM_CAP_SET_CALLBACK_CAPCONTROL;296 297         public delegate void FrameEventHandler(IntPtr lwnd, IntPtr lpVHdr);298 299         #region 公共函数300         //公共函数301         public static object GetStructure(IntPtr ptr, ValueType structure)302         {303             return Marshal.PtrToStructure(ptr, structure.GetType());304         }305 306         public static object GetStructure(int ptr, ValueType structure)307         {308             return GetStructure(new IntPtr(ptr), structure);309         }310 311         public static void Copy(IntPtr ptr, byte[] data)312         {313             Marshal.Copy(ptr, data, 0, data.Length);314         }315 316         public static void Copy(int ptr, byte[] data)317         {318             Copy(new IntPtr(ptr), data);319         }320 321         public static int SizeOf(object structure)322         {323             return Marshal.SizeOf(structure);324         }325         #endregion 公共函数326         #region 结构 VIDEOHDR|BITMAPINFOHEADER|BITMAPINFO|CAPTUREPARMS|CAPDRIVERCAPS|CAPSTATUS327         //========================================================VideoHdr 结构=====================================================================328         //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）。     329         //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 330         [StructLayout(LayoutKind.Sequential)]331         public struct VIDEOHDR332         {333             public IntPtr lpData;              /* 指向数据缓存的指针 */334             public int dwBufferLength;         /* 数据缓存的大小 */335             public int dwBytesUsed;            /* Bytes actually used */336             public int dwTimeCaptured;         /* Milliseconds from start of stream */337             public int dwUser;                 /* for client‘s use */338             public int dwFlags;                /* assorted flags (see defines) */339             public int dwReserved;             /* reserved for driver */340         }341         //=======================================================BitmapInfoHeader结构===================================================================342         //BitmapInfoHeader定义了位图的头部信息343         [StructLayout(LayoutKind.Sequential)]344         public struct BITMAPINFOHEADER345         {346             public int biSize;347             public int biWidth;348             public int biHeight;349             public short biPlanes;350             public short biBitCount;351             public int biCompression;352             public int biSizeImage;353             public int biXPelsPerMeter;354             public int biYPelsPerMeter;355             public int biClrUsed;356             public int biClrImportant;357         }358         //=========================================================================================================================================359 360         //======================================================BitmapInfo结构=====================================================================361         //BitmapInfo   位图信息362         [StructLayout(LayoutKind.Sequential)]363         public struct BITMAPINFO364         {365             public BITMAPINFOHEADER bmiHeader;366             public int bmiColors;367         }368 369         //=====================================================CAPTUREPARMS结构======================================================================370         //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； 371         [StructLayout(LayoutKind.Sequential)]372         public struct CAPTUREPARMS373         {374             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。375             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。376             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。377             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。378                                                      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。*/379             public int dwIndexSize;                       // 在AVI文件中所允许的最大数目的索引项(32K)380             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)381             public bool fUsingDOSMemory;                // Use DOS buffers?382             public uint wNumVideoRequested;            // 所被允许分配的最大视频缓存383             public bool fCaptureAudio;                // 音频标志位，如果音频流正在捕获，则该值为真。384             public uint wNumAudioRequested;          // 最大数量的音频缓存，默认值为10。385             public uint vKeyAbort;                  // 终止流捕获的虚拟键盘码，默认值为VK_ESCAPE386             [MarshalAs(UnmanagedType.Bool)]387             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。388             public bool fAbortRightMouse;                 // Abort on right mouse?389             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390             public uint wTimeLimit;                     // 具体终止时间，只有 fLimitEnabled是真时.该位才有效391             public bool fMCIControl;                   // Use MCI video source?392             public bool fStepMCIDevice;               // Step MCI device?MCI 设备标志。393             public int dwMCIStartTime;               // Time to start in MS394             public int dwMCIStopTime;               // Time to stop in MS395             public bool fStepCaptureAt2x;          // Perform spatial averaging 2x396             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5397             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。398             public int fDisableWriteCache;      // Attempt to disable write cache399             public int AVStreamMaster;         //音视频同步标志。400         }401         //=========================================================================================================================================402 403         //=================================================CAPDRIVERCAPS结构=======================================================================404         //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； 405         [StructLayout(LayoutKind.Sequential)]406         public struct CAPDRIVERCAPS407         {408             [MarshalAs(UnmanagedType.U2)]409             public UInt16 wDeviceIndex;         //捕获驱动器的索引值，该值可以由0到9变化。410             [MarshalAs(UnmanagedType.Bool)]411             public bool fHasOverlay;            // 视频叠加标志，如果设备支持视频叠加这该位是真。412             [MarshalAs(UnmanagedType.Bool)]413             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。414             [MarshalAs(UnmanagedType.Bool)]415             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。416             [MarshalAs(UnmanagedType.Bool)]417             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。418             [MarshalAs(UnmanagedType.Bool)]419             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。420             //[MarshalAs(UnmanagedType.Bool)]421             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。422             [MarshalAs(UnmanagedType.I4)]423             public int hVideoIn;424             [MarshalAs(UnmanagedType.I4)]425             public int hVideoOut;426             [MarshalAs(UnmanagedType.I4)]427             public int hVideoExtIn;428             [MarshalAs(UnmanagedType.I4)]429             public int hVideoExtOut;430         }431         //=========================================================================================================================================432 433 434         //=====================================================CAPSTATUS结构========================================================================435         //CAPSTATUS定义了捕获窗口的当前状态，如图像的宽、高等；436         [StructLayout(LayoutKind.Sequential)]437         public struct CAPSTATUS438         {439             public int uiImageWidth;                         //图像宽度440             public int uiImageHeight;                       //图像高度441             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442             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。443             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。444             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。445             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446             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。447             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448             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。449             public int dwCurrentVideoFramesDropped;//当前流捕获过程中丢弃的桢的数目。450             public int dwCurrentWaveSamples;      // # of wave samples cap‘td451             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。452             public IntPtr hPalCurrent;          // 当前剪切板的句柄。453             public bool fCapturingNow;         // 捕获标志位，当捕获是正在进行时，改位是真454             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455             public int wNumVideoAllocated;   // 被分配的视频缓存的数目。456             public int wNumAudioAllocated;  // 被分配的音频缓存的数目。457         }458         //=========================================================================================================================================459 460 461         #endregion 结构 VIDEOHDR|BITMAPINFOHEADER|BITMAPINFO|CAPTUREPARMS|CAPDRIVERCAPS|CAPSTATUS462 463     }464     public class cVideo     //视频类465     {466         public bool flag = true;467         private IntPtr lwndC;       //保存无符号句柄468         private IntPtr mControlPtr; //保存管理指示器469         private int mWidth;470         private int mHeight;471         public delegate void RecievedFrameEventHandler(byte[] data);472         public event RecievedFrameEventHandler RecievedFrame;473 474         public VideoAPI.CAPTUREPARMS Capparms;475         private VideoAPI.FrameEventHandler mFrameEventHandler;476         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；477         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478         string strFileName;479         public cVideo(IntPtr handle, int width, int height)480         {481             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；482             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483             mControlPtr = handle; //显示视频控件的句柄484             mWidth = width;      //视频宽度485             mHeight = height;    //视频高度486         }487         public bool StartWebCam()488         {489            return  StartWebCam(mWidth, mHeight);490         }491        /// <summary>492         ///  打开视频设备493        /// </summary>494         /// <param name="width">捕获窗口的宽度</param>495         /// <param name="height">捕获窗口的高度</param>496        /// <returns></returns>497         public bool StartWebCam(int width,int height)498         {499             //byte[] lpszName = new byte[100];500             //byte[] lpszVer = new byte[100];501             //VideoAPI.capGetDriverDescriptionA(0, lpszName, 100, lpszVer, 100);502             //this.lwndC = VideoAPI.capCreateCaptureWindowA(lpszName, VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);503             //if (VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))504             //{505             //    VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 100, 0);506             //    VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SET_PREVIEW, true, 0);507             //    return true;508             //}509             //else510             //{511             //    return false;512             //}513             this.lwndC = VideoAPI.capCreateCaptureWindow("", VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);//AVICap类的捕捉窗口514             VideoAPI.FrameEventHandler FrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);515             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_ERROR, 0, 0);//注册错误回调函数516             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_STATUS, 0, 0);//注册状态回调函数 517             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);//注册视频流回调函数518             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, FrameEventHandler);//注册帧回调函数519 520             //if (!CapDriverCAPS.fCaptureInitialized)//判断当前设备是否被其他设备连接已经连接521             //{522 523             if (VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))524             {525                 //-----------------------------------------------------------------------526                 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；527                 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528 529                 VideoAPI.BITMAPINFO bitmapInfo = new VideoAPI.BITMAPINFO();//设置视频格式 (height and width in pixels, bits per frame). 530                 bitmapInfo.bmiHeader = new VideoAPI.BITMAPINFOHEADER();531                 bitmapInfo.bmiHeader.biSize = VideoAPI.SizeOf(bitmapInfo.bmiHeader);532                 bitmapInfo.bmiHeader.biWidth = mWidth;533                 bitmapInfo.bmiHeader.biHeight = mHeight;534                 bitmapInfo.bmiHeader.biPlanes = 1;535                 bitmapInfo.bmiHeader.biBitCount = 24;536                 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537                 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SCALE, 1, 0);//打开预览视频的缩放比例538                 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_VIDEOFORMAT, VideoAPI.SizeOf(bitmapInfo), ref bitmapInfo);539 540                 this.mFrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);541                 this.capSetCallbackOnFrame(this.lwndC, this.mFrameEventHandler);542 543 544                 VideoAPI.CAPTUREPARMS captureparms = new VideoAPI.CAPTUREPARMS();545                 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(captureparms), ref captureparms);546                 if (CapDriverCAPS.fHasOverlay)547                 {548                     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    549                 }550                 VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);//设置显示图像启动预览模式 PREVIEW551                 VideoAPI.SetWindowPos(this.lwndC, 0, 0, 0, width, height, VideoAPI.SWP_NOZORDER | VideoAPI.SWP_NOMOVE);//使捕获窗口与进来的视频流尺寸保持一致552                 return true;553             }554             else555             { 556               557                 flag = false;558                 return false;559             }560         }561         public bool   ReSizePic(int width, int height)562         {563             try564             {565               //  CloseWebcam();566               //  StartWebCam();567               //  this.lwndC = VideoAPI.capCreateCaptureWindow("", VideoAPI.WS_CHILD | VideoAPI.WS_VISIBLE, 0, 0, mWidth, mHeight, mControlPtr, 0);568 569               //  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570              //   VideoAPI.FrameEventHandler FrameEventHandler = new VideoAPI.FrameEventHandler(FrameCallback);571              //   VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_ERROR, 0, 0);//注册错误回调函数572              //   VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_STATUS, 0, 0);//注册状态回调函数 573              //   VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);//注册视频流回调函数574              //   VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, FrameEventHandler);//注册帧回调函数575              ////   if (VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_DRIVER_CONNECT, 0, 0))576              //   {577              //       VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SCALE, 1, 0);578              //       VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEWRATE, 40, 0);579              //       VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_PREVIEW, 1, 0);580 581                     return VideoAPI.SetWindowPos(this.lwndC, 0, 0, 0, width, height, VideoAPI.SWP_NOZORDER | VideoAPI.SWP_NOMOVE) > 0;582               //  }583                // return false;584             }585             catch586             {587                 return false;588             }589         }590         public void get()591         {592             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_GET_SEQUENCE_SETUP, VideoAPI.SizeOf(Capparms), ref Capparms);593         }594         public void set()595         {596             VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_SEQUENCE_SETUP, VideoAPI.SizeOf(Capparms), ref Capparms);597         }598         private bool capSetCallbackOnFrame(IntPtr lwnd, VideoAPI.FrameEventHandler lpProc)599         {600             return VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SET_CALLBACK_FRAME, 0, lpProc);601         }602         /// <summary>603         /// 关闭视频设备604         /// </summary>605         public void CloseWebcam()606         {607             VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0);608         }609         ///   <summary>   610         ///   拍照611         ///   </summary>   612         ///   <param   name="path">要保存bmp文件的路径</param>   613         public void GrabImage(IntPtr hWndC, string path)614         {615             IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);616             VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_SAVEDIB, 0, hBmp.ToInt32());617         }618         public bool StarKinescope(string path)619         {620             try621             {622                 strFileName = path;623                 string dir = path.Remove(path.LastIndexOf("\\"));624                 if (!File.Exists(dir))625                 {626                     Directory.CreateDirectory(dir);627                 }628                 int hBmp = Marshal.StringToHGlobalAnsi(path).ToInt32();629                 bool b = VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_FILE_SET_CAPTURE_FILE, 0, hBmp);630                 b = b && VideoAPI.SendMessage(this.lwndC, VideoAPI.WM_CAP_SEQUENCE, 0, 0);631                 return b;632             }633             catch634             {635                 return false;636             }637         }638         /// <summary>639         /// 停止录像640         /// </summary>641         public bool StopKinescope()642         {643           return  VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_STOP, 0, 0);644         }645         private void FrameCallback(IntPtr lwnd, IntPtr lpvhdr)646         {647             VideoAPI.VIDEOHDR videoHeader = new VideoAPI.VIDEOHDR();648             byte[] VideoData;649             videoHeader = (VideoAPI.VIDEOHDR)VideoAPI.GetStructure(lpvhdr, videoHeader);650             VideoData = http://www.mamicode.com/new byte[videoHeader.dwBytesUsed];651             VideoAPI.Copy(videoHeader.lpData, VideoData);652             if (this.RecievedFrame != null)653                 this.RecievedFrame(VideoData);654         }655         private Thread myThread;656 657         public void CompressVideoFfmpeg()658         {659             myThread = new Thread(new ThreadStart(testfn));660             myThread.Start();661             testfn();662         }663         private void testfn()664         {665             string file_name = strFileName;666             string command_line = " -i " + file_name + " -vcodec libx264 -cqp 25 -y " + file_name.Replace(".avi", "_264") + ".avi";667             System.Diagnostics.Process proc = new System.Diagnostics.Process();668             proc.StartInfo.WorkingDirectory = Application.StartupPath;669             proc.StartInfo.UseShellExecute = false; //use false if you want to hide the window670             proc.StartInfo.CreateNoWindow = true;671             proc.StartInfo.FileName = "ffmpeg";672             proc.StartInfo.Arguments = command_line;673             proc.Start();674             proc.WaitForExit();675             proc.Close();676             Common.writeLog("视频"+strFileName+"压缩完毕");677             // 删除原始avi文件678             FileInfo file = new FileInfo(file_name);679             if (file.Exists)680             {681                 try682                 {683                     file.Delete(); //删除单个文件684                 }685                 catch (Exception e)686                 {687                    // Common.writeLog("删除视频文件“" + file_name + "”出错！准备" );688                    689                     (new Thread(() =>690                     {691                         bool b = false;692                         for (int i = 0; i < 5; i++)693                         {694                             Thread.Sleep(10000*(i*i));695                             try696                             {697                                 file.Delete();698                                 b = true;699                                 break;700                             }701                             catch702                             {703                             }704                         };705                         if (!b)706                             Common.writeLog("删除视频文件“" + file_name + "”出错");707                     }708                     )).Start();709                 }710             }711             //myThread.Abort();712         }713     }714 }