c# 摄像头录像 及视频保存压缩等
录像是直接复制了网上的。
压缩是一个同事做的。
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;
///
///WM_CAP_START=WM_USER=1024
///
public const int WM_CAP_START = WM_USER;
// start of unicode messages
///
/// 开始 WM_USER + 100=1124
///
public const int WM_CAP_UNICODE_START = WM_USER + 100; //开始 1124
///
/// /获得 CAPSTR EAMPTR
/// WM_CAP_START + 1=1025
///
public const int WM_CAP_GET_CAPSTREAMPTR = (WM_CAP_START + 1); //获得 CAPSTR EAMPTR
///
/// 设置收回错误 WM_CAP_START + 2=1026
///
public const int WM_CAP_SET_CALLBACK_ERROR = (WM_CAP_START + 2); //设置收回错误
///
/// 设置收回状态 WM_CAP_START + 3=1027
///
public const int WM_CAP_SET_CALLBACK_STATUS = (WM_CAP_START + 3); //设置收回状态
///
/// 设置收回出产 WM_CAP_START + 4=1028
///
public const int WM_CAP_SET_CALLBACK_YIELD = (WM_CAP_START + 4); //设置收回出产
///
/// 设置收回结构 WM_CAP_START + 5=1029
///
public const int WM_CAP_SET_CALLBACK_FRame = (WM_CAP_START + 5); //设置收回结构
///
/// 设置收回视频流 WM_CAP_START + 6=1030
///
public const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = (WM_CAP_START + 6); //设置收回视频流
///
/// 设置收回视频波流 WM_CAP_START +7=1031
///
public const int WM_CAP_SET_CALLBACK_WAVESTREAM = (WM_CAP_START + 7); //设置收回视频波流
///
/// 获得使用者数据 WM_CAP_START + 8=1032
///
public const int WM_CAP_GET_USER_DATA = (WM_CAP_START + 8); //获得使用者数据
///
/// 设置使用者数据 WM_CAP_START + 9=1033
///
public const int WM_CAP_SET_USER_DATA = (WM_CAP_START + 9); //设置使用者数据
///
/// 驱动程序连接 WM_CAP_START + 10=1034
///
public const int WM_CAP_DRIVER_CONNECT = (WM_CAP_START + 10); //驱动程序连接
///
/// 断开启动程序连接 WM_CAP_START + 11=1035
///
public const int WM_CAP_DRIVER_DISCONNECT = (WM_CAP_START + 11); //断开启动程序连接
///
/// 获得驱动程序名字 WM_CAP_START + 12=1036
///
public const int WM_CAP_DRIVER_GET_NAME = (WM_CAP_START + 12); //获得驱动程序名字
///
/// 获得驱动程序版本 WM_CAP_START + 13=1037
///
public const int WM_CAP_DRIVER_GET_VERSION = (WM_CAP_START + 13); //获得驱动程序版本
///
/// 获得驱动程序帽子 WM_CAP_START + 14=1038
///
public const int WM_CAP_DRIVER_GET_CAPS = (WM_CAP_START + 14); //获得驱动程序帽子
///
/// 设置捕获文件 WM_CAP_START + 20=1044
///
public const int WM_CAP_FILE_SET_CAPTURE_FILE = (WM_CAP_START + 20); //设置捕获文件
///
/// 获得捕获文件 WM_CAP_START + 21=1045
///
public const int WM_CAP_FILE_GET_CAPTURE_FILE = (WM_CAP_START + 21); //获得捕获文件
///
/// 另存文件为 WM_CAP_START + 23=1047
///
public const int WM_CAP_FILE_SAVEAS = (WM_CAP_START + 23); //另存文件为
///
/// 保存文件 WM_CAP_START + 25=1049
///
public const int WM_CAP_FILE_SAVEDIB = (WM_CAP_START + 25); //保存文件
// out of order to save on ifdefs
///
/// 分派文件 WM_CAP_START + 22=1044
///
public const int WM_CAP_FILE_ALLOCATE = (WM_CAP_START + 22); //分派文件
///
/// 设置开始文件 WM_CAP_START + 24=1046
///
public const int WM_CAP_FILE_SET_INFOCHUNK = (WM_CAP_START + 24); //设置开始文件
///
/// 编辑复制 WM_CAP_START + 30=1054
///
public const int WM_CAP_EDIT_COPY = (WM_CAP_START + 30); //编辑复制
///
/// 设置音频格式 WM_CAP_START + 35=1059
///
public const int WM_CAP_SET_AUDIOFORMAT = (WM_CAP_START + 35); //设置音频格式
///
/// 捕获音频格式 WM_CAP_START + 36=1060
///
public const int WM_CAP_GET_AUDIOFORMAT = (WM_CAP_START + 36); //捕获音频格式
///
/// 打开视频格式设置对话框 WM_CAP_START + 41=1065
///
public const int WM_CAP_DLG_VIDEOFORMAT = (WM_CAP_START + 41); //1065 打开视频格式设置对话框
///
/// 打开属性设置对话框，设置对比度、亮度等 WM_CAP_START + 42=1066
///
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。
///
/// 打开视频显示 WM_CAP_START + 43=1067
///
public const int WM_CAP_DLG_VIDEODISPLAY = (WM_CAP_START + 43); //1067 打开视频显示
///
/// 获得视频格式 WM_CAP_START + 44=1068
///
public const int WM_CAP_GET_VIDEOFORMAT = (WM_CAP_START + 44); //1068 获得视频格式
///
/// 设置视频格式 WM_CAP_START + 45=1069
///
public const int WM_CAP_SET_VIDEOFORMAT = (WM_CAP_START + 45); //1069 设置视频格式
///
/// 打开压缩设置对话框 WM_CAP_START + 46=1070
///
public const int WM_CAP_DLG_VIDEOCOMPRESSION = (WM_CAP_START + 46); //1070 打开压缩设置对话框
///
/// 设置预览 WM_CAP_START + 50=1074
///
public const int WM_CAP_SET_PREVIEW = (WM_CAP_START + 50); //设置预览
///
/// 设置覆盖 WM_CAP_START + 51=1075
///
public const int WM_CAP_SET_OVERLAY = (WM_CAP_START + 51); //设置覆盖
///
/// 设置预览比例 WM_CAP_START + 52=1076
///
public const int WM_CAP_SET_PREVIEWRATE = (WM_CAP_START + 52); //设置预览比例
///
/// 设置刻度 WM_CAP_START + 53=1077
///
public const int WM_CAP_SET_SCALE = (WM_CAP_START + 53); //设置刻度
///
/// 获得状态 WM_CAP_START + 54=1078
///
public const int WM_CAP_GET_STATUS = (WM_CAP_START + 54); //获得状态
///
/// 设置卷 WM_CAP_START + 55=1079
///
public const int WM_CAP_SET_SCROLL = (WM_CAP_START + 55); //设置卷
///
/// 逮捕结构 WM_CAP_START + 60=1084
///
public const int WM_CAP_GRAB_FRame = (WM_CAP_START + 60); //逮捕结构
///
/// 停止逮捕结构 WM_CAP_START + 61=1085
///
public const int WM_CAP_GRAB_FRame_NOSTOP = (WM_CAP_START + 61); //停止逮捕结构
///
/// 次序 WM_CAP_START + 62=1086
///
public const int WM_CAP_SEQUENCE = (WM_CAP_START + 62); //次序
///
/// 没有文件 WM_CAP_START + 63=1087
///
public const int WM_CAP_SEQUENCE_NOFILE = (WM_CAP_START + 63); //没有文件
///
/// 设置安装次序 WM_CAP_START + 64=1088
///
public const int WM_CAP_SET_SEQUENCE_SETUP = (WM_CAP_START + 64); //设置安装次序
///
/// 获得安装次序 WM_CAP_START + 65=1089
///
public const int WM_CAP_GET_SEQUENCE_SETUP = (WM_CAP_START + 65); //获得安装次序
///
/// 设置媒体控制接口 WM_CAP_START + 66=1090
///
public const int WM_CAP_SET_MCI_DEVICE = (WM_CAP_START + 66); //设置媒体控制接口
///
/// 获得媒体控制接口 WM_CAP_START + 67=1091
///
public const int WM_CAP_GET_MCI_DEVICE = (WM_CAP_START + 67); //获得媒体控制接口
///
/// 停止 WM_CAP_START + 68=1092
///
public const int WM_CAP_STOP = (WM_CAP_START + 68); //停止
///
/// 异常中断 WM_CAP_START + 69=1093
///
public const int WM_CAP_ABORT = (WM_CAP_START + 69); //异常中断
///
/// 打开单一的结构 WM_CAP_START + 68=1094
///
public const int WM_CAP_SINGLE_FRame_OPEN = (WM_CAP_START + 70); //打开单一的结构
///
/// 关闭单一的结构 WM_CAP_START + 71=1095
///
public const int WM_CAP_SINGLE_FRame_CLOSE = (WM_CAP_START + 71); //关闭单一的结构
///
/// 单一的结构 WM_CAP_START + 72=1096
///
public const int WM_CAP_SINGLE_FRame = (WM_CAP_START + 72); //单一的结构
///
/// 打开视频 WM_CAP_START + 80=1104
///
public const int WM_CAP_PAL_OPEN = (WM_CAP_START + 80); //打开视频
///
/// 保存视频 WM_CAP_START + 81=1105
///
public const int WM_CAP_PAL_SAVE = (WM_CAP_START + 81); //保存视频
///
/// 粘贴视频 WM_CAP_START + 82=1106
///
public const int WM_CAP_PAL_PASTE = (WM_CAP_START + 82); //粘贴视频
///
/// 自动创造 WM_CAP_START + 83=1107
///
public const int WM_CAP_PAL_AUTOCREATE = (WM_CAP_START + 83); //自动创造
///
/// 手动创造 WM_CAP_START + 84=1108
///
public const int WM_CAP_PAL_MANUALCREATE = (WM_CAP_START + 84); //手动创造
// Following added post VFW 1.1
///
/// 设置收回的错误 WM_CAP_START + 85=1109
///
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
}
///
/// 打开视频设备
///
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);
}
///
/// 关闭视频设备
///
public void CloseWebcam()
{
VideoAPI.SendMessage(lwndC, VideoAPI.WM_CAP_DRIVER_DISCONNECT, 0, 0);
}
///
/// 拍照
///
///
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);
}
///
/// 停止录像
///
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();