AForge.net 使用之录像拍照功能实现

AForge.net 使用之录像拍照功能实现

最近使用aforge.net拍照录像功能实现

记录一下以便以后好学习，哈哈，直接上代码

连接摄像头设备，这里需要引入

AForge.Video;

AForge.Video.DirectShow;

AForge.Video.FFMPEG;

还需要添加引用，aforge.dll,aforge.control,

在工具箱中还需要添加AForge.Control，然后找到VideoSourcePlayer这个控件添加到界面上

然后定义变量

private FilterInfoCollection videoDevices;
private VideoCaptureDevice videoSource;

private bool stopREC = true;
private bool createNewFile = true;

private string videoFileFullPath = string.Empty; //视频文件全路径
private string imageFileFullPath = string.Empty; //图像文件全路径
private string videoPath = @"E:\video\"; //视频文件路径
private string imagePath = @"E:\video\images\"; //图像文件路径
private string videoFileName = string.Empty; //视频文件名
private string imageFileName = string.Empty; //图像文件名
private string drawDate = string.Empty;
private VideoFileWriter videoWriter = null;

public delegate void MyInvoke(); //定义一个委托方法

string g_s_AutoSavePath = AppDomain.CurrentDomain.BaseDirectory + "Capture\\";
object objLock = new object(); //定义一个对象的锁
int frameRate = 20; //默认帧率
private Stopwatch stopWatch = null;
IVideoSource iVideoSource = null;

private void InitUI() { //连接  //开启摄像头 videoDevices = vh.GetDevices(); if (videoDevices != null && videoDevices.Count > 0) { videoSource = vh.VideoConnect(); } videoSourcePlayer1.VideoSource = videoSource; videoSourcePlayer1.Start(); }

开始录像

 private void btnStartVideotape_Click(object sender, EventArgs e) { //开始录像 if (btnStartVideotape.Text == "开始录像") { stopREC = false; frameRate = Convert.ToInt32(txtFrameRate.Text.Trim()); btnStartVideotape.Text = "停止录像"; } else if (btnStartVideotape.Text == "停止录像") { stopREC = true; btnStartVideotape.Text = "开始录像"; } }

添加aforge.net的一个VideoSourcePlayer控件之后找到NewFrame事件，代码如下：

下面是控件的一个事件，是真正录像的代码

private void videoSourcePlayer1_NewFrame(object sender, ref Bitmap image) { //录像 Graphics g = Graphics.FromImage(image); SolidBrush drawBrush = new SolidBrush(Color.Yellow); Font drawFont = new Font("Arial", 6, FontStyle.Bold, GraphicsUnit.Millimeter); int xPos = image.Width - (image.Width - 15); int yPos = 10; //写到屏幕上的时间 drawDate = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss"); g.DrawString(drawDate, drawFont, drawBrush, xPos, yPos); if (!Directory.Exists(videoPath)) Directory.CreateDirectory(videoPath); //创建文件路径 //fileFullPath = path + fileName; if (stopREC) { stopREC = true; createNewFile = true; //这里要设置为true表示要创建新文件 if (videoWriter != null) videoWriter.Close(); } else { //开始录像 if (createNewFile) { videoFileName = DateTime.Now.ToString("yyyy.MM.dd HH.mm.ss") + ".avi"; videoFileFullPath = videoPath + videoFileName; createNewFile = false; if (videoWriter != null) { videoWriter.Close(); videoWriter.Dispose(); } videoWriter = new VideoFileWriter(); //这里必须是全路径，否则会默认保存到程序运行根据录下了  videoWriter.Open(videoFileFullPath, image.Width, image.Height, frameRate, VideoCodec.MPEG4); videoWriter.WriteVideoFrame(image); } else { videoWriter.WriteVideoFrame(image); } } }

拍照代码

/// <summary> /// 手动拍照或抓图 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnCapture_Click(object sender, EventArgs e) { try { int number=0; number++; string fileImageName = g_s_RequestNo + "-" + number + ".bmp"; string fileCapturePath = g_s_AutoSavePath + g_s_RequestNo + "\\"; if (!Directory.Exists(fileCapturePath)) Directory.CreateDirectory(fileCapturePath); //抓到图保存到指定路径 Bitmap bmp = null; bmp = videoSourcePlayer1.GetCurrentVideoFrame(); if (bmp == null) { MessageBox.Show("捕获图像失败！", "提示"); return; } bmp.Save(fileCapturePath + fileImageName, ImageFormat.Bmp); } catch (Exception ex) { MessageBox.Show("捕获图像失败！" + ex.Message, "提示"); } }

最基本的工作就完成了，如果要更加完美的话还需要细化，优化等等，就先记录到此，以便记录自己的点点滴滴的进步