使用Aforge.net对屏幕进行截图，并将每一张BITMAP写到AVI文件中。超级简单！

AFORGE.NET的ScreenCaptureStream性能有限，目前测试基本能达到10帧左右。

设置AVIWriter的FrameRate为8帧，但是播放起来像快进一样，目前还没有找到原因。暂时采取一个New Frame到达时，，多写几次的方法进行规避。

有知道如何处理的请联系我。

详细代码如下：

public partial class Form1 : Form { Screen c = Screen.PrimaryScreen; AVIWriter write; /// <summary> /// 截屏实例 /// </summary> ScreenCaptureStream cap; Pen p = new Pen(Brushes.Red, 5); Pen p2 = new Pen(Brushes.Green, 5); bool isStart = false; public Form1() { InitializeComponent(); } void cap_NewFrame(object sender, NewFrameEventArgs eventArgs) { Debug.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff")); int x = Control.MousePosition.X; int y = Control.MousePosition.Y; using (Graphics g = Graphics.FromImage(eventArgs.Frame)) { //画时间 g.DrawString(DateTime.Now.ToString(), new Font("宋体", 14f, FontStyle.Bold), Brushes.Red, new PointF(100, 100)); //画鼠标位置 g.DrawEllipse(p, new Rectangle(x - 10, y - 10, 20, 20)); } if (Control.MouseButtons == MouseButtons.Left) { //鼠标左键点击时，绘制点击图像 Bitmap bt_re = (Bitmap)eventArgs.Frame.Clone(); using (Graphics g = Graphics.FromImage(bt_re)) { g.SmoothingMode = SmoothingMode.HighSpeed; g.DrawEllipse(p2, new Rectangle(x - 20, y - 20, 40, 40)); } write.AddFrame(eventArgs.Frame); write.AddFrame(bt_re); write.AddFrame(bt_re); write.AddFrame(eventArgs.Frame); } else { write.AddFrame(eventArgs.Frame); } //多写一次，如果不多写，感觉播放像在快进。前面设置了帧速率也没什么用。有知道的高手请回答。 write.AddFrame(eventArgs.Frame); } private void Form1_Load(object sender, EventArgs e) { button2.Enabled = false; p.StartCap = LineCap.Round; p.EndCap = LineCap.Round; p2.StartCap = LineCap.Round; p2.EndCap = LineCap.Round; } private void button1_Click(object sender, EventArgs e) { isStart = true; cap = new ScreenCaptureStream(c.Bounds,125); cap.NewFrame += new NewFrameEventHandler(cap_NewFrame); string filename=DateTime.Now.ToString()+"avi"; SaveFileDialog sf = new SaveFileDialog(); sf.Filter = "视频文件|*.avi"; if (sf.ShowDialog() == DialogResult.OK) { filename = sf.FileName; write = new AVIWriter(); write.Open(filename, c.Bounds.Width, c.Bounds.Height); write.FrameRate = 8; cap.Start(); } button1.Enabled = false; button2.Enabled = true; } private void button2_Click(object sender, EventArgs e) { //多等1s记录画面 Thread.Sleep(1000); cap.Stop(); write.Close(); write.Dispose(); button1.Enabled = true; button2.Enabled = false; } }