基于运动从网络摄像机录制。 wpf使用aforge

Question

我已经做了一个简单的程序，显示来自摄像头的视频，并可以检测来自饲料的运动，但我有一个问题，了解如何在检测到运动时从网络摄像头进行记录。我在Aforge.Net网站上搜索过，但我发现很难理解我需要做什么。当检测到动作时，我想开始记录到预先确定的目的地，并且当没有检测到动作时，我想要继续记录一段时间，然后停止。这是我迄今为止的计划的一部分...

请你帮忙解释一下，如果我需要提供更多信息或代码，请告诉我。由于

$ //打开视频源

private void OpenVideoSource(IVideoSource source) 
    { 
     // set busy cursor 
     //this.Cursor = Cursors.WaitCursor; 

     // close previous video source 
     CloseVideoSource(); 

     //motionDetectionType = 1; 
     //SetMotionDetectionAlgorithm(new TwoFramesDifferenceDetector()); 
     //motionProcessingType = 1; 
     //SetMotionProcessingAlgorithm(new MotionAreaHighlighting()); 

     // start new video source 
     videoSourcePlayer.VideoSource = new AsyncVideoSource(source); 


     videoSourcePlayer.NewFrame +=new VideoSourcePlayer.NewFrameHandler(videoSourcePlayer_NewFrame); 
     //videoSourcePlayer.DesiredFrameRate = 30; 
     //webcam's default frame rate will be used instead of above code that has an error 


     // create new video file 
     writer.Open("test.avi", width, height, 25, VideoCodec.MPEG4); 
     // create a bitmap to save into the video file 
     Bitmap image = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format24bppRgb); 
     // write 1000 video frames 
     for (int i = 0; i < 1000; i++) 
     { 
      image.SetPixel(i % width, i % height, System.Drawing.Color.Red); 
      writer.WriteVideoFrame(image); 
     } 
     writer.Close(); 



     try 
     { 
      videoSourcePlayer.Start(); 
      //motionAlarmLevel = sldMotionSensitivity.Value/100; 
     } 

     catch (Exception x) 
     { 
      System.Windows.MessageBox.Show(x.ToString()); 
     } 
     //videoSource.DesiredFrameSize = new System.Drawing.Size(800,600); 
     videoSourcePlayer.BorderColor = System.Drawing.Color.Blue; 
     // reset statistics 
     statIndex = statReady = 0; 

     // start timers 
     clock.Start(); 
     //alarm.Start(); 

     videoSource = source; 

     //this.Cursor = Cursors.Default; 
    } 

    // Close current video source 
    private void CloseVideoSource() 
    { 
     // set busy cursor 
     //this.Cursor = Cursors.WaitCursor; 

     // stop current video source 
     videoSourcePlayer.SignalToStop(); 

     // wait 2 seconds until camera stops 
     for (int i = 0; (i < 50) && (videoSourcePlayer.IsRunning); i++) 
     { 
      Thread.Sleep(100); 
     } 
     if (videoSourcePlayer.IsRunning) 
      videoSourcePlayer.Stop(); 

     // stop timers 
     clock.Stop(); 
     //alarm.Stop(); 

     motionHistory.Clear(); 

     // reset motion detector 
     if (detector != null) 
      detector.Reset(); 

     //videoSourcePlayer.BorderColor = System.Drawing.Color.Red; 
     //this.Cursor = Cursors.Default; 
    } 

    // New frame received by the player 
    void videoSourcePlayer_NewFrame(object sender, ref Bitmap image) 
    { 

     lock (this) 
     { 
      if (detector != null) 
      { 
       //motion detected 
       if (detector.ProcessFrame(image) > motionAlarmLevel) 
       { 
        //float motionLevel = detector.ProcessFrame(image); 
        videoSourcePlayer.BorderColor = System.Drawing.Color.Red; 
        Dispatcher.BeginInvoke(new ThreadStart(delegate { lblMotionDetected.Content = "Motion Detected"; })); 
        //lblMotionDetected.Content = "Motion Detected"; 
        //flash = (int)(2 * (1000/alarm.Interval)); 
       } 

       // no motion detected 
       if (detector.ProcessFrame(image) < motionAlarmLevel) 
       { 
        videoSourcePlayer.BorderColor = System.Drawing.Color.Black; 
        Dispatcher.BeginInvoke(new ThreadStart(delegate { lblMotionDetected.Content = "No Motion Detected"; })); 
       } 


       // if (motionLevel > motionAlarmLevel) 
       // { 
       //  // flash for 2 seconds 
       //  timer.Start(); 
       // } 

      } 
     } 
    } 

Answer 1

有一个称为ISPY一个开源项目 - http://www.ispyconnect.com这正是这么做的。源可供下载。