Emgu AccessViolationException在從Emgu 2升級到Emgu後隨機發生3.1.0.1

Question

我使用的是Emgu 2（使用opencv 2.4.10.1的那個），並且運行非常穩定，並且可以在不崩潰的情況下運行。我現在已經升級到Emgu 3.1.0.1，並且我的應用程序有時會在幾個小時或一天內崩潰並導致AccessViolationException。我已經看到它現在在兩個不同的地點墜毀。請參閱下面源代碼中標記的兩個位置（CRASH1 & CRASH2）。所以我認爲這裏有一些根本性的錯誤。

我正在運行軟件的發佈版本。任何人有什麼想法可能會發生在這裏？

的CRASH1例外是：

Framework Version: v4.0.30319 
Description: The process was terminated due to an unhandled exception. 
Exception Info: System.AccessViolationException 
    at Emgu.CV.CvInvoke.cveSubtract(IntPtr, IntPtr, IntPtr, IntPtr, Emgu.CV.CvEnum.DepthType) 
    at Emgu.CV.CvInvoke.Subtract(Emgu.CV.IInputArray, Emgu.CV.IInputArray, Emgu.CV.IOutputArray, Emgu.CV.IInputArray, Emgu.CV.CvEnum.DepthType) 
    at Emgu.CV.RotationMatrix2D.CreateRotationMatrix(System.Drawing.PointF, Double, System.Drawing.Size, System.Drawing.Size ByRef) 
    at Emgu.CV.Image`2[[Emgu.CV.Structure.Bgr, Emgu.CV.World, Version=3.1.0.2282, Culture=neutral, PublicKeyToken=7281126722ab4438],[System.Byte, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Rotate(Double, System.Drawing.PointF, Emgu.CV.CvEnum.Inter, Emgu.CV.Structure.Bgr, Boolean) 
    at Emgu.CV.Image`2[[Emgu.CV.Structure.Bgr, Emgu.CV.World, Version=3.1.0.2282, Culture=neutral, PublicKeyToken=7281126722ab4438],[System.Byte, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]].Rotate(Double, Emgu.CV.Structure.Bgr, Boolean) 
    at XXXX.ProcessFrames() 
    at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 
    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 
    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) 
    at System.Threading.ThreadHelper.ThreadStart() 

的CRASH2例外是：

Framework Version: v4.0.30319 
Description: The process was terminated due to an unhandled exception. 
Exception Info: System.AccessViolationException 
    at Emgu.CV.Util.VectorOfMat.VectorOfMatPush(IntPtr, IntPtr) 
    at Emgu.CV.Util.VectorOfMat..ctor(Emgu.CV.Mat[]) 
    at XXXX.ProcessFrames() 
    at System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 
    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean) 
    at System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object) 
    at System.Threading.ThreadHelper.ThreadStart() 

的源代碼是：

public void start() 
    { 
     started = true; 
     // start processing camera frames 
     cameraThread = new Thread(new ThreadStart(ProcessFrames)); 
     cameraThread.IsBackground = true; 
     cameraThread.Start(); 
    } 

    private void ProcessFrames() 
    { 
     Bgr frameBg = new Bgr(0,0,0); 
     while (true) 
     { 
      // try to open the camera device 
      if (capture == null) 
      { 
       try 
       { 
        int index; 
        bool isNumeric = int.TryParse(ConfigurationManager.AppSettings["CameraSource"], out index); 
        capture = isNumeric ? new Capture(index) : new Capture(ConfigurationManager.AppSettings["CameraSource"]); 
        capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameWidth, 640); 
        capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FrameHeight, 480); 
        capture.SetCaptureProperty(Emgu.CV.CvEnum.CapProp.FourCC, Emgu.CV.VideoWriter.Fourcc('M', 'J', 'P', 'G')); 
       } 
       catch 
       { 
        frameObservers.ForEach(a => a.frame(cameraNotConnectedBitmap, new List<Person>(), recognizer.isActive())); 
       } 
       Task.Delay(1000).Wait(); 
       continue; 
      } 

      // read a frame from the camera 
      Mat matFrame = capture.QueryFrame(); 
      Image<Bgr, byte> frame = null; 
      if (matFrame != null) 
      { 
       frame = matFrame.ToImage<Bgr, byte>(); 
      } 
      if (frame == null) 
      { 
       frameObservers.ForEach(a => a.frame(cameraNotConnectedBitmap, new List<Person>(), recognizer.isActive())); 
       capture = null; // force to reconnect to camera again 
       Task.Delay(1000).Wait(); 
       continue; 
      } 

      try 
      { 
       CRASH1 >>>frame = frame.Rotate(Convert.ToInt32(ConfigurationManager.AppSettings["CameraRotation"]), frameBg, false); 
       double scale = Convert.ToDouble(ConfigurationManager.AppSettings["CameraScale"]); 
       if (scale > 0) 
       { 
        frame = frame.Resize(scale, Emgu.CV.CvEnum.Inter.Linear); 
       } 

       Global.FRAME_HEIGHT = frame.Height; 
       Global.FRAME_WIDTH = frame.Width; 
       rawCameraFeedFrameObservers.ForEach(a => a.frame(frame)); 

       if (autoBrightness) 
       { 
        Image<Lab, Byte> lab = frame.Convert<Lab, Byte>(); 
        Image<Gray, Byte>[] planes = lab.Split(); 
        CvInvoke.CLAHE(planes[0], claheClipLimit, new Size(8, 8), planes[0]); 
        CRASH2 >>>VectorOfMat vm = new VectorOfMat(planes[0].Mat, planes[1].Mat, planes[2].Mat); 
        CvInvoke.Merge(vm, lab); 
        frame = lab.Convert<Bgr, Byte>(); 
       } 
      } 
      catch 
      { 
       // not the end of the world 
       Log.INFO("INFO", "Processing the frame failed, skipping this frame"); 
       continue; 
      } 
     } 
    } 

Answer 1

也許一個線程將訪問系統設備，而初始化由另一個併發線程完成...

由於兩個Crash1 & Crash2例外表演這一行

at System.Threading.ThreadHelper.ThreadStart() 

你嘗試直接趕上例外的cameraThread.Start()？

public void start() 
{ 
    started = true; 
    // start processing camera frames 
    cameraThread = new Thread(new ThreadStart(ProcessFrames)); 
    cameraThread.IsBackground = true; 
    try 
    { 
     cameraThread.Start(); 
    } 
    catch 
    { 
     started = false; 
     /* HERE ACCESS VIOLATION APPEAR, SO DELAY */ 
     Task.Delay(1000).Wait(); 
     /* AND RETRY */ 
    } 
    continue; 
}