网络摄像头代码中的内存泄漏

Question

好的,我一直在尝试通过网络摄像头做一些特定的视频.我有一个Lumenera Infinity 2显微镜,我试图从中提取饲料,并希望能够在进入时修改饲料.由于我找不到使用Video Source Player的方法,我决定改为拉动每个帧(相机的最大15fps)作为位图,以便我可以在那里进行修改.

问题是:我有一个巨大的内存泄漏.当我使用videoSourcePlayer运行视频时,它使用大约30兆的徘徊.当我将帧拉动为位图时,它会在几秒钟内打破1 gig的内存.

我错过了什么,这里？我认为自动垃圾收集会在旧框架无法访问时挖出旧框架.我应该尝试强制在位图上进行垃圾回收吗？或者它完全是另一回事,而且我还是错过了它.

FilterInfoCollection captureDevices;
VideoCaptureDevice cam;
Bitmap bitmap;

public Form1()
{
  InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{
  try
  {
    captureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);

    if (captureDevices.Count == 0)
      throw new ApplicationException();

    CameraSelectComboBox.Items.Clear();

    foreach (FilterInfo device in captureDevices)
    {
      CameraSelectComboBox.Items.Add(device.Name);
    }

    CameraSelectComboBox.SelectedIndex = 0;
    CameraSelectComboBox.Enabled = true;
  }
  catch (ApplicationException)
  {
    CameraSelectComboBox.Enabled = false;
  }
}

private void connectButton_Click(object sender, EventArgs e)
{
  cam = new VideoCaptureDevice(captureDevices[CameraSelectComboBox.SelectedIndex].MonikerString);
  cam.NewFrame -= Handle_New_Frame; //Just to avoid the possibility of a second event handler being put on
  cam.NewFrame += new AForge.Video.NewFrameEventHandler(Handle_New_Frame);
  videoSourcePlayer1.Visible = false;
  cam.Start();

  //videoPictureBox1.Visible = false;
  //videoSourcePlayer1.VideoSource = new VideoCaptureDevice(captureDevices[CameraSelectComboBox.SelectedIndex].MonikerString);
  //videoSourcePlayer1.Start();
}

private void Handle_New_Frame(object sender, NewFrameEventArgs eventArgs)
{
  bitmap = (Bitmap)eventArgs.Frame.Clone();

  videoPictureBox1.Image = bitmap;
}

Answer 1

尝试这个：

private void Handle_New_Frame(object sender, NewFrameEventArgs eventArgs)
{
    if(bitmap != null)
        bitmap.Dispose();
    bitmap = new Bitmap(eventArgs.Frame);

    if(videoPictureBox1.Image != null)
        this.Invoke(new MethodInvoker(delegate() {videoPictureBox1.Image.Dispose();}));
    videoPictureBox1.Image = bitmap;
}

它解决了我在 Aforge 和 PictureBoxes 中遇到的一些内存泄漏问题，但 VideoSourcePlayer 在内存消耗方面要好得多。