使用EmguCV导入视频时输入TypeInitializationException

时间:2015-12-08 17:53:58

标签: c# exception video exception-handling emgucv

我正在开发一个项目,我希望用户能够导入视频。每当我选择要导入的视频时,public class CvString : UnmanagedObject都会给我一个System.TypeInitializationException错误。这不依赖于数据类型,它不适用于.jpeg.png等图片,也不适用于我尝试的任何视频格式(.avi``.mp4``.wmp)< / p>

这是我要加载和显示视频的片段(自己编写的代码)

OpenFileDialog ofd = new OpenFileDialog();
Capture _capture;
Timer My_Time = new Timer();
int FPS = 30;
public Form1()
{
    InitializeComponent();
    //Frame Rate
    My_Time.Interval = 1000 / FPS;
    My_Time.Tick += new EventHandler(timer1_Tick);
    My_Time.Start();

    _capture = new Capture("20151102_110553.mp4");

}

private void timer1_Tick(object sender, EventArgs e)
{
    imageBox1.Image = _capture.QueryFrame();
}


private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
{
    _capture = new Capture(openFileDialog1.FileName.ToString());
}

private void button2_Click(object sender, EventArgs e)//Import-Button
{
     openFileDialog1.ShowDialog();
}

这里是抛出异常的方法(来自Emgu.CV的代码)

namespace Emgu.CV
{
   public class CvString : UnmanagedObject
   { 
        private bool _needDispose;

        internal CvString(IntPtr ptr, bool needDispose)
        {
             _ptr = ptr;
             _needDispose = needDispose;
        }

        public CvString(String s)
        {
        if (s == null)
            {
                _ptr = CvInvoke.cveStringCreate();
            }
        else
        {
            byte[] bytes = Encoding.UTF8.GetBytes(s);
            Array.Resize(ref bytes, bytes.Length + 1);
            bytes[bytes.Length - 1] = 0; //The end of string '\0' character
            GCHandle handle = GCHandle.Alloc(bytes, GCHandleType.Pinned);
            _ptr =CvInvoke.cveStringCreateFromStr(handle.AddrOfPinnedObject());
            // ^ Exception is thrown ^
            handle.Free();
        }

        _needDispose = true;
    }

我已经尝试将视频或图片导入到我的项目中,在启动项目时直接导入它,或者在运行时使用OpenFileDialog选择文件,但结果相同。只要我选择一个文件并想将其加载到我的项目中,就会抛出异常。

编辑:添加了堆栈跟踪

堆栈跟踪

No suitable directory found to load unmanaged modules
Exception thrown : "System.DllNotFoundException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Thread 0xa64 ended with Code 0 (0x0).
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll
Exception thrown : "System.TypeInitializationException" in Emgu.CV.dll

1 个答案:

答案 0 :(得分:1)

我曾经遇到过同样的问题,我不知道它是否对你有帮助,但是试试看。

只需将cvexternmsvcp120msvcr120opencv_ffmpeg300_64 dll拖放到项目中即可。它们应位于emgu...\bin\x64\

这应该可以解决您的DllNotFoundException,也可能是其他问题。