System.AccessViolationException in Emgu.CV.dll

Question

I am trying to capture a video from a file using

captureFrame = new Capture(FileName);

The program works fine with .mpg images, but when I want to capture video from a .mp4 file, I get the following error:

An unhandled exception of type "System.AccessViolationException" occurred in Emgu.CV.dll

Additional Information: Attempted to read or write protected memory. This often indicates that another memory is corrupt.

It is strange that this error occurs only occasionally. For a while, the program works fine, and then this error occurs.

Do you have any ideas?

Thanks B