public static extern __CvVideoWriterPtr cvCreateVideoWriter([MarshalAs(UnmanagedType.LPStr)] string filename, int fourcc, double fps, __CvSize frame_size);
public static unsafe extern __IplImagePtr cvCreateImageHeader(__CvSize src, int depth, int channels);
public static extern __IplImagePtr cvCreateImage(__CvSize size, int depth, int channels);
public static extern __CvVideoWriterPtr cvCreateVideoWriter([MarshalAs(UnmanagedType.LPStr)]string filename, int fourcc, double fps, __CvSize frame_size);