Pornodance with openCV and mathcad possibility tu create user DLL. I don't know, how to compile it in windows.

video2mathcad.cpp

#include "MCADINCL.H"
#include <opencv2/highgui/highgui.hpp>
#include <opencv2/imgproc/imgproc.hpp>

// Reading frame and convert it into MathCad matrix(complexarray).
//
LRESULT video2MathCad(COMPLEXARRAY * const result, const char * path_to_video,
                      const int frame_number)
  {
    CvCapture* capture = cvCreateFileCapture(path_to_video);
    cvSetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES, frame_number);
    IplImage* frame = cvQueryFrame(capture);
    char* data = frame->imageData;

    // Allocate memory for MathCad matrix. Built-in MathCad method.
    //
    MathcadArrayAllocate(result, frame->width, frame->height, true, false);

    for(int i = 0; i < frame->width; i++)
      for(int j = 0; j < frame->height; j++) {
          result->hReal[i][j] = data[i * frame->height + j];
        }

    return 0;
  }

FUNCTIONINFO frame = { frame, "path_to_video, frame_number",
                       (LPCFUNCTION)video2MathCad; COMPLEX_ARRAY, 2,
                       { char*, int } };

bool WINAPI DllEntryPoint (HISTANCE hDLL, DWORD dwReason, LPVOID lpreserved)
  {
    CreateUserFunction(hDLL, &frame);
    return true;
  }