static PyObject *
startVideoMode(PyObject *self, PyObject *args)
{
    printf("Start the video mode\n");
    CHECK_DBR();

    PyObject *callback = NULL;
    int maxListLength, maxResultListLength, width, height, imageformat, iFormat, stride;
    if (!PyArg_ParseTuple(args, "iiiiiiO", &maxListLength, &maxResultListLength, &width, &height, &imageformat, &iFormat, &callback)) {
        return NULL;
    }

    updateFormat(iFormat);

    if (!PyCallable_Check(callback))
    {
        PyErr_SetString(PyExc_TypeError, "parameter must be callable");
        return NULL;
    }
    else
    {
        Py_XINCREF(callback);         /* Add a reference to new callback */
        Py_XDECREF(py_callback);      /* Dispose of previous callback */
        py_callback = callback;
    }

    ImagePixelFormat format = IPF_RGB_888;

    if (imageformat == 0)
    {
        stride = width;
        format = IPF_GRAYSCALED;
    }
    else {
        stride = width * 3;
        format = IPF_RGB_888;
    }

    DBR_SetTextResultCallback(hBarcode, onResultCallback, NULL);

    int ret = DBR_StartFrameDecoding(hBarcode, maxListLength, maxResultListLength, width, height, stride, format, "");
    return Py_BuildValue("i", ret);
}