OpenCV Python cv2.perspectiveTransform

Question

I'm currently trying to video stabilization using OpenCV and Python. I use the following function to calculate rotation:

def accumulate_rotation(src, theta_x, theta_y, theta_z, timestamps, prev, current, f, gyro_delay=None, gyro_drift=None, shutter_duration=None):
    if prev == current:
        return src

    pts = []
    pts_transformed = []
    for x in range(10):
        current_row = []
        current_row_transformed = []
        pixel_x = x * (src.shape[1] / 10)
        for y in range(10):
            pixel_y = y * (src.shape[0] / 10)
            current_row.append([pixel_x, pixel_y])

            if shutter_duration:
                y_timestamp = current + shutter_duration * (pixel_y - src.shape[0] / 2)
            else:
                y_timestamp = current

            transform = getAccumulatedRotation(src.shape[1], src.shape[0], theta_x, theta_y, theta_z, timestamps, prev,
                                               current, f, gyro_delay, gyro_drift)

            output = cv2.perspectiveTransform(np.array([[pixel_x, pixel_y]], dtype="float32"), transform)
            current_row_transformed.append(output)

        pts.append(current_row)
        pts_transformed.append(current_row_transformed)

    o = utilities.meshwarp(src, pts_transformed)
    return o

I get the following error when it gets to output = cv2.perspectiveTransform(np.array([[pixel_x, pixel_y]], dtype="float32"), transform):

cv2.error: /Users/travis/build/skvark/opencv-python/opencv/modules/core/src/matmul.cpp:2271: error: (-215) scn + 1 == m.cols in function perspectiveTransform

Any help or suggestions would really be appreciated.