Rpi MJPG-streamer to ubuntu python opencv import

I have OpenCV 3.1 installed with ffmpeg and gstreamer enabled, all compiled from source with appropriate libs.
Plenty of pages out there to show you how to piece that together ;)

I used this to set up my usb c270 logitech webcam omn the Raspberry pi to stream mjpeg to my ubuntu 16.04 box.
(Works!)
https://iotalot.com/2016/05/28/video-streaming-using-raspberry-pi-3-and-usb-webcam/

On the Ubuntu side I catch (receive) the stream in OpenCV with the following Python code:

Python 2 Opencv 3.1 Ubuntu 16.04 mjpeg_streamer cam receiver:
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import numpy as np
import cv2

cap = cv2.VideoCapture('http://192.168.2.62:9090/?action=stream')

while(cap.isOpened()):
    ret, frame = cap.read()

    #gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)

    cv2.imshow('frame',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

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