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I try to execute a python2 script which is supposed to display a movie file.

When I execute this code with VNC it works, I can see the movie being played (eventhough the fps is limitted around 2...)

while True:
    ret,frame = cap.read()
    cv2.imshow('frame',frame)
    if cv2.waitKey(1) & 0xFF ==ord('q'):
        break

But when I execute the same script from a Putty SSH console I got the error message :

(frame:964): Gtk-WARNING **: cannot open display:

After a bit of searching over the internet I tried the command:

export DISPLAY=:0.0

Then it works the same way as if it was launched trough VNC (2fps) eventhough is supposed to play the clip really fast !

Should I try without enabling the VNC server for getting the video played at the desired speed?

Do you have any tips/direction where to get answer from ?

When I try the same script on my laptop it works like a charm.

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