title: Run OpenCV script on start with imshow
body: <p>I have an OpenCV/python script running at my Raspberry Pi which reads the camera and shows the stream on the RCA monitor connected to the Pi.</p>
  
  <p>Now I want the script to be loaded on boot. I already tried a cronjob @reboot, the /etc/rc.locale, /etc/profile and ~/.bash_profile.</p>
  
  <p>I see the red light of the camera turning on every time, but the image won't be shown. Is there any solution to run the script? (I have no external input devices connected)</p>
  
  <p>Thank you!</p>