After running subprocess.Popen or os.system or hardcoding the pi to take a picture, the code exits

Asked Jan 18 '18 at 15:49

Active Jan 18 '18 at 15:49

Viewed 336 times

Currently I am writing a script that will take a picture with a picam on my raspberry pi. But when I run my code it exits after I call the camera to take a picture. I have tried using

subprocess.Popen(['sudo', 'raspistill', '-w', '320', '-h', '240', '-hf', '-o',  '/home/pi/Documents/Python/robot1/image0.jpg'])

as well as

os.system('sudo raspistill -w 320 -h 240 -o /home/pi/Documents/Python/robot1/image0.jpg')

and

camera = PiCamera()
camera.start_preview()
sleep(2)
camera.capture('/home/pi/Documents/Python/robot1/image01.jpg')
camera.stop_preview()

but whenever either of these lines are run, my script exits. Does anybody know how to fix this?

asked Jan 18 '18 at 15:49

tteo57

1

Please post the error message. – Erik Cederstrand Jan 18 '18 at 15:55
can you try without "sudo" ? – Jean-François Fabre Jan 18 '18 at 16:01
@ErikCederstrand there is no error message, when I run the code in the terminal, the script just exits. – tteo57 Jan 18 '18 at 16:45
@Jean-FrançoisFabre no, because I am keyboard input to tell the camera to take a picture, I need to use sudo. – tteo57 Jan 18 '18 at 16:46
What's the return value of `os.system()`? Or stdout and stderr from the `Popen` call? What happens if you run the command directly from a terminal? Also, I assume the script writes the picture you have taken to `/home/pi/Documents/Python/robot1/image01.jpg`. Does that exist after the script exits? – Erik Cederstrand Jan 18 '18 at 16:57
you could use `sudo` to run your python script instead. – Jean-François Fabre Jan 18 '18 at 19:56

After running subprocess.Popen or os.system or hardcoding the pi to take a picture, the code exits

0 Answers0