Raspberry Pi Forums

Posted: **Sat Feb 29, 2020 1:06 am**

I'm having trouble getting my picamera to save a photo filename as a timestamp (Year/Month/Day/Hour/Minute/Second/and possibly millisecond).
My code in its entirety so far:

Code: Select all

import RPi.GPIO as GPIO
from time import sleep
from picamera import PiCamera
import datetime
import time

camera = PiCamera()
timestamp = datetime.datetime.now().strftime("%m%d%Y%H%M%S")

GPIO.setmode(GPIO.BOARD)
GPIO.setup(16, GPIO.IN)

while (1):

    if GPIO.input(16) == True:
        camera.start_preview()
        for i in range(3):

            camera.capture_continuous('/home/pi/Desktop/VehiclePics/(+timestamp+).jpg' % i)

        camera.stop_preview()

    elif GPIO.input(16) == 0:
        pass

but I keep getting this error message:

Traceback (most recent call last):
File "/home/pi/new.py", line 22, in <module>
camera.capture_continuous('/home/pi/Desktop/VehiclePics/(+timestamp+).jpg' % i)
TypeError: not all arguments converted during string formatting

Any help would be much appreciated!

Posted: **Sat Feb 29, 2020 9:20 am**

try

Code: Select all

camera.capture_continuous('/home/pi/Desktop/VehiclePics/' + timestamp + '.jpg' % i)

Posted: **Sat Feb 29, 2020 9:25 am**

gordon77 wrote: ↑
Sat Feb 29, 2020 9:20 am
try
Code: Select all
camera.capture_continuous('/home/pi/Desktop/VehiclePics/' + timestamp + '.jpg' % i)

Doesn't it need a placeholder for 'i' too?

Posted: **Sat Feb 29, 2020 10:12 am**

Maybe.

I don't think it will work as it is just calling capture_continuous several times.

maybe try..

Code: Select all

import RPi.GPIO as GPIO
from time import sleep
from picamera import PiCamera
import datetime
import time

camera = PiCamera()

GPIO.setmode(GPIO.BOARD)
GPIO.setup(16, GPIO.IN, pull_up_down=GPIO.PUD_DOWN)

while True:
    if GPIO.input(16) == True:
        camera.start_preview()
        timestamp = datetime.datetime.now().strftime("%m%d%Y%H%M%S")
        for i in range(3):
            camera.capture('/home/pi/Desktop/VehiclePics/' + timestamp + '_' + str(i) + '.jpg')
        camera.stop_preview()

Posted: **Sat Feb 29, 2020 10:31 pm**

Thanks gordon77!

That worked great. I have been trying to attack this for weeks now!

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