I'd like to capture an image at a specified shutter speed and ISO, and write it to disk. I thought that'd be pretty straightforward but... apparently not? In searching, I found people complaining of the same thing 2 years ago but no answers... I guess I'm hoping something has changed.
import picamera import time from fractions import Fraction start = time.time() print "Initializing...", camera = picamera.PiCamera() camera.resolution = (2592,1944) camera.awb_mode = 'sunlight' camera.framerate = Fraction(1,15) camera.exposure_mode = 'off' camera.iso = 800 camera.shutter_speed = 6000000 print "Done! ", stop = time.time() print (stop-start), "seconds" for i in range(0,10): start = time.time() print "capturing...", camera.capture('image.jpg', format='jpeg', quality=100) print "done ", stop = time.time() print (stop-start), "seconds"
Initialization takes 0.59 seconds, fine no problem
First image takes 37.44 seconds
The rest take 24.9 seconds each
I'm fine with a bit of overhead, but the overhead is 3 times as long as the actual exposure! Any way around this? Or even an explanation of what's happening for the half-minute it's not taking the picture?