def __init__(self,
src=0,
usePiCamera=False,
resolution=(320, 240),
framerate=32):
# check to see if the picamera module should be used
if usePiCamera:
# only import the picamera packages unless we are
# explicity told to do so -- this helps remove the
# requirement of `picamera[array]` from desktops or
# laptops that still want to use the `imutils` package
from video.streams.pivideostream import PiVideoStream
# initialize the picamera stream and allow the camera
# sensor to warmup
self.stream = PiVideoStream(resolution=resolution,
framerate=framerate)
# otherwise, we are using OpenCV so initialize the webcam
# stream
else:
self.stream = WebcamVideoStream(src=src)
