PI 카메라 프로그램 (Thread)

PI 카메라 프로그램 (Thread) 
 # import the necessary packages
from picamera.array import PiRGBArray
from picamera import PiCamera
import cv2
import threading
import time
import logging
import os

logger = logging.getLogger(__name__)
archive_path = os.path.join(os.path.dirname(os.path.realpath(__file__)), 'archive')

thread = None
status = False

# Set up camera constants
#IM_WIDTH = 1024
#IM_HEIGHT = 768
IM_WIDTH = 640
IM_HEIGHT = 480

class PiWebCamera:
 def __init__(self,fps=20):
 logger.info(f"Initializing pi camera class with {fps} fps ")
 self.fps = fps
 self.camera = PiCamera(framerate=24)
 self.camera.resolution = (IM_WIDTH,IM_HEIGHT)
 # self.camera.rotation = 180 
 self.rawCapture = PiRGBArray(self.camera, size=(IM_WIDTH,IM_HEIGHT))
 self.rawCapture.truncate(0)
 self.max_frames = 5*self.fps
 self.frames = []
 self.isrunning = False
 
 def run(self):
 logging.debug("Perparing Pi Camera thread")
 global thread
 if thread is None:
 logging.debug("Creating PI thread")
 thread = threading.Thread(target=self._capture_loop,daemon=True)
 logger.debug("Starting PI thread")
 self.isrunning = True
 thread.start()
 logger.info("Thread PI started")

 def _capture_loop(self):
 global status
 dt = 1/self.fps
 logger.debug("Observation started")
 while self.isrunning:
 if(status):
 self.camera.capture(self.rawCapture, format="bgr", use_video_port=True)
 self.rawCapture.truncate(0)
 image = self.rawCapture.array
 if len(self.frames)==self.max_frames:
 self.frames = self.frames[1:]
 self.frames.append(image)
 time.sleep(dt)
 logger.info("Thread stopped successfully")

 def status(self):
 global status
 logger.debug("Status isrunning" + str(status))
 if(status):
 content = "STOP THREAD !"
 status = False
 else:
 content = "START THREAD !"
 status = True
 return content

 
 def get_frame(self, _bytes=True):
 if len(self.frames)>0:
 if _bytes:
 img = cv2.imencode('.png',self.frames[-1])[1].tobytes()
 else:
 img = self.frames[-1]
 else:
 with open(archive_path+"/not_found.jpeg","rb") as f:
 img = f.read()
 return img