USB 카메라 프로그램 (Thread)

USB 카메라 프로그램 (Thread) 
 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 = True

class UsbWebCamera:

 def __init__(self,fps=20,video_source=0):
 logger.info("Initializing usb camera class with {fps} " + str(fps) + " and video_source={" + str(video_source) + "}")
 self.fps = fps
 self.video_source = video_source
 self.camera = cv2.VideoCapture(self.video_source)

 self.camera.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
 self.camera.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
 
 self.max_frames = 5*self.fps
 self.frames = []
 self.isrunning = False
 
 def run(self):
 logging.debug("Perparing Usb Camera thread")
 global thread
 if thread is None:
 logging.debug("Creating thread")
 thread = threading.Thread(target=self._capture_loop,daemon=True)
 logger.debug("Starting thread")
 self.isrunning = True
 thread.start()
 logger.info("Thread started")

 def _capture_loop(self):
 global status
 dt = 1/self.fps
 logger.debug("Observation started")
 while self.isrunning:
 if(status):
 v,im = self.camera.read()
 im = cv2.flip(im, 1)
 #im = cv2.flip(im, 0)
 if v:
 if len(self.frames)==self.max_frames:
 self.frames = self.frames[1:]
 self.frames.append(im)
 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:
 logger.info("Change cam source 1")
 self.video_source = 1
 self.camera = cv2.VideoCapture(self.video_source)
 self.camera.set(cv2.CAP_PROP_FRAME_WIDTH, 640)
 self.camera.set(cv2.CAP_PROP_FRAME_HEIGHT, 480)
 with open(archive_path+"/not_found.jpeg","rb") as f:
 img = f.read()
 return img