I am trying to create a independent process to handle my image acquire from camera. But multiprocessing seems to have difficulty pickling videocapture module from opencv. Can anyone suggest a work around ? I am using python 3.7.1
from multiprocessing import Processimport multiprocessing as mpimport timeimport loggingimport logging.handlersimport sysimport loggingfrom enum import Enumimport cv2class Logger(): @property def logger(self): component = "{}.{}".format(type(self).__module__, type(self).__name__) #default log handler to dump output to console return logging.getLogger(component)class MyProcess(Logger): def __init__(self, ): self.process = Process(target = self.run, args=()) self.exit = mp.Event() self.logger.info("initialize class") self.capture = cv2.VideoCapture(0) def run(self): while not self.exit.is_set(): pass print("You exited!") def shutdown(self): print("Shutdown initiated") self.exit.set()if __name__ == "__main__": p = MyProcess() p.process.start() print( "Waiting for a while") time.sleep(3) p.shutdown() time.sleep(3) print("Child process state: {}".format(p.process.is_alive())) The return error specific said it videocapture object can't be pickled.
File "C:\Program Files (x86)\Microsoft Visual Studio\Shared\Anaconda3_64\lib\multiprocessing\reduction.py", line 60, in dump ForkingPickler(file, protocol).dump(obj)
TypeError: can't pickle cv2.VideoCapture objects
