Problem with threads

Hi, thanks a bunch for your effort with this project! I have modified camera_class.py to read frames from a mjpeg stream instead of a raspi cam. Everything seems to be working just fine (detecting cats etc.) up until a thread is supposed to be started to send a message to the telegram bot, then I get this:

NO CAT FOUND!
CLEARED QUEQUE BECAUSE EVENT OVER WITHOUT CONCLUSION...
CatCamPy: C:\Users\englund\Documents\GitHub
Traceback (most recent call last):
  File ".\cascade.py", line 743, in <module>
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    sq_cascade.queque_handler()
  File ".\cascade.py", line 341, in queque_handler
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 116, in spawn_main
    exitcode = _main(fd, parent_sentinel)
    self.queque_worker()
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\spawn.py", line 126, in _main
  File ".\cascade.py", line 303, in queque_worker
    self = reduction.pickle.load(from_parent)
EOFError: Ran out of input
    p.start()
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\process.py", line 121, in start
    self._popen = self._Popen(self)
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 224, in _Popen
    return _default_context.get_context().Process._Popen(process_obj)
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\context.py", line 327, in _Popen
    return Popen(process_obj)
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\popen_spawn_win32.py", line 93, in __init__
    reduction.dump(process_obj, to_child)
  File "C:\Users\englund\AppData\Local\Programs\Python\Python38\lib\multiprocessing\reduction.py", line 60, in dump
    ForkingPickler(file, protocol).dump(obj)
TypeError: cannot pickle '_thread.RLock' object

Any thoughts on why this is happening and how to fix it would be very appreciated!

The new camera class looks like this:

class Camera:
    def __init__(self,):
        time.sleep(2)

    def fill_queue(self, deque):
        while(1):
            gc.collect()
            i = 0
            stream = urllib.request.urlopen('http://localhost:8000/camera/mjpeg')
            bytes = b''
            while True:
                bytes += stream.read(1024)
                a = bytes.find(b'\xff\xd8') # JPEG start
                b = bytes.find(b'\xff\xd9') # JPEG end
                if a!=-1 and b!=-1:
                    jpg = bytes[a:b+2] # actual image
                    bytes= bytes[b+2:] # other informations
                    image = cv2.imdecode(np.fromstring(jpg, dtype=np.uint8),cv2.IMREAD_COLOR) 
                    deque.append(
                        (datetime.now(pytz.timezone('Europe/Zurich')).strftime("%Y_%m_%d_%H-%M-%S.%f"), image))
                    #deque.pop()
                    print("Quelength: " + str(len(deque)) + "\tStreamsize: " + str(sys.getsizeof(stream)))
                    i += 1

                if i == 60:
                    print("Loop ended, starting over.")
                    stream.close()
                    break

[larsenglund]

Removing old images from the queue made everything work! Thanks for your help! Now I can proceed to make the actual hardware installation, looking forward to not being woken up at 3 by the cats playing with prey under the bed >_<

[larsenglund]

Thanks for the quick reply! I’ll start by spinning up a virtual machine with linux then to eliminate that possible error source!