mirror of
https://github.com/blakeblackshear/frigate.git
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47 lines
2.2 KiB
Python
47 lines
2.2 KiB
Python
import json
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import cv2
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import threading
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import prctl
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from collections import Counter, defaultdict
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import itertools
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class MqttObjectPublisher(threading.Thread):
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def __init__(self, client, topic_prefix, camera):
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threading.Thread.__init__(self)
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self.client = client
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self.topic_prefix = topic_prefix
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self.camera = camera
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def run(self):
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prctl.set_name(self.__class__.__name__)
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current_object_status = defaultdict(lambda: 'OFF')
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while True:
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# wait until objects have been tracked
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with self.camera.objects_tracked:
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self.camera.objects_tracked.wait()
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# count objects with more than 2 entries in history by type
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obj_counter = Counter()
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for obj in self.camera.object_tracker.tracked_objects.values():
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if len(obj['history']) > 1:
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obj_counter[obj['name']] += 1
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# report on detected objects
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for obj_name, count in obj_counter.items():
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new_status = 'ON' if count > 0 else 'OFF'
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if new_status != current_object_status[obj_name]:
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current_object_status[obj_name] = new_status
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self.client.publish(self.topic_prefix+'/'+obj_name, new_status, retain=False)
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# send the snapshot over mqtt if we have it as well
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if obj_name in self.camera.best_frames.best_frames:
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best_frame = cv2.cvtColor(self.camera.best_frames.best_frames[obj_name], cv2.COLOR_RGB2BGR)
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ret, jpg = cv2.imencode('.jpg', best_frame)
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if ret:
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jpg_bytes = jpg.tobytes()
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self.client.publish(self.topic_prefix+'/'+obj_name+'/snapshot', jpg_bytes, retain=True)
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# expire any objects that are ON and no longer detected
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expired_objects = [obj_name for obj_name, status in current_object_status.items() if status == 'ON' and not obj_name in obj_counter]
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for obj_name in expired_objects:
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current_object_status[obj_name] = 'OFF'
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self.client.publish(self.topic_prefix+'/'+obj_name, 'OFF', retain=False) |