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increase queue size and add ability to take every nth frame

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blakeblackshear 2019-04-19 08:23:07 -05:00
parent 03e46efcdd
commit a7d68a4998
2 changed files with 9 additions and 3 deletions
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2
detect_objects.py
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@ -36,7 +36,7 @@ def main():
client.loop_start()
# Queue for prepped frames, max size set to (number of cameras * 5)
max_queue_size = len(CONFIG['cameras'].items())*5
max_queue_size = len(CONFIG['cameras'].items())*10
prepped_frame_queue = queue.Queue(max_queue_size)
cameras = {}

10
frigate/video.py
View File

@ -13,7 +13,7 @@ from . objects import ObjectCleaner, BestPersonFrame
from . mqtt import MqttObjectPublisher
# fetch the frames as fast a possible and store current frame in a shared memory array
def fetch_frames(shared_arr, shared_frame_time, frame_lock, frame_ready, frame_shape, rtsp_url):
def fetch_frames(shared_arr, shared_frame_time, frame_lock, frame_ready, frame_shape, rtsp_url, take_frame=1):
# convert shared memory array into numpy and shape into image array
arr = tonumpyarray(shared_arr).reshape(frame_shape)
@ -24,6 +24,7 @@ def fetch_frames(shared_arr, shared_frame_time, frame_lock, frame_ready, frame_s
video.set(cv2.CAP_PROP_BUFFERSIZE,1)
bad_frame_counter = 0
frame_num = 0
while True:
# check if the video stream is still open, and reopen if needed
if not video.isOpened():
@ -36,6 +37,9 @@ def fetch_frames(shared_arr, shared_frame_time, frame_lock, frame_ready, frame_s
# snapshot the time the frame was grabbed
frame_time = datetime.datetime.now()
if ret:
frame_num += 1
if (frame_num % take_frame) != 0:
continue
# go ahead and decode the current frame
ret, frame = video.retrieve()
if ret:
@ -167,6 +171,7 @@ class Camera:
self.detected_objects = []
self.recent_frames = {}
self.rtsp_url = get_rtsp_url(self.config['rtsp'])
self.take_frame = self.config.get('take_frame', 1)
self.regions = self.config['regions']
self.frame_shape = get_frame_shape(self.rtsp_url)
self.mqtt_client = mqtt_client
@ -191,7 +196,8 @@ class Camera:
# create the process to capture frames from the RTSP stream and store in a shared array
self.capture_process = mp.Process(target=fetch_frames, args=(self.shared_frame_array,
self.shared_frame_time, self.frame_lock, self.frame_ready, self.frame_shape, self.rtsp_url))
self.shared_frame_time, self.frame_lock, self.frame_ready, self.frame_shape,
self.rtsp_url, self.take_frame))
self.capture_process.daemon = True
# for each region, create a separate thread to resize the region and prep for detection