ZeroDivisionError: division by zero

[Tetsujinfr]

hi

I am processing a 4minutes video with many people appearing overtime, say about 200 or so. While running the people_demo (replaced the demo video by the 4 minutes 38secs video (6942 frames), I did run my own face detector, did recompute the homography dict sucessfully, etc), all was running fine but all a sudden I got this error after some processing:

... ... INFO:root:change track {'current': [3252, 3283], 'new': [3287]} INFO:root:ratio {('center_x', 'center_y'): 1.333521432163324e-74} INFO:root:change track {'current': [3252, 3283], 'new': [3287]} multiprocessing.pool.RemoteTraceback: """ Traceback (most recent call last): File "/usr/lib/python3.7/multiprocessing/pool.py", line 121, in worker result = (True, func(*args, **kwds)) File "/usr/lib/python3.7/multiprocessing/pool.py", line 47, in starmapstar return list(itertools.starmap(args[0], args[1])) File "/content/AcurusTrack/pipeline.py", line 297, in window_processing wind_obj.algo_iteration() File "/content/AcurusTrack/track/tracker.py", line 73, in algo_iteration self.internal_loop() File "/content/AcurusTrack/track/tracker_merger.py", line 75, in internal_loop accepted_count = self.acc_obj.analyse_acceptance(self.change_track) File "/content/AcurusTrack/track/tracker.py", line 288, in analyse_acceptance self.curr_acceptance = self.get_acceptance(change_track) File "/content/AcurusTrack/track/tracker.py", line 322, in get_acceptance ratio = self.compute_ratio(pair, change_track) File "/content/AcurusTrack/track/tracker.py", line 385, in compute_ratio lkls_ratio = self.likelihoods_multiplication(lkls_new_diff_curr, lkls_curr_diff_new) File "/content/AcurusTrack/track/tracker.py", line 350, in likelihoods_multiplication power = values / len(curr_diff_new) ZeroDivisionError: division by zero """

The above exception was the direct cause of the following exception:

Traceback (most recent call last): File "./examples/people_in_masks_demo/people_in_masks_demo.py", line 85, in algorithm.run_analyser() File "/content/AcurusTrack/pipeline.py", line 154, in run_analyser final_meta_dict, hom = self.get_meta() File "/content/AcurusTrack/pipeline.py", line 57, in decorator meta, hom = func(ref) File "/content/AcurusTrack/pipeline.py", line 68, in decorator meta, homography_dict = func(ref) File "/content/AcurusTrack/pipeline.py", line 148, in get_meta final_meta = self.analysis() File "/content/AcurusTrack/pipeline.py", line 82, in decorator meta = func(ref) File "/content/AcurusTrack/pipeline.py", line 135, in analysis self.process_windows_separately() File "/content/AcurusTrack/pipeline.py", line 234, in process_windows_separately pool.starmap(window_processing, self.wind_objects) File "/usr/lib/python3.7/multiprocessing/pool.py", line 276, in starmap return self._map_async(func, iterable, starmapstar, chunksize).get() File "/usr/lib/python3.7/multiprocessing/pool.py", line 657, in get raise self._value ZeroDivisionError: division by zero

Do you know what that comes from? Can this happen if no object is detect on a given frame or something like that? Can it be caused by the length of the video? For reference the video can be found here

thanks for your help

[vishneuskaja]

Hi! Thanks for the provided results! Our team will be checking it soon. We'll get back to you with a reply.

[Tetsujinfr]

Let me attach the input files I used which did trigger the error, hopefully that may ease your investigation.

https://user-images.githubusercontent.com/29961693/132199705-79636886-9a30-4240-8de0-4e6d53307dd4.mp4

input_video_1080p_detections.json.txt

[Tetsujinfr]

hi, any update on this issue? thanks

[Tetsujinfr]

hi did you have a chance to replicate the issue / find a fix? thanks