Stops detection of objects when one person appears in a region

[alex-savin]

Hey Folks,

I have a problem with detecting a "person" object. When it appears in a region frigate stops detecting any objects at all. I was trying to play around with variable "min_person_area", setting it low (70) or high (7000), but nothing helps.
Might be I setup something wrong, could you please help me to figure out a proper way.

Thanks in advance

Frame with the "car" objects

Frame with the "car" and "person" objects, but there are no more frames

[blakeblackshear]

Do you see any errors in the logs when a person steps in the frame?

[alex-savin]

@blakeblackshear

Exception in thread Thread-10:
Traceback (most recent call last):
  File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
    self.run()
  File "/opt/frigate/frigate/object_detection.py", line 55, in run
    self.cameras[frame['camera_name']].add_objects(parsed_objects)
  File "/opt/frigate/frigate/video.py", line 260, in add_objects
    y_location = min(int(obj['ymax']), len(self.mask)-1)
TypeError: object of type 'NoneType' has no len()

and after that all the logs fulfilled with

queue full. moving on
queue full. moving on
queue full. moving on
queue full. moving on
queue full. moving on
queue full. moving on
queue full. moving on
queue full. moving on
...

[alex-savin]

@blakeblackshear I found the issue, I was missing mask file back-mask.bmp in the config folder

Sorry for disturbing!

PS: Could you please brief explanation for the mask and how to use it?! Thank you in advance

[blakeblackshear]

It must be the same dimensions as your video feed, and if the bottom center of the bounding box for the detected person is on a black pixel, it will be ignored.