[Support]: Phantom detection "events"

[adamburgoyne]

Describe the problem you are having

I've been facing this issue for a little while now, on both the latest stable version and the latest beta version of Frigate. I'm using the HomeAssistant notification blueprint (by sgtbatten) and will very occasionally get a person detected notification when there's no actual person but the main concern is there's no attached screenshot or Frigate event present either.

The "Garden side person detection" entity from the Frigate integration shows a "detected" state at this point so I believe the notification automation is working as expected but I can't seem to find out why that state is being triggered as there's no corresponding event in Frigate.

This is the same every time I get a notification without a screenshot, there's never a corresponding event in Frigate so I'm a bit lost on where to look at what triggered it and the notifications don't seem to have any regularity which doesn't help troubleshooting.

Any idea what might cause Frigate to send these phantom person detected states?

Version

0.14.0-bccffe6

Frigate config file

database:
  path: /config/frigate.db

model:
  path: xxxxxxxx

birdseye:
  enabled: true
  mode: continuous
  restream: true

go2rtc:
  streams:
    doorbell:
      - ffmpeg:http:https://192.168.5.195/flv?port=1935&app=bcs&stream=channel0_main.bcs&user=admin&password=xxxxx#video=copy#audio=copy#audio=opus
    doorbell_sub:
      - ffmpeg:http:https://192.168.5.195/flv?port=1935&app=bcs&stream=channel0_ext.bcs&user=admin&password=xxxxx
    duo_two:
      - rtsp:https://admin:[email protected]:554/h264Preview_01_main
    duo_two_sub:
      - rtsp:https://admin:[email protected]:554/h264Preview_01_sub

cameras:
  doorbell:
    ffmpeg:
      inputs:
        - path: rtsp:https://127.0.0.1:8554/doorbell
          input_args: preset-rtsp-restream
          roles:
            - record
        - path: rtsp:https://127.0.0.1:8554/doorbell_sub
          input_args: preset-rtsp-restream
          roles:
            - detect
    detect:
      width: 1280
      height: 720
      fps: 5
    record:
      enabled: true
      retain:
        days: 10
      events:
        retain:
          default: 14
    snapshots:
      enabled: true
      required_zones:
        - driveway
    zones:
      driveway:
        coordinates: 485,489,788,479,881,482,1155,544,1280,438,1280,720,0,720,0,462
        objects:
          - person
          - face
          - dog
    motion:
      mask:
        - 1280,0,1280,45,1095,46,1173,178,1206,308,1147,290,1089,249,1062,252,891,235,877,262,693,262,574,310,504,309,447,222,198,464,0,440,0,0
    review:
      alerts:
        required_zones:
          - driveway
  duo_two:
    ffmpeg:
      inputs:
        - path: rtsp:https://127.0.0.1:8554/duo_two
          input_args: preset-rtsp-restream
          roles:
            - record
        - path: rtsp:https://127.0.0.1:8554/duo_two_sub
          input_args: preset-rtsp-restream
          roles:
            - detect
    detect:
      width: 1536
      height: 576
      fps: 5
    objects:
      track:
        - dog
        - person
        - face
        - sports_ball
      filters:
        person:
          min_area: 6000
          max_area: 60000
          min_score: .80
          threshold: .85
        dog:
          max_area: 40000
    record:
      enabled: true
      retain:
        days: 7
      events:
        retain:
          default: 7
    snapshots:
      enabled: true
      required_zones:
        - garden_side
    motion:
      mask:
        - 0,0.562,0,0,0.372,0,0.351,0.041,0.275,0.098,0.208,0.163,0.058,0.58
        - 0.928,0.406,0.831,0.205,0.648,0,0.893,0,1,0,1,0.554
        - 0.945,0.927,0.949,1,0.824,1,0.823,0.929
    zones:
      garden_side:
        coordinates: 
          0,1,0.632,1,1,1,1,0.585,0.943,0.45,0.855,0.276,0.765,0.132,0.609,0,0.484,0,0.388,0.046,0.277,0.12,0.212,0.185,0.067,0.594,0,0.717
        inertia: 3
    review:
      alerts:
        required_zones: garden_side
objects:
  track:
    - person
    - face
    - dog
  filters:
    person:
      min_score: .65
      threshold: .85
    dog:
      min_score: .7
      threshold: .9
    face:
      min_score: .7

# Enable sound and HW accelleration
ffmpeg:
  hwaccel_args: preset-vaapi
  output_args:
    record: preset-record-generic-audio-aac

detectors:
  coral:
    type: edgetpu
    device: usb
version: 0.14

Relevant log output

N/a

FFprobe output from your camera

N/a

Frigate stats

No response

Operating system

Proxmox

Install method

Docker Compose

Coral version

USB

Network connection

Wired

Camera make and model

Reolink Duo 2

Any other information that may be helpful

No response

[NickM-27]

this is most likely a detection that has never moved, frigate requires an object that is detected to have moved at some point to create an event otherwise it is much more likely to be a false positive

[adamburgoyne]

I must be misunderstanding then. Would you still expect Frigate to pass "detected" through to HA in this case, if Frigate has determined it's not likely to be a true positive? If it's not worthy of an event in Frigate I'd expect the HA entity to reflect that too.

[NickM-27]

They are not 1:1 and /events topic (used for blueprint) is not either.

[adamburgoyne]

Interesting, is there anything that is a 1:1 between them?

Personally if Frigate has ultimately decided there isn't a person detected I wouldn't expect it to tell HA that there was.

[NickM-27]

the /events topic is a raw topic. Many users have notifications for things that aren't saved in frigate. For example, a notification when fedex drives by but you don't want to save an event for that.

in frigate 0.14 the /reviews topic is 1:1 with the UI

[adamburgoyne]

The reviews topic seems like what I'm looking for, I'll change it in the blueprint and check everything is working as before and hopefully that solves it! Thanks.