Pre_capture and Post_capture #18396

Al-Dek · 2025-05-26T10:21:38Z

Al-Dek
May 26, 2025

Describe the problem you are having

I'm tried to setup pre&post_capture in my Frigate config:
as global settings:

##################################
#===== GLOBAL RECORD ===========#
##################################
record:
  sync_recordings: true
  enabled: true
  retain:
    days: 10
    mode: all
  alerts:
    retain:
      days: 30
    pre_capture: 10
    post_capture: 15
  detections:
    retain:
      days: 30
    pre_capture: 10
    post_capture: 15

and as local for camera:

#------------------ Cam-1  DETECT configuration ---------------------------#
    record:
      retain:
        days: 0
        mode: all
      alerts:
        retain:
          days: 30
        pre_capture: 10
        post_capture: 15
      detections:
        retain:
          days: 30
        pre_capture: 10
        post_capture: 15
    live:
      stream_name: Cam-1-s

neither of these settings (nor both together) work.
All recorded detection clips are shorter than expected.
For example:
Cam-1 (codec H.264 and setting as above) I have next records of detected cats:

Date            Clip duration (s)   Object lifecicle dur.(s)   My expectations (s)        
2025-05-26      7                          1                    26    (pre_capture=10+lifecicle=1+post_capture=15)
2025-05-15      11                         1                    26    ...
...

and this behavior applies to all cameras and all kinds of objects (Person, Car, Cat ..).
It is clear that the lifecycle of an object can be much shorter than its visibility in the clip, but why are the clips themselves so short?
Monitoring recording (24x10) works perfectly.

Version

0.15.0-6cb5cfb

Frigate config file

############################################################################
#============================== UI ========================================#
############################################################################

ui:
  time_format: 24hour

############################################################################
#============================== MQTT ======================================#
############################################################################

mqtt:
  enabled: true
  host: 192.168.2.43
  port: 1883
  user: хх
  password: хх
  stats_interval: 60

############################################################################
#============================== LOGGER ====================================#
############################################################################

logger:
  default: info
  # Optional: Component specific logger overrides
  #logs:
  #  frigate.object_detection: debug
  #  detector.coral: debug
  #  frigate.mqtt: debug
  #  frigate.event: debug

############################################################################
#====================== In-feed TIMESTAMP configuration ===================#
############################################################################
timestamp_style:
  position: bl
  format: '%d/%m/%Y %H:%M:%S'
  color:
    red: 255
    green: 255
    blue: 255
  thickness: 2
  effect: shadow #solid #shadow


############################################################################
#============================= BIRDSEYE ===================================#
############################################################################

birdseye:
  enabled: false
  mode: continuous
  layout:
    scaling_factor: 2.0

############################################################################
#================================= GO2RTC =================================#
############################################################################

go2rtc:

  streams:
    #---------- Recording -------------------------------------------------#
    Cam-0-s:
      - rtsp://хх@192.168.2.51:554/cam/realmonitor?channel=1&subtype=0
    Cam-1-s:
      - rtsp://хх@192.168.2.52/onvif/device_service
      - ffmpeg:Cam-1-s#audio=aac
    Cam-2-s:
      - rtsp://хх@192.168.2.48/Streaming/Channels/101
    Cam-3-s:
      - rtsp://хх@192.168.2.47:554/cam/realmonitor?channel=1&subtype=0
    Cam-4-s:
      - rtsp://хх@192.168.2.35:554/cam/realmonitor?channel=1&subtype=0
    Cam-5-s:
      - rtsp://хх@192.168.2.49:554/cam/realmonitor?channel=1&subtype=0

############################################################################
#============================= VARIABLES ==================================#
############################################################################

environment_vars:
  LIBVA_DRIVER_NAME: iHD

############################################################################
#============================== GLOBAL FFMPEG =============================#
############################################################################

ffmpeg:
  # hwaccel_args:
  #  - -hwaccel
  #  - vaapi
  #  - -hwaccel_device
  #  - /dev/dri/renderD128
  #  - -hwaccel_output_format
  #  - yuv420p
  hwaccel_args: preset-vaapi

############################################################################
#========================= GLOBAL SPANSHOTS ===============================#
############################################################################

snapshots:
  enabled: true    # Enable writing jpg snapshot to /media/frigate/clips
  bounding_box: true
  clean_copy: true
  timestamp: true
  crop: false
  # height: 350
  retain:
    default: 10
    objects:
      person: 30
  quality: 80

############################################################################
#============================ GLOBAL RECORD ===============================#
############################################################################

record:
  sync_recordings: true
  enabled: true
  retain:
    days: 10
    mode: all
  alerts:
    retain:
      days: 30
    pre_capture: 10
    post_capture: 15
  detections:
    retain:
      days: 30
    pre_capture: 10
    post_capture: 15

############################################################################
#============================ DETECTORS ===================================#
############################################################################

detectors:
  coral_pci:
    type: edgetpu
    device: pci

############################################################################
#============================== REWIEV ====================================#
############################################################################

review:
  alerts:
    labels:
      - person
      - cat
      - car
      - squirrel


############################################################################
#                                                                          #
#============================== CAMERAS ===================================#
#                                                                          #
############################################################################

cameras:

############################################################################
#============================== CAM-0 Main view from Entrance =============#
############################################################################

  Cam-0:
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.51/
#__________________________________________________________________________#
#------------------ Cam-0 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.51:554/cam/realmonitor?channel=1&subtype=0 # rtsp://127.0.0.1:8554/Cam-0-s
          roles:
            - record

        - path: rtsp://хх@192.168.2.51:554/cam/realmonitor?channel=1&subtype=1
          roles:
            - detect
      output_args:
        record: preset-record-generic-audio-copy

#__________________________________________________________________________#
#------------------ Cam-0 OBJECTS configuration ---------------------------#
    objects:
      track:
        - person
        - cat
        - car       # size on road - 1319px
      filters:
        person:
          min_area: 5000 # minimum width*height (def - 0)
          max_area: 30000 # maximum width*height (def - 24 000 000 real tuned 16k-30k)
          min_ratio: 0.2 # minimum width/height  (def - 0)
          max_ratio: 1.0 # maximum width/height  (def - 24000000)
          min_score: 0.4 # minimum score for the object (def - 0.5)
          threshold: 0.7 # minimum decimal percentage for tracked object's (def - 0.7)
          mask:
            - 0.551,0.629,0.755,0.627,0.773,1,0.674,1,0.561,1
            - 0.453,0.933,0.435,0.637,0.319,0.647,0.31,0.929,0.393,0.98
        cat:
          min_area: 200 # minimum width*height (def - 0)
          max_area: 4000 # maximum width*height (def - 24000000)
          min_ratio: 0.2 # minimum width/height (def - 0)
          max_ratio: 4.0 # maximum width/height (def - 24000000)
          min_score: 0.2 # minimum score for the object (def - 0.5)
          threshold: 0.6 # minimum decimal percentage for tracked object's (def - 0.7)

#__________________________________________________________________________#
#------------------ Cam-0 MOTION configuration ----------------------------#
        car:
          mask:
            - 0.167,0.104,0.433,0.093,0.443,0.284,0.569,0.286,0.562,0.427,0.181,0.428
            - 0.727,0.174,1,0.182,1,0.47,0.72,0.466
    motion:
      threshold: 25
      contour_area: 15
      improve_contrast: true
      mask: 0.314,0.192,0.537,0.158,1,0.286,1,0,0.391,0,0,0,0,0.2
    detect:
      enabled: true
      width: 704
      height: 576
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-0 LIVE View configuration -------------------------#   
    live:
      stream_name: Cam-0-s
###########################################################################


############################################################################
#============================== CAM-1 MAIN CAMERA =========================#
############################################################################

  Cam-1:
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.52/
#__________________________________________________________________________#
#------------------ Cam-1  ONVIF configuration ----------------------------#
    onvif:
      host: 192.168.2.52
      port: 80
      user: admin
      password: _Hamster_2020
      autotracking:
        enabled: false
        calibrate_on_startup: false
        zooming: disabled
        zoom_factor: 0.3
        track:
          - squirrel
          - person
          - cat
          - car
        return_preset: home
        timeout: 10

#__________________________________________________________________________#
#------------------ Cam-1 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.52/Streaming/Channels/103
          roles:
            - detect
        - path: rtsp://127.0.0.1:8554/Cam-1-s
          roles:
            - record
      output_args:
        record: preset-record-generic-audio-copy
#__________________________________________________________________________#
#------------------ Cam-1  OBJECTS configuration --------------------------#
    objects:
      track:
        - squirrel
        - person
        - cat
        - car


      filters:
        person:
          min_area: 25000 # minimum width*height 
          # max_area: 100000 # maximum width*height 
          min_ratio: 0.2 # minimum width/height 
          max_ratio: 2.0 # maximum width/height 
          min_score: 0.6 # minimum score for the object to initiate tracking (def - 0.5)
          threshold: 0.7 # minimum decimal percentage for tracked object's  (def - 0.7)
        # mask: 0,0,1000,0,1000,200,0,200  # based on the bottom center of the bounding box 
        cat:
          min_area: 6500 # minimum width*height 
          max_area: 15000 # maximum width*height 
          min_ratio: 0.2 # minimum width/height 
          max_ratio: 4.0 # maximum width/height 
          min_score: 0.6 # minimum score for the object to initiate tracking (def - 0.5)
          threshold: 0.7 # minimum decimal percentage for tracked object's  (def - 0.7)
        squirrel:
          min_area: 1000 # minimum width*height (def - 0)
          max_area: 6000 # maximum width*height (def - 24000000)
          min_ratio: 0.2 # minimum width/height (def - 0)
          max_ratio: 4.0 # maximum width/height (def - 24000000)
          min_score: 0.2 # minimum score for the object (def - 0.5)
          threshold: 0.6 # minimum decimal percentage for tracked object's (def - 0.7)
        car:
          min_area: 6500 # minimum width*height 
          min_ratio: 0.2 # minimum width/height 
          max_ratio: 4.0 # maximum width/height 
          min_score: 0.6 # minimum score for the object to initiate tracking (def - 0.5)
          threshold: 0.7 # minimum decimal percentage for tracked object's  (def - 0.7)

#__________________________________________________________________________#
#------------------ Cam-1  MOTION configuration ---------------------------#
    motion:
      threshold: 25  # value between 1- more sensitive and 255 - less.
      contour_area: 15
      delta_alpha: 0.2
      frame_alpha: 0.2
    #  frame_height: 100
      mask: 1,0,1,0.146,0.617,0.146,0.361,0.131,0.325,0.136,0.196,0.161,0,0.211,0,0
      improve_contrast: true

#__________________________________________________________________________#
#------------------ Cam-1  DETECT configuration ---------------------------#
    detect:
      enabled: true
      width: 1280
      height: 720
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-1  DETECT configuration ---------------------------#
    record:
      retain:
        days: 0
        mode: all
      alerts:
        retain:
          days: 30
        pre_capture: 10
        post_capture: 15
      detections:
        retain:
          days: 30
        pre_capture: 10
        post_capture: 15
    live:
      stream_name: Cam-1-s

############################################################################
#============================== CAM-2 GARAGE CAMERA =======================#
############################################################################ 

  Cam-2:
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.48/
#__________________________________________________________________________#
#------------------ Cam-2 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.48/Streaming/Channels/101 
          roles:
            - record
        - path: rtsp://хх@192.168.2.48/Streaming/Channels/102
          roles:
            - detect
      output_args:
        record: preset-record-generic-audio-copy

#__________________________________________________________________________#
#------------------ Cam-2 OBJECTS configuration ---------------------------#
    objects:
      track:
        - person
      filters:
        person:
#          min_area: 1000 # minimum width*height (def - 0)
#          max_area: 70000 # maximum width*height (def - 24000000)
#          min_ratio: 0.2 # minimum width/height  (def - 0)
#          max_ratio: 2.0 # maximum width/height  (def - 24000000)
#          min_score: 0.3 # minimum score for the object to initiate tracking (def - 0.5)
#          threshold: 0.7 # minimum decimal percentage for tracked object's e (def - 0.7)
          mask:
            - 0.563,0.429,0.623,0.42,0.652,0.533,0.623,0.606,0.588,0.602
            - 0.353,0.4,0.42,0.397,0.477,0.987,0.289,0.989

#__________________________________________________________________________#
#------------------ Cam-2 MOTION configuration ----------------------------#

    motion:
      threshold: 20
      contour_area: 40
      mask:
        - 186,409,186,432,27,432,27,409
        - 768,0,768,77,641,73,537,42,262,56,263,97,0,138,0,0

#__________________________________________________________________________#
#------------------ Cam-2 DETECT configuration ----------------------------#
    detect:
      enabled: true
      width: 768
      height: 432
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-2 LIVE View configuration -------------------------#   
    live:
      stream_name: Cam-2-s


############################################################################
#============================== CAM-3 UTILITY ROOM ========================#
############################################################################

  Cam-3:
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.47/
#__________________________________________________________________________#
#------------------ Cam-3 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.47:554/cam/realmonitor?channel=1&subtype=0 
          roles:
            - record
        - path: rtsp://хх@192.168.2.47:554/cam/realmonitor?channel=1&subtype=1
          roles:
            - detect
      output_args:
        record: preset-record-generic-audio-copy

#__________________________________________________________________________#
#------------------ Cam-3 OBJECTS configuration ---------------------------#
    objects:
      track:
        - person

#__________________________________________________________________________#
#------------------ Cam-3 MOTION configuration ----------------------------#
    motion:
      threshold: 25
      contour_area: 50
      mask: 0.326,0.055,0.325,0,0,0,0,0.054
    detect:
      enabled: true
      width: 704
      height: 576
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-3 LIVE View configuration -------------------------#   
    live:
      stream_name: Cam-3-s


############################################################################
#============================== CAM-4 WORKSHOP ============================#
############################################################################

  Cam-4: # <------  Camera 4  Workshop 
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.35/
#__________________________________________________________________________#
#------------------ Cam-4 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.35:554/cam/realmonitor?channel=1&subtype=0
          roles:
            - record
        - path: rtsp://хх@192.168.2.35:554/cam/realmonitor?channel=1&subtype=1
          roles:
            - detect
      output_args:
        record: preset-record-generic-audio-copy
#__________________________________________________________________________#
#------------------ Cam-4 OBJECTS configuration ---------------------------#
    objects:
      track:
        - person
        - cat
      filters:
        person:
          min_area: 4500 # minimum width*height (def - 0)
          max_area: 30000 # maximum width*height (def - 24 000 000)
          min_ratio: 0.2 # minimum width/height  (def - 0)
          max_ratio: 1.0 # maximum width/height  (def - 24000000)
          min_score: 0.4 # minimum score for the object (def - 0.5)
          threshold: 0.7 # minimum decimal percentage for tracked object's (def - 0.7)
          mask: 0.658,0.567,0.655,0.439,0.711,0.438,0.717,0.566  # mask to prevent object type from being detected
        cat:
          min_area: 200 # minimum width*height (def - 0)
          max_area: 1000 # maximum width*height (def - 24000000)
          min_ratio: 0.2 # minimum width/height (def - 0)
          max_ratio: 4.0 # maximum width/height (def - 24000000)
          min_score: 0.2 # minimum score for the object (def - 0.5)
          threshold: 0.6 # minimum decimal percentage for tracked object's (def - 0.7)
        # mask: 0,0,1000,0,1000,200,0,200  # mask to prevent this object type from being detected

#__________________________________________________________________________#
#------------------ Cam-4 MOTION configuration ----------------------------#

    motion:
      threshold: 25
      contour_area: 10
      mask:
        - 1,0.066,1,0,0,0,0,0.066
        - 0.637,0.374,0.735,0.374,0.737,0.566,0.642,0.567
        - 0.665,0.066,0.665,0.305,0.858,0.349,0.997,0.366,0.998,0.069
        - 0.251,0.066,0.259,0.381,0.398,0.374,0.386,0.064
        - -0.001,0.344,0.256,0.338,0.254,0.064,0.002,0.066
      improve_contrast: true
    detect:
      enabled: true
      width: 704
      height: 576
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-4 LIVE View configuration -------------------------#   
    live:
      stream_name: Cam-4-s


############################################################################
#============================== CAM-5 STORAGE =============================#
############################################################################

  Cam-5:
#__________________________________________________________________________#
#------------------  Web Interface ----------------------------------------#
    webui_url: http://192.168.2.49/
#__________________________________________________________________________#
#------------------ Cam-5 FFMPEG configuration ----------------------------#
    ffmpeg:
      inputs:
        - path: rtsp://хх@192.168.2.49:554/cam/realmonitor?channel=1&subtype=0
          roles:
            - record
        - path: rtsp://хх@192.168.2.49:554/cam/realmonitor?channel=1&subtype=1
          roles:
            - detect
      output_args:
        record: preset-record-generic-audio-copy

#__________________________________________________________________________#
#------------------ Cam-5 OBJECTS configuration ---------------------------#
    objects:
      track:
        - person
        - cat
#      filters:
#        person:
#          min_area: 5000 # minimum width*height (def - 0)
#          max_area: 30000 # maximum width*height (def - 24 000 000)
#          min_ratio: 0.2 # minimum width/height  (def - 0)
#          max_ratio: 1.0 # maximum width/height  (def - 24000000)
#          min_score: 0.4 # minimum score for the object (def - 0.5)
#          threshold: 0.7 # minimum decimal percentage for tracked object's (def - 0.7)
        # mask: 0,0,1000,0,1000,200,0,200  # mask to prevent object type from being detected
#        cat:
#          min_area: 200 # minimum width*height (def - 0)
#          max_area: 4000 # maximum width*height (def - 24000000)
#          min_ratio: 0.2 # minimum width/height (def - 0)
#          max_ratio: 4.0 # maximum width/height (def - 24000000)
#          min_score: 0.2 # minimum score for the object (def - 0.5)
#          threshold: 0.6 # minimum decimal percentage for tracked object's (def - 0.7)
        # mask: 0,0,1000,0,1000,200,0,200  # mask to prevent this object type from being detected

#__________________________________________________________________________#
#------------------ Cam-5 MOTION configuration ----------------------------#
    motion:
      threshold: 20
      contour_area: 10
      improve_contrast: true
      mask:
        - 199,189,372,132,704,363,704,0,275,0,0,0,0,134,0,269

#__________________________________________________________________________#
#------------------ Cam-5 DETECT configuration ----------------------------#
    detect:
      enabled: true
      width: 704
      height: 576
      fps: 5

#__________________________________________________________________________#
#------------------ Cam-5 LIVE View configuration -------------------------#   
    live:
      stream_name: Cam-5-s

###########################################################################
###########################################################################
#                      END OF CONFIG


version: 0.15-1

Relevant Frigate log output

There are no applicable log messages

Relevant go2rtc log output

There are no applicable log messages

Frigate stats

No response

Operating system

Home Assistant OS

Install method

Home Assistant Add-on

docker-compose file or Docker CLI command

...

Object Detector

Coral

Screenshots of the Frigate UI's System metrics pages

Any other information that may be helpful

No response

Answered by NickM-27

May 26, 2025

While recordings are saved, the video times are still cut to when the object was detected as this is an object specific video. You can use the button in the top right to go to the history view for full access

View full answer

NickM-27 · 2025-05-26T11:17:33Z

NickM-27
May 26, 2025
Collaborator Sponsor

Where are you viewing the clips to know of the recordings were saved or not?

0 replies

Al-Dek · 2025-05-26T11:42:00Z

Al-Dek
May 26, 2025
Author

Here, in Explore.

1 reply

NickM-27 May 26, 2025
Collaborator Sponsor

While recordings are saved, the video times are still cut to when the object was detected as this is an object specific video. You can use the button in the top right to go to the history view for full access

Answer selected by Al-Dek

Al-Dek · 2025-05-26T12:26:32Z

Al-Dek
May 26, 2025
Author

Thanks!!!
I just looked through the Events button - yes, it's convenient and correct in terms of time.
And I found another 1 hour (including this event time period) of preview (low res) recording for Cam-1 , but I did not understand on what principle it was being written.

3 replies

Dzonzi May 26, 2025

What is your hardware? Mini pc?

Al-Dek May 26, 2025
Author

Yes.
EQ12, Intel N100, 16Gb, 1TB.

Dzonzi May 26, 2025

Could you let me know how you connected Coral to PCI? I have USB version and it has 22 ms interference time....

Al-Dek · 2025-05-26T15:31:41Z

Al-Dek
May 26, 2025
Author

I have M.2 Coral now.
Before it I used USB version and as I remember inference speed was 9-12 ms.
Unfortunately I had problems from time to time with Coral power supply via USB EQ12.
This PC model has a rather weak USB power supply - no more than 600-700 mA@5V.
I didn't want to use a USB hub with additional power, there are a lot of wires without it.
Try to change USB cable - my "from box" cable was of poor quality.

0 replies

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Al-Dek May 26, 2025

Describe the problem you are having

Version

Frigate config file

Relevant Frigate log output

Relevant go2rtc log output

Frigate stats

Operating system

Install method

docker-compose file or Docker CLI command

Object Detector

Screenshots of the Frigate UI's System metrics pages

Any other information that may be helpful

Replies: 4 comments · 4 replies

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NickM-27 May 26, 2025 Collaborator Sponsor

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Al-Dek May 26, 2025 Author

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NickM-27 May 26, 2025 Collaborator Sponsor

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Al-Dek May 26, 2025 Author

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Dzonzi May 26, 2025

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Dzonzi May 26, 2025

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Al-Dek May 26, 2025 Author

Al-Dek
May 26, 2025

Replies: 4 comments 4 replies

NickM-27
May 26, 2025
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Al-Dek
May 26, 2025
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NickM-27 May 26, 2025
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May 26, 2025
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May 26, 2025
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