[Bug] Review Preview API 404 for 00:30–01:00 Segment When Running as Home Assistant Add-on (Works in Docker)

[pk802]

Checklist

• I have updated to the latest available Frigate version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in incognito mode to rule out problems with any third party extensions or plugins I have installed.
• I have asked the AI at https://docs.frigate.video about my issue.

Describe the problem you are having

When running Frigate as a Home Assistant add-on, the Review Preview feature consistently fails for the 00:30–01:00 segment.

• If the current time is between 00:00–00:30, I cannot retrieve the preview for the 00:30–01:00 offset (API returns 404).
• If the current time is between 00:30–01:00, I get the preview for 00:00–00:30, but any preview inside 00:30–01:00 still returns 404.
• After the 01:00 mark, previews work normally again.

This happens consistently across three different instances running as Home Assistant add-ons, but does not occur in my Docker.

The issue affects:

• Frigate API (returns 404)
• Frigate UI (review previews missing for the same offset range)

I am in timezone UTC+5:30 (IST).
I’ve also seen previous bug reports about offset issues that were marked as resolved, but the problem still exists in my setup.

Steps to reproduce

1. If the current time is between 00:00–00:30, I cannot retrieve the preview for the 00:30–01:00 offset (API returns 404).
2. If the current time is between 00:30–01:00, I get the preview for 00:00–00:30, but any preview inside 00:30–01:00 still returns 404.
3. After the 01:00 mark, previews work normally again.

Version

0.16.1

In which browser(s) are you experiencing the issue with?

No response

Frigate config file

mqtt:
  host: core-mosquitto
  user: mqtt
  password: <REDACTED>
  enabled: true
  qos: 2
  stats_interval: 15

tls:
  enabled: false
ui:
  timezone: Asia/Kolkata

proxy:
  auth_secret: <REDACTED>

  header_map:
    user: x-forwarded-user
auth:
  enabled: false

logger:
  default: info

telemetry:
  version_check: true

database:
  path: /config/frigate.db



cameras:
  terrace2: 
    ffmpeg:
      output_args:
        record: preset-record-generic-audio-aac
      inputs:
        - path: rtsp://d9a18216-go2rtc:8554/terrace2 
          input_args: preset-rtsp-restream
          roles:
            - record
            - detect
    live:
      streams:
        terrace2: terrace2
    detect:
      width: 1920 # <---- update for your camera's resolution
      height: 1080 # <---- update for your camera's resolution
      fps: 5
    motion:
      mask:
        - 0.753,0.03,0.974,0.029,0.978,0.092,0.751,0.09
        - 0.444,0,0.451,0.871,0.42,1,0,1,0,0
      threshold: 50
      contour_area: 50

objects:
  track:
    - person
  filters:
    person:
      min_area: 8000
      max_area: 2400000
      min_score: 0.6
      threshold: 0.75

snapshots:
  enabled: true
  timestamp: false
  clean_copy: true
  bounding_box: true
  crop: false
  retain:
    default: 5

motion:
  threshold: 30
  improve_contrast: true
  mqtt_off_delay: 30


record:
  enabled: true
  retain:
    days: 1
    mode: active_objects
  alerts:
    retain:
      days: 1
    pre_capture: 20
    post_capture: 20
  detections:
    retain:
      days: 1
    pre_capture: 20
    post_capture: 20
detectors:

  ov_0:
    type: openvino
    device: GPU
  ov_1:
    type: openvino
    device: GPU


model:
  path: <REDACTED>

version: 0.16-0
detect:
  enabled: true

docker-compose file or Docker CLI command

N/A

Relevant Frigate log output

NGINX Logoutput

info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400353.690743-df4uwh/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400720.01139-seb5i8/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400475.049261-ivc2ry/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400353.690743-df4uwh/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400252.96832-t7y9xz/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400720.01139-seb5i8/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400475.049261-ivc2ry/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400353.690743-df4uwh/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"
info | 2025-09-09 07:06:04 | GET | "GET /api/review/1757400252.96832-t7y9xz/preview?format=mp4 HTTP/1.1" 404 47 "http://localhost:8082/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36" "-"

Relevant go2rtc log output

NA

Operating system

Home Assistant OS

Install method

Home Assistant Add-on

Network connection

Wired

Camera make and model

Dahua

Screenshots of the Frigate UI's System metrics pages

NA

Any other information that may be helpful

No response

[inkeep-ai-assistant[bot]]

The issue you're experiencing with Review Preview API 404 errors during the 00:30–01:00 time segment is a known problem. Based on the available sources, this appears to be related to a bug in Frigate's preview generation system.

The Review Preview API endpoint you're hitting returns a 404 when the preview data doesn't exist in the database(1). The API accepts an event_id parameter and can return previews in either gif or mp4 format(1).

Similar issues have been reported where preview generation fails for certain time periods. One documented case shows that when calling the API for event preview, users encountered PreviewsDoesNotExist errors, indicating that the preview data wasn't properly generated or stored in the database(2).

The error you're seeing in your logs shows 404 responses for specific review event IDs, which suggests that the preview files for those particular time segments aren't being created or are being created in the wrong location.

Since this issue appears to be specific to the Home Assistant add-on deployment and works correctly in Docker, it may be related to how the add-on handles file paths or preview generation timing compared to the standalone Docker installation.

For immediate troubleshooting, you could check if the preview files are actually being generated on disk in your Home Assistant add-on's data directory during those problematic time windows.

📚 Sources:

1. Review Preview
2. Internal server error when calling API for event_preview.gif and review_preview.gif

---

Have another question? Just tag @inkeep.

[NickM-27]

If it's an addon only issue then it's something that needs to be fixed there, add-ons use docker and the container running is identical

[NickM-27]

No, this is the correct place, but are you sure that it works in docker? Why are you running as an addon and in docker? What is your docker-compose?

[pk802]

I have 4 different locations running Frigate.
3 locations are running Frigate Addon in HAOS.
All these 3 location have exact same issue of offset and previews now showing in UI as well as API giving 404.
1 location is running docker compose which is working fine.
Here is my docker compose.

  frigate:
    image: ghcr.io/blakeblackshear/frigate:0.16.1
    container_name: frigate
    restart: unless-stopped
    depends_on:
      - mqtt5
      - go2rtc
    privileged: true
    shm_size: "2gb"
    volumes:
      - ./frigate/config:/config:rw
      - /home/ubuntu/frigate/clips:/media/frigate/clips:rw
      - /home/ubuntu/frigate/recordings:/media/frigate/recordings:rw
      - /dev/bus/usb:/dev/bus/usb:ro
      - /dev/dri:/dev/dri
      - /dev/dri/renderD128:/dev/dri/renderD128
      - type: tmpfs # Optional: 1GB of memory, reduces SSD/SD Card wear
        target: /tmp/cache
        tmpfs:
          size: 1000000000
    environment:
      - LIBVA_DRIVER_NAME=iHD
      - PLUS_API_KEY=<REDACTED>
    device_cgroup_rules:
      - 'c 189:* rmw'   # allow any ttyACM* (for Coral)
      - 'c 226:* rmw'
    network_mode: host

[NickM-27]

are all of them in a timezone with a 30 minute offset?

[pk802]

Yes all of them are in timezone with 30 min offset.

[pk802]

Let me know if any specific logs are helpful.