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Edge Video AnalyticsReference design

AI Gun Detection

Runs the open-source Frigate NVR with a gun detection model on a local AI box, using existing IP cameras. When a gun appears in view it draws a box, saves a snapshot and clip, and sends an MQTT event to your alarm system. It is meant for school gates, shop counters, petrol pump stores, office lobbies and venue entrances, as an extra alert for guards.

EducationRetailParking and smart city

Talk to an engineer See the hardware

The problem

Why it matters.

Entrances already have cameras but nobody can watch every feed for a weapon.

About 10 minutes to set up
Video stays inside the network
No accuracy figure published; page advises testing on own footage

The flow

From signal to action.

01SenseIP camerasExisting cameras send a sub-stream for detection and a main stream for recording over RTSP.
02DecideGun modelFrigate checks every frame with a gun detection model on the GPU or NPU.
03RecordClip storageEach event saves a snapshot and video clip on the box.
04ConnectMQTT eventAn event message goes to the alarm system on the local network.
05PeopleGuard reviewStaff check events, scores and clips in the browser dashboard.

Deployment architecture

How it is wired.

The devices on site, what carries their data, where the decision is made and where the result goes.

01ConnectCarries the data

RTSP
ONVIF cameras

02DecideRuns the model

reComputer Super J40121 per site
reComputer AI Industrial R2135-121 per site
Frigate NVR
HailoRT

03Your systemsWhere results land

MQTT
HTTP
Docker
NVIDIA Container Toolkit

How it works

Step by step.

01Put the detection box on the same network as the cameras.
02Enter up to two RTSP addresses in the deploy form, or add more in the config file.
03On Jetson, wait 5 to 10 minutes on first start while the model compiles.
04Frigate checks each frame and boxes any gun with a confidence score.
05Each event saves a snapshot and clip and publishes an MQTT message.
06Guards review events in the dashboard, filtered by camera, label and date.

The hardware

What goes on site.

Items we stock can go straight in the bag. Everything else we source and quote with the installation.

reComputer Super J4012Jetson box for more cameras, default host1 per site₹1,59,389
reComputer AI Industrial R2135-12Compact Hailo box for one or two cameras1 per siteSourced on quote

Before you install

IP cameras with RTSP streams on the same network as the box. Hikvision, Dahua and generic ONVIF cameras work.
Cameras with a clear, steady view of entrances or corridors, close enough for a gun to appear at a usable size.
Free disk for clips and snapshots, at least 4 GB on the Hailo box. Defaults keep 3 days of recordings and 14 days of snapshots.
Internet only during setup to pull images and models.
Good lighting at the watched entrance, since poor light hurts detection.

Good to know

No public accuracy figure is given. Test with your own footage before linking alerts to any response.
Small guns, guns partly hidden by a hand or clothing, and poor lighting are likely misses.
It is an assistive alert, not certified screening equipment, and does not replace guards or metal detectors.
Frigate is MIT licensed, but the detection models have their own terms, and the Hailo YOLO11s model is AGPL-3.0 unless commercially licensed.

How we deliver it

Paper to site, one team.

01Site surveyWe walk the site, or review photos and drawings, and agree what to measure and where each device goes.
02PilotOne lane, one line or one room first. We tune it on your conditions and agree what good looks like.
03Roll outWe supply the hardware in India with GST invoices, install it, and connect it to the systems you already run.
04SupportSpares, remote checks and model updates, with one team to call when something changes.

Questions

Asked before buying.

Can it replace metal detectors or guards?

No. It is an extra alert for staff, not certified screening, and it can miss hidden or small weapons.

Does footage go to the cloud?

No. Video is analysed and recorded on the box. Only the dashboard and MQTT events are reachable, and only on your network.

Will it work with our Hikvision or Dahua cameras?

Yes. Any camera with an RTSP stream works without changes to the camera.

Want this on your site?

Tell us the site and the problem. We come back with a pilot plan and a priced hardware list.

Book a call with an engineer Write to us

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