body camera and server tender 20250803

Publish Time: 2025-08-04 22:08:56

# Key Recommendations for Hardware and Functionality

**Main Takeaway:** A compact Linux-based system using an ARM Cortex-A53/A72 SoC (e.g. Raspberry Pi Compute Module 4 or similar), paired with a fixed-focus MIPI CSI-2 wide-angle camera module that includes onboard ISP and HDR/low-light enhancement, plus dual 15 000 mAh hot-swappable USB-C battery packs, will meet 1080p@30 fps RTMP/SRT streaming with 2–15 minute delay, onboard buffering to microSD, and simple over-the-air updates.

## 1. Core Compute Platform

Choose a System-on-Module or SOM with:

- **Processor:** ARM Cortex-A72 or A53 dual-core (≥1.5 GHz) for reliable H.264 encoding.

- **GPU/ISP:** Integrated Mali-G52 or equivalent for hardware video encode.

- **Memory & Storage:**

- 1 GB LPDDR4

- 16 GB eMMC 5.1

- Optional SPI NOR flash for bootloader

- **Networking:**

- Built-in IEEE 802.11 b/g/n 2.4 GHz Wi-Fi + PCB antenna

- **Example Platforms:**

- Raspberry Pi Compute Module 4 (CM4) with 2 lane MIPI CSI-2

- NVIDIA Jetson Nano (for more advanced AI, if needed)

**Operating System:**

A lightweight Linux distribution such as Debian Bullseye or Ubuntu Core. Use Docker or a Yocto-built image for deterministic builds and OTA updates.

## 2. Camera & Optics

- **Sensor Module:** MIPI CSI-2 fixed-focus 1080p camera with integrated ISP supporting HDR and low-light enhancement.

- Example: EV5M-CSM1 (Sony IMX335, 130° FOV, HDR, Starvis low-light)[1]

- **Connector:** 24-pin FFC MIPI CSI

- **Optics:** Wide-angle lens (≥100° diagonal), manual focus set at factory

*Onboard ISP ensures clear 1080p30 video without cloud processing.*

## 3. Power Subsystem

- **Batteries:** Two 15 000 mAh Li-ion pouch packs, USB-C input for hot-swap, magazine-style slot

- **Battery Management:**

- Protection IC for over-charge/discharge

- PMIC supporting USB-PD input and system power-path management

- **Regulators:** 3.3 V and 1.8 V LDO/DC-DC converters

## 4. Buffering & Local Storage

- **microSD Slot:** Class 10 UHS-I card for up to 64 GB

- **Function:** Continuous circular buffering; on link failure, record to microSD until connectivity restores

## 5. Streaming Protocols & Software

- **Protocols:** RTMP for broad compatibility; SRT if unreliable Wi-Fi environments demand packet-loss recovery and configurable latency[2]

- **Server:**

- Self-hosted Nginx-RTMP module or a managed CDN

- **Encoder:** GStreamer or FFmpeg with H.264 hardware acceleration

- **Latency Profiles:**

- Blitz: 2 min

- Rapid: 5 min

- Classical: 15 min

## 6. User Interface & Controls

- **Buttons:**

- Power on/off

- Wi-Fi connect setup (WPS or web portal)

- Mode selector (choose delay profile or battery status)

- **LED Indicators:**

- Power (red/green)

- Wi-Fi status (blue)

- Streaming active (pulsing green)

- Battery level (4-segment)

## 7. Mechanical & Thermal

- **Enclosure:** Die-cast aluminum alloy, ~120 × 60 × 15 mm

- **Thermal:** Thermal pad under SoC; vents or heat spreader as needed

- **Branding:** Engraved “FIDE” and “Chessviewlive” on top surface; font and placement to match overall aesthetic

## 8. EMI & Protection

- **EMI Filters:** Common-mode chokes on USB and battery power lines

- **ESD Protection:** TVS diodes on USB-C, MIPI CSI lines

- **RF Matching:** PCB tuning network for Wi-Fi antenna

## 9. Firmware & Updates

- **Configuration:** Pre-burn factory RTMP URL and stream key

- **Auto-Start:** Streaming begins on power-on in selected delay mode

- **Updates:**

- Recommend OTA via Wi-Fi (e.g., Mender or SWUpdate)

- Fallback USB-C side-load or JTAG

## 10. Documentation Package for Manufacturer

Deliverables:

- Complete BOM spreadsheet (designators, MPNs, descriptions, alternates, cost, compliance)

- PCB Gerber files and assembly drawings

- 3D CAD enclosure files with tolerances

- Test-fixture and programming interface guide

- Certification notes (BIS, CE/FCC for Wi-Fi)

This configuration ensures clear 1080p@30 fps live streaming over Wi-Fi with robust buffering and flexible delay profiles, housed in a rugged, branded enclosure, ready for manufacturer handoff.

[1] https://www.innodisk.com/en/products/camera/mipi-csi-2/ev5m-csm1-rtcf

[2] https://www.videosdk.live/developer-hub/rtmp/implementing-srt-streaming-developers-guide

[3] https://www.electronicspecifier.com/news/blog/real-time-video-streaming-for-surveillance-applications

[4] https://www.youtube.com/watch?v=cNvGy9BUayY

[5] https://www.reddit.com/r/embedded/comments/1frdrqu/soc_recommendation_for_processing_and_streaming_a/

[6] https://www.digitalocean.com/community/tutorials/how-to-set-up-a-video-streaming-server-using-nginx-rtmp-on-ubuntu-20-04

[7] https://www.innodisk.com/en/products/camera/mipi-csi-2/ev8m-csm1-rtcf

[8] https://www.dacast.com/blog/video-buffering/

[9] https://promwad.com/news/top-hardware-platforms-embedded-ai-2025

[10] https://www.red5.net/blog/what-is-rtmp-streaming-protocol/

[11] https://www.seeedstudio.com/IMX390-2-12MP-118-H-FOV-4-lane-MIPI-CSI-Camera-p-5708.html

[12] https://forums.puri.sm/t/issue-with-playing-music-from-micro-sd-solved/17257?page=2

[13] https://anyconnect.com/best-soc-som-sbc-ai-accelerator-smart-cameras

[14] https://www.happytimesoft.com/products/rtmp-server/index.html

[15] https://www.sinoseen.com/mipi-camera-module-for-image-processing-systems-with-imx462-sensor-hdr-120fps

[16] https://community.st.com/t5/stm32-mcus-embedded-software/trouble-with-streaming-audio-from-external-sd-card-wav-file/td-p/746326

[17] https://www.nabto.com/how-to-choose-a-security-camera-chipset/

[18] https://www.wowza.com/blog/how-to-set-up-an-rtmp-server-on-windows-linux-and-mac

[19] https://www.e-consystems.com/camera-category/low-light-usb-mipi-cameras.asp

[20] https://www.reddit.com/r/videography/comments/1hrtj9m/sd_card_slot_to_pc_does_it_exist/

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