body camera and server tender 20250803
# 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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