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AI · May 21, 2025

AB

AI Baby Monitor – local Video-LLM that beeps when safety rules break

Hi HN! I built AI Baby Monitor – a tiny stack (Redis + vLLM + Streamlit) that watches a video stream and a YAML list of safety rules. If the model spots a rule being broken it plays beep sound, so you can quickly glance over and check on your baby. Why? When we bought a crib for our daughter, the first thing she tried was climbing over the rail :/ I got a bit paranoid about constantly watching her over, so I thought of a helper that can *actively* watch the baby, while parents could stay *semi-actively* alert. It’s meant to be an additional set of eyes, and *not* a replacement for the…

In plain words

AI Baby Monitor is a local video monitoring system that watches a live video stream against customizable safety rules defined in YAML. When the system detects a rule violation, it emits an audio alert to notify parents to check on their child. Built on Redis, vLLM, and Streamlit, it runs a vision language model locally to analyze video frames. The tool is designed for parents of infants and toddlers as an additional layer of supervision, not a replacement for active parental oversight. It alerts through sound only, keeping parents semi-attentive rather than glued to screens.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

Hi HN! I built AI Baby Monitor – a tiny stack (Redis + vLLM + Streamlit) that watches a video stream and a YAML list of safety rules. If the model spots a rule being broken it plays beep sound, so you can quickly glance over and check on your baby. Why? When we bought a crib for our daughter, the first thing she tried was climbing over the rail :/ I got a bit paranoid about constantly watching her over, so I thought of a helper that can *actively* watch the baby, while parents could stay *semi-actively* alert. It’s meant to be an additional set of eyes, and *not* a replacement for the adult. Thus, just a beep sound and not phone notifications. How it works * *stream_to_redis.py* captures video stream frames → Redis streams * *run_watcher.py* pulls the latest N frames, injects them + the rules into a prompt and hits a local *vLLM* server running *Qwen 2.5 VL* * Model returns structured JSON (`should_alert`, `reasoning`, `awareness_level`) * If `should_alert=True` → `playsound` beep * Streamlit page displays both camera and LLM logs

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