simpleCam

Surveillance camera with Motion- and Noise-Detector

Hardware requirements

I tested the code with the following setup:

• Raspberry Pi 4 Model B (4GB)
• Electreeks Raspberry Pi Camera with IR cut-off filter
• USB microphone
• HC-SR-501 PIR Sensor

Prerequisites

Install dependencies

sudo apt install python3 python3-pip python3-pyaudio lame ffmpeg libasound-dev portaudio19-dev libportaudio2 libportaudiocpp0

sudo apt-get install libcblas-dev libhdf5-dev libhdf5-serial-dev libatlas-base-dev libjasper-dev libqtgui4 libqt4-test

pip3 install -r requirements.txt

Create virtual audio devices

sudo modprobe snd-aloop

sudo echo 'snd-aloop' >> /etc/modules

Create virtual video device

sudo modprobe v4l2loopback devices=1

This will create /dev/video1

Gather additional information

To determine the ID of your physical and loopback audio devices, run:

arecord -l

You may replace hw:2,0 (physical input) and hw:3,1 (virtual loopback output) in the ffmpeg command below with your respective IDs in the format hw:device,subdevice.

To get the audio ID used by PyAudio, run:

python3 /path/to/util/get_device_index.py

To get info on your microphone's default sample rate, run:

python3 /path/to/util/get_device_info.py --device [device_id]

Edit config

Edit simplecam/.env to your particular setup.

Prepare environment

Set project path

SIMPLECAM_PATH=/path/to/simplecam

Launch node server

npm start --prefix ${SIMPLECAM_PATH}/server &

Start streaming

ffmpeg -hide_banner -re -f alsa -ar 44100 -ac 1 -i hw:2,0 -f v4l2 -i /dev/video0 -c:a aac -b:a 128k -y -s 480x320 -b:v 2014k -preset ultrafast -tune zerolatency -crf 23 -f v4l2 /dev/video1 -f alsa hw:3,1 -force_key_frames "expr:gte(t,n_forced*2)" -hls_time 1 -hls_list_size 10 -hls_flags delete_segments -start_number 1 ${SIMPLECAM_PATH}/server/stream/index.m3u8 &

This will create the HLS stream as well as create a copy of the video and audio streams to be used by motion and noise detection.

Access in the browser

Go to http://your-host:8081