Raspberry pi webcam

1. Setup MJPG-Streamer

Install dependcies:

sudo apt-get install cmake libjpeg9-dev

Download package:

wget https://github.com/jacksonliam/mjpg-streamer/archive/master.zip

Build and install:

unzip master.zip && cd mjpg-streamer-master/mjpg-streamer-experimental
make && sudo make install

Test MJPT-Stramer:

/usr/local/bin/mjpg_streamer -i "/usr/local/lib/mjpg-streamer/input_uvc.so -n -f 10 -r 1280x720" -o "/usr/local/lib/mjpg-streamer/output_http.so -p 8084 -w /usr/local/share/mjpg-streamer/www

Setup script:

#!/bin/bash

# adjust these
INPUT_PLUGIN="/usr/local/lib/mjpg-streamer/input_uvc.so";
DEVICE="/dev/video0";
FRAMES="10";
RESOLUTION="1280x720";

OUTPUT_PLUGIN="/usr/local/lib/mjpg-streamer/output_http.so";
PORT="8084";

# the following are defaults and should not need to be changed
EXEC="/usr/local/bin/mjpg_streamer"
WEB_DIR="/usr/local/share/mjpg-streamer/www";

# mjgp_streamer often does not start on first try. Why ?
start_streamer(){
    for i in {1..5}    # try up to 5 times
    do
        ${EXEC} -b -i "${INPUT_PLUGIN} -n -d ${DEVICE} -f ${FRAMES} -r ${RESOLUTION}" -o "${OUTPUT_PLUGIN} -p ${PORT} -w ${WEB_DIR}"  > /dev/null 2>&1
        sleep $((1+i)) # waiting progressively longer
        if pgrep mjpg_streamer > /dev/null
        then
          echo "mjpg_streamer started"
          return
        fi
    done
    echo "could not start mjpg_streamer"
}

# Carry out specific functions when asked to by the system
case "$1" in
        start)
                if pgrep mjpg_streamer > /dev/null
                then
                    echo "mjpg_streamer already running"
                else
                    start_streamer
                fi
                ;;
        stop)
                if pgrep mjpg_streamer > /dev/null
                then
                    killall mjpg_streamer
                    echo "mjpg_streamer stopped"
                else
                    echo "mjpg_streamer is not running"
                fi
                ;;
        restart)
                if pgrep mjpg_streamer > /dev/null
                then
                    killall mjpg_streamer
                    echo "mjpg_streamer stopped"
                else
                    echo "mjpg_streamer is not running"
                fi
                start_streamer
                ;;
        status)
                pid=`ps -A | grep mjpg_streamer | grep -v "grep" | grep -v mjpg_streamer. | awk '{print $1}' | head -n 1`
                if [ -n "$pid" ];
                then
                        echo "mjpg_streamer is running with pid ${pid}"
                        echo "mjpg_streamer was started with the following command line"
                        cat /proc/${pid}/cmdline ; echo ""
                else
                        echo "mjpg_streamer is not running"
                fi
                ;;
        *)
                echo "Usage: $0 {start|stop|restart|status}"
                exit 1
                ;;
esac
exit 0

Grant permission:

chmod u+x ~/.local/bin/mjpg-streamer

Add script to crontab:

@reboot /home/vista/.local/bin/mjpg-streamer start && sleep 5 && /home/vista/.local/bin/mjpg-streamer restart

Reboot and open server at http://localhost:8084

2. Setup telegram bot

Install packages:

pip install -r requirements.txt

Build binary:

pyinstaller --onefile --distpath . telegramBot.py

Execute binary:

./telegramBot

Create a service:

[Unit]
Description=Telegram snapshot bot
After=network.target
StartLimitIntervalSec=0

[Service]
Type=simple
Restart=always
RestartSec=1
User=vista
ExecStart=/home/vista/projects/webcam/telegramBot

[Install]
WantedBy=multi-user.target

Enable service:

sudo systemctl enable telegramBot

Start service:

sudo systemctl start telegramBot

3. Useful links

• Pyinstaller usage
• Telegram send_photo API
• MJPG-Streamer setup example
• Raspberr pi using usb webcam tutorial