Small update: The plant is approximately growing at a rate of 125μm per hour (3mm per day). At the 11^th of December 2022 it had grown out of the top of the image. The camera was adjusted and recordings continue. The plant will again grow out of the top soon. I will probably stop the recordings when that happens. Maybe I can find another target ;-)

Final update: the plant is too big and the rig too inflexible to continue.

#!/bin/bash

unset DISPLAY

MYDIR="/tmp/imgs"
mkdir -p $MYDIR
cd $MYDIR

# Make sure we have GPIO 4 exported
[ -d /sys/class/gpio/gpio4 ] || sudo echo "4" > /sys/class/gpio/export
sleep 0.5

# Turn on the light
if [ -d /sys/class/gpio/gpio4 ]; then
	sudo echo "out" > /sys/class/gpio/gpio4/direction
	sudo echo "1" > /sys/class/gpio/gpio4/value
	sleep 1
fi

# The extra shell is to kill the SIGSEGV message from the shell because guvcview crashes on exit
bash -c "guvcview -i $MYDIR/banana.jpg -g none -m none -n 1 -t 1 -e > /dev/null 2>&1" 2> /dev/null

# Turn off the light
if [ -d /sys/class/gpio/gpio4 ]; then
	sudo echo "0" > /sys/class/gpio/gpio4/value
fi

# Save data to remote server
if [ -f "$MYDIR/banana-1.jpg" ]; then
	scp "$MYDIR/banana-1.jpg" "user@server.example.com:bananas/banana-$(date "+%Y%m%d%H%M%S").jpg" > /dev/null 2>&1
fi

cd /tmp
rm -f $MYDIR/*

#!/bin/bash

# The script directory contains all images. Make sure we are there
cd $(dirname "$0")

# Annotate the image(s) with date/time stamp
for i in banana-*.jpg
do
	# file must exist (it doesn't if glob failed)
	[ -f "$i" ] || continue
	mv $i tmp.jpg
	# Extract date/time from filename
	TXT="$(echo "$i" | cut -c 8-15) $(echo "$i" | cut -c 16-19)"
	convert tmp.jpg \
		-font DejaVu-Sans -pointsize 20 \
		-fill black \
		-stroke black \
		-strokewidth 2 \
		-annotate +20+25 "$TXT" \
		-stroke None \
		-fill white \
		-annotate +20+25 "$TXT" \
		"a${i}"
	rm -f tmp.jpg
done

# Video ahead, one image at a time
ffmpeg -loglevel error -y -framerate 24 -pattern_type glob -i 'abanana-*.jpg' -c:v libx264 -pix_fmt yuv420p zzbanana.mp4
# Covert it to webm too
ffmpeg -loglevel error -y -i zzbanana.mp4 -cpu-used -5 -b:v 0 -crf 30 -pass 1 -an -f webm /dev/null
ffmpeg -loglevel error -y -i zzbanana.mp4 -cpu-used -5 -b:v 0 -crf 30 -pass 2 zzbanana.webm
rm -f ffmpeg2pass-0.log

# Make accesible by webserver
mv -f zzbanana.mp4 /my-web-directory-somewhere-in-space-and-time/banana.mp4
mv -f zzbanana.webm /my-web-directory-somewhere-in-space-and-time/banana.webm