Create timelapse from synology security station recordings

create-yesterday-timelapse.sh

#!/bin/bash

camera="WansView - NCM624GB"
outputdir="/volume2/Shared/Bubby Night Timelapse"

today=$(date "+%Y%m%d")
yesterday=$(date --date yesterday "+%Y%m%d")
tempdir=~/timelapse/$today
inputfiles=$tempdir/files.txt
outputfile=$outputdir/$today.mp4

mkdir $tempdir
cat /dev/null > $inputfiles

for hour in $(seq -f "%02g" 20 23)
do
	find "/volume1/surveillance/$camera/${yesterday}PM" -type f -name "$camera$yesterday-$hour*" >> $inputfiles
done

for hour in $(seq -f "%02g" 0 7)
do
	find "/volume1/surveillance/$camera/${today}AM" -type f -name "$camera$today-$hour*" >> $inputfiles
done

counter=0;
while IFS='' read -r line || [[ -n "$line" ]];
do
	echo "Converting $line"
	outputindex=$(printf "%04d" $counter)
	ffmpeg -i "$line" -nostdin -filter:v "setpts=0.005*PTS" -an "${tempdir}/${outputindex}.mp4"
	counter=$((counter + 1))
done < "$inputfiles"

ls $tempdir/*.mp4|sort -n| sed -e "s/^\(.*\)$/file '\1'/" > $tempdir/final.txt

echo "Combining videos"
ffmpeg -f concat -safe 0 -i $tempdir/final.txt -nostdin -c copy "$outputfile"

echo "Removing temp dir"
rm -rf $tempdir

echo "Done!"