Synology DSM Task Scheduler custom script to remux any mkv files as mp4, moving old files to Recycle Bin

remux.sh

#!/usr/bin/env bash

# by Matt Sephton @gingerbeardman
# requires SynoCommunity ffmpeg to be installed

log="/volume1/video/Scripts/remux.log"
bin="/volume1/video/#recycle/"
work="/volume1/video/Scripts/"

export log
export bin

function output ()
{
	echo "$1"
	echo "$1" >> $log
}
export -f output

function outprint ()
{
	printf "$1"
	printf "$1" >> $log
}
export -f outprint

function notify ()	# Remux, status, path, info
{
	#echo "Args are \"$@\""

	synodsmnotify @administrators "$1 $2" "$3"
	msg="$2 = $3"
	output $msg
}
export -f notify

cd $work
total=$(find ../ -type f \( -iname \*.mkv -o -iname \*.avi \) -not -path "../#recycle*" | wc -l)
if [ $total -eq 0 ]; then
	output "no files found"
	exit
fi
notify Remux found "$total files"

function process_pass ()
{
	notify Remux OK "$short ($runtime seconds)"
	output "OK"
	mv "$1" "$bin"
}
export -f process_pass

function process_fail ()
{
	notify Remux FAIL "$short" ""
}
export -f process_fail

function process_file ()
{
	fullname=$(basename "$1")
	short="${fullname%.*}"

	outprint "$short = "

	start=`date +%s`
	/usr/local/ffmpeg/bin/ffmpeg -y -i "$1" -c copy -movflags +faststart "${1%.*}.mp4" -hide_banner -loglevel error
	end=`date +%s`

	runtime=$((end-start))

	status=$?
	[ $status -eq 0 ] && process_pass "$1" || process_fail "$1"
}
export -f process_file

echo "" > $log

find ../ -type f \( -iname \*.mkv -o -iname \*.avi \) -not -path "../#recycle*" -print0 | xargs -0 -n1 bash -c 'process_file "$@"' _

wait
total=$(find ../ -type f \( -iname \*.mkv -o -iname \*.avi \) -not -path "../#recycle*" | wc -l)
notify Remux complete "$total files remaining"