LiveATC archive

record.sh

#!/bin/bash
# https://gist.github.com/ericek111/7463aa1c2367683e51578789767a583a

# Check if SOX is installed
if ! hash "${SOX:-sox}" 2>/dev/null; then
	echo "ERROR: SOX was not found in path ${SOX:-sox}"
	echo "Run: sudo apt-get install sox libsox-fmt-mp3"
	exit 1
fi

if [[ $# -eq 0 ]]; then
	echo "Usage: record.sh (ICAO code) [threshold] [-t]"
	echo "    ICAO code - according to liveatc.net, airport code + mount code, e. g. KJFK_TWR"
	echo "    threshold - sox argument, static noise threshold level"
	echo "    -t - test, if the script is running and sox recording. If it isn't, start recording."
	echo "  > by ericek111: https://gist.github.com/ericek111/7463aa1c2367683e51578789767a583a"
	exit 1
fi
threshold="1.5%"
if [[ "$2" -ne "-t" ]]; then threshold="$2"; fi

ABSPATH=`pwd`
pidfile="$ABSPATH/record_${1,,}.pid"
spawnedpid=0
mkdir -p "$ABSPATH/rec"
mkdir -p "$ABSPATH/pls"

checkifrecording(){
	sleep 3
	if ps -p $! > /dev/null; then
		echo $! > "$pidfile"
	else
		echo "Not recording!!!"
	fi
}

if [ -f "$pidfile" ]; then
	if ps -p `cat "$pidfile"` > /dev/null; then
		if [[ $* == *"-t"* ]]; then exit 0; fi
		echo "Interrupting previous recording of ${1^^} (`cat "$pidfile"`) started on `date -r "$pidfile" "+%d. %m. %Y in %H:%M:%S"`"
		kill `cat "$pidfile"`
	else
		echo "Previous recording of ${1^^} (`cat "$pidfile"`) started on `date -r "$pidfile" "+%d. %m. %Y in %H:%M:%S"` ended abruptly!"
	fi
	rm "$pidfile"
fi

plsfile="$ABSPATH/pls/${1,,}.pls"
if [ -f "$plsfile" ]; then
	rm "$plsfile"
fi 
wget_output=$(wget -4 -N -q -O "$plsfile" "https://www.liveatc.net/play/${1,,}.pls")
if [ $? -ne 0 ]; then
	rm "$plsfile"  2> /dev/null
	echo "ERROR: Invalid facility: ${1^^}!"
	exit 2
else
	echo "Downloaded ${1,,}.pls: $(cat "$plsfile" |head -n2|tail -n1 | cut -c 7-)"
fi

newfilename="$ABSPATH/rec/${1^^}_$(date +%Y-%m-%d_%H-%M-%S)"
echo "${SOX:-sox} -t mp3 $plsfile $newfilename.mp3 silence -l 1 0.3 $threshold -1 2.0 $threshold"
"${SOX:-sox}" -t mp3 $plsfile "$newfilename.mp3" silence -l 1 0.3 "$threshold" -1 2.0 "$threshold" &>>"$newfilename.txt" &
spawnedpid=$!
checkifrecording &