#!/bin/bash

# crude script for recording streaming audio shows with mplayer.
#
# dean@arctic.org
#
# this script is public domain.

if [ $# != 4 ]; then
	echo "usage: $0 outputbasename extension length_in_minutes url" 1>&2
	exit 1
fi

basename="$1"
ext="$2"
length="$3"
url="$4"

d=`date +"%Y%m%d-%H%M"`

mplayer -quiet -cache 64 \
	-ao pcm:waveheader -af-adv force=3 \
	-ao pcm:file=>(lame --silent --preset 64 - "$basename$d.$ext") \
	-- "$url" &
child=$!

timeout() {
	kill -TERM $child
	exit
}

trap timeout SIGALRM

(sleep $((length*60)); kill -ALRM $$) &

wait $child