Audio extract from Video with intended interval (avconv)

extaud

#!/bin/bash

#read -r filename < $1
exec < $1
read filename
#echo "$filename"

while read s e
do
	echo "${s} - ${e}"
#	echo "${s:(-2)} - ${e}"
#	echo "${s%${s:(-2)}}:${s:(-2)} - ${e%${e:(-2)}}:${e:(-2)}"
#	echo "${s:2} - ${e}"
	s1=`printf %02d $(( 10#${s%${s:(-2)}} ))`
	e1=`printf %02d $(( 10#${e%${e:(-2)}} ))`
#	s1=${s%${s:(-2)}}
#	e1=${e%${e:(-2)}}
	let ss=10#${s1}*60+10#${s:(-2)}
	let ee=10#${e1}*60+10#${e:(-2)}
	let du=ee-ss
	echo "${s1}:${s:(-2)} - ${e1}:${e:(-2)} --> ${ss} sec to ${ee} sec for ${du} secs."
	echo ""
	avconv -i "${filename}" -ss ${ss} -t ${du} -metadata artist="er" -metadata title="${s1}${s:(-2)}-${e1}${e:(-2)}" -metadata album="$1" -vn -acodec aac -strict experimental -y "audio/$1.${s1}${s:(-2)}-${e1}${e:(-2)}.m4a"
done