clean youtube subtitle files and clean-up them for reading

clean-sub.sh

echo $1

 echo "Removing --> time stuff"
 sed -i '/-->/d' $1

 echo "Removing empty lines"
 grep "\S" $1 > $1.txt

 echo "wrap long lines to 96 characters"
 fold -sw 96 $1.txt > $1.txt.fix

 echo "renaming file extension"
 rename 's/\.en.vtt.txt.fix$/.txt/' *.fix

 echo "Deleting old subtitle file"
 rm $1