Perhaps you have a very broken shell. $ function echon { echo $# $*; } $ >'foo bar.mp4' $ for i in *.mp4; do echon "$i" "${i%mp4}mp3"

Perhaps you have a very broken shell. $ function echon { echo $# $*; } $ >'foo bar.mp4' $ for i in *.mp4; do echon "$i" "${i%mp4}mp3"; done 2 foo bar.mp4 foo bar.mp3