- -quiet -ao null -vo null -frames 0 -identify -dvd-device "$1" dvd:// | \
- grep 'ID_DVD_TITLE_[0-9]*_LENGTH'
+ -quiet -ao null -vo null -frames 0 -identify -dvd-device "$1" dvd:// | \
+ grep 'ID_DVD_TITLE_[0-9]*_LENGTH' | \
+ sed -e 's/ID_DVD_TITLE_//' -e 's/_LENGTH=/ /' | \
+ sort -n