So I've got this little script that processes video files for me.

#!/bin/bash
cd /mnt/media/vert/input/

ls -1 | while read line; do
  cat=`echo "$line" | sed 's/ .*//'`

  if [ "$cat" == "Movie" ]; then
    echo "This is a movie!"
    /mnt/media/util/autovert-movie.sh "$line"
  elif [ "$cat" == "TV" ]; then
    echo "This is a TV show!"
    /mnt/media/util/autovert-tv.sh "$line"
  elif [ "$cat" == "TVl" ]; then
    echo "This is a long TV show!"
    /mnt/media/util/autovert-tvl.sh "$line"
  elif [ "$cat" == "Premium" ]; then
    if [[ "$line" == *"Kevin Ryan"* ]]; then
      echo "This is another Kevin Ryan short!"
      /mnt/media/util/autovert-kevin.sh "$line"
    fi
  else
    echo "I don't know what this is, so I'll leave it be."
  fi
done

echo "All done!"
exit

In /mnt/media/vert/input I currently have the following files for testing:

TV - Bigfoot and Wildboy - Secret Monolith.mkv
TV - Bigfoot and Wildboy - Sonic Projector.mkv
TV - Bigfoot and Wildboy - The Trappers.mp4
TV - Bigfoot and Wildboy - The White Wolf.mkv
TV - Bigfoot and Wildboy - UFO.mkv

If I run the script, it passes control to autovert-tv.sh like it's supposed to, which processes the first file in the list (in this case, TV - Bigfoot and Wildboy - Secret Monolith.mkv), and then exits (with the "All done!" message) instead of moving on to the next file in the loop.

Why is my loop not actually looping?