Shell script to do batch encoding using HandBrakeCLI. Automatically invokes HandBrakeCLI on each file passed in (you can also use BASH wildcards) and creates a new .m4v file (if one doesn't already exist). My script uses the "AppleTV 2" preset - just modify the script to use a different one.

handbrake.sh

#!/bin/bash

for f in "${@}"
do
  if [ ! -f "${f%.*}.m4v" ]; then
		HandBrakeCLI --preset="AppleTV 2" -i "$f" -o "${f%.*}.m4v"
	else 
		echo "Skpping $f - already exists: ${f%.*}.m4v"
	fi
done