A simple shell script to batch process ISOs. I use it with cron to schedule every night.

ProcessISOs.sh

#/bin/bash

cd /home/benji/Videos;

for f in *.iso;
do
        HandBrakeCLI -i $f -o `basename $f .iso`.mp4 --preset "Android";
        if [ $? = 0 ]; then
                rm -f $f;
        fi
done