#! /bin/sh

if [ -z "$2" ]; then
   echo "Usage: $0 input.avi size [comments]"
   exit 1
fi

avisplit -i "$1" -s "$2" || exit 1

if [ "$3" ]; then
   comments_file="$3"
fi

i=0
part="`printf '%04d' $i`"
while [ -r "$1"-$part ]; do
   i="`expr $i + 1`"
   if [ "$comments_file" ]; then
      avimerge -i "$1"-$part -f $comments_file -o CD$i.avi || exit 1
      rm "$1"-"$part"
   else
      mv "$1"-$part CD$i.avi || exit 1
   fi
   part="`printf '%04d' $i`"
done