#!/usr/bin/env bash
# usage: $scriptname $files $output_sub_format
output_sub_format=${@: -1}
for i in "$@"
do
  if [ ! -e "$i" ];
  then
  	echo "File does not exist."
  	continue
  fi
  index=$(ffprobe -v 8 -show_streams -select_streams s "$i" | grep index | cut --delimiter="=" -f 2)
  if [ -z "$index" ];
  then
  	echo "No subtitle streams found."
  	exit
  fi
  ffprobe -v 8 -show_streams -select_streams "$i"
  filename=${i%.*}
  mkvextract "$i" tracks "$index":"${filename}.en.ass"
  if [ -n "$1" ];
  then
  	subtitleedit /convert "${filename}.en.ass" "$output_sub_format" 2>/dev/null | grep --color=none ass
  fi
done