Tool to default unknown audio tracks in MKV files to English (therby avoiding unnecessary subtitles)

fixunknownaudio.sh

#!/bin/sh
#
# Requires mkvtoolnix
#
find . -name \*.mkv | while read file
do
  mkvinfo "$file" | grep -q 'Language: und'
  if [ $? = 0 ]; then
    echo $file
    mkvpropedit --edit track:v1 --set language=eng --edit track:a1 --set language=eng "$file"
  fi
done