batch extract subtitles from mkv files

mkvextractTracks2.sh

#!/bin/bash

# Extract all subtitles from every MKV file and save them with the same name as SRT files,
# with an optional prefix or suffix added to the file name.
# Copy to the folder where the MKV files live and run "./mkvextractTracks.sh [prefix] [suffix]" in terminal.
#
# info:
# mkvextract is used to extract the subtitles, so mkvtoolnix app (which contains the mkvextract binary) is used:
# https://mkvtoolnix.download/downloads.html
# please adjust below path to point to mkvextract or this script won't work

extractorPath='/usr/bin/mkvextract'

# Ensure we're running in the location of the script.
cd "`dirname $0`"

# Get the prefix and suffix from the command-line arguments
prefix=$1
suffix=$2

# Set the spinner characters
spin='-\|/'

# Count the number of MKV files
count=$(find . -maxdepth 1 -type f -name "*.mkv" | wc -l)

# Extract subtitles from each MKV file
i=1
for file in *; do
  if [[ $file == *.mkv ]]; then
      # Extract all subtitles from the file
      $extractorPath tracks "$file" --no-video --no-audio "${prefix}${file//mkv/srt}${suffix}"

      # Update the progress indicator
      printf "\rProcessing file $i/$count"
      i=$((i+1))
  fi
done

echo "Complete"