convert video to voice

#!/bin/bash

function convert_video_to_voice() {
  # sudo apt install detox ffmpeg
  # tested on GNU bash, version 5.1.16(1)-release (x86_64-pc-linux-gnu)
  s_loc="/media/ramdisk/"
  s_ext="ts\|mp4"
  o_ext="mp3"
  # normalize file names
  readarray -t folderNames < <(find "$s_loc" -type f -regex '.*\.\('$s_ext'\)$' -exec bash -c 'f_loc="{}"; dir="${f_loc%/*}"; rename_file=$(detox -s iso8859_1 "$f_loc"); echo "$dir" | sed "s/.*\///"' \;)
  # move & rename files
  find "$s_loc" -type f -regex '.*\.\('$s_ext'\)$' -exec bash -c 'f_loc="{}"; f_nm="$(basename "$f_loc")"; f_rt="${f_nm%.*}"; f_ex="${f_nm##*.}" ; d_loc=$(echo '$s_loc'$f_rt"_"$(date +%s%N)"."$f_ex); mv "$f_loc" "$d_loc"' \;
  # delete root parent folders
  readarray -t folderNamesUnique < <(printf '%s\n' "${folderNames[@]}" | sort -u)
  if [ ${#folderNamesUnique[@]} -gt 0 ]; then
    cd $s_loc
    for fdir in "${folderNamesUnique[@]}"; do
      if [ -d "$fdir" ]; then
        rm -r "$fdir"
      fi
    done
  fi
  # convert files
  readarray -t files < <(find "$s_loc" -maxdepth 1 -type f -regex '.*\.\('$s_ext'\)$' | sed "s/.*\///")
  if [ ${#files[@]} -gt 0 ]; then
    cd $s_loc
    for i in "${files[@]}"; do
      filename="${i%.*}"
      echo $filename
      cmd=$(echo ffmpeg -nostdin -i '"'$i'" -vn -acodec libmp3lame -ac 2 -ab 32k -ar 16000' '"'$filename"."$o_ext'"')
      echo $cmd
      bash -c "$cmd"
    done
  fi
  # organize files by current date and file extension
  d_loc=$(echo $s_loc$(date '+%Y-%m-%d_%H-%M-%S'))
  readarray -t files < <(find "$s_loc" -maxdepth 1 -type f -regex '.*\.\('$s_ext'\|'$o_ext'\)$' | sed "s/.*\///")
  if [ ${#files[@]} -gt 0 ]; then
    cd $s_loc
    for i in "${files[@]}"; do
      extension="${i##*.}"
      if echo "$extension" | grep -q "$o_ext" ; then
        o_dir="$d_loc/$o_ext"
      else
        o_dir="$d_loc/video"
      fi
      mkdir -p "$o_dir"
      mv "$i" "$o_dir/$i"
    done
  fi
}

convert_video_to_voice