convert

#!/bin/bash

# > convert <
# Uses ffmpeg to convert audio files to different codecs.
# Written by parisminton for Concrete Daydreams.
# <parisminton@da.ydrea.ms>

# Usage: `convert <source> <destination> <codec>`

vrs='v 0.1'
lastchange='12/27/17'
echo -e "\n--> Convert $vrs $lastchange <--"

# change IFS to newline
OLD_IFS=$IFS
IFS=$'\n'

# if no arguments, exit -1 and warn the user she needs to choose a source, destination and codec

# if only one argument, exit -1 and warn the user she needs to choose a destination

# if only two arguments, exit -1 and warn the user she needs to choose a codec

src="$1"
destination="$2"
codec="$3"

i=0

function filter () {
  if [ -d "$1" ]; then
    # make breadcrumb trail of destinations
    old_dest[$i]=$destination
    i=$(($i+1))

    mkdir "$destination/$1"
    destination="$destination/$1"
    echo "All destinations are ${old_dest[*]}"
    echo "$destination"

    # drill down to files
    cd "$1"
    for new_path in $(ls -1); do
      filter $new_path
    done

    cd ..
    destination="${old_dest[($i-1)]}"
    unset old_dest[$i]
    i=$(($i-1))
  else
    # conversion happens here
    cp $1 $destination
    echo $1
  fi
}

for path in $(ls -1 $src); do
  filter $path
  i=0
done