Helper script to convert wav files to mp3 with ffmpeg.

convert.sh

#!/bin/bash

BITRATE=320
defvalue='.'
SOURCE_DIR=${1:-$defvalue}

# Validate arguments
if [[ "$#" == 0 ]]; then 
    echo >&2 "Usage: ./convert.sh ./exports/*.wav"
    exit 1;
fi

# Validate requirements
command -v ffmpeg >/dev/null 2>&1 || { echo >&2 "please install ffmpeg (brew install ffmpeg)"; exit 1; }

FILES="$@"
for I in $FILES
do
    # Convert wav to mp3 using ffmpeg
    echo "Converting $I..."
    ffmpeg -i "${I}" -b:a ${BITRATE}k "${I/%.wav/.mp3}" >/dev/null 2>&1
    echo "done!"
done