A quick gist to convert wma files in a folder to mp3 files. Uses the command line tool ffmpeg.

wma_convert.py

#!/usr/bin/python
import os

for file in os.listdir("."):
	if file.endswith("wma"):
		name = file[:-4]
		command  = "ffmpeg -i '{0}.wma' '{0}.mp3' -y".format(name)
		os.system(command)

wma_convert.sh

#!/bin/bash

while IFS= read -u 4 -r LINE; do
	ffmpeg -i "$LINE" "${LINE%.*}.mp3" -y
done 4< <(exec find "." -type f -name '*.wma')