python script to recursively convert all files in a source directory to a target directory using ffmpeg

convert_mp3.py

#!/usr/bin/python
import os
import pprint
import subprocess

src_dir = '/Volumes/Untitled CD'
dst_dir = '/tmp/cd'

for root, dirs, files in os.walk(src_dir):
    for f in files:
        prefix, suffix = os.path.splitext(f)
        if '.m4a' == suffix:
            abspath_in = root + '/' + f
            dir_out = root.replace(src_dir, dst_dir)
            if not os.path.exists(dir_out):
                os.makedirs(dir_out)
            abspath_out = dir_out + '/' + prefix + '.mp3'
            subprocess.call(['ffmpeg', '-i', abspath_in, '-y', abspath_out])

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