Quick script to transcode a flac music collection to opus

flac2opus.py

#!/usr/bin/env python

import os
import sys

basedir = sys.argv[1]
for root, dirs, files in os.walk(basedir):
    cmd = 'avconv -i "{infile}" -map 0:a -codec:a \
        opus -b:a 48k -vbr on "{outfile}"'
    print "Visiting", root
    for filename in files:
        (f, ext) = filename.rsplit('.', 1)
        if ext == 'flac':
            outdir = os.path.join("opus", root[len(basedir):])
            try:
                os.makedirs(outdir)
            except OSError, e:
                if e.errno != 17:
                    raise

            infile = os.path.join(root, filename)
            outfile = os.path.join(outdir, f + ".opus")
            print "Infile:   {infile}\n Outfile: {outfile}".format(
                infile=infile, outfile=outfile)
            if not os.path.exists(outfile):
                os.system(cmd.format(infile=infile, outfile=outfile))