import subprocess as sp
import tempfile

def ogg(inf):
    _, temppath = tempfile.mkstemp()
    p1 = sp.Popen(["ffmpeg", "-loglevel", "warning", "-i", inf, "-f", "flac", "-"], stdout=sp.PIPE)
    p2 = sp.Popen(["oggenc", "-Q", "-", "-o", temppath], stdin=p1.stdout, stdout=sp.PIPE)
    p1.stdout.close()
    _, err = p2.communicate()
    if err:
        raise Exception(err)
    return temppath