Ter uma coluna com o bitrate (e outras propriedades) dos mp3 no Nautilus

Finalmente!
# apt-get install python-nautilus python-mutagen
$ mkdir ~/.nautilus/python-extensions

Gravar isto no ficheiro ~/.nautilus/python-extensions/bsc.py :

#!/usr/bin/python

import os
import urllib
import nautilus
from mutagen.easyid3 import EasyID3
from mutagen.mp3 import MPEGInfo

class ColumnExtension(nautilus.ColumnProvider, nautilus.InfoProvider):
 def __init__(self):
  pass

 def get_columns(self):
  return (nautilus.Column("NautilusPython::title_column","title","Title","Song title"),
  nautilus.Column("NautilusPython::album_column",
    "album",
    "Album",
    "Album"),
  nautilus.Column("NautilusPython::artist_column",
    "artist",
    "Artist",
    "Artist"),
  nautilus.Column("NautilusPython::bitrate_column",
    "bitrate",
    "Bitrate",
    "Bitrate"),)

 def update_file_info(self, file):
  if file.get_uri_scheme() != 'file':
   return
  if file.is_mime_type('audio/mpeg'):
   filename = urllib.unquote(file.get_uri()[7:])
   audio = EasyID3(filename)

  if (os.path.isfile (filename) and (not os.path.isdir (filename))):
   mpfile = open (filename)
   mpinfo = MPEGInfo (mpfile)
   br = str(mpinfo.bitrate/1000) + " Kbps"
  else:
   br = ""

  file.add_string_attribute('title', audio["title"][0])
  file.add_string_attribute('album', audio["album"][0])
  file.add_string_attribute('artist', audio["artist"][0])
  file.add_string_attribute('bitrate', br)
  self.get_columns() 

Depois, basta ir a uma janela do Nautilus, e em Edit -> Preferences -> List Columns seleccionar as colunas que se pretendem adicionar.

Daqui:
http://ubuntuforums.org/showthread.php?t=878683