A python tool to convert ASF playlists to M3U playlists. Also performs path decoding...

asf_to_m3u.py

import xml.etree.ElementTree as et
from urllib.parse import unquote
import tkinter as tk
from tkinter import filedialog,messagebox

outstr = "#EXTM3U\n"
infile = filedialog.askopenfile(filetypes=(("ASF Playlists","*.asf"),))
f = et.parse(infile).getroot()
count = 0
for i in f.findall("entry"):
    length = 0
    link = unquote(i.find("ref").get("href"))
    try:
        title = i.find("title").text
    except Exception:
        title = ""
    try:
        artist = i.find("author").text
    except Exception:
        artist = ""
    outstr+="#EXTINF:{},{}{}\n{}\n".format(length,artist+" - " if artist else "",title,link)
    count+=1
with filedialog.asksaveasfile(filetypes=(("M3U Playlists","*.m3u"),)) as ofile:
    ofile.write(outstr)
    ofile.close()
    messagebox.showinfo("Done", "Processed {} songs".format(count))