Python script to convert a M3U into the XML format that Brasero uses for its project files, so that one can burn a playlist to a data CD. YMMV.

m3u_to_brasero.py

#!/usr/bin/env python3

import argparse
import os
import sys
import urllib.parse as url
import xml.etree.ElementTree as ET

def main():
    ap = argparse.ArgumentParser(description="Convert an M3U file to a Brasero "
        "data disc project file.")
    ap.add_argument('-l', '--label', default="Data disc", help="Disc label")
    ap.add_argument('-b', '--basedir', default=os.getcwd(), help="Base "
        "directory, relative to which are the paths to the files listed in the "
        "playlist file.")
    ap.add_argument('m3u', type=argparse.FileType('r'), help="Playlist file")
    args = ap.parse_args()

    root = ET.Element('braseroproject')
    version = ET.Element('version')
    version.text = '0.2'
    label = ET.Element('label')
    label.text = args.label
    root.append(version)
    root.append(label)
    tracklist = ET.Element('track')
    datalist = ET.Element('data')
    excludes = []
    for line in args.m3u:
        path = ET.Element('path')
        path.text = '/' + line.strip()
        uri = ET.Element('uri')
        uri.text = url.quote('file://'+os.path.join(args.basedir, path.text))
        graft = ET.Element('graft')
        graft.append(path)
        graft.append(uri)
        datalist.append(graft)
        excluded = ET.Element('excluded')
        excluded.text = uri.text
        excludes.append(excluded)
    for exclude in excludes:
        datalist.append(exclude)
    tracklist.append(datalist)
    root.append(tracklist)

    # Print it all out
    print('<?xml version="1.0" encoding="UTF-8"?>')
    print(ET.tostring(root).decode('utf-8'))

if __name__ == '__main__':
    main()