Reimport pymediainfo with its correct license

The mediainfoWrapper.py file was taken from
https://github.com/sbraz/pymediainfo/blob/a24c4b79c5/pymediainfo/__init__.py
and slightly modified.

It is licensed undre MIT but the license information was not copied.
Instead it was relicensed as GPLv2 with OpenLP's default copyright.

This is the original version.

openlp/core/ui/media/vendor/mediainfoWrapper.py

@@ -1,34 +1,37 @@
-# -*- coding: utf-8 -*-
+# The MIT License
-# vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4
+#
+# Copyright (c) 2010-2014, Patrick Altman <paltman@gmail.com>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# http://www.opensource.org/licenses/mit-license.php
 
-###############################################################################
-# OpenLP - Open Source Lyrics Projection                                      #
-# --------------------------------------------------------------------------- #
-# Copyright (c) 2008-2018 OpenLP Developers                                   #
-# --------------------------------------------------------------------------- #
-# This program is free software; you can redistribute it and/or modify it     #
-# under the terms of the GNU General Public License as published by the Free  #
-# Software Foundation; version 2 of the License.                              #
-#                                                                             #
-# This program is distributed in the hope that it will be useful, but WITHOUT #
-# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or       #
-# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for    #
-# more details.                                                               #
-#                                                                             #
-# You should have received a copy of the GNU General Public License along     #
-# with this program; if not, write to the Free Software Foundation, Inc., 59  #
-# Temple Place, Suite 330, Boston, MA 02111-1307 USA                          #
-###############################################################################
-"""
-The :mod:`~openlp.core.ui.media.mediainfo` module contains code to run mediainfo on a media file and obtain
-information related to the rwquested media.
-"""
 import json
 import os
-from subprocess import check_output
+from subprocess import Popen
+from tempfile import mkstemp
 
+import six
 from bs4 import BeautifulSoup, NavigableString
 
+__version__ = '1.4.1'
+
 ENV_DICT = os.environ
 
 
@@ -74,23 +77,27 @@ class Track(object):
                         pass
 
     def __repr__(self):
-        return "<Track track_id='{0}', track_type='{1}'>".format(self.track_id, self.track_type)
+        return("<Track track_id='{0}', track_type='{1}'>".format(self.track_id, self.track_type))
 
     def to_data(self):
         data = {}
-        for k, v in self.__dict__.items():
+        for k, v in six.iteritems(self.__dict__):
             if k != 'xml_dom_fragment':
                 data[k] = v
         return data
 
 
-class MediaInfoWrapper(object):
+class MediaInfo(object):
 
     def __init__(self, xml):
         self.xml_dom = xml
-        xml_types = (str,)     # no unicode type in python3
+        if six.PY3:
+            xml_types = (str,)     # no unicode type in python3
+        else:
+            xml_types = (str, unicode)
+
         if isinstance(xml, xml_types):
-            self.xml_dom = MediaInfoWrapper.parse_xml_data_into_dom(xml)
+            self.xml_dom = MediaInfo.parse_xml_data_into_dom(xml)
 
     @staticmethod
     def parse_xml_data_into_dom(xml_data):
@@ -98,11 +105,21 @@ class MediaInfoWrapper(object):
 
     @staticmethod
     def parse(filename, environment=ENV_DICT):
-        xml = check_output(['mediainfo', '-f', '--Output=XML', '--Inform=OLDXML', filename])
+        command = ["mediainfo", "-f", "--Output=XML", filename]
-        if not xml.startswith(b'<?xml'):
+        fileno_out, fname_out = mkstemp(suffix=".xml", prefix="media-")
-            xml = check_output(['mediainfo', '-f', '--Output=XML', filename])
+        fileno_err, fname_err = mkstemp(suffix=".err", prefix="media-")
-        xml_dom = MediaInfoWrapper.parse_xml_data_into_dom(xml)
+        fp_out = os.fdopen(fileno_out, 'r+b')
-        return MediaInfoWrapper(xml_dom)
+        fp_err = os.fdopen(fileno_err, 'r+b')
+        p = Popen(command, stdout=fp_out, stderr=fp_err, env=environment)
+        p.wait()
+        fp_out.seek(0)
+
+        xml_dom = MediaInfo.parse_xml_data_into_dom(fp_out.read())
+        fp_out.close()
+        fp_err.close()
+        os.unlink(fname_out)
+        os.unlink(fname_err)
+        return MediaInfo(xml_dom)
 
     def _populate_tracks(self):
         if self.xml_dom is None: