check self.info is present

aircox/management/commands/sounds_monitor.py

@@ -188,7 +188,7 @@ class SoundFile:
         elif use_meta:
             if self.info is None:
                 self.read_file_info()
-            if self.info.tags:
+            if self.info and self.info.tags:
                 tags = self.info.tags
                 title, artist, album, year = tuple(
                     t and ', '.join(t) for t in (

aircox/templates/admin/aircox/filters/filter.html

@@ -1,4 +1,4 @@
 {% load i18n %}
-<h3>{{ title }}</h3>
+<h3>{% blocktranslate with filter_title=title %} By {{ filter_title }} {% endblocktranslate %}</h3>
 {% block content %}{% endblock %}