All files have at least one track.

diff --git a/flac2mp3 b/flac2mp3
index 5ebc873..1f97446 100755 (executable)
--- a/flac2mp3
+++ b/flac2mp3
@@ -153,7 +153,8 @@ class Tags(object):
         self._global = {}
         self._tags = {}
     def __len__(self):
-        return len(self._tags)
+        # All files have at least one track.
+        return max(1, len(self._tags))
     def get(self, key, track=None):
         key = key.upper()
         try: