CC-5276: Adding watched folder throws exception sometimes

Fixed by only converting length format if it is not already in the correct format

python_apps/media-monitor2/media/monitor/pure.py

@@ -474,6 +474,7 @@ def truncate_to_value(item, value):
     return str(item)
 
 def format_length(mutagen_length):
+    if convert_format(mutagen_length):
         """ Convert mutagen length to airtime length """
         t = float(mutagen_length)
         h = int(math.floor(t / 3600))
@@ -489,6 +490,13 @@ def format_length(mutagen_length):
         else: ss = seconds[1][0:]
         return "%s:%s:%s.%s" % (h, m, s, ss)
 
+def convert_format(value):
+    regCompiled = re.compile("^[0-9][0-9]:[0-9][0-9]:[0-9][0-9](\.\d+)?$")
+    if re.search(regCompiled, str(value)) is None:
+        return True
+    else:
+        return False
+
 if __name__ == '__main__':
     import doctest
     doctest.testmod()