return default_ext
-def subtitles_filename(filename, sub_lang, sub_format):
- return filename.rsplit('.', 1)[0] + '.' + sub_lang + '.' + sub_format
+def subtitles_filename(filename, sub_lang, sub_format, expected_real_ext=None):
+ return replace_extension(filename, sub_lang + '.' + sub_format, expected_real_ext)
def date_from_str(date_str):