@ -492,7 +492,8 @@ class YoutubeDL(object):
# that way it will silently go on when used with unsupporting IE
subtitles = info_dict['subtitles']
sub_format = self.params.get('subtitlesformat')
for sub_lang in subtitles.keys():
for sub_lang in subtitles:
sub = subtitles[sub_lang]
if sub is None:
continue