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-rw-r--r--youtube_dl/extractor/youtube.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/youtube_dl/extractor/youtube.py b/youtube_dl/extractor/youtube.py
index bdd399d3e..1cd2d40f1 100644
--- a/youtube_dl/extractor/youtube.py
+++ b/youtube_dl/extractor/youtube.py
@@ -777,7 +777,7 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
if m_s is not None:
self.to_screen(u'%s: Encrypted signatures detected.' % video_id)
video_info['url_encoded_fmt_stream_map'] = [args['url_encoded_fmt_stream_map']]
- m_s = re.search(r'[&,]s=', args['adaptive_fmts'] if 'adaptive_fmts' in args else '')
+ m_s = re.search(r'[&,]s=', args.get('adaptive_fmts', u''))
if m_s is not None and 'adaptive_fmts' in args:
video_info['url_encoded_fmt_stream_map'][0] += ','+args['adaptive_fmts']
elif 'adaptive_fmts' in video_info: