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-rw-r--r--youtube_dl/YoutubeDL.py4
1 files changed, 1 insertions, 3 deletions
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index e24706115..cc5f76157 100644
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -530,9 +530,7 @@ class YoutubeDL(object):
if self.params.get('writethumbnail', False):
if 'thumbnail' in info_dict:
- thumb_format = info_dict['thumbnail'].rpartition(u'/')[2].rpartition(u'.')[2]
- if not thumb_format:
- thumb_format = 'jpg'
+ thumb_format = determine_ext(info_dict['thumbnail'], u'jpg')
thumb_filename = filename.rpartition('.')[0] + u'.' + thumb_format
self.to_screen(u'[%s] %s: Downloading thumbnail ...' %
(info_dict['extractor'], info_dict['id']))