X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;ds=sidebyside;f=youtube_dl%2Futils.py;h=e40b367c255719046bf2d5dd2fd63bc6bb2e4d8a;hb=a91cf277672318e942af891d6c962c053abda45d;hp=0d0bbe8f66e67e35eb732349e6cfd374a3bbd2b5;hpb=cbf915f3f63a85e090d561fe4de218b55cb7fa59;p=youtube-dl

diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 0d0bbe8f6..e40b367c2 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -852,6 +852,8 @@ def unified_strdate(date_str):
     return upload_date
 
 def determine_ext(url, default_ext=u'unknown_video'):
+    if url is None:
+        return default_ext
     guess = url.partition(u'?')[0].rpartition(u'.')[2]
     if re.match(r'^[A-Za-z0-9]+$', guess):
         return guess