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-rw-r--r--youtube_dl/YoutubeDL.py7
1 files changed, 6 insertions, 1 deletions
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index bc69214e7..32f21e21a 100644
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -454,7 +454,12 @@ class YoutubeDL(object):
elif format_spec == 'worst':
return available_formats[0]
else:
- matches = list(filter(lambda f:f['format_id'] == format_spec ,available_formats))
+ extensions = [u'mp4', u'flv', u'webm', u'3gp']
+ if format_spec in extensions:
+ filter_f = lambda f: f['ext'] == format_spec
+ else:
+ filter_f = lambda f: f['format_id'] == format_spec
+ matches = list(filter(filter_f ,available_formats))
if matches:
return matches[-1]
return None