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-rwxr-xr-xyoutube_dl/YoutubeDL.py4
1 files changed, 2 insertions, 2 deletions
diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index e844dc98a..0b3e3da82 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1299,7 +1299,7 @@ class YoutubeDL(object):
for subtitle_format in subtitle:
if subtitle_format.get('url'):
subtitle_format['url'] = sanitize_url(subtitle_format['url'])
- if 'ext' not in subtitle_format:
+ if subtitle_format.get('ext') is None:
subtitle_format['ext'] = determine_ext(subtitle_format['url']).lower()
if self.params.get('listsubtitles', False):
@@ -1354,7 +1354,7 @@ class YoutubeDL(object):
note=' ({0})'.format(format['format_note']) if format.get('format_note') is not None else '',
)
# Automatically determine file extension if missing
- if 'ext' not in format:
+ if format.get('ext') is None:
format['ext'] = determine_ext(format['url']).lower()
# Automatically determine protocol if missing (useful for format
# selection purposes)