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-rw-r--r--youtube_dl/extractor/common.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index 33290fd74..b3d57dfce 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -828,7 +828,7 @@ class InfoExtractor(object):
for f in formats:
# Automatically determine tbr when missing based on abr and vbr (improves
# formats sorting in some cases)
- if 'tbr' not in f and 'abr' in f and 'vbr' in f:
+ if 'tbr' not in f and f.get('abr') is not None and f.get('vbr') is not None:
f['tbr'] = f['abr'] + f['vbr']
def _formats_key(f):