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-rw-r--r--yt_dlp/extractor/common.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/yt_dlp/extractor/common.py b/yt_dlp/extractor/common.py
index 2e4f3559a..64ab8f706 100644
--- a/yt_dlp/extractor/common.py
+++ b/yt_dlp/extractor/common.py
@@ -2876,7 +2876,7 @@ class InfoExtractor(object):
stream_name = stream.get('Name')
stream_language = stream.get('Language', 'und')
for track in stream.findall('QualityLevel'):
- fourcc = track.get('FourCC', 'AACL' if track.get('AudioTag') == '255' else None)
+ fourcc = track.get('FourCC') or ('AACL' if track.get('AudioTag') == '255' else None)
# TODO: add support for WVC1 and WMAP
if fourcc not in ('H264', 'AVC1', 'AACL', 'TTML'):
self.report_warning('%s is not a supported codec' % fourcc)