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-rw-r--r--youtube_dl/utils.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/youtube_dl/utils.py b/youtube_dl/utils.py
index 89234b39d..229de4b39 100644
--- a/youtube_dl/utils.py
+++ b/youtube_dl/utils.py
@@ -2020,6 +2020,9 @@ def mimetype2ext(mt):
ext = {
'audio/mp4': 'm4a',
+ # Per RFC 3003, audio/mpeg can be .mp1, .mp2 or .mp3. Here use .mp3 as
+ # it's the most popular one
+ 'audio/mpeg': 'mp3',
}.get(mt)
if ext is not None:
return ext