[utils] Recognize wav mimetype (closes #26463)

test/test_utils.py

@@ -803,6 +803,8 @@ class TestUtil(unittest.TestCase):
         self.assertEqual(mimetype2ext('text/vtt'), 'vtt')
         self.assertEqual(mimetype2ext('text/vtt;charset=utf-8'), 'vtt')
         self.assertEqual(mimetype2ext('text/html; charset=utf-8'), 'html')
+        self.assertEqual(mimetype2ext('audio/x-wav'), 'wav')
+        self.assertEqual(mimetype2ext('audio/x-wav;codec=pcm'), 'wav')
 
     def test_month_by_name(self):
         self.assertEqual(month_by_name(None), None)

youtube_dl/utils.py

@@ -4198,6 +4198,7 @@ def mimetype2ext(mt):
         'vnd.ms-sstr+xml': 'ism',
         'quicktime': 'mov',
         'mp2t': 'ts',
+        'x-wav': 'wav',
     }.get(res, res)