Infer acodec for single-codec containers

yt-dlp · Mar 31, 2024 · 86a9720 · 86a9720
1 parent 50c2935
commit 86a9720
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Showing 2 changed files with 5 additions and 2 deletions.
diff --git a/test/test_YoutubeDL.py b/test/test_YoutubeDL.py
@@ -183,7 +183,7 @@ def test_format_selection_audio_exts(self):
         ]
 
         info_dict = _make_result(formats)
-        ydl = YDL({'format': 'best'})
+        ydl = YDL({'format': 'best', 'format_sort': ['abr', 'ext']})
         ydl.sort_formats(info_dict)
         ydl.process_ie_result(copy.deepcopy(info_dict))
         downloaded = ydl.downloaded_info_dicts[0]
@@ -195,7 +195,7 @@ def test_format_selection_audio_exts(self):
         downloaded = ydl.downloaded_info_dicts[0]
         self.assertEqual(downloaded['format_id'], 'mp3-64')
 
-        ydl = YDL({'prefer_free_formats': True})
+        ydl = YDL({'prefer_free_formats': True, 'format_sort': ['abr', 'ext']})
         ydl.sort_formats(info_dict)
         ydl.process_ie_result(copy.deepcopy(info_dict))
         downloaded = ydl.downloaded_info_dicts[0]

diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
@@ -2813,6 +2813,9 @@ def is_wellformed(f):
             format['url'] = sanitize_url(format['url'])
             if format.get('ext') is None:
                 format['ext'] = determine_ext(format['url']).lower()
+            if format['ext'] in ('aac', 'opus', 'mp3', 'flac', 'vorbis'):
+                if format.get('acodec') is None:
+                    format['acodec'] = format['ext']
             if format.get('protocol') is None:
                 format['protocol'] = determine_protocol(format)
             if format.get('resolution') is None: