Infer `acodec` for single-codec containers

[yt-dlp.git] / yt_dlp / YoutubeDL.py

diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index e3d1db3761e84c3dc5bd8b2bbe0af6b431f88911..56366760019dc394159ebf54a93e69bd07e86577 100644 (file)
--- 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: