[ExtractAudio] Fix conversion to `wav`

Closes #1645

diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 46e87baebf3d45f7e1fa7b25ebd7712ad0645ca6..b2f28d658971f9541ec71346d37244f578bea6f8 100644 (file)
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -403,10 +403,7 @@ def _quality_args(self, codec):
             'aac': (0.1, 4),
             'vorbis': (0, 10),
             'libfdk_aac': (1, 5),
-            'opus': None,  # doesn't support -q:a
-            'wav': None,
-            'flac': None,
-        }[codec]
+        }.get(codec)
         if not limits:
             return []