diff --git a/yt_dlp/postprocessor/ffmpeg.py b/yt_dlp/postprocessor/ffmpeg.py
index 63fc9ace65..323f4303c0 100644
--- a/yt_dlp/postprocessor/ffmpeg.py
+++ b/yt_dlp/postprocessor/ffmpeg.py
@@ -898,8 +898,11 @@ def _needs_fixup(self, info):
     @PostProcessor._restrict_to(images=False)
     def run(self, info):
         if all(self._needs_fixup(info)):
+            args = ['-f', 'mp4']
+            if self.get_audio_codec(info['filepath']) == 'aac':
+                args.extend(['-bsf:a', 'aac_adtstoasc'])
             self._fixup('Fixing MPEG-TS in MP4 container', info['filepath'], [
-                *self.stream_copy_opts(), '-f', 'mp4', '-bsf:a', 'aac_adtstoasc'])
+                *self.stream_copy_opts(), *args])
         return [], info