[FixupM3u8] Do not run if merge is needed

We pass the relevant arguments to the merger, so separate fixup in redundant

yt_dlp/YoutubeDL.py

@@ -2820,7 +2820,8 @@ class YoutubeDL(object):
 
                     downloader = (get_suitable_downloader(info_dict, self.params).__name__
                                   if 'protocol' in info_dict else None)
-                    ffmpeg_fixup(downloader == 'HlsFD', 'malformed AAC bitstream detected', FFmpegFixupM3u8PP)
+                    ffmpeg_fixup(info_dict.get('requested_formats') is None and downloader == 'HlsFD',
+                                 'malformed AAC bitstream detected', FFmpegFixupM3u8PP)
                     ffmpeg_fixup(downloader == 'WebSocketFragmentFD', 'malformed timestamps detected', FFmpegFixupTimestampPP)
                     ffmpeg_fixup(downloader == 'WebSocketFragmentFD', 'malformed duration detected', FFmpegFixupDurationPP)