Ratnakar said almost 2 years ago on Adaptive Bitrate Streaming with Active Storage :
Mine is ffmpeg version 5.0 and I am running it on mac M1

Its when transcoding the file, I guess its with this line -c:a aac

ffmpeg -hide_banner -y -i tmp/videos/$1.mp4 \-hls_base_url "$2/users/" \-threads 1\-c:a aac -ar 48000 -c:v h264 -profile:v main -crf 20 -sc_threshold 0 -hls_time 4 -hls_playlist_type vod -vf scale=w=640:h=360:force_original_aspect_ratio=decrease \-b:v 800k -maxrate 700000 -bufsize 700000 -b:a 96k \-hls_segment_filename tmp/videos/$1/$1_360p_%03d.ts \tmp/videos/$1/$1_360p.m3u8 \