Reducing outbound transfer in nginx rtmp server - nginx

Question

I have a nginx-rtmp server for real time hls streaming with three rtmp stream running. Right now all the hls are streaming are at 3-4mbps, is there any i can restrict the outbound data transfer rate to 1-2mpbs using directives in nginx.
rtmp {
server {
listen 1935;
chunk_size 4096;
application live {
notify_method get;
live on;
hls on;
hls_path /nginx/hls/;
hls_fragment 3;
hls_playlist_length 60;
drop_idle_publisher 10s;
meta copy;
hls_variant _low BANDWIDTH=166000;
hls_variant _mid BANDWIDTH=244000;
}
}
}
http {
sendfile off;
tcp_nopush on;
directio 512;
default_type application/octet-stream;
server {
listen 8080;
location / {
add_header 'Cache-Control' 'no-cache';
add_header 'Access-Control-Allow-Origin' '*' always;
add_header 'Access-Control-Expose-Headers' 'Content-Length';
add_header 'Access-Control-Allow-Credentials' 'true';
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
if ($request_method = 'OPTIONS') {
add_header 'Access-Control-Max-Age' 1728000;
add_header 'Content-Type' 'text/plain charset=UTF-8';
add_header 'Content-Length' 0;
return 204;
}
types {
application/vnd.apple.mpegurl m3u8;
video/mp2t ts;
}
root /nginx/hls/;
#root /nginx/;
}
}
}
Thanks in advance