user www-data; # Only used on linux. Nginx will run under this username.
worker_processes 1; # Set this to how many processors/cores the CPU has. Relates to "worker_connections".
pid /run/nginx.pid; # Sets the location of the process id file (used on linux only).
include /etc/nginx/modules-enabled/*.conf;	# Include all the optional configuration files stored in this folder.

events {
worker_connections 768; # Worker_processes * worker_connections = max clients. So in this setup: 1 * 768 = 768 max clients.
# multi_accept on; # "Off" will accept 1 new connection at a time. "On" will accept all new connections. Default is off.
}

rtmp {
server {
listen 1935; # The RTMP listening port. Open it in your router/firewall. Options: (addr[:port]|port|unix:path) [bind] [ipv6only=on|off] [so_keepalive=on|off|keepidle:keepintvl:keepcnt|proxy_protocol]

application live {	# Name it whatever you prefer. You will need at least one application, you can have many more.
live on; # on|off. Enables this application and allowing live streaming to it. Default=on.
           
## TRANSCODING USING FFMPEG EXEC ##
## The following lines will take our incoming RTMP stream and transcode it to several different HLS streams with variable bitrates  ##
## Once receive stream, transcode for adaptive streaming. This single ffmpeg command takes the input and transforms the source into ##
## 4 or 5 different streams with different bitrate and quality. P.S. The scaling done here respects the aspect ratio of the input.  ##
## EXEC - Many things are possible using exec. To learn more visit https://github.com/arut/nginx-rtmp-module/wiki/Directives#exec   ##

exec ffmpeg -i rtmp://localhost/$app/$name -async 1 -vsync -1
-c:v libx264 -c:a libvo_aacenc -b:v 256k -b:a 32k -vf "scale=480:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hls/$name_low
-c:v libx264 -c:a libvo_aacenc -b:v 768k -b:a 96k -vf "scale=720:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hls/$name_mid
-c:v libx264 -c:a libvo_aacenc -b:v 1024k -b:a 128k -vf "scale=960:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hls/$name_high
-c:v libx264 -c:a libvo_aacenc -b:v 1920k -b:a 128k -vf "scale=1280:trunc(ow/a/2)*2" -tune zerolatency -preset veryfast -crf 23 -f flv rtmp://localhost/hls/$name_higher
-c copy -f flv rtmp://localhost/hls/$name_src;
}

application hls { # This application is for splitting the stream into HLS fragments
live on; # on|off. Enables this application and allowing live streaming to it. Default=on.
hls on; # on|off. Toggles HLS on or off for this application. Enables HTTP Live Streaming.
hls_path /tmp/hls;	# Location to store the video fragment files. Will be created if it doesn't exist.
            
## HLS_VARIANT - Used for variable bitrate streaming. Please read: https://github.com/arut/nginx-rtmp-module/wiki/Directives#hls_variant ##
## When hls_variant suffix is matched on stream name then variant playlist is created for the current stream with all entries specified by hls_variant
## directives in current application. Stripped name without suffix is used as variant stream name. The original stream is processed as usual.
## Optional parameters following the suffix are appended to EXT-X-STREAM-INF in m3u8 playlist. See HLS spec 3.3.10. EXT-X-STREAM-INF for full list.

hls_variant _low	BANDWIDTH=288000;	# Low bitrate, sub-SD resolution
hls_variant _mid	BANDWIDTH=448000;	# Medium bitrate, SD resolution
hls_variant _high	BANDWIDTH=1152000;	# Higher-than-SD resolution 
hls_variant _higher	BANDWIDTH=2048000;	# High bitrate, HD 720p resolution
hls_variant _src	BANDWIDTH=4096000;	# Source bitrate, source resolution
		}
	}
}

http {
sendfile off; # on|off. Toggles the use of sendfile. Default=off. For optimal HLS delivery disable this.
tcp_nodelay on; # on|off. Forces a socket to send the data in its buffer, whatever the packet size. Default=on.
tcp_nopush on; # on|off. Sends the response header and beginning of a file in one packet. Default=off.
server_tokens off; # on|off|build. Toggles showing nginx version in the response header field. Default=on.
default_type application/octet-stream;	# Emit this MIME type for all requests.
	
server {
listen 80;
gzip off;

server_name localhost;
index index.html index.htm index.nginx-debian.html;
			
location / {
root /var/www/html/;
add_header Strict-Transport-Security "max-age=63072000;";
}
			
location /hls {
expires -1;
autoindex on;

types {
application/vnd.apple.mpegurl m3u8;
text/html html;
}
# root /tmp/;
alias /tmp/hls;

add_header Cache-Control no-cache;		# Prevent caching of HLS fragments
add_header Access-Control-Allow-Origin *;	# Allow web player to access our playlist
		}
	}
}