nginx rtmp conf using argument - nginx

Question

i configure server using nginx - rtmp plugin module.
The Problem is rtmp publish.
rtmp plugin module support "on_publish_done" command.
https://github.com/arut/nginx-rtmp-module/wiki/Directives#on_publish_done
and i want like this.
on_publish_done http://MY_SERVER/$APP/$NAME ;
In nginx configure file(nginx.conf) can use $arg_XXX value.
But my conf-file can not observe value. Observe just string "$arg_app", "$arg_name".
How to observe $arg_app, $arg_name ??
this is my conf file.
# HTTP can be used for accessing RTMP stats
http {
access_log /Users/steve/dev/workspace/nginx/logs/access.log;
server {
listen 8080;
location /local_redirect {
rewrite ^.*$ newname? permanent;
}
location /cast {
# Serve HLS fragments
types {
application/vnd.apple.mpegurl m3u8;
video/mp2t ts;
}
root /Users/steve/dev/workspace/nginx/tmp;
add_header Cache-Control no-cache;
}
}
}
rtmp {
access_log /PATH/nginx/logs/rtmp-access.log;
server {
listen 1935;
chunk_size 4000;
application cast {
live on;
publish_notify on;
hls on;
hls_path /PATH/workspace/nginx/out;
hls_nested on;
hls_fragment 1s;
hls_playlist_length 12s;
}
notify_method get;
on_publish_done http://127.0.0.1:5000/$arg_app/$arg_name ; ##PROBLEM HERE!!
}
}

Answer 1

[the image below shows that a variable with an underscore which is located between character r and b works well! ][1]
for me the code below using bash command with a -c flag works! try it bro
exec_publish_done bash -c "/var/hls/ex.sh ${name}";