# uname -sr
FreeBSD 11.2-RELEASE-p5
# pkg info | grep zoneminder
zoneminder-1.32.3              Complete security camera solution, fully web based with image analysis
# pkg info | grep nginx
nginx-1.14.2_8,2               Robust and small WWW server
# pkg info | grep mysql
mysql56-server-5.6.43          Multithreaded SQL database (server)
# pkg info | grep fcgiwrap
fcgiwrap-1.1.0_9               Simple FastCGI wrapper for CGI scripts
# pkg info | grep php
php72-7.2.15                   PHP Scripting Language

# cd /usr/ports/multimedia/zoneminder
# make install clean

[ ] DOCS  Build and/or install documentation
[x] NLS   Native Language Support
[x] V4L   Video 4 Linux support

server {
...
    # ZONEMINDER
    location ~ /cgi-bin/nph-zms {
        gzip off;
        root /usr/local/www/zoneminder;
        fastcgi_param DOCUMENT_ROOT /usr/local/www/zoneminder;
        include /usr/local/etc/nginx/fastcgi_params;
        fastcgi_pass 127.0.0.1:8999;
        fastcgi_param SCRIPT_FILENAME $request_filename;
    }
    location /zm/cache {
        alias /var/cache/zoneminder;
    }
    location /zm {
        alias   /usr/local/www/zoneminder;
        index index.php;
        location ~ \.php$ {
            if (!-f $request_filename) { return 404; }
            include fastcgi_params;
            fastcgi_param SCRIPT_FILENAME $request_filename;
            fastcgi_index index.php;
            fastcgi_pass unix:/tmp/www-php-fpm.sock;
        }
        location ~ \.(jpg|jpeg|gif|png|ico)$ {
            access_log      off;
            expires 33d;
        }
        location /zm/api/ {
            alias   /usr/local/www/zoneminder;
            rewrite ^/zm/api(.+)$ /zm/api/app/webroot/index.php?p=$1 last;
        }
    }
    #/ZONEMINDER
...
}