流媒体技术学习笔记之（三）Nginx-Rtmp-Module统计某频道在线观看流的客户数

 获得订阅者人数，可以方便地显示观看流的客户数。

查看已经安装好的模块

/usr/local/nginx/sbin/nginx -V

安装从源编译Nginx和Nginx-RTMP所需的工具

sudo apt-get install build-essential libpcre3 libpcre3-dev libssl-dev

下载Nginx和Nginx-RTMP源码

wget http://nginx.org/download/nginx-1.7.5.tar.gz
wget https://github.com/arut/nginx-rtmp-module/archive/master.zip

提取Nginx和Nginx-RTMP源

tar -zxvf nginx-1.7.5.tar.gz unzip master.zip

切换到Nginx目录

cd nginx-1.7.5

添加Nginx将编译的模块,包括Nginx-RTMP

./configure --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_xslt_module --with-http_flv_module --with-debug --with-http_gzip_static_module --add-module=../nginx-rtmp-module-master

提示错误：

./configure: error: the HTTP XSLT module requires the libxml2/libxslt libraries. You can either do not enable the module or install the libraries.

配置 --with-http_xslt_module 时提示 the HTTP XSLT module requires the libxml2/libxslt libraries：安装一下扩展

sudo apt-get install libxml2 libxml2-dev libxslt-dev

编译和安装Nginx与Nginx-RTMP。

make
sudo make install

安装Nginx初始化脚本

sudo wget https://raw.github.com/JasonGiedymin/nginx-init-ubuntu/master/nginx -O /etc/init.d/nginx
sudo chmod +x /etc/init.d/nginx sudo update-rc.d nginx defaults

启动和停止Nginx生成配置文件

sudo service nginx start
sudo service nginx stop

观看安装是否成功：

/usr/local/nginx/sbin/nginx -V

安装结果

configure arguments: --prefix=/usr/local/nginx --user=www --group=www --with-http_ssl_module --with-http_xslt_module --with-http_flv_module --with-debug --with-http_gzip_static_module --add-module=../nginx-rtmp-module-master

修改Nginx 配置文件添加一下信息，在位置设置统计信息页面

location /stat { rtmp_stat all; allow 127.0.0.1; }

创建一个简单的xsl样式表nclients.xsl提取流用户数

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">

<xsl:output method="html"/>

<xsl:param name="app"/>
<xsl:param name="name"/>

<xsl:template match="/">
    <xsl:value-of select="count(//application[name=$app]/live/stream[name=$name]/client[not(publishing) and flashver])"/>
</xsl:template>

</xsl:stylesheet>

设置一个返回订阅者数量的位置

location /nclients {
    proxy_pass http://127.0.0.1/stat;
    xslt_stylesheet /home/www/nclients.xsl app='$arg_app' name='$arg_name';
    add_header Refresh "3; $request_uri";
}

Nginx.config 完整配置：

user www www; worker_processes 1; error_log logs/error.log debug; #pid        logs/nginx.pid; events { worker_connections 65535; } http { include mime.types; default_type application/octet-stream; log_format main '[$time_local][$remote_addr][$http_x_forwarded_for] $status "$request" "$http_referer" "$http_user_agent"'; access_log logs/access.log main; sendfile on; keepalive_timeout 65; server { set $wwwroot /home/www/node/html; listen 80; server_name localhost; index index.html; root $wwwroot; access_log logs/node.access.log main; error_log logs/error.log debug; location /rtmp/stat { rtmp_stat all; rtmp_stat_stylesheet rtmpstat.xsl; } location /rtmpstat.xsl { } location /rtmp/control { rtmp_control all; }   location /stat { rtmp_stat all; allow 127.0.0.1; } location /nclients { proxy_pass http://127.0.0.1/stat; xslt_stylesheet /home/www/nclients.xsl app='$arg_app' name='$arg_name'; add_header Refresh "3; $request_uri"; } location ~* /hls/.*\.m3u8$ { types { application/vnd.apple.mpegurl m3u8; } root /tmp; add_header Cache-Control no-cache; add_header Access-Control-Allow-Origin *; } location ~* /hls/.*\.ts$ { types { video/mp2t ts; } root /tmp; expires 1m; add_header Cache-Control public; add_header Access-Control-Allow-Origin *; } #error_page  404              /404.html; error_page 500 502 503 504  /50x.html; location = /50x.html { root html; } location / { } } } rtmp { server { listen 1935; chunk_size 4096; application live { live on; record off; 　　} } }

重启Nginx

root@iZ239kcyg8rZ:/usr/local/nginx/conf# service nginx restart * Stopping Nginx Server... [ OK ] * Starting Nginx Server... [ OK ] root@iZ239kcyg8rZ:/usr/local/nginx/conf# 

根据直播频道访问以下地址：

http://你的推流服务器IP/nclients?app=live&name=4001482820358

客户端打开三个播放测试：

打开2个VLC播放流：

 

 查看在线人数：

 

 

 结束。