这两天为了利用云服务器实现 Nginx 进行OBS Rtmp推流，Flv拉流时发生了诸多情况，记录实现过程。
环境
- OS：阿里云CentOS 7.9 64位
- Nginx：nginx-1.28.0
- Nginx-http-flv-module：nginx-http-flv-module-1.2.12
安装Nginx编译的依赖包：
yum install -y gcc gcc-c++ autoconf automake make
yum install zlib zlib-devel openssl openssl-devel pcre pcre-devel wget httpd-tools vim -y
Nginx配置
2.1 获取nginx源码
wget http://nginx.org/download/nginx-1.28.0.tar.gz
2.2 解压
tar -xzvf nginx-1.28.0.tar.gz
2.3 重命名
mv nginx-1.28.0 nginx
2.4 移动到/usr/local/
mv nginx/ usr/local/
Nginx-http-flv-module配置
3.1 在/usr/local/nginx中下载
wget https://github.com/winshining/nginx-http-flv-module/archive/refs/tags/v1.2.12.tar.gz
3.2 解压
tar -xzvf v1.2.12.tar.gz
3.3 关闭防火墙
systemctl disable --now firewalld
setenforce 0
getenforce
3.4 配置nginx编译环境
./configure --prefix=/usr/local/nginx --add-module=/usr/local/nginx/nginx-http-flv-module-1.2.12
3.5编译&安装
make
make install
3.6设置Nginx环境变量
vi /etc/profile # vi 打开环境变量文件
export PATH=$PATH:/usr/local/nginx/sbin # 添加到文件最后一行
source /etc/profile # 立即生效
修改Nginx配置文件
4.1 将下方文本替换/usr/local/nginx/conf/nginx.conf的内容：
#user nobody;
worker_processes 1;
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
#pid logs/nginx.pid;
events {
worker_connections 1024;
}
rtmp_auto_push on;
rtmp_auto_push_reconnect 1s;
rtmp_socket_dir /tmp;
rtmp {
out_queue 4096;
out_cork 8;
max_streams 128;
timeout 15s;
drop_idle_publisher 15s;
log_interval 5s; #log模块在access.log中记录日志的间隔时间，对调试非常有用
log_size 1m; #log模块用来记录日志的缓冲区大小
server {
listen 1935;
#ffmpeg推流的application
application app {
live on;
allow publish all;
allow play all;
record off;
meta copy;
gop_cache on; #打开GOP缓存，减少首屏等待时间
}
}
}
http {
include mime.types;
default_type application/octet-stream;
#log_format main '$remote_addr - $remote_user [$time_local] "$request" '
# '$status $body_bytes_sent "$http_referer" '
# '"$http_user_agent" "$http_x_forwarded_for"';
#access_log logs/access.log main;
sendfile on;
#tcp_nopush on;
#keepalive_timeout 0;
keepalive_timeout 65;
#gzip on;
server {
listen 80; # http-flv 拉流端口
#server_name localhost;
location /live {
flv_live on; #打开HTTP播放FLV直播流功能
chunked_transfer_encoding on; #支持'Transfer-Encoding: chunked'方式回复
add_header 'Access-Control-Allow-Origin' '*'; #添加额外的HTTP头
add_header 'Access-Control-Allow-Credentials' 'true'; #添加额外的HTTP头
}
#charset koi8-r;
#access_log logs/host.access.log main;
location / {
root html;
index index.html index.htm;
}
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root html;
}
# proxy the PHP scripts to Apache listening on 127.0.0.1:80
#
#location ~ \.php$ {
# proxy_pass http://127.0.0.1;
#}
# pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
#
#location ~ \.php$ {
# root html;
# fastcgi_pass 127.0.0.1:9000;
# fastcgi_index index.php;
# fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name;
# include fastcgi_params;
#}
# deny access to .htaccess files, if Apache's document root
# concurs with nginx's one
#
#location ~ /\.ht {
# deny all;
#}
}
# another virtual host using mix of IP-, name-, and port-based configuration
#
#server {
# listen 8000;
# listen somename:8080;
# server_name somename alias another.alias;
# location / {
# root html;
# index index.html index.htm;
# }
#}
# HTTPS server
#
#server {
# listen 443 ssl;
# server_name localhost;
# ssl_certificate cert.pem;
# ssl_certificate_key cert.key;
# ssl_session_cache shared:SSL:1m;
# ssl_session_timeout 5m;
# ssl_ciphers HIGH:!aNULL:!MD5;
# ssl_prefer_server_ciphers on;
# location / {
# root html;
# index index.html index.htm;
# }
#}
}
4.2 新建/usr/local/nginx/logs文件夹存放日志
sudo mkdir -p /usr/local/nginx/logs # sudo 是使用root权限创建
4.3 测试配置文件是否问题
/usr/local/nginx/sbin/nginx -t
4.4 运行Nginx
nginx
4.5 查看端口，如果1935 & 80端口正在监听就表明完成了
netstat -tulnp # 查看所有端口 加上 | grep x 可以过滤出端口x的情况
5.OBS推流
rtmp://${服务器公网地址}:1935/app/room-1
使用obs进行推流，其中推流地址和推流码为：
6.使用VLC进行拉流
6.1 rtmp拉流地址为：rtmp://${服务器公网地址}:80/app/room-1
6.2 flv 拉流地址为：http://${服务器公网地址}:80/live?port=1935&app=app&stream=room-1
flv拉流地址，其中
live的是配置文件中的http模块设置的、port的值应该是推流端口、app的值是配置文件中rtmp模块自定义的名称、stream的值是OBS推流自定义的推流码。
效果：
（ 延迟大概15s ）
7. 参考
- 使用Nginx搭建流媒体服务器
- nginx+ffmpeg推流环境搭建
- CentOS7安装 FFmpeg
