nginx视频服务器

ningx服务器的 nginx-rtmp-module模块很强大，可以支持rtmp,
HLS以及MPEG DASH。今天在我的centos 7上用nginx搭建了一个简单的视频服务器

首先，是下载以及编译nginx.

nginx官网(https://nginx.org/en/download.html )可以下载nginx的各种版本，但貌似里面并没有rtmp模块

所以，需要自己下载源代码编译。

1.下载nginx

hg clone http://hg.nginx.org/nginx
2.下载 nginx-rtmp-module

git clone https://github.com/arut/nginx-rtmp-module.git
3. 安装编译依赖的库文件

yum install gc gcc gcc-c++ pcre-devel zlib-devel make wget openssl-devel libxml2-devel libxslt-devel gd-devel perl-ExtUtils-Embed GeoIP-devel gperftools gperftools-devel libatomic_ops-devel perl-ExtUtils-Embed

4. cd到nginx源码目录，将auto目录下的configure文件copy到nignx源码根目录。然后执行一下命令

./configure --add-module=/usr/build/nginx-rtmp-module --with-http_ssl_module
make
make install

此时，nginx默认被安装到/usr/local/nginx目录，把目录/usr/local/nginx/sbin/添加到环境变量。

用nginx命令即可启动服务器，用nginx -s stop关闭服务器

然后，配置nginx服务器

修改/usr/local/nginx/conf/下的nginx.conf文件为

#user  nobody;
worker_processes  1;

error_log  logs/error.log debug;

events {
worker_connections  1024;
}

http {
include       mime.types;
default_type  application/octet-stream;

sendfile        on;
keepalive_timeout  65;

server {
listen       8080;
server_name  localhost;

# sample handlers
#location /on_play {
#    if ($arg_pageUrl ~* localhost) {
#        return 201;
#    }
#    return 202;
#}
#location /on_publish {
#    return 201;
#}

#location /vod {
#    alias /var/myvideos;
#}

# rtmp stat
location /stat {
rtmp_stat all;
rtmp_stat_stylesheet stat.xsl;
}
location /stat.xsl {
# you can move stat.xsl to a different location
root /usr/build/nginx-rtmp-module;
}

# rtmp control
location /control {
rtmp_control all;
}

error_page   500 502 503 504  /50x.html;
location = /50x.html {
root   html;
}
}
}

rtmp {
server {
listen 1935;
ping 30s;
notify_method get;

application myapp {
live on;

# sample play/publish handlers
#on_play http://localhost:8080/on_play; #on_publish http://localhost:8080/on_publish; 
# sample recorder
#recorder rec1 {
#    record all;
#    record_interval 30s;
#    record_path /tmp;
#    record_unique on;
#}

# sample HLS
#hls on;
#hls_path /tmp/hls;
#hls_sync 100ms;
}

# Video on demand
#application vod {
#    play /var/Videos;
#}

# Video on demand over HTTP
#application vod_http {
#    play http://localhost:8080/vod/; #}
}
}

此时如果配置正确，打开http://localhost:8080/stat可以看到rtmp的统计信息

最后，用ffmpeg串流到刚刚配置的rtmp://localhost/myapp/mystream

需要注意的是，目前服务器只支持有限的音视频编码格式，如H264, AAC, MP3等。

ffmpeg -re -i test.mp4 -c:v libx264 -c:a libfaac -ar 44100 -ac 1 -f flv rtmp://localhost/myapp/mystream

此时，浏览器打开http://localhost:8080/stat能看到信息的变化。
也可以用播放器进行播放，例如

ffplay rtmp://localhost/myapp/mystream