nginx rtmp HLS直播

2、安裝Nginx相關模塊

1.環境準備

yum install –y pcre pcre-devel

yum install –y zlib zlib-devel

yum -y install openssl openssl-devel

2.下載nginx及rtmp模塊

wget http://nginx.org/download/nginx-1.6.2.tar.gz

tar xzvf nginx_1.6.2.tar.gz

git clone git://github.com/arut/nginx-rtmp-module.git

3.編譯nginx-rtmp

./configure --prefix=/usr/local/nginx --add-module=../nginx-rtmp-module --with-http_stub_status_module

若是須要安裝pcre，則 yum -y install pcre-devel openssl openssl-devel

make

make install

安裝完成後，nginx位於/usr/local/nginx/sbin目錄下，配置文件nginx.conf在/usr/local/nginx/conf目錄下

++++++++測試nginx是否安裝正確+++++++++++

#cd /usr/local/nginx

#./sbin/nginx -c ./conf/nginx.conf

打開網頁http://localhost，若是顯示Welcome表示安裝下正確，若是沒有顯示，請查看一下nginx的日誌。

++++++++測試RTMP+++++++++++

修改/usr/local/nginx/conf/nginx.conf的內容以下：

#debug
daemon off;
master_process off;

error_log ./error.log debug;
events{
    worker_connections 1024;
}

rtmp{
    server {
        listen 1935;
        chunk_size 4000;

        #live
        application myapp {
            live on;
      }

}

從網上下載一款RTMP推流工具，我使用的OBS（Open Broadcaster Software），開始推流rtmp://your_ip/myapp/test，使用播放器（http://www.cutv.com/demo/live_test.swf）查看是否正常。

++++++++測試HLS切片功能+++++++++++

修改/usr/local/nginx/conf/nginx.conf的內容以下：

#debug
daemon off;
master_process off;

error_log ./error.log debug;
events{
    worker_connections 1024;
}

rtmp{
    server {
        listen 1935;
        chunk_size 4000;

        #live
        application myapp {
            live on;
 
            hls on;
            hls_path /tmp/hls;
            hls_fragment 2s;
            hls_playlist_length 6s;

       }
    }
}

#HTTP
http{
    server {
        listen 80;

        #welcome
        location / {
            root   html;
            index  index.html index.htm;
        }

        #hls
        location /hls {
            types {
                application/vnd.apple.mpegusr m3u8;
                video/mp2t ts;
            }
            root /tmp;
            add_header Cache-Control no-cache;
        }  
    }
}

使用VLC或iPAD上的播放器進行查看 http://yourip/hls/test.m3u8。

++++++++測試FFMPEG轉碼功能+++++++++++

修改/usr/local/nginx/conf/nginx.conf的內容以下：

#debug
daemon off;
master_process off;

error_log ./error.log debug;
events{
    worker_connections 1024;
}

rtmp{
    server {
        listen 1935;
        chunk_size 4000;

        #live
        application myapp {
            live on;
 
           exec /opt/ffmpeg/bin/ffmpeg -i rtmp://localhost/myapp/$name
             -c:a copy  -c:v libx264 -b:v 512K -g 30 -f flv rtmp://localhost/hls/$name_low;
        }
      
        application hls {

            live on;

            hls on;
            hls_path /tmp/hls;
            hls_nested on;
            hls_fragment 2s;
            hls_playlist_length 6s;

           hls_variant _hi  BANDWIDTH=640000;

        }
    }
}

#HTTP
http{
    server {
        listen 80;

        #welcome
        location / {
            root   html;
            index  index.html index.htm;
        }

        #hls
        location /hls {
            types {
                application/vnd.apple.mpegusr m3u8;
                video/mp2t ts;
            }
            root /tmp;
            add_header Cache-Control no-cache;
        }  
    }
}

使用ffmpeg轉碼時，

exec /opt/ffmpeg/bin/ffmpeg -i rtmp://localhost/myapp/$name
             -c:a copy  -c:v libx264 -b:v 512K -g 30 -f flv rtmp://localhost/hls/$name_low;

僅對視頻進行轉碼，音頻不作處理，同時向流從myapp轉推到hls， hls_variant會生成一個多碼率的m3u8文件，同時把切片文件存放到test_low目錄下，訪問多碼率時，直接訪問http://yourip/hls/test.m3u8，根據這個m3u8中的實現的內容訪問相應的碼流，在本例中，實際碼流URL爲http://yourip/hls/test_low/index.m3u8