搭建dash直播

搭建dash直播和hls直播差不多, 都是用nginx和nginx-rtmp-module, 下面提供路径.

• nginx, 版本 : 1.15.2
• nginx-rtmp-module

编译安装

nginx有一些依赖, 所以configure之前需要先确认下这些依赖是否已经安装

// openssl
sudo apt-get install openssl
sudo apt-get libssl-dev

// prce
sudo apt-get install libpcre3 
sudo apt-get install libpcre3-dev
// zlib
sudo apt-get install zlib1g-dev

开始编译

./configure --prefix=安装路径 ----add-module=rtmp模块路径
make 
make install

修改nginx.conf配置

#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 {
    server {
        listen 1935;
        chunk_size 4096;
        
        application dash {
            live on;
            dash on;
            dash_path /home/movie/rtmp/dash;
        }
    }
}

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;
        server_name  localhost;

        location /stat {
            rtmp_stat all;
            rtmp_stat_stylesheet stat.xsl;
        }

        location /stat.xsl {
            root /home/project/nginx-rtmp-module/;
        }

       location /dash {
            # Serve DASH fragments
            root /home/movie/rtmp/;
            add_header Cache-Control no-cache;
        }

        #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;
    #    }
    #}

}

启动测试

找一个推流工具, 我用的是ffmpeg直接读取mp4文件推流给nginx

./ffmpeg -re -i 视频文件路径 -vcodec copy -acodec copy -f flv rtmp://localhost/dash/test

可以在浏览器通过http://localhost/stat查看是否有推流

截图_2018-07-28_21-30-25.png
然后我们找一个支持dash的播放器测试下能不能播放, VLC(3.0.2版本)是支持dash的.
截图_2018-07-28_21-36-01.png 截图_2018-07-28_21-36-15.png

注意请求路径, 如果请求不到,报404, 可能通过查看nginx安装目录下的log文件去定位错误

到这里, dash直播就搭建完了, 下面记录一下如何ffmpeg支持dash协议

ffmpeg开启dash demutex

ffmpeg是从3.4.2版本开始支持dash的, 老版本不行.

安装依赖

ffmpeg是通过libxml2去解析mpd文件的, 所以在configure之前需要先安装libxml2

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

安装之后, 在configure的时候, 加上--enable-libxml2,在configure完成之后,查看config.h文件, 检查CONFIG_DASH_DEMUXER宏是否为1.
然后make & make install.
最后用编译完成的ffplay测试下上面搭建的dash直播

截图_2018-07-28_21-59-02.png