SRS流媒体服务器——Forward集群搭建和源码分析

移动开发 2022-06-23 15:43:09 阅读次数: 0

目录

  1. Forward集群原理
  2. RTMP流转发（Forward）部署实例
  3. Forward集群源码分析

1. Forward集群原理

Forward 表示向前、前头的、发送等意思。

在SRS中可以理解为把Master节点获得直播流⼴播（转发）给所有的Slave节点，master节点由多少路直播流，那么在每个slave节点也会多少路直播流。

注：在SRS中还有另外⼀种集群⽅式，edge⽅式。注意两种⽅式的⽤词不同。

a. 在Forward模式中，中⼼节点叫Master，边缘节点叫Slave。

b. 在edge模式中，中⼼节点叫origin（源站），边缘节点叫做edge。

1. 适用场景

Forward适合与搭建小型集群。

推流者推流给master，那么master就会Forward到每一个Slave，那么在slave节点上不论需不需要都会有master过来的流。

如果推流者的数量为10，那么master到slave之间的带宽就是：带宽=10 *slave的个数 *直播流码率，随着slave的增多，master的出口带宽会不断提高。

而现实是，在某些slave节点其实没有人看，这样就造成了master到slave之间的带宽浪费。

所以说Forward适合与搭建小型集群。

2. RTMP流转发（Forward）部署实例

SRS可以将送到SRS的流转发给其他RTMP服务器，实现简单集群/热备功能，也可以实现一路流热备

a. 如编码器由于带宽限制，只能送一路流到RTMP服务器，要求RTMP服务器能将这路流也转发给其他RTMP备用服务器，实现主备容错集群

假设服务器的IP是：8.141.75.248

Forward就是SRS将流拷贝输出给其他的RTMP服务器，以SRS转发给SRS为例：

  • 主SRS：Master, 编码器推流到主SRS，主SRS将流处理的同时，将流转发到备SRS

  • 备SRS：Slave, 主SRS转发流到备SRS，就像编码器推送流到备用SRS一样。 我们的部署实例中，主SRS侦听1935端口，备SRS侦听19350端口。

1. 编写主SRS配置⽂件

  1. vim conf/forward.master.conf
# the config for srs to forward
# @see https://github.com/ossrs/srs/wiki/v1_CN_SampleForward
# @see full.conf for detail config.

listen              1935;
max_connections     1000;
pid                 ./objs/srs.master.pid;
vhost __defaultVhost__ {
    forward {
        enabled on;
        destination 127.0.0.1:19350 127.0.0.1:19351; #forward目的地址，增加一个19351端口
    }
}

2.启动srs服务器。

./objs/srs -c conf/forward.master.conf

监听日志信息：tail -f ./objs/srs.log

2. 编写从SRS配置文件

  1. 复制conf/forward.slave.conf到conf/forward.slave1.conf，conf/forward.slave2.conf。
cp conf/forward.slave.conf conf/forward.slave1.conf
cp conf/forward.slave.conf conf/forward.slave2.conf

2.修改conf/forward.slave1.conf配置文件。

# the config for srs to forward
# @see https://github.com/ossrs/srs/wiki/v1_CN_SampleForward
# @see full.conf for detail config.

listen              19350; #注意端口
max_connections     1000;
pid                 ./objs/srs.slave1.pid;  #./objs/srs.slave.pid改为./objs/srs.slave1.pid
srs_log_tank 		file;
srs_log_file 		./objs/srs.slave1.log;
vhost __defaultVhost__ {
}

3.修改conf/forward.slave2.conf配置文件。

# the config for srs to forward
# @see https://github.com/ossrs/srs/wiki/v1_CN_SampleForward
# @see full.conf for detail config.

listen              19351;
max_connections     1000;
pid                 ./objs/srs.slave2.pid;
srs_log_tank 		file;
srs_log_file 		./objs/srs.slave2.log;
vhost __defaultVhost__ {
}

4.启动slave1和slave2

./objs/srs -c conf/forward.slave1.conf
./objs/srs -c conf/forward.slave2.conf


监听日志信息：tail -f ./objs/srs.log

5.启动srs后查看srs是否启动成功：netstat -anp|grep srs

本文结尾底部，领取最新最全C++音视频学习提升资料，内容包括（C/C++，Linux 服务器开发，FFmpeg ，webRTC ，rtmp ，hls ，rtsp ，ffplay ，srs）↓↓↓↓↓↓文章底部

3. 验证是否部署成功

1. 启动推流编码器

  1. 使用FFmpeg进行推流
ffmpeg -re -i source.200kbps.768x320.flv -vcodec copy -acodec copy -f flv -y rtmp://8.141.75.248/live/livestream

2.涉及到的流包括：

编码器推送的流：rtmp://8.141.75.248/live/livestream

主SRS转发的流：rtmp://8.141.75.248:19350/live/livestream
主SRS转发的流：rtmp://8.141.75.248:19351/live/livestream

观看主SRS的流：rtmp://8.141.75.248/live/livestream
观看从1 SRS的流：rtmp://8.141.75.248:19350/live/livestream
观看从2 SRS的流：rtmp://8.141.75.248:19351/live/livestream

2. 观看主从SRS的RTMP流

主RTMP流地址为：rtmp://8.141.75.248/live/livestream

从1 SRS的流：rtmp://8.141.75.248:19350/live/livestream

从2 SRS的流：rtmp://8.141.75.248:19351/live/livestream

可以使用VLC观看或者SRS播放器播放：srs播放器

注意：19350和19351端口需要在服务器开放，不然从节点无法拉流

3. Forward集群源码分析

  1. 从原理上来分析，要实现forward功能：

  2. 读取配置⽂件获取forward server的地址

  3. 创建RTMP推流客户端

  4. 从source⾥⾯拉取消息，然后推送给forward server

1. 从配置文件开始分析

  1. 打开 conf/forward.master.conf 配置文件。
listen              1935;
max_connections     1000;
pid                 ./objs/srs.master.pid;
srs_log_tank        file;
srs_log_file        ./objs/srs.master.log;
vhost __defaultVhost__ {
    forward {
        enabled on;
        destination 127.0.0.1:19350 127.0.0.1:19351;
    }
}

日志打印在终端设置方法：
#srs_log_tank        file;
#srs_log_file        ./objs/srs.log;
daemon              off;
srs_log_tank        console;

2.在srs_app_config.cpp中搜索“forward”即可发现读取“forward”的代码。

bool SrsConfig::get_forward_enabled(string vhost)
{
    static bool DEFAULT = false;
    
    SrsConfDirective* conf = get_vhost(vhost);
    if (!conf) {
        return DEFAULT;
    }
    
    conf = conf->get("forward");
    if (!conf) {
        return DEFAULT;
    }
    
    conf = conf->get("enabled");
    if (!conf || conf->arg0().empty()) {
        return DEFAULT;
    }
    
    return SRS_CONF_PERFER_FALSE(conf->arg0());
}

SrsConfDirective* SrsConfig::get_forwards(string vhost)
{
    SrsConfDirective* conf = get_vhost(vhost);
    if (!conf) {
        return NULL;
    }
    
    conf = conf->get("forward");
    if (!conf) {
        return NULL;
    }
    
    return conf->get("destination");
}

2. 使用gdb打断点进行分析：

  1. 使用gdb打断点进行分析：
gdb ./objs/srs

(gdb) set args -c conf/forward.master.conf
(gdb) b SrsConfig::get_forward_enabled(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)
Breakpoint 1 at 0x53701d: file src/app/srs_app_config.cpp, line 4837.
(gdb) b SrsConfig::get_forwards(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)
Breakpoint 2 at 0x5372df: file src/app/srs_app_config.cpp, line 4859.

2.推流后才能进行调试：

ffmpeg -re -i source.200kbps.768x320.flv -vcodec copy -acodec copy -f flv -y rtmp://8.141.75.248/live/livestream

3.SrsConfig::get_forward_enabled 对应调试信息：

Breakpoint 1, SrsConfig::get_forward_enabled (this=0xa0fcf0, vhost="__defaultVhost__") at src/app/srs_app_config.cpp:4837
4837	{
(gdb) bt
#0  SrsConfig::get_forward_enabled (this=0xa0fcf0, vhost="__defaultVhost__") at src/app/srs_app_config.cpp:4837
#1  0x00000000004e277a in SrsOriginHub::create_forwarders (this=0xab8000) at src/app/srs_app_source.cpp:1467
#2  0x00000000004e1214 in SrsOriginHub::on_publish (this=0xab8000) at src/app/srs_app_source.cpp:1120
#3  0x00000000004e76ce in SrsSource::on_publish (this=0xab7cd0) at src/app/srs_app_source.cpp:2457
#4  0x00000000004d96ca in SrsRtmpConn::acquire_publish (this=0xa9be50, source=0xab7cd0) at src/app/srs_app_rtmp_conn.cpp:940
#5  0x00000000004d874c in SrsRtmpConn::publishing (this=0xa9be50, source=0xab7cd0) at src/app/srs_app_rtmp_conn.cpp:822
#6  0x00000000004d5ee7 in SrsRtmpConn::stream_service_cycle (this=0xa9be50) at src/app/srs_app_rtmp_conn.cpp:534
#7  0x00000000004d4ddf in SrsRtmpConn::service_cycle (this=0xa9be50) at src/app/srs_app_rtmp_conn.cpp:388
#8  0x00000000004d3ba7 in SrsRtmpConn::do_cycle (this=0xa9be50) at src/app/srs_app_rtmp_conn.cpp:209
#9  0x00000000004d1d99 in SrsConnection::cycle (this=0xa9bec8) at src/app/srs_app_conn.cpp:171
#10 0x000000000050ab08 in SrsSTCoroutine::cycle (this=0xa9c130) at src/app/srs_app_st.cpp:198
#11 0x000000000050ab7d in SrsSTCoroutine::pfn (arg=0xa9c130) at src/app/srs_app_st.cpp:213
#12 0x00000000005bed1a in _st_thread_main () at sched.c:337
#13 0x00000000005bf492 in st_thread_create (start=0x5be696 <_st_vp_schedule+170>, arg=0x700000001, joinable=1, stk_size=1) at sched.c:616
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

4.forward metadata，video，audio数据。

b SrsForwarder::on_meta_data(SrsSharedPtrMessage*)

(gdb) bt
#0  SrsForwarder::on_meta_data (this=0xab9e60, shared_metadata=0xb28490) at src/app/srs_app_forward.cpp:114
#1  0x00000000004df741 in SrsOriginHub::on_meta_data (this=0xab8000, shared_metadata=0xb28490, packet=0xb283f0) at src/app/srs_app_source.cpp:924
#2  0x00000000004e5e23 in SrsSource::on_meta_data (this=0xab7cd0, msg=0xb28210, metadata=0xb283f0) at src/app/srs_app_source.cpp:2113
#3  0x00000000004d9e93 in SrsRtmpConn::process_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:1045
#4  0x00000000004d9aa6 in SrsRtmpConn::handle_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:993
#5  0x0000000000582720 in SrsPublishRecvThread::consume (this=0xab6480, msg=0xb28210) at src/app/srs_app_recv_thread.cpp:389
#6  0x000000000058123e in SrsRecvThread::do_cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:146
#7  0x000000000058108f in SrsRecvThread::cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:115
#8  0x000000000050ab08 in SrsSTCoroutine::cycle (this=0xb024f0) at src/app/srs_app_st.cpp:198
#9  0x000000000050ab7d in SrsSTCoroutine::pfn (arg=0xb024f0) at src/app/srs_app_st.cpp:213
#10 0x00000000005bed1a in _st_thread_main () at sched.c:337
#11 0x00000000005bf492 in st_thread_create (start=0xab8290, arg=0xab61b0, joinable=0, stk_size=11231648) at sched.c:616
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

b SrsForwarder::on_video(SrsSharedPtrMessage*)
    
(gdb) bt
#0  SrsForwarder::on_video (this=0xab9e60, shared_video=0xb13080) at src/app/srs_app_forward.cpp:155
#1  0x00000000004e1037 in SrsOriginHub::on_video (this=0xab8000, shared_video=0xb13080, is_sequence_header=true) at src/app/srs_app_source.cpp:1106
#2  0x00000000004e6c59 in SrsSource::on_video_imp (this=0xab7cd0, msg=0xb13080) at src/app/srs_app_source.cpp:2303
#3  0x00000000004e68ad in SrsSource::on_video (this=0xab7cd0, shared_video=0xb28210) at src/app/srs_app_source.cpp:2258
#4  0x00000000004d9c7f in SrsRtmpConn::process_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:1021
#5  0x00000000004d9aa6 in SrsRtmpConn::handle_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:993
#6  0x0000000000582720 in SrsPublishRecvThread::consume (this=0xab6480, msg=0xb28210) at src/app/srs_app_recv_thread.cpp:389
#7  0x000000000058123e in SrsRecvThread::do_cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:146
#8  0x000000000058108f in SrsRecvThread::cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:115
#9  0x000000000050ab08 in SrsSTCoroutine::cycle (this=0xb024f0) at src/app/srs_app_st.cpp:198
#10 0x000000000050ab7d in SrsSTCoroutine::pfn (arg=0xb024f0) at src/app/srs_app_st.cpp:213
#11 0x00000000005bed1a in _st_thread_main () at sched.c:337
#12 0x00000000005bf492 in st_thread_create (start=0xab8290, arg=0xab61b0, joinable=0, stk_size=11231648) at sched.c:616
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

b SrsForwarder::on_audio(SrsSharedPtrMessage*)
    
(gdb) bt
#0  SrsForwarder::on_audio (this=0xab9e60, shared_audio=0xb13090) at src/app/srs_app_forward.cpp:132
#1  0x00000000004e02d9 in SrsOriginHub::on_audio (this=0xab8000, shared_audio=0xb13090) at src/app/srs_app_source.cpp:1013
#2  0x00000000004e644e in SrsSource::on_audio_imp (this=0xab7cd0, msg=0xb13090) at src/app/srs_app_source.cpp:2188
#3  0x00000000004e6051 in SrsSource::on_audio (this=0xab7cd0, shared_audio=0xb28210) at src/app/srs_app_source.cpp:2138
#4  0x00000000004d9c00 in SrsRtmpConn::process_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:1014
#5  0x00000000004d9aa6 in SrsRtmpConn::handle_publish_message (this=0xa9be50, source=0xab7cd0, msg=0xb28210) at src/app/srs_app_rtmp_conn.cpp:993
#6  0x0000000000582720 in SrsPublishRecvThread::consume (this=0xab6480, msg=0xb28210) at src/app/srs_app_recv_thread.cpp:389
#7  0x000000000058123e in SrsRecvThread::do_cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:146
#8  0x000000000058108f in SrsRecvThread::cycle (this=0xab6488) at src/app/srs_app_recv_thread.cpp:115
#9  0x000000000050ab08 in SrsSTCoroutine::cycle (this=0xb024f0) at src/app/srs_app_st.cpp:198
#10 0x000000000050ab7d in SrsSTCoroutine::pfn (arg=0xb024f0) at src/app/srs_app_st.cpp:213
#11 0x00000000005bed1a in _st_thread_main () at sched.c:337
#12 0x00000000005bf492 in st_thread_create (start=0xab8290, arg=0xab61b0, joinable=0, stk_size=11231648) at sched.c:616
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

5.SrsForwarder::do_cycle() 完成建联，推流到slave操作。

  1. 主要逻辑在：SrsForwarder::forward()

b SrsForwarder::forward()

(gdb) bt
#0  SrsForwarder::forward (this=0xab9e60) at src/app/srs_app_forward.cpp:248
#1  0x00000000004f8648 in SrsForwarder::do_cycle (this=0xab9e60) at src/app/srs_app_forward.cpp:237
#2  0x00000000004f7fd7 in SrsForwarder::cycle (this=0xab9e60) at src/app/srs_app_forward.cpp:190
#3  0x000000000050ab08 in SrsSTCoroutine::cycle (this=0xab9c20) at src/app/srs_app_st.cpp:198
#4  0x000000000050ab7d in SrsSTCoroutine::pfn (arg=0xab9c20) at src/app/srs_app_st.cpp:213
#5  0x00000000005bed1a in _st_thread_main () at sched.c:337
#6  0x00000000005bf492 in st_thread_create (start=0xab8290, arg=0xab61b0, joinable=0, stk_size=11231648) at sched.c:616
Backtrace stopped: previous frame inner to this frame (corrupt stack?)

原文链接：SRS流媒体服务器——Forward集群搭建和源码分析 - 资料 - 我爱音视频网 - 构建全国最权威的音视频技术交流分享论坛

本文结尾底部↓↓↓，领取最新最全C++音视频学习提升资料，内容包括（C/C++，Linux 服务器开发，FFmpeg ，webRTC ，rtmp ，hls ，rtsp ，ffplay ，srs）↓↓↓↓↓↓

猜你喜欢

转载自blog.csdn.net/m0_60259116/article/details/125434195
今日推荐
基于大语言模型的开源知识库问答系统 MaxKB GitHub Star 数量突破 5,000 个！
美国拟限制 AI 大模型出口中国和俄罗斯
苹果将与 OpenAI 达成协议，将 ChatGPT 应用于 iPhone
openKylin 社区生态委员会第六次会议圆满召开
阿里云正式发布通义千问 2.5
Python 3.13 发布首个 Beta：实验性自由线程模式和 JIT、改进交互式解释器
Stack Overflow 拿我的代码去训练 AI 大模型，还封了我的账号
Pop!_OS 的 COSMIC 桌面完成 App Store 上架工作
报告：Django 仍然是 74% 开发者的首选
《2024 年一季度互联网投融资运行情况》研究报告
15 年前上了“FFmpeg 耻辱柱”，今天他还得谢谢咱——腾讯QQPlayer一雪前耻？
TIOBE 5 月榜单：Fortran “复活”进入 Top 10
周排行
BPM为企业带来的实际利益
好程序员web前端分享css常用属性缩写
Java文件下载（excel）
css样式的动态添加及显示和隐藏等零碎用法
axios全局配置以及拦截器
使用Logstash来实时同步MySQL和log日志数据到ES
C++获取当前时间（年月日、时分秒、毫秒）
Odoo产品分析 (四) -- 工具板块(11) -- 网站即时聊天(1)
Java环境配置正确，但是java、javac、java -version均返回“不是内部或外部命令，也不是可运行的程序或批处理文件”？
01 官网下载各种CentOS教程（超详细版）
每日归档
更多
2024-05-14(0)
2024-05-13(18)
2024-05-12(0)
2024-05-11(38)
2024-05-10(38)
2024-05-09(35)
2024-05-08(42)
2024-05-07(14)
2024-05-06(40)
2024-05-05(0)

代码天地 © 2018 codetd.com

境外服务器   最新电视剧2022