前提
git clone https://github.com/meetecho/janus-gateway.git
sh autogen.sh
./configure --prefix=/opt/janus --enable-websockets --enable-docs
make
sudo make install
make configs//将所有的样例配置模板安装到/opt/janus/etc/janus文件夹下
janus.cfg janus 的全局配置文件，但不包括其他插件的配置文件
例如 janus跟Android APP Demo通信，需要使用WeSocket插件，所以需要安装libwebsocket插件，然后进行相关的配置
janus 默认的配置中是没有 WebSocket 的配置的，直接启动 Janus 会因没有 WebSocket 配置文件而报错。幸运的是在配置目录中 Janus 已经给我们提供了一个 WebSocket 的示例配置文件 ： janus.transport.websockets.cfg.sample，（如果我们要通过 WebSocket 连接 Janus，则需要有个 WebSocket 的配置文件）这里我们可以直接拷贝这个示例文件：
cp janus.transport.websockets.cfg.sample janus.transport.websockets.cfg
./configure --prefix=/opt/janus --enable-websockets
配置完成之后，打印信息
Compiler: gcc
libsrtp version: 2.x
SSL/crypto library: OpenSSL
DTLS set-timeout: not available
Mutex implementation: GMutex (native futex on Linux)
DataChannels support: no
Recordings post-processor: no
TURN REST API client: yes
Doxygen documentation: no
Transports:
REST (HTTP/HTTPS): yes
WebSockets: yes
RabbitMQ: no
MQTT: no
Unix Sockets: yes
Nanomsg: no
Plugins:
Echo Test: yes
Streaming: yes
Video Call: yes
SIP Gateway (Sofia): yes
SIP Gateway (libre): no
NoSIP (RTP Bridge): yes
Audio Bridge: yes
Video Room: yes
Voice Mail: yes
Record&Play: yes
Text Room: yes
Lua Interpreter: no
Duktape Interpreter: no
Event handlers:
Sample event handler: yes
WebSocket ev. handler: yes
RabbitMQ event handler:no
MQTT event handler: no
Nanomsg event handler: no
External loggers:
JSON file logger: no
JavaScript modules: no
If this configuration is ok for you, do a 'make' to start building Janus. A 'make install' will install Janus and its plugins to the specified prefix. Finally, a 'make configs' will install some sample configuration files too (something you'll only want to do the first time, though).
注意--enable-docs加载不成功，因此去掉该配置项
checking for doxygen... doxygen
checking for dot... no
configure: error: doxygen or dot not found. See README.md for installation instructions or remove --enable-docs