freeswitch配置既能打电话又能语音识别问题（并个unimrcp传自定义参数）

双腿识别，通过订阅事件获取识别结果
为了能实现双腿识别，这里通过Lua脚本使用freeswitch.Session来实现，call.lue放在freeswitch的script目录下

-- call.lua

session:answer();

local caller_number = argv[1];     --主叫号码
local called_number = argv[2];     --被叫号码

local dest = "{ignore_early_media=false,bridge_early_media=true,origination_caller_id_number=caller,origination_caller_id_name=8888,call_timeout=120}user/"..called_number.."";
session2 = freeswitch.Session(dest);
-- hello为语法文件名称
session:execute("detect_speech", "unimrcp {sid=5657}hello default")
session2:execute("detect_speech", "unimrcp {sid=5657}hello default")
freeswitch.bridge(session, session2);

注：其中{sid=*}表示要传给mrcp的参数，即GENERIC_HEADER_VENDOR_SPECIFIC_PARAMS  参考地址：unimrcp-recognize-headers

配置拨号计划

<extension name="test">
      <condition field="destination_number" expression="^(1.*)$">
        <action application="set" data="call_timeout=60"/>
        <action application="set" data="hangup_after_bridge=true"/>
        <action application="set" data="continue_on_fail=true"/>
        <action application="export" data="bridge_answer_timeout=60"/>
        <action application="set" data="called_number=$1"/>
        <action application="lua" data="call.lua ${caller_id_number} ${called_number}"/>
      </condition>
 </extension>