虎牙直播弹幕转换字幕格式 基于Node.js 的 huya-danmu

1 首先安装nodejs运行环境, 从 http://nodejs.cn/download/ 下载对应的版本

2 安装 huya-danmu 模块, https://github.com/BacooTang/huya-danmu 有详细的安装方法

3 参照 huya-danmu 模块中 test.js 编写 huya.js 新文件

 const huya_danmu = require('./index')
 var fs = require('fs')

 const roomid = process.argv[2]
 const client = new huya_danmu(roomid)
 var t1 = new Date().getTime()
 var t2 = t1
 var interval = 0
 var logName = ''
 t1 = process.uptime()*1000

 var emots = {
 "/{dx" : "[大笑]",
 "/{sh" : "[送花]",
 "/{tx" : "[偷笑]",
 "/{dk" : "[大哭]",
 "/{hh" : "[嘿哈]",
 "/{66" : "[666]",
 "/{gd" : "[感动]",
 "/{yw" : "[疑问]",
 "/{xh" : "[喜欢]",
 "/{jx" : "[奸笑]",
 "/{zan" : "[赞]",
 "/{ka" : "[可爱]",
 "/{am" : "[傲慢]",
 "/{kx" : "[开心]",
 "/{88" : "[拜拜]",
 "/{hx"  : "[害羞]",
 "/{zs"  : "[衰]",
 "/{pu"  : "[吐血]",
 "/{zc"  : "[嘴馋]",
 "/{sq"  : "[生气]",
 "/{fe"  : "[扶额]",
 "/{bz"  : "[闭嘴]",
 "/{kw"  : "[枯萎]",
 "/{xu"  : "[嘘]",
 "/{xk"  : "[笑哭]",
 "/{lh"  : "[流汗]",
 "/{bk"  : "[不看]",
 "/{hq"  : "[哈欠]",
 "/{tp"  : "[调皮]",
 "/{gl"  : "[鬼脸]",
 "/{cl"  : "[戳脸]",
 "/{dg"  : "[大哥]",
 "/{kun" : "[困]",
 "/{yb"  : "[拥抱]",
 "/{zt"  : "[猪头]",
 "/{kl"  : "[骷髅]",
 "/{cc"  : "[臭臭]",
 "/{xd"  : "[心动]",
 "/{dao" : "[刀]"
 }

 function checkemot(str)
 {
     if(str.includes('/{') == false ) return str
     for(var key in emots) {
         str = str.replace(new RegExp(key,'g'), emots[key])
     }
     return str
 }

 function PFI(num)
 {
     if(num<10)
         return '0'+num
     else
         return num
 }

 function PFI3(num)
 {
     if(num<10) return '00'+num
     if(num<100) return '0'+num
     return num
 }

 function getNowFormatDate()
 {
     var date = new Date();
     var seperator1 = "";
     var seperator2 = "";
     var month = date.getMonth() + 1;
     var strDate = date.getDate();
     if (month >= 1 && month <= 9)
     {
         month = "0" + month;
     }
     if (strDate >= 0 && strDate <= 9)
     {
         strDate = "0" + strDate;
     }

     var strHH = date.getHours()
     var strMM = date.getMinutes()
     var strSS = date.getSeconds()
     if (strHH >= 0 && strHH <= 9) strHH = "0" + strHH;
     if (strMM >= 0 && strMM <= 9) strMM = "0" + strMM;
     if (strSS >= 0 && strSS <= 9) strSS = "0" + strSS;

     var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
             + "-" + strHH + seperator2 + strMM + seperator2 + strSS;
     return currentdate;
 }

 function init()
 {
     var savepath = process.argv[3]
     var savefn = process.argv[4]
     if(typeof(savefn)=='undefined')
         savefn = ""
     else
         savefn = "_" + savefn.replace(/ /g,"_")
     if(typeof(savepath)=='undefined')
         logName = './'+getNowFormatDate()+'_'+roomid+savefn+'.LRC'
     else
         logName = savepath+'/'+getNowFormatDate()+'_'+roomid+savefn+'.LRC'
     console.log(logName)
     fs.appendFile(logName,'[ti:'+getNowFormatDate()+ ']\n', function (err) {});
     fs.appendFile(logName,'[ar:'+savefn+']\n', function (err) {});
     fs.appendFile(logName,'[offset:0]\n', function (err) {});
 }

 init()

 client.on('connect', () => {
     console.log(`已连接huya ${roomid}`)
 })

 client.on('message', msg => {
     switch (msg.type) {
         case 'chat':
             //console.log(`[${msg.from.name}]:${msg.content}`)
             t2 = process.uptime()*1000
             interval = (t2 - t1)
             var date = new Date( interval )
             var HH = date.getUTCHours()
             var MM = PFI(date.getUTCMinutes()+HH*60)
             var SS = PFI(date.getUTCSeconds())
             var MS = PFI3(parseInt(date.getUTCMilliseconds()))
             var msg = `[${MM}:${SS}.${MS}]　${msg.content}`
             msg = checkemot(msg)
             console.log(msg)
             fs.appendFile(logName, msg+'\n', function (err) {})
             break
          // case 'gift':
             // console.log(`[${msg.from.name}]->赠送${msg.count}个${msg.name}`)
             // break
          // case 'online':
             // console.log(`[当前人气]:${msg.count}`)
             // break
     }
 })

 client.on('error', e => {
     console.log(e)
 })

 client.on('close', () => {
     console.log('close')
 })

 client.start()

参数说明:

node.exe huya.js [虎牙房间号] [要存储目录的绝对路径] [文件名]

编写调用 huya.js 的 批处理文件 huyaDanmu.cmd

 @echo off
 title %1 %3 %date% %time%
 D:\node-v8.9.1-win-x86\node.exe D:\node-v8.9.1-win-x86\node_modules\huya-danmu\huya.js %1 %2 %3

打开控制台窗口 输入 huyaDanmu [虎牙房间号] [要存储目录的绝对路径] [文件名]

不输入存储目录时 直接保存到当前目录

不输入文件名时 自动取名为 YYMMDD-HHMMSS_房间号.LRC

保存的格式是 LRC 歌词文件, 如果想转换 SRT 或者 ASS 格式也很方便, 利用新版 FFMpeg 就可以

 ffmpeg -i xxx.LRC xxx.SRT
 ffmpeg -i xxx.LRC xxx.ASS

温馨提示: 录视频的同时运行 huyaDanmu 批处理命令, 就不用在调整时间轴;