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BAT+js 练手
不显示文件名的话 去掉代码15行 处 “f,”

@if(0)==(0) echo off
dir/b *.mp3|cscript -nologo -e:jscript %0
pause & exit
@end
pad = function(tbl) {  
  return function(num, n) {  
    return (0 >= (n = n-num.toString().length)) ? num : (tbl[n] || (tbl[n] = Array(n+1).join(0))) + num;  
  }  
}([]);
WMP = new ActiveXObject("WMPlayer.OCX");
while (!WScript.StdIn.AtEndOfStream) {
    var f = WScript.StdIn.ReadLine();
    var t = WMP.newMedia(f).GetItemInfo("Duration");
    var h = parseInt(t/3600),m = parseInt(t%60),t = parseInt(t%3600/60);
    WSH.Echo(f,[pad(h,2),pad(t,2),pad(m,2)].join(':'))
}
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