iPad中的OPlayer只支持srt格式的字幕，而动画一般使用的是ass/ssa格式的字幕，所以需要将ass/ssa批量转换srt。
Google了一下，在《ass2srt[ass/ssa批量转换srt]》中找到一个ass2srt.wsf脚本，内容如下：
<job id="ass2srt">
<script language="JScript">
cInput="unicode"; // You can find them from:
cOutput="utf-8"; // HKEY_CLASSES_ROOT\MIME\Database\Charset
function rrr(){
re = /Dialogue: [^,.]*[0-9]*,([1-9]?[0-9]*:[0-9]*:[0-9]*.[0-9]*),([1-9]?[0-9]*:[0-9]*:[0-9]*.[0-9]*),[^,.]*,[^,.]*,[0-9]*,[0-9]*,[0-9]*,[^,.]*,(.*)/gi;
rv = ss.match(re);
t1 = RegExp.$1;
t2 = RegExp.$2;
t3 = RegExp.$3;
rg = /\{[^}.]*(\\pos\([0-9]*,[0-9]*\))[^}.]*}/gi;
t3 = t3.replace(rg,"$1" + "}");
rg =/\{[^}.]*}/gi;
t3 = t3.replace(rg,"");
rg =/(\\pos\([0-9]*,[0-9]*\)})/gi;
t3 = t3.replace(rg,"{" + "$1");
}
</Script>
<script language="VBScript">
set ad=CreateObject("adodb.stream")
set af=CreateObject("adodb.stream")
set ass=CreateObject("adodb.stream")
ad.open
af.open
ass.open
ad.Charset=cInput
af.Charset=cOutput
ass.Charset=cOutput
Set objArgs = WScript.Arguments
For I = 0 to objArgs.Count - 1
ad.LoadFromFile(objArgs(I))
z=0
gg=left(objArgs(I),len(objArgs(I))-3)&"srt"
Do While ad.eos <> True
ss =ad.ReadText(-2)
if left(ss,8)="Dialogue" then
ss=replace(ss,",,",",d,")
rrr
t3=replace(t3,"\n",vbcrlf)
t3=replace(t3,"\N",vbcrlf)
z=z+1
af.writetext z,1
af.writetext t1 & " --> " & t2,1
af.writetext t3 & vbcrlf & vbcrlf
else
ass.writetext ss,1
end if
Loop
af.savetofile gg,2
ass.savetofile gg&".style",2
Next
if i=0 then
msgbox "Please drag files to me!",,"Error!"
else
msgbox "Converted "&i&" file(s).",,"All Over!"
end if
</Script>
</job>
Windows 脚本 (.wsf) 文件是一个包含可扩展标记语言(XML)代码的文本文档，它结合了若干功能，提高了脚本编程的灵活性。由于 Windows 脚本文件并不局限于特定的引擎，它们能够包含所有遵循 ActiveX(R)规范的脚本引擎的脚本。
上面的脚本文件同时包含了JScript和VBScript的代码。问题在于，有这个必要么？单纯用JScript或者VBScript都可以实现，为什么要混用不同的语言呢？JScript在代码中的作用仅仅是正则表达式而已，一个合理的推断是作者不会VBScript的正则表达式，或者嫌VBScript的正则表达式太麻烦。就算撇开语言混杂不说，上面代码的风格实在是不敢恭维。
下面是我写的ass2srt.vbs，也许比上面的代码好一点点罢。
Option Explicit
Const Encoding = "unicode" 'assume unicode
'Author: Demon
'Website: http://demon.tw
'Date: 2012/6/16
Dim shell, folder, fso, ext, i, args
Set shell = CreateObject("Shell.Application")
Set fso = CreateObject("scripting.filesystemobject")
Set args = WScript.Arguments
If args.Count = 0 Then
Set folder = shell.BrowseForFolder(0, "请选择ASS字幕所在的文件夹", 1)
If folder Is Nothing Then WScript.Quit
For Each i In fso.GetFolder(folder.Self.Path).Files
ext = LCase(fso.GetExtensionName(i.Path))
If ext = "ass" Or ext = "ssa" Then
ASS2SRT i.Path, Encoding
End If
Next
Else
For i = 0 To args.Count - 1
ASS2SRT args(i), Encoding
Next
End If
MsgBox CInt(i) & " file(s) Converted!", vbInformation
Function ASS2SRT(path, charset)
Const adTypeText = 2
Const adReadLine = -2
Const adSaveCreateOverWrite = 2
Dim ass, srt, re, str, arr, s, e, t, i
Set ass = CreateObject("ADODB.Stream")
Set srt = CreateObject("ADODB.Stream")
Set re = New RegExp
re.Global = True
re.IgnoreCase = True
re.Pattern = "\{.*?\}"
ass.Type = adTypeText
ass.Charset = charset
ass.Open
ass.LoadFromFile path
srt.Type = adTypeText
srt.Charset = "utf-8"
srt.Open
i = 0
Do Until ass.EOS
str = ass.ReadText(adReadLine)
If Left(str, 8) = "Dialogue" Then
i = i + 1
arr = Split(str, ",", 10)
s = "0" & arr(1) & "0" 'Start time
e = "0" & arr(2) & "0" 'End time
t = arr(9) 'Text
s = Replace(s, ".", ",")
e = Replace(e, ".", ",")
t = re.Replace(t, "")
t = Replace(t, "\n", vbCrLf)
t = Replace(t, "\N", vbCrLf)
srt.WriteText i & vbCrLf
srt.WriteText s & " --> " & e & vbCrLf
srt.WriteText t & vbCrLf & vbCrLf
End If
Loop
path = Left(path, Len(path) - 3) & "srt"
srt.SaveToFile path, adSaveCreateOverWrite
End Function
把上面代码保存为ass2srt.vbs，然后将需要转换的ass/ssa字幕拖动到ass2srt.vbs脚本上即可。如果需要批量转换的ass/ssa字幕比较多，可以先把它们放到同一个文件夹里，然后直接双击运行ass2srt.vbs，选择字幕所在的文件夹即可。
