mirror of https://github.com/odrling/Aegisub
Very primitive AS5 specs added.
Originally committed to SVN as r1400.
This commit is contained in:
Rodrigo Braz Monteiro
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[FormatInfo]
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Type=TeXnicCenterProjectInformation
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Version=4
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[ProjectInfo]
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MainFile=as5.tex
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UseBibTeX=0
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UseMakeIndex=0
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ActiveProfile=LaTeX => PDF
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ProjectLanguage=
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ProjectDialect=
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\documentclass{spec}
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\newcommand{\syntax}[1]{
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\subsubsection*{Syntax}
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\begin{tabbing}
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\hspace{2cm}\=\\[-16pt]
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#1
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\end{tabbing}
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}
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\newcommand{\secspec}[1]{Section:\>\texttt{#1}}
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\newcommand{\secspecs}[2]{Sections:\>\texttt{#1}, \texttt{#2}}
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\title{\LaTeX}
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\date{}
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\begin{document}
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\title{AS5 Subtitle Format Draft}
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\author{Rodrigo Braz Monteiro, Niels Martin Hansen, David Lamparter}
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\spectitle
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\section{Abstract}
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This document specifies the \emph{AS5 subtitle format}, developed jointly by the
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Aegisub\cite{Aegisub} and asa\cite{asa} teams in order to replace the old
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\emph{Sub Station Alpha}\cite{SSA} subtitle format and its extensions:
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\begin{itemize}
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\item Advanced Sub Station Alpha (ASS) implemented by VSFilter\cite{VSFilter}
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\item Advanced Sub Station Alpha 2 (ASS2), also implemented by VSFilter
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\item Advanced Sub Station Alpha 3 (ASS3) implemented by equinox.
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\end{itemize}
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The goal is to create a flexible, easy to understand and powerful subtitle format
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that can be used in hardsubs or multiplexed into Matroska Video\cite{mkv} files as
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softsubs.
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\section{File Structure}
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\subsection{File Format}
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All AS5 files are \emph{REQUIRED} to comply with the three requirements below:
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\begin{itemize}
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\item Be encoded with one of \emph{UTF-8}\cite{UTF-8}, \emph{UTF-16 Big Endian}
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\cite{UTF-16} or \emph{UTF-16 Little Endian} Unicode Transformation Formats. UTF-8 is
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preffered.
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\item Not to have any character below Unicode code point U+20, except for U+09, U+0A, U+0D.
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That is, it must be a plain-text file.
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\item All lines must end with Windows line endings, that is, U+0D followed by U+0A.
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\end{itemize}
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The character set of a subtitle file can be autodetermined by its Byte-Order Mark or by
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the value of the first four bytes. See below.
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\subsection{File Structure}
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The file is divided in \emph{sections}, which are uniquely identified by a string inside
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square brackets, in a line of its own. From that point on, every next line is considered
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to be part of the last found section until another section is found. There is no end-of-section
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termination mark; they always end at the start of the next one or at the end of the file.
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\subsubsection{[AS5]}
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This must be the first section in every AS5 file. If the very first line of the file is not
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[AS5], the file \emph{MUST} be rejected by the parser as invalid. Note, however, that the first
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line is allowed to contain a Byte-Order Mark (BOM), which is the character U+FEFF encoded in
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the encoding used for the rest of the script. The first four bytes will therefore be:
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\begin{itemize}
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\item 0xEF 0xBB 0xBF 0x5B - UTF-8 (with BOM)
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\item 0x5B 0x41 0x53 0x53 - UTF-8 (without BOM)
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\item 0xFF 0xFE 0x5B 0x00 - UTF-16 LE (with BOM)
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\item 0x5B 0x00 0x41 0x00 - UTF-16 LE (without BOM)
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\item 0xFE 0xFF 0x00 0x5B - UTF-16 BE (with BOM)
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\item 0x00 0x5B 0x00 0x41 - UTF-16 BE (without BOM)
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\end{itemize}
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\addcontentsline{toc}{section}{References}
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\begin{thebibliography}{1}
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\bibitem{Aegisub} Rodrigo Braz Monteiro, Niels Martin Hansen, David Lamparter et al., Aegisub. Application, 2005-2007.\\
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\url{http://www.aegisub.net/}
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\bibitem{asa} David Lamparter, asa. Application, 2004-2007.\\
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\url{http://asa.diac24.net/}
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\bibitem{SSA} Kotus, Sub Station Alpha. Website, 1997-2003.\\
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\url{http://web.archive.org/web/*/http://www.eswat.demon.co.uk/substation.html}
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\bibitem{ASS} \#Anime-Fansubs, Advanced Sub Station Alpha.\\
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\url{http://www.anime-fansubs.org}\\
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\url{http://moodub.free.fr/video/ass-specs.doc}
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\bibitem{VSFilter} Gabest, VSFilter. Application, 2003-2007.\\
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\url{http://sourceforge.net/projects/guliverkli/}
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\bibitem{ASS3} David Lamparter, Advanced Sub Station Alpha 3. Website, 2007.\\
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\url{http://asa.diac24.net/ass3.pdf}
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\bibitem{mkv} The Matroska project.\\
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\url{http://www.matroska.org/}
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\bibitem{UTF-8} The Internet Society, RFC 3629, "`UTF-8, a transformation format of ISO 10646"'. Website, 2003.\\
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\url{http://tools.ietf.org/html/rfc3629}
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\bibitem{UTF-16} The Internet Society, RFC 2781, "`UTF-16, an encoding of ISO 10646"'. Website, 2000.\\
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\url{http://tools.ietf.org/html/rfc2781}
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\end{thebibliography}
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\end{document}
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\NeedsTeXFormat{LaTeX2e}
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\ProvidesClass{spec}
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\ExecuteOptions{11pt,a4paper}
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\ProcessOptions
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\LoadClass{article}
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% UTF-8 input
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\RequirePackage{ucs}
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\RequirePackage[utf8x]{inputenc}
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\RequirePackage[english]{babel}
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\RequirePackage[margin=3cm]{geometry}
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%\RequirePackage{amsmath}
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%\RequirePackage{amssymb}
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%\RequirePackage{latexsym}
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%\RequirePackage{amsxtra}
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%\RequirePackage{amscd}
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\RequirePackage{charter}
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\RequirePackage{fancyhdr}
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\RequirePackage{color}
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\RequirePackage{hyperref}
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\RequirePackage{url}
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\pagestyle{plain}
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% dont indent paragraphs
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\setlength{\parindent}{0pt}
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\setlength{\parskip}{0pt}
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% some highlighting
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% \todo (no args)
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\definecolor{red}{rgb}{1,0,0}
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\newcommand{\todo}{\textbf\textsf{\color{red}TODO: }}
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% \ann{text...}
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\definecolor{brown}{rgb}{0.66,0.33,0}
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\newcommand{\ann}[1]{\textit\textsf{\color{brown}#1}}
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% RFC2119, use like "x \should\ blah"
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% (dont forget the \ at the end or it will stick to the next word)
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\newcommand{\may}{\textsc{may}}
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\newcommand{\should}{\textsc{should}}
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\newcommand{\shouldnot}{\textsc{should not}}
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\newcommand{\must}{\textsc{must}}
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\newcommand{\mustnot}{\textsc{must not}}
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% oc, as in override code - use: \oc{fade} (no \ inside!)
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\newcommand{\oc}[1]{\texttt{\textbackslash #1}}
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\newcommand{\spectitle}{
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\maketitle
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\setlength{\parskip}{0pt}
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\tableofcontents
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\setlength{\parskip}{8pt}
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\newpage
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}
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\endinput
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