Cross-platform advanced subtitle editor
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CoffeeFlux Update libass
Worth noting that this does NOT currently build, thanks to a few lines in libass that are not compatible with vc++. I'll bump the libass commit when MrSmile's pr gets merged and this is remedied. You can apply this commit to remedy that: libass/libass@5317a8d
Also worth noting that while libass switched to nasm, I haven't done so here because it wasn't worth the effort, so I just made a questionable change to the yasm.targets to emulate nasm behavior
Latest commit 7853e7a Jan 8, 2019
Type Name Latest commit message Commit time
Failed to load latest commit information.
.nuget Move everything up a level since the root dir no longer has stuff Mar 11, 2014
automation Add support for setting status bar text from Lua Apr 30, 2018
build Update libass Jan 8, 2019
docs Modify to produce a static mirror suitable fo… Sep 4, 2012
libaegisub Bump _WIN32_WINNT to Vista Jan 8, 2019
m4macros added missing files (#57) Apr 29, 2018
packages Excise the hopefully last mention of ASSDraw Jan 8, 2019
po it.po: fix typo (#59) Apr 29, 2018
src Use FFMS2 constant in place of magic number Jan 8, 2019
tests Makefiles: replace the use of subst macro with patsubst (#56) Mar 5, 2018
tools Update strip-icu to python 3 Jan 8, 2019
vendor Update libass Jan 8, 2019
.gitignore Add installer vendor folder to gitignore Nov 17, 2018
.gitmodules Update uchardet Jan 8, 2019
.travis.yml Build with boost 1.60 when using GCC 5 on Travis Mar 5, 2016
Aegisub.sln Remove fontconfig entirely from the Windows build Dec 30, 2015
LICENCE Move everything up a level since the root dir no longer has stuff Mar 11, 2014
Makefile Remove the in-repo copy of the fontconfig config files Jun 24, 2014 Bump minimum macOS version to 10.8 Jul 4, 2017 Bump minimum macOS version to 10.8 Jul 4, 2017 Update OSX build instructions May 31, 2018
acinclude.m4 Build: update boost m4 macros Jan 27, 2018 Move everything up a level since the root dir no longer has stuff Mar 11, 2014
config.guess Update config.sub, config.guess, install-sh (#77) Sep 24, 2018
config.sub Update config.sub, config.guess, install-sh (#77) Sep 24, 2018 Build: update boost m4 macros Jan 27, 2018 Switch to a maintained fork of universalchardet Feb 10, 2016
install-sh Update config.sub, config.guess, install-sh (#77) Sep 24, 2018


For binaries and general information see the homepage.

The bug tracker can be found at

Support is available on the forums or on IRC.

Building Aegisub



  1. Visual Studio 2015 (the free Community edition is good enough)
  2. The June 2010 DirectX SDK (the final release before DirectSound was dropped)
  3. Yasm installed to somewhere on your path.

There are a few optional dependencies:

  1. msgfmt, to build the translations
  2. WinRAR, to build the portable installer
  3. InnoSetup, to build the regular installer

All other dependencies are either stored in the repository or are included as submodules.


  1. Clone Aegisub's repository recursively to fetch it and all submodules: git clone --recursive This will take quite a while and requires about 2.5 GB of disk space.
  2. Open Aegisub.sln
  3. Build the BuildTasks project.
  4. Build the entire solution.

You should now have a bin directory in your Aegisub directory which contains aegisub32d.exe, along with a pile of other files.

The Aegisub installer includes some files not built as part of Aegisub (such as Avisynth and VSFilter), so for a fully functional copy of Aegisub you now need to copy all of the files from an installed copy of Aegisub into your bin directory (and don't overwrite any of the files already there). You'll also either need to copy the automation directory into the bin directory, or edit your automation search paths to include the automation directory in the source tree.

After building the solution once, you'll want to switch to the Debug-MinDep configuration, which skips checking if the dependencies are out of date, as that takes a while.


A vaguely recent version of Xcode and the corresponding command-line tools are required. Nothing older than Xcode 5 has been tested recently, but it is likely that some later versions of Xcode 4 are good enough.

For personal usage, you can use homebrew to install almost all of Aegisub's dependencies:

brew install autoconf automake ffmpeg ffms2 fftw freetype fribidi gettext icu4c libass m4 pkg-config
brew install --devel --with-gc64 luajit
brew link --force icu4c
brew link --force gettext
brew install --with-icu4c boost

wxWidgets is located in vendor/wxWidgets, and can be built like so:

./configure --disable-aboutdlg --disable-animatectrl --disable-aui --disable-any \
--disable-bannerwindow --disable-base64 --disable-calendar --disable-caret \
--disable-cmdline --disable-colourpicker --disable-compat28 --disable-config \
--disable-constraints --disable-datepick --disable-dctransform --disable-debugreport \
--disable-dialupman --disable-docview --disable-filehistory --disable-finddlg \
--disable-fs_archive --disable-fs_inet --disable-fs_zip --disable-fsvolume \
--disable-fswatcher --disable-gif --disable-help --disable-html --disable-ipc \
--disable-joystick --disable-jpeg --disable-largefile --disable-markup --disable-mdi \
--disable-mediactrl --disable-metafiles --disable-miniframe --disable-notifmsg \
--disable-numberdlg --disable-pcx --disable-pnm --disable-postscript \
--disable-prefseditor --disable-printarch --disable-progressdlg --disable-propgrid \
--disable-protocol --disable-protocols --disable-rearrangectrl --disable-ribbon \
--disable-richtext --disable-richtooltip --disable-snglinst --disable-sockets \
--disable-sockets --disable-sound --disable-splash --disable-splines \
--disable-std_iostreams --disable-svg --disable-tarstream --disable-tiff \
--disable-tipdlg --disable-tipwindow --disable-url --disable-webkit --disable-webview \
--disable-wizarddlg --disable-xrc \
--enable-geometry --enable-imaglist --enable-listctrl --enable-stc --with-cocoa \
--with-libpng=yes --with-macosx-version-min=10.9 \
--with-opengl \
--without-libjpeg --without-libtiff --without-regex \
&& make

Once the dependencies are installed, build Aegisub with autoreconf && ./configure --with-wxdir=/path/to/Aegisub/vendor/wxWidgets && make && make osx-bundle. autoreconf should be skipped if you are building from a source tarball rather than git.

Updating Moonscript

From within the Moonscript repository, run bin/moon bin/splat.moon -l moonscript moonscript/ > bin/moonscript.lua. Open the newly created bin/moonscript.lua, and within it make the following changes:

  1. Prepend the final line of the file, package.preload["moonscript"](), with a return, producing return package.preload["moonscript"]().
  2. Within the function at package.preload['moonscript.base'], remove references to moon_loader, insert_loader, and remove_loader. This means removing their declarations, definitions, and entries in the returned table.
  3. Within the function at package.preload['moonscript'], remove the line _with_0.insert_loader().

The file is now ready for use, to be placed in automation/include within the Aegisub repo.


All files in this repository are licensed under various GPL-compatible BSD-style licenses; see LICENCE and the individual source files for more information. The official Windows and OS X builds are GPLv2 due to including fftw3.