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Due to a misplaced comma this config switch was broken.
A follow-up commit will change our autoconf-style in a way, that should
make it harder for errors like this one to slip in.

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libass is a portable subtitle renderer for the ASS/SSA (Advanced Substation Alpha/Substation Alpha) subtitle format. It is mostly compatible with VSFilter.

Get it

See GitHub releases for the latest release 0.15.0 (released 2020-10-27). See the changelog for a detailed list of changes.

Source code is available from our GitHub repository.


Please use the issue tracker to report bugs or feature requests. We have an IRC channel, too. Talk to us on

Related Links

The following projects/companies use libass:

Information about the ASS format:

Other ASS/SSA implementations:

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