libass: libass is a portable library for SSA/ASS subtitles rendering. libass: libass: LibASS is a library that renders SSA/ASS subtitles. SSA stands for Sub libass: Station Alpha. It's the file format used by the popular subtitle libass: editor, SubStation Alpha. This format is widely used by fansubbers. libass: Advanced SubStation Alpha (ASS) is a script for more advanced libass: subtitles than SSA. libass: libass: libass: libass: