libass: LibASS (A portable SSA/ASS subtitle renderer) libass: libass: Libass is a portable library for SSA/ASS subtitles rendering. libass: SubStation Alpha (or Sub Station Alpha), abbreviated SSA, is a libass: subtitle file format created by Kotus that allows for more advanced libass: subtitles than the conventional SRT and similar formats. libass: libass: libass: libass: libass: Packaged by Georgi D. Sotirov