VLC could not decode the format "ssa " (SubStation Alpha subtitles)

I have installed the latest version of VLC (2.2.8) on Trisquel 7.0 using Guix. It works normally with .srt files but cannot open .ass files. I tried installing libass but it still doesn't work.

Re: VLC could not decode the format "ssa " (SubStation Alpha subtitles)

u. try > adding it there. > > On 13.03.2018 03:01, Dang Duong wrote: > > My video.scm already has libass. I tried removing and reinstalling VLC > > but it doesn't work. > > Am I missing something? > > > > On Mon, Mar 12, 2018 at 5:14 PM, Ludovic Courtès