Screenshot of AviSub: AviSub is an freeware tool that can mux up to three [srt/sub/txt(microdvd) or vo About : AviSub is an freeware tool that can mux up to three [srt/sub/txt(microdvd) or vobsubs] subtitle streams on an avi file. Generates an *.divx file with embed xsubs. Uses the latest tecnology of the divx6 codec.