Package: xorriso Version: 1.5.4-2 ISO9660 and Joliet store their volume labels separately. Given that they have different limitations, I suggest letting the user supply them separately.
ISO9660 volume labels can be up to 32 characters long, but are uppercase-only, alphanumerical only, and use underscores instead of spaces. Joliet labels support more different characters but can only be 16 characters long. ImgBurn on Windows already allows supplying separate volume labels.

