| From: Tim <ignored_mailbox(a)yahoo.com.au>
| I am curious why there's a need to do this externally. Both mkisofs and
| cdrecord have "padding" options. Do they not do the trick?
Good question.
I think that the cdrecord padsize= option can be used. It is pretty
hard to make out what it does from the man page.
The padding stuff in growisofs will not work with a .iso file. It
only works when creating a new .iso (if then).
In any case, I actually burn with k3b these days and I don't remember
that it has a way of requesting padding. So I use isopad before k3b.
All this is based on superstition, so there may well be better approaches.