Mailcap and piping

[Veljko]

Hi!

I set up my mailcap for various types of files, but some of them are not
recognized properly and it just says "application/octet-stream" despite
the fact it is .jpg of .pps or something like that. What I want to do in
that case is to pipe attachment to apropriate application. What is the
right way to do it? I tried something like:
vlc %s 
but it doesn't work.