As of version 0.6.7, SMPlayer is distributed with a NSIS generated setup (previously Inno Setup). The installer is capable of downloading and installing the latest MPlayer and MPlayer codec packages during setup, although an alternative installer is available with MPlayer included for off-line installs.
Since SMPlayer is built with Qt and is based on MPlayer, this makes it quite portable, since MPlayer and Qt are already available on all major operating systems. On the operating systems on which SMPlayer has not yet been ported to, it is likely possible to run the application through binary compatibility with another Unix or Linux.
In addition to the Windows packages, official binary packages are provided for Ubuntu. Many distributions provide packages in their repositories.
For FreeBSD, SMPlayer is available for installation from source via the ports tree and also available as binary packages for most major FreeBSD releases.