FYI, the SUPER converter mentioned in the body of the topic above has been removed from TPFC's database, but many portabilized versions of programs mentioned in this topic can be found at ThumbApps.org.
EDIT: a rather interesting newcomer is Python based Flowblade (http://jliljebl.github.io/flowblade/) -- unfortunately, the following is what the homepage currently says about non-Linux versions...
EDIT2: another highly related and relevant topic is at viewtopic.php?t=22930 ...http://jliljebl.github.io/flowblade/download.html wrote:Windows and OS X are not supported. Flowblade has focused on providing the best possible experience on Linux and other free platforms.
And for a portable launcher for pcfreetime.com Format Factory, see viewtopic.php?t=21279.
Lastly, some time ago yet another conversion utility called QtlMovie was posted to "Submissions" at viewtopic.php?t=23111.