I have to agree with the previous poster, cinelerra is the way to go, if you want or need professional capabilities.What's more is that cinelerra package is available within the standard CrunchBang repositories.
Phoronix: Cinelerra 4.5 Is Silently Available For Video Editing
Cinelerra, one of the popular open-source video editors and compositors for Linux, hadn't seen an official update since July of 2012 but pushed this week was a source package for their next major release...
But that led to the problem that the package "libmpeg3cine" could not be installed because some files were already installed by package "mpeg3-utils". The package system seemed broken because of a defective package.