The program has a confusing interface but after a period of adaptation you will find a lot of utilities in this application like the big quantity of available effects and filters or the possibility to edit audio or images independently.
Zwei-Stein can import AVI, WAV, MPG, BMP and JPG files. In case you have to import a file of another extension, it will be necessary to convert them with another extern application. Additionally, the program allows you to include a lot of files in the same project, so you can make a very complete edition.
The final result of your projects can be exported in AVI, RM, WAV, WMV or BMP, according to the type of final file you want. Furthermore, the videos as well as the audios can be configured according to the quality and compression you want.
And all of this at an exceptional price... free!