Stereoscopic movie production has been a topic in the making of films for a long time. However, it hasn't made it to the amateur sector. Commercially available stereoscopic cameras are too expensive for non professionals. When producing a stereo video with two separate standard cameras, synchronicity and spatial offset maintenance between the two views is a challenging non-trivial task. Even when this is done properly, the general lack of software-tools for stereo video post production definitely daunts any non-professional ambitions. In this work we present a tool for preprocessing stereoscopic videos. We describe how the input videos can be converted automatically to a stereo-movie, ready for displaying or further processing in standard video software.