The way in which a film is promoted can have a huge effect on whether or not it is successful. Films are expensive to make and if the public do not buy tickets at the box office to see the film, a lot of money will be lost.
Film-making in Nigeria is divided largely along regional, and marginally ethnic and religious lines. Thus, there are distinct film industries – each seeking to portray the concern of the particular section and ethnicity it represents. However, there's the English-language film industry which is a melting pot for filmmaking and filmmakers from most of the regional industries.
Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure. Generally, it compensates for pan and tilt (angular movement, equivalent to yaw and pitch) of the imaging device, though electronic image stabilization can also compensate for rotation. It is used in image-stabilized binoculars, still and video cameras, astronomical telescopes, and also smartphones, mainly the high-end. With still cameras, camera shake is a particular problem at slow shutter speeds or with long focal length (telephoto or zoom) lenses. With video cameras, camera shake causes visible frame-to-frame jitter in the recorded video. In astronomy, the problem of lens-shake is amplified by variation in the atmosphere, which changes the apparent positions of objects over time.
A preview performance refers to a showing of a film to a select audience, usually for the purposes of corporate promotions, before the public film premiere itself. Previews are sometimes used to judge audience reaction, which if unexpectedly negative, may result in recutting or even refilming certain sections based on the audience response.