t@b ZS4 is advanced multi-track video editing and compositing software with more than 150 built-in video effects including excellent color and chroma keying tools, distortion effects, color adjusters, pattern generating effects and many others. Effect containers can be used to restrict the processing of contained video effects by shape or blending logic. Other features include custom video export size, number of tracks and sub-composites limited only by available memory, custom speed and directi