AviSynth

AviSynth is probably one of the best tools for editing script-based videos. In fact it is often used as a base tool for editing programs or converting video.

The program offers many tools to perform a complete and effective post production editing of any video.

AviSynth works with any application that supports AVI files. The program will allow you to establish a frame server (a program that takes images (frames) and passes them one at a time to another program).

It has integrated features in its library files for resizing, cropping, adding borders, decoding, etc.