Frameserving is a process by which you directly transfer video data from one program on your computer to another, with no intermediate or temporary files created. The program that opens the source file and outputs the video data is called the frameserver. The program that receives the data could be any type of video application. Frameserving a video can save on disk space and also increase compatibility by enabling you to open a file in an application that wouldn’t normally support it. [Adapted from AviSynth]