VapourSynth
A video processing framework with simplicity in mind.
5 Alternatives To VapourSynth
AVS Video ReMaker
Split video into several segments, delete certain segments, save as many segments as you want
Boilsoft Video Splitter
Boilsoft Video Splitter is an efficient Video Cutter, AVI Splitter, MPEG Splitter, MPEG Cutter, AVI Cutter to cut/split/trim video files into smaller clips. Support AVI, MPEG, RM, ASF, WMV, 3GP, MKV, FLV formats.
Lumiera
Lumiera is NonLinear Video Editing (NLE) for GNU/Linux developed by the CinelerraCV community.
Video Enhancer
Resize video to HD or 4K with Video Enhancer - a tool implementing motion-based super-resolution method for upsizing video. Use 200+ filters for video processing: denoising, deblocking, subtitler, color correction etc.
WAX
Wax is a high performance and flexible video compositing and special effects software.