1- Can select video from your phone or record a new one immediately by your phone camera.
2- You can set the video speed from 10% up to 200%.
3- Simple and easy to use.
4- Free to download everywhere.
5- Built using FFMPEG great media library
6- Smart and simple user interface.
Uses FFmpeg under permission of LGPL.
– Hot fixes for issues on improvements
Fast & Slow Motion Video Maker