Welcome

slowmoVideo is an OpenSource program that creates slow-motion videos from your footage.

But it does not simply make your videos play at 0.01?? speed. You can smoothly slow down and speed up your footage, optionally with motion blur.

How does slow motion work? slowmoVideo tries to find out where pixels move in the video (this information is called Optical Flow), and then uses this information to calculate the additional frames between the ones recorded by your camera.

Features

Videos in any format supported by ffmpeg can be loaded. Image sequences can also be loaded, so, if you did a timelapse with too few frames, slowmoVideo may help as well.

can be loaded. Image sequences can also be loaded, so, if you did a timelapse with too few frames, slowmoVideo may help as well. slowmoVideo does not work with a constant slowdown factor but with curves that allow arbitrary time accelereation/deceleration/reversal.

Motion blur can be added, as much as you want.

Technologies

These parts are used by slowmoVideo:

Qt5 as C++ programming framework

OpenCV and GPU-KLT+FLOW for calculating the optical flow

ffmpeg for reading and writing video files

Thesis

I wrote slowmoVideo as my bachelor thesis at ETH Z??rich. The thesis can be read here (PDF, 2 MB).