docker-compose build
docker-compose run --rm butterflow

usage reminder:

cd data

A=Invideo.mp4
B=Outvideo.mp4

butterflow -v -vs 0.33 --poly-s=1.8 -s a=15.00,b=17.58,spd=0.25 $A -o $B

-vs == scale

--poly-s == rate of blend vs. warp, higher == warp more

-s a=start,b=end,spd=speed-ratio

-o output