Why doctors strike (a med student's perspective)
reddit.com1 pointsby b1gtuna1 comments
ffmpeg -i my_vid.mp4 -vf "select=not(mod(n\,600))" -vsync vfr -q:v 15 img_%03d.jpg
To make a montage that's 1024 px wide: for d in \*
do
(montage -mode concatenate -tile 4x -resize 1024x $d"/\* "$d".jpg)
done