[FFmpeg-user] Large Video Project

[Michael Koch]

> It's possible.
>
> For a single image every 240 frames, assuming a frame rate of 60, you can
> exploit the select filter as shown:
>
> ffmpeg -i input -filter:v 'select=not(mod(n\,240))' image%02d.png

%02d means the images have a 2-digit number in the filename. For a 6TB 
video, larger numbers will be required, for example %06d

Another way to do the same thing is to specify an output frame rate of 
0.25 (4 seconds from one image to the next):

ffmpeg -i input -vf fps=0.25 image%06d.jpg

Michael