FFmpeg tile cropping

Question

This image is splitted to 12 equal pieces. Is there any way to do such a work with ffmpeg?

Answer 1

Use

ffmpeg -loop 1 -i image.png -vf "crop=iw/3:ih/4:mod(n,3)*iw/3:trunc(n/3)*ih/4" -vframes 12 out%d.png

For full coverage of image, the image width has to be divisible by 3, and height by 4.

---

For square output, set crop height to crop width. The vertical crop leaves some space at top and bottom.

ffmpeg -loop 1 -i image.png -vf "crop=iw/3:iw/3:mod(n,3)*iw/3:trunc(n/3)*iw/3+(ih-iw)/2" -vframes 12 out%d.png

(This method requires that ih/4 > iw/3 for desired output)