;; Pixelate effect - reduce resolution with blocky pixels
;; Usage: python3 plan.py effects/pixelate.sexp -p block_size=16 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   block_size: pixel block size (2 to 64, default: 16)
;;               higher = more pixelated

(recipe "pixelate"
  :version "1.0"
  :encoding (:codec "libx264" :crf 20 :preset "medium" :audio-codec "aac" :fps 30)

  (effect pixelate :path "sexp_effects/effects/pixelate.sexp")

  ;; Default parameter (overridden by -p block_size=N)
  (def block_size 16)

  (def video (source :path "monday.webm"))
  (def clip (-> video (segment :start 0 :duration 10)))
  (def result (-> clip (effect pixelate :block_size block_size)))
  result)