;; Pixelsort effect - glitch art pixel sorting
;; Usage: python3 plan.py effects/pixelsort.sexp -p threshold_low=30 -p threshold_high=220 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   threshold_low: lower brightness threshold (0 to 128, default: 30)
;;   threshold_high: upper brightness threshold (128 to 255, default: 220)
;;                   pixels between thresholds get sorted

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

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

  ;; Default parameters (overridden by -p threshold_low=N -p threshold_high=N)
  (def threshold_low 30)
  (def threshold_high 220)

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