;; RGB split effect - chromatic aberration
;; Usage: python3 plan.py effects/rgb_split.sexp -p offset_x=20 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   offset_x: horizontal color channel offset in pixels (2 to 50, default: 20)

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

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

  ;; Default parameter (overridden by -p offset_x=N)
  (def offset_x 20)

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