;; Blur effect - gaussian blur
;; Usage: python3 plan.py effects/blur.sexp -p radius=10 | python3 execute.py - -d . -o output.mp4
;;
;; Parameters:
;;   radius: blur radius in pixels (1 to 50, default: 10)
;;           higher = more blurry

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

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

  ;; Default parameter (overridden by -p radius=N)
  (def radius 10)

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