406cc7c0c7
Add S-expression based video effects pipeline with modular effect definitions, constructs, and recipe files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
35 lines
1.2 KiB
Common Lisp
35 lines
1.2 KiB
Common Lisp
;; ASCII art effect - render as text characters (music reactive)
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;; Usage: python3 plan.py effects/ascii_art.sexp | python3 execute.py - -d . -o - | mpv --fs -
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;;
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;; Parameters:
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;; color_mode: coloring mode ("color", "green", "white", default: "color")
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;; char_size is bound to energy (wobbles with overall loudness)
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(recipe "ascii_art"
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:version "1.0"
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:encoding (:codec "libx264" :crf 20 :preset "medium" :audio-codec "aac" :fps 30)
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(effect ascii_art :path "sexp_effects/effects/ascii_art.sexp")
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(analyzer energy :path "../artdag-analyzers/energy/analyzer.py")
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;; Default parameter
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(def color_mode "color")
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(def video (source :path "monday.webm"))
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(def audio (source :path "dizzy.mp3"))
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(def clip (-> video (segment :start 0 :duration 10)))
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;; Audio from 60s where it's louder
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(def audio-clip (-> audio (segment :start 60 :duration 10)))
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;; Analyze just the audio clip - times are 0-10s relative to clip
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(def energy-data (-> audio-clip (analyze energy)))
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;; char_size bound to energy - no offset needed since analysis is on clip
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(def result (-> clip
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(effect ascii_art
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:char_size (bind energy-data values :range [2 32])
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:color_mode color_mode)))
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(mux result audio-clip))
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