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>
15 lines
455 B
Common Lisp
15 lines
455 B
Common Lisp
;; Strobe effect - holds frames for choppy look
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;; @param frame_rate float [1, 60] default 12
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(define-effect strobe
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((frame_rate 12))
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(let* ((held (state-get 'held nil))
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(held-until (state-get 'held-until 0))
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(frame-duration (/ 1 frame_rate)))
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(if (or (= held nil) (>= t held-until))
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(begin
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(state-set 'held (copy frame))
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(state-set 'held-until (+ t frame-duration))
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frame)
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held)))
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