Choose the deck's shots to blur.

Sets which shots are blurred: { units: [{ unit, shots? }], strength?, off? } — unit is the chapter's chapterIndex, shots its shot numbers from the read, moving (the default: every shot where nobody speaks on camera) or [] to clear it; chapters not listed keep their choice; off: true clears every choice. Refused (400, one sentence naming the fix): a chapter with no cut, a shot number it does not have, a choice over 300 seconds. Motion blur makes chosen shots move like film: what moves in them blurs the way a camera's shutter blurs it, while still frames, faces held in frame and straight edges stay sharp. It is chosen per shot (or per chapter or beat: its moving shots, never a shot where someone speaks on camera unless that shot is named), at one of two strengths (standard, subtle; standard by default). It is free, up to 300 seconds of blurred picture per deck or trailer, and it is laid when the master is assembled, before the film finish. The sound and timing are never touched. Allowed in any state: before a master the choice is kept for the first assembly; in review, finishing or complete the master is assembled again with it (reassembling). Requires Idempotency-Key. Scope: story:write.