人像靜止 · 世界流動

Seedance 2.0寫實創意特效縮時攝影5秒
中心人物紋絲不動如雕像,只有背景人潮車流在流動。Mannequin Challenge 的反向操作。
PROMPT · Seedance 2.0 提示词
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讓畫面中央的人物完全靜止不動,如雕像一般凝固。只讓周圍的背景和人物快速運動,並帶有強烈的動態模糊,圍繞靜止的主體營造出動態的縮時攝影效果。鏡頭必須保持完全固定。
✍️ 編輯解析

核心诉求就一句「keep the central person completely motionless」,人物冻结、背景高速流动、镜头绝对固定,三个约束互相较劲,其实是在考模型的分层运动控制能力。Seedance 2.0在角色一致性和背景动态渲染上底子不错,但这种反差极大的静止/运动对比对时序稳定性要求很高,短短一句话信息密度太低,很容易在长镜头里让「冻结」的人物自己漂移或眨眼。标need_expanded就是冲着这个雷区去的,细节不补全,模型大概率会自己脑补出摇晃感。

想要更強的畫面控制?編輯擴寫參考版(非原詞,僅供借鑑):
Keep the central person completely motionless and frozen like a mannequin — no blinking, no breathing motion, no clothing sway — for the entire duration of the shot. Around this fixed anchor, the background and every other person in frame move at high speed with heavy directional motion blur: pedestrians streak past like ghosts, vehicles blur into light trails, hair and banners of passersby whip violently. The contrast should feel almost supernatural, as if the subject exists outside of time while the world races forward around them. The camera itself must remain locked on a static tripod position — no pan, no tilt, no dolly, no handheld micro-shake whatsoever. Lighting stays consistent and unaffected by the motion blur, so the frozen figure reads crisp, sharp, and perfectly still against the smeared, chaotic environment throughout the entire sequence.
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