用 Seedance 2.5 做视频人物替换的实操心得

参考视频偶尔会被平台拒收，解决办法是先用 Codex 把人脸模糊后再重新提交。实测中一次替换两个角色效果最好，作者是先替换两位人物，再跑一轮换第三位。

提示词的关键是让视频只提供动作、表情和镜头语言，图片只提供身份和服装，并要求保留原始表演。

Okay I think I've cracked the code on these. Seedance 2.5 is very good if you upload a reference video + images of new characters and ask to swap. In some cases the ref video will get rejected - so I just ask Codex to blur the faces and resubmit 😂 It's also best doing two characters at a time. For this one I did Dario and Jensen first and then re-ran it with Sam. Prompt below. Edit the entire source video @ Video1. Replace the viewer's FAR RIGHT performer with the man in @ Image1 in the same pink shirt and blue / gray hoodie. Keep the LEFT and MIDDLE performers the same. The photos provide identity and wardrobe only. The video provides motion, expressions, gestures, timing, interactions, camera cuts, framing, lighting and background. Preserve the original performance as faithfully as possible. Do not swap positions or invent new movement or scene elements.

本条情报归属 AITOP「技巧」核心栏目，重点聚焦中国 AI 产业与国产大模型生态。在跨区域产业观察坐标中，该动态直接关联「AI 开发者工具链、Coding Agent 与工程化实践」研究主线，反映出当前技术演进与商业落地的最新风向。涉及核心实体与技术议题包括：Seedance 2.5、视频生成、提示词工程、人物替换，读者可通过下方标签进入对应专题页查阅历史脉络与关联对比。

信源核验说明：本文原始线索采编自「Justine Moore」（@venturetwins），经 AITOP 多维评分管线结构化提炼。截至目前，全网已有 2 家独立信源对该事件进行交叉印证与跟进报道（含 Pika Labs 等），属于近期高关注度行业信号。