这是一款基于 LTX 2.3 图生视频 + PromptRelay 分段剧情控制 + 三阶渲染打磨 + 双重 Latent 放大 的单/双人数字人视频应用。用户上传一张 人物首帧图，再填写 全局提示词 和 分段提示词，系统会根据参考图生成稳定的人物动态视频。它不是音频驱动版本，而是无音频版数字人生成：重点通过文字提示词控制人物动作、表情、互动、站位和镜头节奏，更适合做单人表演、双人互动、剧情分镜、AI短剧片段和无声口播素材。
这条流的核心优势是：单图定人物，PromptRelay 控剧情，三阶渲染稳画面。 第一阶段建立基础动态，第二阶段增强细节，第三阶段最终打磨，再配合 Latent Upsampler 和分块解码，让单人或双人画面更稳定、更细腻。相比普通图生视频，它更适合做“可控数字人演绎”，尤其适合固定镜头、固定人物、固定左右站位的单/双人短视频生成。使用时建议重点控制三项：人物首帧图决定身份，Global Prompt 决定整体规则，Local Prompts 决定每段动作和剧情。
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