这是一款基于 LTX 2.3 多图关键帧引导 + PromptRelay 分段剧情控制 + 三阶段渲染打磨 的首尾帧视频生成应用。用户只需要上传一张 2×2 四宫格参考图，系统会自动将画面切成四张关键帧：左上、右上、左下、右下，然后通过 LTXVAddGuideMulti 把这些关键帧注入到视频生成的不同时间点，实现从首帧到中间过渡再到尾帧的连续视频生成。相比普通单图图生视频，它的核心优势是：不是只靠一张图让模型自由发挥，而是用多张关键帧控制剧情走向、角色位置和画面变化。
这条流还结合了 三阶段采样、Latent 放大、分块解码和 PromptRelay 长提示词，可以让多图之间的过渡更稳定，适合做角色变换、剧情连续镜头、首尾帧转场、四阶段故事视频、AI短剧分镜等内容。使用时建议用户重点控制三项：四宫格参考图决定画面变化，分段提示词决定剧情动作，关键帧引导强度决定过渡稳定性。
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