这是一款基于 LTX2.3 Dev-Dare merged distilled 1.1 + IC Outpaint LoRA + 视频帧预处理 + Resize / Pad 扩宽画布 + LTXAddVideoICLoRAGuide 原视频参考引导 + LTX 视频采样 + 分块解码输出 的竖屏视频扩宽应用。用户上传一段竖屏视频后，系统会读取原视频帧，把画面扩展到更宽的横版比例，并用 IC Outpaint LoRA 生成左右缺失区域，让竖屏素材尽量自然变成横屏视频。
这条流的核心优势是：不是简单拉伸，也不是裁切，而是生成式补画面。 它适合把竖屏口播、竖屏人物视频、手机拍摄素材、短视频片段、直播切片、AI数字人视频、竖屏MV和竖屏产品视频扩成横版 16:9。相比普通扩图，它处理的是视频帧，需要尽量保持人物主体、背景光影、镜头运动和帧间连续性。当前文件虽然标题带 OmniNFT / Relay，但实际主链路没有看到对应节点，所以发布时建议主打 IC Outpaint 视频扩宽，不要主打 OmniNFT / Relay，除非后续补齐节点并测试。使用时建议重点控制四项：输入视频决定原始主体，输出宽高决定扩宽比例，扩宽提示词决定补全内容，暗场修正开关决定暗色视频能否稳定扩出边缘。
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