这是一款基于 Wan2.1 的长视频扩展应用。
上传一张首帧参考图，并按行填写分段提示词，应用会按照你的每一行描述依次生成新的视频段落，并自动把上一段最后一帧接到下一段继续生成，最终输出一条更长、更完整的连续视频。它适合做“第一段这样动，第二段继续推进，第三段再变化”的连续镜头生成。
推荐这样使用：
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首帧参考图尽量选择单主体、清晰、构图明确的图片
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分段提示词建议一行写一段，按时间顺序填写
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每行尽量突出动作、镜头和氛围变化，不要互相冲突太大
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更适合连续动作延展，不适合每一段都完全换主体
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想让结果更稳定，可以强调“主体一致、动作连贯、画面稳定、光影自然”
推荐输入示例：
第一行：主体自然站立，轻微转头，镜头缓慢推进，动作连贯
第二行：主体继续向前移动，衣摆摆动，情绪增强，镜头继续靠近
第三行：主体完成最终动作，节奏收束，画面稳定停留，结尾过渡自然
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