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fisheye-motion

制作屏摄风格的鱼眼畸变效果与聚焦动画:桶形鱼眼畸变 + 细扫描线/摩尔纹干涉 + 四周暗角, 可对任意图片/视频做「推镜聚焦到某处 + 黄色标注块滑入」的 Remotion 视频输出。核心是 clone https://github.com/vibe-motion/fisheye-motion 项目并按需改参数渲染。

触发词:鱼眼、fisheye、屏摄、摩尔纹、moire、扫描线、CRT、暗角、vignette、 聚焦推镜、高亮标注动画、screen-photo effect。

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See how to install

Files included (3)

  • SKILL.md4.6 KB
  • agents/openai.yaml744 B
  • assets/fisheye-demo.gif1.6 MB

SKILL.md (original)

Review the instructions the agent will receive before you install.

Fisheye Motion(鱼眼畸变 + 摩尔纹 + 暗角)

把一张图片(或视频)做成「用手机拍屏幕」的质感:以聚焦点为中心的桶形鱼眼畸变、 跟随画面弯曲的扫描线与固定屏幕扫描线干涉出的摩尔纹、四周暗角; 并可输出「推镜聚焦到目标区域 + 黄色标注块从左滑入」的 Remotion 视频。

工作流程

本 skill 不内置代码,所有实现都在独立仓库里。第一步永远是 clone 项目:

git clone https://github.com/vibe-motion/fisheye-motion.git
cd fisheye-motion

仓库结构:

  • 根目录:Vite + React 交互测试应用(拖图、点击/拖动移动聚焦、导出 PNG)
  • src/lib/FisheyeRenderer.js:与框架无关的 WebGL 渲染器(核心,全部效果的 shader 在这里)
  • src/lib/FisheyeView.jsx:React 组件封装
  • vibe-motion-app/:Remotion 项目,输出聚焦推镜 + 标注滑入的视频

然后根据用户需求走两条路之一。

路线 A:静态效果 / 交互预览(Vite 应用)

npm install
npm run dev
  • 默认加载 public/test.jpg;把用户的图放进 public/ 或直接拖入页面。
  • 点击/拖动画面改变聚焦(畸变中心);「导出 PNG」保存当前效果帧。
  • 要在自己的 React 项目里复用,直接拷 src/lib/ 两个文件,用法见仓库 README。

路线 B:视频输出(Remotion 项目)

cd vibe-motion-app
pnpm install          # postinstall 自动准备 headless 浏览器
pnpm run dev          # Remotion Studio 预览
  1. 把用户的源图放到 vibe-motion-app/public/ 下。
  2. 改 motion/config.js:
    • imageSrc:public 下的文件名
    • videoWidth / videoHeight:按源图等比取偶数尺寸
    • focusFrom → focusTo:聚焦推镜起止点(0..1 源图坐标,y 向下)
    • rect:标注块位置 { x, y, w, h }(0..1 源图坐标)、颜色、混合模式
    • 时间轴:focusStartSec/focusEndSec(推镜段)、maskStartSec/maskEndSec(标注滑入段)、durationSeconds
  3. 渲染:
# 透明 ProRes 4444 mov(默认)
pnpm run remotion:render

# H.264 mp4
REMOTION_OUTPUT=out/fisheye.mp4 REMOTION_CODEC=h264 REMOTION_PIXEL_FORMAT=yuv420p pnpm run remotion:render
  1. 需要 GIF 预览时用 ffmpeg 转:
ffmpeg -i out/fisheye.mp4 -vf "fps=15,scale=540:-1:flags=lanczos,palettegen" /tmp/p.png
ffmpeg -i out/fisheye.mp4 -i /tmp/p.png -lavfi "fps=15,scale=540:-1:flags=lanczos[x];[x][1:v]paletteuse=dither=bayer:bayer_scale=4" out/fisheye.gif

定位目标区域(rect / focusTo)

用户通常会说「聚焦到 XX 文字/按钮上」。定位方法:

  1. 用多模态视觉读源图,估计目标区域的 0..1 归一化坐标(y 向下)。
  2. focusTo 取该区域中心;rect 框住目标,稍留 padding。
  3. 渲染一帧检查(Studio 里拖时间轴,或 REMOTION_OUTPUT=out/check.png 配合单帧渲染), 不准就微调坐标重来。畸变会弯曲画面,最终以渲染结果为准。

参数速查

参数默认说明
strength1.6畸变强度,0 = 无畸变,p' = p·(1 + strength·r²) / zoom
zoom2中心缩放(配合聚焦推镜)
moire{ intensity: 0.28, scale: 900, angle: 0 }摩尔纹强度/频率/角度
vignette{ amount: 0.85, radius: 0.72, softness: 0.45 }暗角
rect.blendscreen深色底图白字用 screen;浅色底图深字用 multiply(荧光笔效果)

注意事项

  • Remotion 并行/乱序渲染帧,动画量必须每帧独立计算——已由 motion/timeline.js 保证, 改动画逻辑时保持这一约束,不要引入跨帧状态。
  • 场景用 WebGL shader,headless 渲染需要 --gl angle,渲染脚本已默认设置。
  • 视觉效果非必要不跑自动化验证,渲染后目测(或发关键帧给用户确认)。

效果示例

聚焦推镜到「浙大」二字并滑入黄色标注(assets/fisheye-demo.gif):

<img src="assets/fisheye-demo.gif" alt="fisheye focus demo" width="480" />

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