Chuyển nhịp kiểu sakuga

Mọi thứ trên trang này đều có bản máy đọc. Đưa agent link JSON, hoặc thêm MCP server gimgs rồi bảo nó tìm motion template.

1. Tải JSON — trong đó có công thức cảnh quay (timing, easing, bảng tham số, lỗi hay gặp) và toàn bộ source TSX.
2. Clone repo video-shotcraft; component import fixture chung từ demos/_fixtures và helper từ assets/lib.
3. Đăng ký component thành <Composition> trong project Remotion rồi render bằng `npx remotion render`, hoặc dựng lại công thức bằng engine của bạn.

curl -s https://gimgs.net/motion/sakuga-timing-shift.json

git clone https://github.com/Vincentwei1021/video-shotcraft
# component: demos/rhythm/sakuga-timing-shift/SakugaTimingShift.tsx
npx remotion render <CompositionId> out.mp4

claude mcp add --transport http gimgs https://gimgs.net/mcp
# then: search_motion_templates / get_motion_template("sakuga-timing-shift")

Use the video-shotcraft shot recipe "Chuyển nhịp kiểu sakuga" (Remotion composition, Apache-2.0) published on gimgs.net.
Recipe JSON (prompt = timing/easing/parameter table/pitfalls, files = TSX source): https://gimgs.net/motion/sakuga-timing-shift.json
Raw TSX: https://gimgs.net/motion/sakuga-timing-shift/template.html
Repository: https://github.com/Vincentwei1021/video-shotcraft  (component: demos/rhythm/sakuga-timing-shift/SakugaTimingShift.tsx; imports demos/_fixtures and assets/lib)
Spec: 1920x1080, 30 fps, 5.06s

1. Read the JSON and follow its "prompt" section (when to use, intention, parameter table, known pitfalls).
2. Adapt it for: <describe what you want>.
3. Either clone the repo, register the component as a <Composition> in a Remotion project and run npx remotion render <CompositionId> out.mp4 — or re-implement the recipe in your own engine (HTML/WAAPI works: keep the same timing and easing).

JSON · Markdown · llms.txt

// ===== demos/rhythm/sakuga-timing-shift/SakugaTimingShift.tsx =====
// sakuga-timing-shift —— 一拍三转一拍一（作画打拍切换）
// 0–48f：驱动帧 q = floor(f/3)*3，卡从左侧顿挫横移到右侧（10fps 手翻书感），
// 每步 ≈74px + rotate 摆动 = 一拍三的钝感；48f 切换点后改用原始 f 连续驱动，
// 48–75f 丝滑冲刺折返中央（out-poly(4) 高初速 + 运动拉伸 scaleX + 残影），
// 过冲 36px 后 3f 回弹落位。左上角标 "on 3s"/"on 1s" 随段切换并带 line-boil
// （boil 在 f=108 后冻结）。收尾真静止 ≥40f。
import React from 'react';
import { useCurrentFrame, interpolate, Easing } from 'remotion';
import { G, Card, TitleBlock } from '../../_fixtures/Fixtures';

const W = 1920;
const CARD_W = 420;
const CARD_H = 260;
const CARD_Y = (1080 - CARD_H) / 2; // 410

const X_LEFT = 120;
const X_RIGHT = 1380; // 卡左缘，右侧停点
const X_CENTER = (W - CARD_W) / 2; // 750，中央落位
const OVERSHOOT = 36;

const SWITCH = 48; // 打拍切换帧
const ARRIVE = 70; // 冲刺到过冲点
const SETTLE = 75; // 回弹落位完成

// 段一：一拍三。位置函数线性，但只在 q = floor(f/3)*3 上取值。
const pos1 = (t: number): number =>
  interpolate(t, [0, SWITCH], [X_LEFT, X_RIGHT], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });

// 段二：一拍一。out-poly(4) 高初速冲刺 → 过冲 → 3f 回弹。
const pos2 = (t: number): number =>
  interpolate(t, [SWITCH, ARRIVE, SETTLE], [X_RIGHT, X_CENTER - OVERSHOOT, X_CENTER], {
    easing: Easing.out(Easing.poly(4)),
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });

export const SakugaTimingShift: React.FC = () => {
  const f = useCurrentFrame();
  const onThrees = f < SWITCH;

  // ---- 卡片位置 ----
  const q = Math.floor(f / 3) * 3; // 一拍三驱动帧
  const x = onThrees ? pos1(q) : pos2(f);

  // 顿挫段 rotate 摆动（随 q 冻结，一步一个姿势）
  const rot = onThrees
    ? Math.sin(q * 0.7) * 5
    : interpolate(f, [SWITCH, SWITCH + 8], [Math.sin(SWITCH * 0.7) * 5, 0], {
        extrapolateLeft: 'clamp',
        extrapolateRight: 'clamp',
      });

  // 冲刺段速度（位置差分，帧时间解耦）→ 运动拉伸
  const v = onThrees ? 0 : Math.abs(pos2(f) - pos2(f - 1));
  const sFac = Math.min(v / 55, 1);
  const stretchX = 1 + 0.35 * sFac; // 峰值 ≈1.35，横向拉丝
  const stretchY = 1 - 0.12 * sFac;

  // 落位急停回弹：72–78f scaleX 压扁再回 1
  const sqX = interpolate(f, [SETTLE - 3, SETTLE, SETTLE + 3], [1, 0.9, 1], {
    easing: Easing.out(Easing.cubic),
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });
  const sqY = interpolate(f, [SETTLE - 3, SETTLE, SETTLE + 3], [1, 1.07, 1], {
    easing: Easing.out(Easing.cubic),
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });

  // 冲刺残影：只在段二速度高时挂载（条件挂载，不留 opacity 0 的壳）
  const ghosts =
    !onThrees && f > SWITCH + 1 && f < ARRIVE + 2 && sFac > 0.15
      ? [
          { xg: pos2(f - 2), op: 0.28 * sFac },
          { xg: pos2(f - 4), op: 0.13 * sFac },
        ]
      : [];

  // ---- 角标 "on 3s" / "on 1s"，line-boil，f=108 后冻结 ----
  const h = (n: number) => {
    const s = Math.sin(n * 127.3) * 43758.5453;
    return s - Math.floor(s);
  };
  const qb = Math.min(Math.floor(f / 4) * 4, 108); // boil 驱动帧，108 后冻结
  const bx = (h(qb + 1) - 0.5) * 7;
  const by = (h(qb + 2) - 0.5) * 7;
  const brot = (h(qb + 3) - 0.5) * 3;
  // 切换瞬间角标弹一下
  const pop = interpolate(f, [SWITCH, SWITCH + 3, SWITCH + 9], [1, 1.35, 1], {
    easing: Easing.out(Easing.cubic),
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });

  const titleOp = interpolate(f, [0, 10], [0, 1], {
    extrapolateLeft: 'clamp',
    extrapolateRight: 'clamp',
  });

  return (
    <div style={{ width: 1920, height: 1080, background: G.bg, position: 'relative', overflow: 'hidden' }}>
      <div style={{ position: 'absolute', top: 90, width: '100%', textAlign: 'center', opacity: titleOp }}>
        <TitleBlock text="SAKUGA TIMING SHIFT" size={64} />
      </div>

      {/* 轨道基线 + 中央落位虚线槽 */}
      <div
        style={{
          position: 'absolute',
          left: 100,
          right: 100,
          top: CARD_Y + CARD_H + 24,
          height: 3,
          background: G.line,
          borderRadius: 2,
        }}
      />
      <div
        style={{
          position: 'absolute',
          left: X_CENTER,
          top: CARD_Y,
          width: CARD_W,
          height: CARD_H,
          border: `3px dashed ${G.bar}`,
          borderRadius: 14,
          boxSizing: 'border-box',
        }}
      />

      {/* 冲刺残影 */}
      {ghosts.map((g, i) => (
        <div
          key={`ghost-${i}`}
          style={{ position: 'absolute', left: 0, top: CARD_Y, opacity: g.op, transform: `translateX(${g.xg}px)` }}
        >
          <Card w={CARD_W} h={CARD_H} seed={4} />
        </div>
      ))}

      {/* 主卡 */}
      <div
        style={{
          position: 'absolute',
          left: 0,
          top: CARD_Y,
          transform: `translateX(${x}px) rotate(${rot}deg) scaleX(${stretchX * sqX}) scaleY(${stretchY * sqY})`,
          transformOrigin: '50% 50%',
        }}
      >
        <Card w={CARD_W} h={CARD_H} seed={4} />
      </div>

      {/* 角标：on 3s / on 1s */}
      <div
        style={{
          position: 'absolute',
          left: 120,
          top: 160,
          transform: `translate(${bx}px, ${by}px) rotate(${brot}deg) scale(${pop})`,
          transformOrigin: '0% 50%',
          fontFamily: 'Courier New, monospace',
          fontWeight: 700,
          fontSize: 84,
          color: G.ink,
          borderBottom: `6px solid ${G.ink}`,
          paddingBottom: 6,
        }}
      >
        {onThrees ? 'on 3s' : 'on 1s'}
      </div>
    </div>
  );
};

1. Read the recipe
   Prompt = when to use, intention, parameter table with typical values and how each one feels, known pitfalls. Treat values as calibrated starting points.
2. Get the code
   tool: git
   git clone https://github.com/Vincentwei1021/video-shotcraft && cd video-shotcraft && npm install
3. Register + render
   tool: remotion
   npx remotion render <CompositionId> out.mp4 # component: demos/rhythm/sakuga-timing-shift/SakugaTimingShift.tsx
4. Or re-implement
   Port the timing/easing from the recipe to HTML + WAAPI (gimgs motion contract) or any engine; keep the same segment windows and easing.