reszta poprawek

.claude/skills/remotion-markup/timing.md

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+---
+name: timing
+description: Interpolation and timing in Remotion—prefer interpolate with Bézier easing; springs as a specialized option
+metadata:
+  tags: easing, bezier, interpolation, spring, timing
+---
+
+Drive motion with `interpolate()` over an explicit frame range. Prefer `interpolate()` over `spring()` unless the user explicitly asks for physics-based motion. To customize timing, use **`Easing.bezier`**. The four parameters are the same as CSS `cubic-bezier(x1, y1, x2, y2)`.
+
+A simple linear interpolation is done using the `interpolate` function.
+
+```ts title="Going from 0 to 1 over 100 frames"
+import { interpolate } from "remotion";
+
+const opacity = interpolate(frame, [0, 100], [0, 1]);
+```
+
+By default, the values are not clamped, so the value can go outside the range [0, 1].  
+Here is how they can be clamped:
+
+```ts title="Going from 0 to 1 over 100 frames with extrapolation"
+const opacity = interpolate(frame, [0, 100], [0, 1], {
+  extrapolateRight: "clamp",
+  extrapolateLeft: "clamp",
+});
+```
+
+## Studio-editable animation patterns
+
+When an animation should be editable in Remotion Studio, keep the `interpolate()` call directly in the `style` prop and prefer individual CSS transform properties:
+
+```tsx
+// 👍 Inline editable keyframes and transform shorthands
+style={{
+  scale: interpolate(frame, [0, 100], [0, 1]),
+  translate: interpolate(frame, [0, 100], ["0px 0px", "100px 100px"]),
+  rotate: interpolate(frame, [0, 100], ["20deg", "90deg"]),
+}}
+
+// 👎 Hidden values and transform strings become computed in Studio
+const translateY = interpolate(frame, [0, 100], [0, 120]);
+const rotation = interpolate(frame, [0, 100], [0, 20]);
+
+style={{
+  transform: `translateY(${translateY}px) rotate(${rotation}deg)`,
+}}
+```
+
+Use `transform` strings only when individual CSS transform properties do not cover the effect, such as `skew()`, `perspective()`, or order-sensitive multi-transform chains.
+
+## Bézier easing
+
+Use `Easing.bezier(x1, y1, x2, y2)` inside the `interpolate` options object. The curve is identical in spirit to CSS animations and transitions, which helps when you are stealing timing from the web or from a designer’s spec.
+
+```ts
+import { interpolate, Easing } from "remotion";
+
+const opacity = interpolate(frame, [0, 60], [0, 1], {
+  easing: Easing.bezier(0.16, 1, 0.3, 1),
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+});
+```
+
+### Examples (copy-paste curves)
+
+**1. Crisp UI entrance (strong ease-out, no overshoot)** — slows nicely into the rest value; similar to many system “deceleration” curves.
+
+```tsx
+const enter = interpolate(frame, [0, 45], [0, 1], {
+  easing: Easing.bezier(0.16, 1, 0.3, 1),
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+});
+```
+
+**2. Editorial / slow fade (balanced ease-in-out)** — symmetric acceleration and deceleration over a hold-friendly move.
+
+```tsx
+const progress = interpolate(frame, [0, 90], [0, 1], {
+  easing: Easing.bezier(0.45, 0, 0.55, 1),
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+});
+```
+
+**3. Playful overshoot (control point y > 1)** — a little past the target then settles; use sparingly for emphasis.
+
+```tsx
+const pop = interpolate(frame, [0, 30], [0, 1], {
+  easing: Easing.bezier(0.34, 1.56, 0.64, 1),
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+});
+```
+
+## Studio-editable easing curves
+
+Use an explicit `Easing.bezier()` curve instead of composed presets such as `Easing.inOut(Easing.cubic)`. Explicit Bézier control points remain editable in Remotion Studio.
+
+```ts
+import { interpolate, Easing } from "remotion";
+
+const value1 = interpolate(frame, [0, 100], [0, 1], {
+  easing: Easing.bezier(0.645, 0.045, 0.355, 1),
+  extrapolateLeft: "clamp",
+  extrapolateRight: "clamp",
+});
+```
+
+The default easing is `Easing.linear`.
+
+### Easing direction for enter/exit animations
+
+Use an ease-out Bézier curve for enter animations (starts fast, decelerates into place) and an ease-in Bézier curve for exit animations (starts slow, accelerates away). This feels natural because elements arrive with momentum and leave with gravity.
+
+## Composing interpolations
+
+When multiple properties share the same timing and do not need Studio keyframe editing (e.g. a slide-in panel and a video shift), avoid duplicating the full interpolation for each property. Instead, create a single normalized progress value (0 to 1) and derive each property from it:
+
+```tsx
+const slideIn = interpolate(
+  frame,
+  [slideInStart, slideInStart + slideInDuration],
+  [0, 1],
+  {
+    easing: Easing.bezier(0.22, 1, 0.36, 1),
+    extrapolateLeft: "clamp",
+    extrapolateRight: "clamp",
+  },
+);
+const slideOut = interpolate(
+  frame,
+  [slideOutStart, slideOutStart + slideOutDuration],
+  [0, 1],
+  {
+    easing: Easing.bezier(0.333, 0, 0.667, 0),
+    extrapolateLeft: "clamp",
+    extrapolateRight: "clamp",
+  },
+);
+const progress = slideIn - slideOut;
+
+// Derive multiple properties from the same progress
+const overlayX = interpolate(progress, [0, 1], [100, 0]);
+const videoX = interpolate(progress, [0, 1], [0, -20]);
+const opacity = interpolate(progress, [0, 1], [0, 1]);
+```
+
+The key idea: separate **timing** (when and how fast) from **mapping** (what values to animate between).
+
+If the values should be visually keyframed in Studio, prefer inline `interpolate()` calls in the relevant style props, even if it duplicates the timing.