1---
2name: timing
3description: Interpolation and timing in Remotion—prefer interpolate with Bézier easing; springs as a specialized option
4metadata:
5  tags: easing, bezier, interpolation, spring, timing
6---
7 
8Drive motion with `interpolate()` over explicit frame range. To customize timing, use **`Easing.bezier`**. The four parameters are the same as CSS `cubic-bezier(x1, y1, x2, y2)`.
9 
10A simple linear interpolation is done using the `interpolate` function.
11 
12```ts title="Going from 0 to 1 over 100 frames"
13import { interpolate } from "remotion";
14 
15const opacity = interpolate(frame, [0, 100], [0, 1]);
16```
17 
18By default, the values are not clamped, so the value can go outside the range [0, 1].  
19Here is how they can be clamped:
20 
21```ts title="Going from 0 to 1 over 100 frames with extrapolation"
22const opacity = interpolate(frame, [0, 100], [0, 1], {
23  extrapolateRight: "clamp",
24  extrapolateLeft: "clamp",
25});
26```
27 
28## Bézier easing
29 
30Use `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.
31 
32```ts
33import { interpolate, Easing } from "remotion";
34 
35const opacity = interpolate(frame, [0, 60], [0, 1], {
36  easing: Easing.bezier(0.16, 1, 0.3, 1),
37  extrapolateLeft: "clamp",
38  extrapolateRight: "clamp",
39});
40```
41 
42### Examples (copy-paste curves)
43 
44**1. Crisp UI entrance (strong ease-out, no overshoot)** — slows nicely into the rest value; similar to many system “deceleration” curves.
45 
46```tsx
47const enter = interpolate(frame, [0, 45], [0, 1], {
48  easing: Easing.bezier(0.16, 1, 0.3, 1),
49  extrapolateLeft: "clamp",
50  extrapolateRight: "clamp",
51});
52```
53 
54**2. Editorial / slow fade (balanced ease-in-out)** — symmetric acceleration and deceleration over a hold-friendly move.
55 
56```tsx
57const progress = interpolate(frame, [0, 90], [0, 1], {
58  easing: Easing.bezier(0.45, 0, 0.55, 1),
59  extrapolateLeft: "clamp",
60  extrapolateRight: "clamp",
61});
62```
63 
64**3. Playful overshoot (control point y > 1)** — a little past the target then settles; use sparingly for emphasis.
65 
66```tsx
67const pop = interpolate(frame, [0, 30], [0, 1], {
68  easing: Easing.bezier(0.34, 1.56, 0.64, 1),
69  extrapolateLeft: "clamp",
70  extrapolateRight: "clamp",
71});
72```
73 
74## Preset easings (`Easing.in` / `Easing.out` / named curves)
75 
76Easing can be added to the `interpolate` function without a custom cubic:
77 
78```ts
79import { interpolate, Easing } from "remotion";
80 
81const value1 = interpolate(frame, [0, 100], [0, 1], {
82  easing: Easing.inOut(Easing.cubic),
83  extrapolateLeft: "clamp",
84  extrapolateRight: "clamp",
85});
86```
87 
88The default easing is `Easing.linear`.  
89Convexities:
90 
91- `Easing.in` — starting slow and accelerating
92- `Easing.out` — starting fast and slowing down
93- `Easing.inOut`
94 
95Named curves (from most linear to most curved):
96 
97- `Easing.quad`
98- `Easing.cubic` (good default when you do not need a custom cubic)
99- `Easing.sin`
100- `Easing.exp`
101- `Easing.circle`
102 
103### Easing direction for enter/exit animations
104 
105Use `Easing.out` for enter animations (starts fast, decelerates into place) and `Easing.in` for exit animations (starts slow, accelerates away). This feels natural because elements arrive with momentum and leave with gravity. When you need a specific curve from design, prefer a single `Easing.bezier(...)` instead of stacking presets.
106 
107## Composing interpolations
108 
109When multiple properties share the same timing (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:
110 
111```tsx
112const slideIn = interpolate(
113  frame,
114  [slideInStart, slideInStart + slideInDuration],
115  [0, 1],
116  {
117    easing: Easing.bezier(0.22, 1, 0.36, 1),
118    extrapolateLeft: "clamp",
119    extrapolateRight: "clamp",
120  },
121);
122const slideOut = interpolate(
123  frame,
124  [slideOutStart, slideOutStart + slideOutDuration],
125  [0, 1],
126  { easing: Easing.in(Easing.cubic), extrapolateLeft: "clamp", extrapolateRight: "clamp" },
127);
128const progress = slideIn - slideOut;
129 
130// Derive multiple properties from the same progress
131const overlayX = interpolate(progress, [0, 1], [100, 0]);
132const videoX = interpolate(progress, [0, 1], [0, -20]);
133const opacity = interpolate(progress, [0, 1], [0, 1]);
134```
135 
136The key idea: separate **timing** (when and how fast) from **mapping** (what values to animate between).
137