Caption Editorial Emphasis

1"use client";
2 
3import { Timegroup } from "@editframe/react";
4import type { CSSProperties } from "react";
5 
6export interface CaptionWord {
7  text: string;
8  start: number;
9  end: number;
10}
11 
12export interface CaptionEditorialEmphasisProps {
13  words?: CaptionWord[];
14  emphasisWords?: string[];
15  color?: string;
16  fontSize?: number;
17  fontWeight?: number | string;
18  emphasisScale?: number;
19  background?: string;
20  speed?: number;
21  fps?: number;
22  durationInFrames?: number;
23  width?: number;
24  height?: number;
25  className?: string;
26}
27 
28const DEFAULT_WORDS: CaptionWord[] = [
29  { end: 0.35, start: 0, text: "Every" },
30  { end: 0.65, start: 0.35, text: "great" },
31  { end: 1, start: 0.65, text: "video" },
32  { end: 1.45, start: 1.1, text: "starts" },
33  { end: 1.65, start: 1.45, text: "with" },
34  { end: 1.8, start: 1.65, text: "a" },
35  { end: 2.15, start: 1.8, text: "single" },
36  { end: 2.7, start: 2.15, text: "frame." },
37  { end: 3.2, start: 3, text: "No" },
38  { end: 3.9, start: 3.2, text: "timelines." },
39  { end: 4.2, start: 4, text: "No" },
40  { end: 4.5, start: 4.2, text: "drag" },
41  { end: 4.65, start: 4.5, text: "and" },
42  { end: 5.1, start: 4.65, text: "drop." },
43  { end: 5.55, start: 5.3, text: "Just" },
44  { end: 6, start: 5.55, text: "code." },
45];
46 
47const WORDS_PER_GROUP = 3;
48 
49export const CaptionEditorialEmphasis = ({
50  words = DEFAULT_WORDS,
51  emphasisWords = ["single", "code."],
52  color = "#f5f0d0",
53  fontSize = 56,
54  fontWeight = "400",
55  emphasisScale = 2,
56  background = "#0a0a0a",
57  speed = 1,
58  fps = 30,
59  durationInFrames = 180,
60  width = 1280,
61  height = 720,
62  className,
63}: CaptionEditorialEmphasisProps) => {
64  const safeSpeed = Math.max(0.01, speed);
65  const durationMs = (durationInFrames / fps) * 1000;
66 
67  const groups = [];
68  for (let i = 0; i < words.length; i += WORDS_PER_GROUP) {
69    const groupWords = words.slice(i, i + WORDS_PER_GROUP);
70    groups.push({
71      endMs: ((groupWords.at(-1)?.end ?? 0) * 1000) / safeSpeed + 180,
72      startMs: (groupWords[0].start * 1000) / safeSpeed,
73      words: groupWords,
74    });
75  }
76 
77  const containerStyle: CSSProperties = {
78    background,
79    height,
80    overflow: "hidden",
81    position: "relative",
82    width,
83  };
84 
85  return (
86    <Timegroup
87      className={className}
88      duration={`${durationMs}ms`}
89      mode="fixed"
90      style={containerStyle}
91    >
92      <>
93        <style>{`
94          @keyframes framecn-cee-grp-in {
95            from { opacity: 0; }
96            to   { opacity: 1; }
97          }
98// … truncated