hyperframes/registry/examples/play-mode/compositions/captions.html

<template id="captions-template">
  <div
    data-composition-id="captions"
    data-width="1920"
    data-height="1080"
    data-duration="__VIDEO_DURATION__"
  >
    <div id="captions-container"></div>

    <style>
      [data-composition-id="captions"] {
        width: 1920px;
        height: 1080px;
        pointer-events: none;
      }

      [data-composition-id="captions"] #captions-container {
        position: absolute;
        bottom: 100px; /* Position in bottom 1/3 */
        left: 50%;
        transform: translateX(-50%);
        display: flex;
        justify-content: center;
        align-items: center;
        width: 100%;
        height: 150px; /* Fixed height for the caption box */
      }

      .caption-box {
        position: absolute; /* Stacked in the same place */
        background-color: #ff2d8a;
        color: white;
        padding: 20px 40px;
        border-radius: 16px;
        font-family: "Nunito", sans-serif;
        font-weight: 900; /* Nunito Black */
        font-size: 64px;
        text-align: center;
        display: inline-block;
        white-space: nowrap;
        opacity: 0;
        visibility: hidden;
        transform: scale(0);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
      }
    </style>

    <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
    <script>
      (function () {
        const TRANSCRIPT = [
          { text: "We", start: 0.119, end: 0.259 },
          { text: "asked", start: 0.319, end: 0.479 },
          { text: "what", start: 0.519, end: 0.659 },
          { text: "you", start: 0.699, end: 0.819 },
          { text: "needed.", start: 0.859, end: 1.819 },
          { text: "Forty-seven", start: 1.839, end: 2.299 },
          { text: "percent", start: 2.399, end: 2.679 },
          { text: "of", start: 2.7, end: 2.799 },
          { text: "you", start: 2.839, end: 2.939 },
          { text: "said", start: 3.039, end: 3.179 },
          { text: "motion", start: 3.24, end: 3.559 },
          { text: "graphics.", start: 3.579, end: 4.639 },
          { text: "Sixty-two", start: 4.659, end: 5.179 },
          { text: "percent", start: 5.299, end: 5.759 },
          { text: "said", start: 5.859, end: 5.98 },
          { text: "static", start: 6.099, end: 6.399 },
          { text: "content", start: 6.46, end: 6.879 },
          { text: "was", start: 6.92, end: 7.079 },
          { text: "costing", start: 7.099, end: 7.48 },
          { text: "you", start: 7.5, end: 7.579 },
          { text: "attention,", start: 7.679, end: 8.659 },
          { text: "and", start: 8.699, end: 8.86 },
          { text: "three", start: 8.88, end: 9.06 },
          { text: "out", start: 9.079, end: 9.18 },
          { text: "of", start: 9.199, end: 9.34 },
          { text: "four", start: 9.38, end: 9.799 },
          { text: "said", start: 9.84, end: 10.0 },
          { text: "you", start: 10.019, end: 10.159 },
          { text: "know", start: 10.179, end: 10.36 },
          { text: "the", start: 10.38, end: 10.479 },
          { text: "look", start: 10.52, end: 10.699 },
          { text: "you", start: 10.739, end: 10.859 },
          { text: "want", start: 10.98, end: 11.34 },
          { text: "but", start: 11.359, end: 11.52 },
          { text: "don't", start: 11.56, end: 11.779 },
          { text: "have", start: 11.819, end: 11.94 },
          { text: "the", start: 11.96, end: 12.06 },
          { text: "editing", start: 12.079, end: 12.4 },
          { text: "skills", start: 12.52, end: 12.86 },
          { text: "to", start: 12.88, end: 13.0 },
          { text: "get", start: 13.019, end: 13.18 },
          { text: "there.", start: 13.22, end: 14.22 },
          { text: "So", start: 14.239, end: 14.399 },
          { text: "we", start: 14.42, end: 14.52 },
          { text: "built", start: 14.619, end: 14.88 },
          { text: "Hyperframes", start: 15.079, end: 15.42 },
        ];
        const container = document.getElementById("captions-container");
        const tl = gsap.timeline({ paused: true });

        // Group transcript into lines (max 5 words)
        const lines = [];
        for (let i = 0; i < TRANSCRIPT.length; i += 5) {
          lines.push(TRANSCRIPT.slice(i, i + 5));
        }

        lines.forEach((lineWords, index) => {
          const lineText = lineWords.map((w) => w.text).join(" ");
          const startTime = lineWords[0].start;
          const endTime = lineWords[lineWords.length - 1].end;

          // Create element
          const el = document.createElement("div");
          el.className = "caption-box";
          el.textContent = lineText;
          el.id = `caption-line-${index}`;
          container.appendChild(el);

          // Animation: Pop in with scale-up bounce (0% to 110% to 100%)
          tl.to(
            el,
            {
              autoAlpha: 1,
              scale: 1.1,
              duration: 0.2,
              ease: "power2.out",
            },
            startTime,
          );

          tl.to(
            el,
            {
              scale: 1,
              duration: 0.1,
              ease: "power2.inOut",
            },
            startTime + 0.2,
          );

          // Stay visible until next line or end of its duration
          // We hide it when the next line starts or at its own end time
          const hideTime =
            index < lines.length - 1 ? Math.min(endTime, lines[index + 1][0].start) : endTime;

          tl.to(
            el,
            {
              autoAlpha: 0,
              scale: 0,
              duration: 0.15,
              ease: "power2.in",
            },
            hideTime,
          );
        });

        window.__timelines = window.__timelines || {};
        window.__timelines["captions"] = tl;
      })();
    </script>
  </div>
</template>