undefined

This skill runs entirely on the **hyperframes** CLI plus system `ffmpeg` / `ffprobe`.
Transcription is local **Whisper** via `hyperframes transcribe` — no third-party
service, API key, or rate-limited proxy.

npx hyperframes doctor          # ffmpeg, headless browser, render deps

Required:

- `ffmpeg` / `ffprobe` (system)
- `<SKILL_DIR>/assets/fonts/*.woff2`, `<SKILL_DIR>/assets/vendor/gsap.min.js` (bundled inside this skill, staged to work dir in Step 9)

Transcription needs no key — `hyperframes transcribe` runs Whisper locally (Step 4).

Strongly recommended on macOS for `hyperframes render`:

```bash
export PRODUCER_BROWSER_GPU_MODE=hardware

VIDEO_PATH="/absolute/path/input.mp4"
WORK_DIR="videos/$(basename "$VIDEO_PATH" | sed 's/\.[^.]*$//')"
mkdir -p "$WORK_DIR"

undefined

Outputs: `metadata.json` (read `width`/`height`/`duration`; fps = the `r_frame_rate`
fraction evaluated, e.g. `30000/1001 → 29.97`) + `audio.mp3`.

npx hyperframes transcribe "$WORK_DIR/audio.mp3" -d "$WORK_DIR" --json --model small.en

{
  "schemaVersion": 3,
  "composition": {
    "fps": 30,
    "width": 1080,
    "height": 1920,
    "durationSeconds": 121.2,
    "layout": "portrait",
    "themeId": "noir",
    "seed": 42
  },
  "videoTrack": {
    "sourcePath": "input-video.mp4",
    "startSec": 0,
    "endSec": 121.2,
    "bounds": { "x": 0, "y": 0, "width": 1080, "height": 1920 }
  },
  "subtitles": { "enabled": false },
  "cards": [
    {
      "id": "card-01",
      "intent": "Hook with the speaker's anxious midnight question",
      "startSec": 0.5,
      "endSec": 13.0,
      "accentIndex": 0,
      "zone": "fullscreen",
      "contentHints": {
        "kicker": "AN HONEST QUESTION",
        "title": "The soul-searching question at 11 PM",
        "detail": "Client's 60-second voice message: 'If the RMB appreciates, does that mean my USD policy is a terrible loss?'"
      }
    }
  ]
}

secPerCard = basePace × densityMultiplier
cardCount  = max(5, round(videoDurationSec / secPerCard))

// Precompute before the call:
//   recommendedRatio = "16:9" | "9:16" | "4:5"
//   autoCount        = integer (from Step 6)

AskUserQuestion({
  questions: [
    {
      question: "Output video aspect ratio (canvas):",
      header: "Aspect ratio",
      multiSelect: false,
      // Reorder so the recommended option appears FIRST (per AskUserQuestion convention).
      // Append " (recommended · matches source video W×H)" to the recommended option's label.
      options: [
        { label: "16:9 (1920×1080) landscape", description: "TV / YouTube / desktop playback. Most natural when the source video is already landscape; widest canvas." },
        { label: "9:16 (1080×1920) portrait", description: "TikTok / Reels / short-form mobile. Most natural for portrait source; native mobile experience." },
        { label: "4:5 (1080×1350) near-portrait", description: "Instagram feed / WeChat Moments. Best when source is near-square or you want to cover both platforms." }
      ]
    },
    {
      question: "Choose the overall layout: how should the video and cards coexist on the canvas?",
      header: "Layout",
      multiSelect: false,
      options: [
        { label: "side-by-side (split)",  description: "Video and card each take half the canvas. Most stable for interview / data side-by-side; clear visual separation." },
        { label: "top-bottom (stack)",    description: "Video on top (~52%), card below. Classic combo of speaker face + summary card; works well in portrait too." },
        { label: "picture-in-picture (pip)", description: "Card fills the canvas, video shrinks to a rounded corner window. Use when content is primary and speaker is secondary." },
        { label: "full-screen overlay (overlay)", description: "Video plays full-bleed, card floats as a glass layer on top. Strong cinematic / emotional feel." }
      ]
    },
    {
      question: "Choose the card visual style (style):",
      header: "Style group",
      multiSelect: false,
      // NOTE: these 3 groups intentionally match the frame auto-pick matrix
      // rows below, so picking a group resolves both `style` group AND the
      // frame matrix column in one step. Memberships are mutually exclusive.
      options: [
        { label: "warm paper (warm-paper)", description: "academic notebook · editorial big-type · whiteboard hand-drawn · xhs social. Best for interview reflections, product launches, lifestyle, emotional stories." },
        { label: "clinical / cold (clinical)",   description: "audit magazine · swiss grid · terminal CLI · minimal modern. Best for financial analysis, investigative reports, technical tutorials, serious presentations." },
        { label: "experimental / avant-garde (experimental)", description: "geom color-clash geometry · spotlight dark-background. Best for short-form highlights, product launches, strong emotion, cinematic feel." }
      ]
    },
    {
      question: "Card count (takeaway pacing): how many cards to cut?",
      header: "Card count",
      multiSelect: false,
      options: [
        { label: "Auto (recommended) · approx N cards", description: "Inferred automatically from video duration and information density (see Step 6 rules). This run estimates approx N cards. Substitute the real N (your autoCount) into the label." },
        { label: "Fewer · approx round(N × 0.6) cards", description: "Sparser cuts, each card holds longer — suits reflective / slow-paced content." },
        { label: "More · approx round(N × 1.5) cards", description: "Tighter cuts, faster rhythm — suits staccato / data-dense / short-form highlight content." }
      ]
    }
  ]
})

I need to confirm four visual decisions with you before I start cutting cards:

1) Output aspect ratio (canvas):
   A. 16:9 landscape (1920×1080) — TV / YouTube / desktop playback
   B. 9:16 portrait (1080×1920) — TikTok / Reels / short-form mobile
   C. 4:5 near-portrait (1080×1350) — Instagram feed / works for both platforms
   ▸ My recommendation:  <recommendedRatio>  (matches source video W×H = <sourceW>×<sourceH>)

2) Overall layout (how video & card coexist):
   A. split   side-by-side (50/50)
   B. stack   top-bottom (video top, card bottom)
   C. pip     picture-in-picture (card full canvas, video rounded corner window)
   D. overlay full-screen glass overlay (video full-bleed, card glass layer)

3) Card style group (maps to frame auto-pick matrix, pick 1 of 3):
   A. warm paper (warm-paper)      (academic / editorial / whiteboard / xhs)
   B. clinical / cold (clinical)   (audit / swiss / terminal / minimal)
   C. experimental (experimental)  (geom / spotlight)

4) Card count (takeaway pacing):
   A. Auto (recommended) — approx <autoCount> cards
   B. Fewer — approx round(<autoCount> × 0.6) cards
   C. More — approx round(<autoCount> × 1.5) cards
   D. Give me a specific number (e.g. "8", "20")

Reply format: "1A 2C 3B 4A" or natural language is fine.
If you want all recommended defaults, reply "default" / "auto" / "use all recommendations".

Style  ×  Layout  ×  VideoFrame
 (10)      (4)         (3)

/* Pattern A: transparent root, page body provides the cream backdrop */
html,
body {
  background: var(--bg);
}
.card[data-card-id="card-X"] .root {
  background: transparent;
}

/* Pattern B: explicit per-card background ONLY for fullscreen cards */
.card[data-card-id="card-hero"] .root {
  background: var(--bg);
}
.card[data-card-id="card-overlay"] .root {
  background: transparent;
}

<div class="card" data-card-id="{cardId}">
  <style>
    /* MUST: every rule starts with .card[data-card-id="{cardId}"] */
    .card[data-card-id="card-01"] .root {
      width: 100%; height: 100%;
      display: flex; ...;
      font-family: 'Caveat', 'LXGW WenKai TC', serif;
      color: var(--text);
      background: var(--bg);
    }
    .card[data-card-id="card-01"] .title { font-size: 84px; ... }
  </style>

  <div class="root">
    <h1
      id="card-01-title"
      data-anim="kinetic-chars"
      data-anim-at="0.3"
      data-anim-duration="0.5"
      data-anim-stagger="0.04"
      data-anim-pattern="pop"
    >
      <span class="char">S</span>
      <span class="char">u</span>
    </h1>
    <div
      id="card-01-line"
      data-anim="grow-x"
      data-anim-at="0.65"
      data-anim-duration="0.5"
      data-anim-target-w="420"
      style="width:0;height:8px;background:var(--accent-0);border-radius:4px;"
    ></div>
  </div>
</div>

.card[data-card-id="X"] .root {
  container-type: inline-size;
}
.card[data-card-id="X"] .title {
  font-size: clamp(64px, 8.5cqi, 132px);
}
.card[data-card-id="X"] .detail {
  font-size: clamp(24px, 3.2cqi, 40px);
}

undefined

undefined

<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <style>
      @font-face {
        font-family: "Caveat";
        src: url("fonts/Caveat-400-latin.woff2") format("woff2");
        font-weight: 400;
        font-display: block;
      }
      @font-face {
        font-family: "Caveat";
        src: url("fonts/Caveat-700-latin.woff2") format("woff2");
        font-weight: 700;
        font-display: block;
      }
      @font-face {
        font-family: "LXGW WenKai TC";
        src: url("fonts/LXGWWenKaiTC-400-latin.woff2") format("woff2");
        font-weight: 400;
        font-display: block;
      }
      @font-face {
        font-family: "Inter";
        src: url("fonts/Inter-400-latin.woff2") format("woff2");
        font-weight: 400;
        font-display: block;
      }
      @font-face {
        font-family: "Inter";
        src: url("fonts/Inter-700-latin.woff2") format("woff2");
        font-weight: 700;
        font-display: block;
      }
      @font-face {
        font-family: "Virgil";
        src: url("fonts/Virgil.woff2") format("woff2");
        font-display: block;
      }

      :root {
        /* Pick from the themeId palette table in Step 7 — example: classic */
        --bg: #fff9e3;
        --text: #1e1e1e;
        --accent-0: #1971c2;
        --accent-1: #e03131;
        --accent-2: #2f9e44;
        --accent-3: #e8590c;
        --accent-4: #9c36b5;
        --font-family: "Caveat", "LXGW WenKai TC", serif;
      }
      * {
        box-sizing: border-box;
      }
      /* Body font-family MUST list concrete font names (not just var(--font-family)) —
   the HyperFrames renderer's static analyzer doesn't expand CSS variables when
   resolving fonts, so a var-only chain triggers `font_family_without_font_face`
   lint and falls back to a generic. Use the concrete chain here; cards that
   want the theme font can still reference var(--font-family) internally. */
      html,
      body {
        margin: 0;
        padding: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
        background: #000;
        font-family: "Inter", "Caveat", "LXGW WenKai TC", ui-sans-serif, system-ui, sans-serif;
      }
      #stage {
        position: relative;
        width: 100%;
        height: 100%;
        overflow: hidden;
      }

      /* video-wrapper holds the source video. Its position / size are animated
   over time by the master timeline (one tween per layout transition). */
      .video-wrapper {
        position: absolute;
        left: 0;
        top: 0;
        width: 1920px;
        height: 1080px;
        overflow: hidden;
        border-radius: 0;
        box-shadow: none;
      }
      .video-wrapper video {
        width: 100%;
        height: 100%;
        object-fit: cover;
      }

      .card-host {
        position: absolute;
        pointer-events: none;
        overflow: hidden;
      }
      .card-host .card {
        position: relative;
        width: 100%;
        height: 100%;
        overflow: hidden;
      }
      .card-host .char {
        display: inline-block;
        visibility: visible;
      }

      /* Subtle drop shadow + rounded corners for non-fullscreen video framings */
      .video-wrapper.framed {
        border-radius: 16px;
        box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
      }
    </style>
  </head>
  <body>
    <div
      id="stage"
      data-composition-id="talking-head-recut"
      data-start="0"
      data-duration="121.2"
      data-fps="30"
      data-width="1920"
      data-height="1080"
    >
      <!-- Layer 1: source video — initial position matches card-01's layout -->
      <div class="video-wrapper" id="video-wrap">
        <video
          id="bg-video"
          src="input-video.mp4"
          muted
          playsinline
          data-start="0"
          data-duration="121.2"
          data-track-index="1"
        ></video>
      </div>

      <!-- Layer 2: each card-host sits at the bounds dictated by its layout. -->
      <!-- IMPORTANT: every card-host MUST carry BOTH "card-host" and "clip" classes. -->
      <!--   - "card-host"  → our positioning + pointer-events styles                 -->
      <!--   - "clip"       → HyperFrames runtime uses this to enforce visibility     -->
      <!--                    only during data-start … data-start+data-duration.      -->
      <!--                    Without "clip" the host stays visible the whole video   -->
      <!--                    (lint: timed_element_missing_clip_class).               -->
      <!-- Example: card-01 with zone="fullscreen" → card-host covers (0,0,1920,1080) -->
      <div
        class="card-host clip"
        data-card-id="card-01"
        data-start="1.0000"
        data-duration="6.5000"
        data-track-index="2"
        style="left:0;top:0;width:1920px;height:1080px;visibility:hidden;opacity:0;"
      >
        <!-- paste the contents of public/cards/card-01.html here -->
      </div>

      <!-- Example: card-02 with zone="side-panel" (split composition layout) → card on left half -->
      <div
        class="card-host clip"
        data-card-id="card-02"
        data-start="8.0000"
        data-duration="12.0000"
        data-track-index="2"
        style="left:0;top:0;width:960px;height:1080px;visibility:hidden;opacity:0;"
      >
        <!-- card-02 HTML -->
      </div>

      <!-- ...one "card-host clip" per card with inline bounds matching resolveZoneBounds(card.zone)... -->

      <script src="vendor/gsap.min.js"></script>
      <script>
        (function () {
          // count-up formatter helper
          window.__fmt = function (v, fmt) {
            if (typeof fmt === "string" && /^\.[0-9]+f$/.test(fmt)) {
              return Number(v).toFixed(Number(fmt.slice(1, -1)));
            }
            if (fmt === ",d") return Math.round(v).toLocaleString();
            return String(Math.round(v));
          };

          const tl = window.gsap.timeline({ paused: true });

          // ── Card lifecycle (one block per card) ──
          // Example for card-01 [1.0, 7.5] with kinetic-chars at +0.3, grow-x at +0.65:

          // Enter (fade in over 0.4s)
          tl.set('.card-host[data-card-id="card-01"]', { visibility: "visible" }, 1.0);
          tl.fromTo(
            '.card-host[data-card-id="card-01"]',
            { opacity: 0 },
            { opacity: 1, duration: 0.4, ease: "power2.out" },
            1.0,
          );

          // Card-internal anims (compile each data-anim-* declaration here)
          tl.from(
            '.card[data-card-id="card-01"] #card-01-title .char',
            { opacity: 0, y: 8, scale: 0.8, duration: 0.5, ease: "power2.out", stagger: 0.04 },
            1.3,
          );
          tl.fromTo(
            '.card[data-card-id="card-01"] #card-01-line',
            { width: 0 },
            { width: 420, duration: 0.5, ease: "power2.out" },
            1.65,
          );

          // Exit (fade out over 0.35s, ending at endSec)
          tl.to(
            '.card-host[data-card-id="card-01"]',
            { opacity: 0, duration: 0.35, ease: "power2.in" },
            7.15,
          );
          tl.set('.card-host[data-card-id="card-01"]', { visibility: "hidden" }, 7.5);

          // ── Video framing transitions ──
          // When the next card uses a different composition layout, animate the
          // video-wrapper to its new bounds. Example: card-01 = fullscreen
          // (video hidden behind), card-02 = split composition (zone="side-panel"
          // → video on right, card on left).

          // Card-02 enters at 8.0s with the split composition. Animate video to
          // the right half during the card-01 → card-02 gap (between 7.5 and 8.0s).
          tl.set("#video-wrap", { className: "video-wrapper framed" }, 7.5);
          tl.to(
            "#video-wrap",
            { left: 960, top: 0, width: 960, height: 1080, duration: 0.6, ease: "power2.inOut" },
            7.5,
          );

          // Card-02 enter — same pattern as card-01
          tl.set('.card-host[data-card-id="card-02"]', { visibility: "visible" }, 8.0);
          tl.fromTo(
            '.card-host[data-card-id="card-02"]',
            { opacity: 0 },
            { opacity: 1, duration: 0.4, ease: "power2.out" },
            8.0,
          );
          // ...card-02 internal anims...

          // ── repeat for each card; if the NEXT card's layout differs,
          //    insert another tl.to('#video-wrap', ...) tween before its enter ──

          window.__timelines = window.__timelines || {};
          window.__timelines["talking-head-recut"] = tl;
        })();
      </script>
    </div>
  </body>
</html>