> ## Documentation Index
> Fetch the complete documentation index at: https://hyperframes-fix-nested-composition-media-inpoint.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Vertical Media Filler

> Portrait media filling a widescreen frame via blurred-scale, mirror, or copy side fills; grid texture and foreground contrast lift (images inside the block; keep live footage in the host)

export const InstallCommand = ({command, item}) => {
  const [copied, setCopied] = React.useState(false);
  const [tuned, setTuned] = React.useState("");
  React.useEffect(() => {
    if (!item) return;
    const read = () => {
      try {
        const raw = new URLSearchParams(window.location.search).get(`vars-${item}`);
        if (!raw) return setTuned("");
        const parsed = JSON.parse(raw);
        if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return setTuned("");
        if (Object.keys(parsed).length === 0) return setTuned("");
        setTuned(` --vars '${JSON.stringify(parsed)}'`);
      } catch {
        setTuned("");
      }
    };
    read();
    window.addEventListener("hf-vars-changed", read);
    window.addEventListener("popstate", read);
    return () => {
      window.removeEventListener("hf-vars-changed", read);
      window.removeEventListener("popstate", read);
    };
  }, [item]);
  const fullCommand = `${command}${tuned}`;
  const copy = async () => {
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullCommand);
      } else {
        const previous = document.activeElement;
        const scratch = document.createElement("textarea");
        scratch.value = fullCommand;
        scratch.setAttribute("readonly", "");
        scratch.style.position = "fixed";
        scratch.style.opacity = "0";
        document.body.appendChild(scratch);
        scratch.select();
        document.execCommand("copy");
        document.body.removeChild(scratch);
        previous?.focus?.();
      }
      setCopied(true);
      setTimeout(() => setCopied(false), 2000);
    } catch {}
  };
  return <div className="hf-install-command not-prose my-4 flex items-stretch overflow-hidden rounded-xl border border-zinc-200 bg-zinc-50 dark:border-zinc-800 dark:bg-zinc-900">
      <code className="flex-1 overflow-x-auto whitespace-nowrap border-r border-zinc-200 px-4 py-3 font-mono text-sm text-zinc-800 dark:border-zinc-800 dark:text-zinc-100">
        {fullCommand}
      </code>
      <button type="button" onClick={copy} data-copied={copied ? "true" : "false"} aria-label={`Copy ${command} to the clipboard`} className="hf-install-copy">
        <svg className="hf-install-copy-clipboard" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="1.5" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M14.25 5.25H7.25C6.14543 5.25 5.25 6.14543 5.25 7.25V14.25C5.25 15.3546 6.14543 16.25 7.25 16.25H14.25C15.3546 16.25 16.25 15.3546 16.25 14.25V7.25C16.25 6.14543 15.3546 5.25 14.25 5.25Z" />
          <path d="M2.80103 11.998L1.77203 5.07397C1.61003 3.98097 2.36403 2.96397 3.45603 2.80197L10.38 1.77297C11.313 1.63397 12.19 2.16297 12.528 3.00097" />
        </svg>
        <svg className="hf-install-copy-check" xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 18 18" fill="none" stroke="currentColor" strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" aria-hidden="true">
          <path d="M2.75 9.5L6.5 13.25L15.25 4.5" />
        </svg>
      </button>
      <span className="hf-install-copy-status" role="status" aria-live="polite">
        {copied ? "Copied" : ""}
      </span>
    </div>;
};

<iframe className="w-full aspect-video rounded-xl border-0 bg-zinc-100 dark:bg-zinc-800" title="yt-vertical-fill preview" loading="lazy" srcDoc={`<!doctype html><html><head><meta charset="utf-8"><style>html,body{margin:0;height:100%;overflow:hidden;background:transparent}hyperframes-player{display:block;width:100%;height:100%}</style><script src="https://cdn.jsdelivr.net/npm/@hyperframes/player@0.7/dist/hyperframes-player.global.js"><\/script></head><body><script>fetch("/public/catalog/blocks/yt-vertical-fill.json").then(function(r){return r.json()}).then(function(d){var p=document.createElement("hyperframes-player");p.setAttribute("srcdoc",d.html);p.setAttribute("controls","");p.setAttribute("autoplay","");p.setAttribute("loop","");p.setAttribute("muted","");p.setAttribute("poster","https://static.heygen.ai/hyperframes-oss/docs/images/catalog/blocks/yt-vertical-fill.png");document.body.appendChild(p)});<\/script></body></html>`} />

## Install

<InstallCommand command="npx hyperframes add yt-vertical-fill" item="yt-vertical-fill" />

That writes one file: `compositions/yt-vertical-fill.html`.

## Add it to your video

It runs for 8 seconds at 1920×1080. Paste this into your composition:

```html index.html theme={null}
<div
  data-composition-id="yt-vertical-fill"
  data-composition-src="compositions/yt-vertical-fill.html"
  data-start="0"
  data-duration="8"
  data-track-index="1"
  data-width="1920"
  data-height="1080"
></div>
```

Move it in time with `data-start`. Put it on a different timeline row with
`data-track-index`. See [data attributes](/concepts/data-attributes) for the rest.

## Source

<Accordion title={`yt-vertical-fill.html`}>
  ```html theme={null}
  <!doctype html>
  <html lang="en">
    <head>
      <meta charset="utf-8" />
      <script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
      <style>
        *,
        *::before,
        *::after {
          margin: 0;
          padding: 0;
          box-sizing: border-box;
        }
        body {
          background: transparent;
          overflow: hidden;
        }
        #yt-vf-root {
          /* ---- yt tokens ---- */
          --yt-font: "Inter", -apple-system, sans-serif;
          --yt-grid-size: 28px;
          --yt-grid-alpha: 0.05;
          --yt-stage: #101012;
          --yt-scrim: rgba(8, 8, 10, 0.28);
          --yt-cyan: #35c8d9;
          --yt-prism-b: #2a7fff;
          --yt-violet: #7d5cff;

          position: relative;
          width: 1920px;
          height: 1080px;
          overflow: hidden;
          background: var(--yt-stage);
          font-family: var(--yt-font);
        }
        .yt-vf-media {
          position: absolute;
          overflow: hidden;
        }
        .yt-vf-media img,
        .yt-vf-media .yt-vf-fill {
          width: 100%;
          height: 100%;
          object-fit: cover;
        }
        #yt-vf-bg {
          inset: -60px;
          filter: blur(42px) brightness(0.75);
        }
        .yt-vf-side {
          top: 0;
          bottom: 0;
          width: 656px;
        }
        #yt-vf-scrim {
          position: absolute;
          inset: 0;
          background: var(--yt-scrim);
        }
        #yt-vf-grid {
          position: absolute;
          inset: 0;
          background:
            repeating-linear-gradient(
              0deg,
              rgba(255, 255, 255, var(--yt-grid-alpha)) 0 1px,
              transparent 1px var(--yt-grid-size)
            ),
            repeating-linear-gradient(
              90deg,
              rgba(255, 255, 255, var(--yt-grid-alpha)) 0 1px,
              transparent 1px var(--yt-grid-size)
            );
        }
        #yt-vf-fg {
          top: 0;
          bottom: 0;
          left: 656px;
          width: 608px;
          box-shadow: 0 0 90px rgba(0, 0, 0, 0.55);
        }
        /* stand-in portrait when no media is configured (self-demo) */
        .yt-vf-fill {
          display: flex;
          align-items: center;
          justify-content: center;
          font-weight: 700;
          font-size: 120px;
          color: rgba(255, 255, 255, 0.9);
          background: linear-gradient(
            160deg,
            var(--yt-cyan) 0%,
            var(--yt-prism-b) 50%,
            var(--yt-violet) 100%
          );
        }
      </style>
    </head>
    <body>
      <div
        id="yt-vf-root"
        data-composition-id="yt-vertical-fill"
        data-start="0"
        data-duration="8"
        data-width="1920"
        data-height="1080"
      >
        <div class="yt-vf-media" id="yt-vf-bg" data-layout-allow-overflow></div>
        <div class="yt-vf-media yt-vf-side" id="yt-vf-side-l" style="left: 0"></div>
        <div class="yt-vf-media yt-vf-side" id="yt-vf-side-r" style="right: 0"></div>
        <div id="yt-vf-scrim"></div>
        <div id="yt-vf-grid"></div>
        <div class="yt-vf-media" id="yt-vf-fg"></div>
        <div
          id="yt-vf-drv"
          class="clip"
          data-start="0"
          data-duration="8"
          data-track-index="0"
          style="position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none"
        ></div>
      </div>
      <script>
        (function () {
          window.__timelines = window.__timelines || {};

          /* ---- published parameters ----
             Vertical media filling a 16:9 frame — three fill modes:
             mode "scale" (big blurred copy behind), "mirror" (flanking
             mirrored copies), "copy" (flanking straight copies).
             IMAGES ONLY inside this block: the runtime never seeks media
             elements inside a sub-composition (renders black). For live
             vertical FOOTAGE, keep the media element in the HOST root
             positioned over the fg slot (left:656px width:608px) and feed
             this block a representative still for the fill layers. */
          var CONFIG = {
            src: null, // portrait IMAGE path; null -> stand-in gradient (demo)
            mode: "scale", // "scale" | "mirror" | "copy"
            fgContrast: 1.06,
            fgBrightness: 1.03,
            fgSaturation: 1.08,
            grid: { enabled: true },
            kenBurns: true,
            animationIn: true,
            animationOut: true,
          };

          var DUR = 8;
          function clamp(v, lo, hi) {
            return Math.min(hi, Math.max(lo, v));
          }
          var IN = clamp(DUR * 0.08, 0.3, 0.8);
          var OUT = clamp(DUR * 0.06, 0.25, 0.6);

          var root = document.getElementById("yt-vf-root");
          var bg = document.getElementById("yt-vf-bg");
          var sideL = document.getElementById("yt-vf-side-l");
          var sideR = document.getElementById("yt-vf-side-r");
          var fg = document.getElementById("yt-vf-fg");
          var grid = document.getElementById("yt-vf-grid");

          if (!CONFIG.grid.enabled) grid.style.display = "none";

          function media(id) {
            if (!CONFIG.src) {
              var d = document.createElement("div");
              d.className = "yt-vf-fill";
              d.textContent = "9:16";
              return d;
            }
            var img = document.createElement("img");
            img.src = CONFIG.src;
            img.id = id;
            return img;
          }

          fg.appendChild(media("yt-vf-m-fg"));
          fg.style.filter =
            "contrast(" +
            CONFIG.fgContrast +
            ") brightness(" +
            CONFIG.fgBrightness +
            ") saturate(" +
            CONFIG.fgSaturation +
            ")";

          if (CONFIG.mode === "scale") {
            bg.appendChild(media("yt-vf-m-bg"));
            sideL.style.display = "none";
            sideR.style.display = "none";
          } else {
            bg.style.display = "none";
            sideL.appendChild(media("yt-vf-m-l"));
            sideR.appendChild(media("yt-vf-m-r"));
            if (CONFIG.mode === "mirror") {
              sideL.firstChild.style.transform = "scaleX(-1)";
              sideR.firstChild.style.transform = "scaleX(-1)";
            }
            sideL.style.filter = "blur(6px) brightness(0.72)";
            sideR.style.filter = "blur(6px) brightness(0.72)";
          }

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

          if (CONFIG.animationIn) {
            tl.from(root, { opacity: 0, duration: IN, ease: "power2.out" }, 0);
            gsap.set(fg, { y: 34, opacity: 0 });
            tl.to(fg, { y: 0, opacity: 1, duration: IN * 1.6, ease: "power3.out" }, IN * 0.5);
          }
          if (CONFIG.kenBurns) {
            tl.fromTo(
              fg.firstChild,
              { scale: 1.05 },
              { scale: 1, duration: DUR - 1, ease: "sine.out" },
              0.4,
            );
          }

          if (CONFIG.animationOut) {
            tl.to(root, { opacity: 0, duration: OUT, ease: "power2.in" }, DUR - OUT - 0.05);
          }
          tl.set(root, { visibility: "hidden" }, DUR - 0.02);

          window.__timelines["yt-vertical-fill"] = tl;
        })();
      </script>
    </body>
  </html>
  ```
</Accordion>

Tagged `placeholder` `vertical` `media`.

## Related topics

* [Browse the complete Catalog](/catalog)
* [Add assets and Catalog items in Studio](/studio/assets-and-blocks)
* [Build a richer composition](/go-further)
