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How to build a seamless 10-second muted loop for a landing page with Cinetic

Render a looping feature animation that autoplays without sound on your site.

  • Content
  • Intermediate
  • 1 hour 15 minutes
  • From the README
  • Claude Code
  • Codex
  • Cursor

Who it is forA web or marketing team that wants a short feature animation on a landing page without sound.

The problemFeature demos on landing pages often stutter at the loop point or need sound that the site cannot use.

The outcomeA 1920x1080 MP4 that loops seamlessly and has no sound, ready to autoplay on the page.

What you need first

  • Node 22+
  • ffmpeg 6+ with libx264 and ffprobe
  • Python 3.11+ with the listed Python packages
  • A headless Chromium
  • A coding agent such as Claude Code, Codex or Cursor

Steps

  1. Run npx skills add Leonxlnx/cinetic to install the skill.
  2. Describe the feature to show and the number of seconds, and state that the loop must be seamless and silent.
  3. Let the agent run python3 scripts/pick.py --format loop --seconds 10 --json out/qa/picks.json to draw the techniques. (inferred, check the README)
  4. Play the MP4 in a loop in your browser and check the join point.
  5. Embed the file on the page with muted autoplay.

Prompt for your agent

Using the cinetic skill in Leonxlnx/cinetic, make a 10-second 1920x1080 feature loop with no sound that shows <feature name> from <product name>. The loop must join seamlessly at the end frame. Verify the first and last frames match before you report the file path.

Caveat. The README gives the loop example as silent and 10 seconds, but the seamless join is only checked by you in a browser, so test it on the target page.

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