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How to add captions to a talking-head video without touching footage with Hyperframes

Overlay captions on an existing talking-head video using the embedded-captions skill.

  • Content
  • Intermediate
  • 30 minutes
  • From the README
  • Claude Code
  • Codex
  • Cursor
  • Gemini CLI

Who it is forA creator or educator with a recorded talking-head video who needs subtitles added for accessibility or social posts.

The problemAdding captions by hand in an editor is slow, and re-exporting can disturb the original footage.

The outcomeA captioned MP4 with the original footage left untouched, in one of the caption styles the skill offers: verbatim rail, embedded climax, or pure-cinematic embed.

What you need first

  • An AI coding agent that supports skills, such as Claude Code, Codex, Cursor, or Gemini CLI
  • Network access to install the plugin or skills from the heygen-com/hyperframes repository
  • For the PR use case: the gh CLI, which the README says the pr-to-video skill uses to read pull requests

Steps

  1. Install the skills with npx skills add heygen-com/hyperframes or the Claude Code plugin commands in the README.
  2. Place the source talking-head video in your working folder and note its path.
  3. Ask the agent to run the embedded-captions skill on that video and pick a caption style.
  4. Preview the result and confirm the captions match the spoken words and timing. (inferred, check the README)
  5. Render the final MP4 with the HyperFrames CLI render step. (inferred, check the README)

Prompt for your agent

Using the hyperframes repo at heygen-com/hyperframes, apply the embedded-captions skill to <video path> with the verbatim rail style and output a captioned MP4. Verify that the original footage is unchanged apart from the caption overlay.

Caveat. The README describes captions for an existing talking-head video, so it does not cover building a video from scratch with this skill.

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