hyperframes-media
Audio and media assets for HyperFrames compositions, produced by one shared audio engine (scripts/audio.mjs) — multi-provider TTS (HeyGen / ElevenLabs / Kokoro local), background music + sound effects (HeyGen audio-library retrieval by default, with local Lyria / MusicGen BGM generation and a bundled SFX library as the no-credential fallback), Whisper transcription, background removal, and caption authoring. Use for voiceover / TTS, BGM, SFX / sound effects, transcription, captions / subtitles / lyrics / karaoke / per-word styling, voice + provider selection, and music-mood prompting.
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/heygen-com/hyperframes --skill hyperframes-media- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads hyperframes-media automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
Security audits
Independent scans of the skill's instructions and bundled files.
SKILL.md
The instructions your agent reads when the skill is triggered.
HyperFrames Media
Create the audio and media assets a composition needs — voiceover (TTS), background music + sound effects, transcription, captions, background removal — then consume and animate that data in HTML. For placing assets into compositions, see hyperframes-core.
The audio engine — one source for TTS · BGM · SFX
Workflows do NOT hand-roll audio or vendor a copy. There is one engine — scripts/audio.mjs — that takes a neutral audio_request.json and writes audio_meta.json (plus assets under assets/voice|bgm|sfx):
# <MEDIA_DIR> = this skill's directory
node <MEDIA_DIR>/scripts/audio.mjs --request ./audio_request.json --hyperframes . --out ./audio_meta.json
All three capabilities degrade on ONE switch — whether a HeyGen credential is present (resolved from $HEYGEN_API_KEY / $HYPERFRAMES_API_KEY / ~/.heygen, not the CLI):
| Capability | HeyGen credential present | absent |
|---|---|---|
| TTS | HeyGen Starfish REST (native word timestamps) | → ElevenLabs → Kokoro (chain transcribe for words) |
| BGM | HeyGen music retrieval | Lyria → MusicGen local generation (detached) |
| SFX | HeyGen sound-effects retrieval (min_score 0.4) | bundled 21-file library (assets/sfx/) |
- Request (
audio_request.json):{ provider?, lang?, speed?, lines: [{ id, text, sfx?: [names] }], bgm: { mode?, query?, prompt? } }.idjoins each line back to the caller's model (a frame number, a scene id, …).bgm.mode=retrieve | generate | none; omit for auto (retrieve when credentialed, else generate). An explicitretrieveis strict — it skips rather than starting a detached generate (for callers with nowait-bgmstep). - Output (
audio_meta.json, id-keyed):{ tts_provider, voice_id, bgm, bgm_pending, …, voices: [{ id, path, duration_s, words }], sfx: [{ id, name, file, source, offset_s, duration_s, volume }], total_duration_s }. --only tts,bgm,sfxruns a subset and merges into an existing--out(e.g. TTS+BGM early, SFX once cues exist).- BGM generate is spawned detached (
bgm_pending: true) — runscripts/wait-bgm.mjsbefore assembling. scripts/heygen-tts.mjsis a single-shot CLI over the same code (one text → wav + words) for when you just need HeyGen TTS without a request file.
Full flag list + the audio_meta.json schema live in the header of scripts/audio.mjs. The references below cover the provider details and edge cases behind each capability.
Preflight — show sign-in status before any audio
Always run this before generating voice or BGM — inside a full workflow or a one-off "generate me a BGM/voiceover" request. No HeyGen credential is not a reason to silently fall back to local engines: first recommend signing in and let the user decide. Run the shared preflight and relay its output verbatim — don't improvise your own "missing key" prompt, and don't offer to write keys into a per-repo .env:
npx hyperframes auth status
- Signed in → it prints the account; proceed.
- Not signed in (
exit 1is expected here — "not signed in" is a normal state, not a failure) → it prints registration-first guidance. Recommend signing in:npx hyperframes auth loginis browser OAuth — it signs in and creates an account (always available through this repo's CLI). To use an existing HeyGen API key (from app.heygen.com/settings/api), runnpx hyperframes auth login --api-key— it saves to the shared~/.heygen(no per-repo.env). The output also lists the local engines voice/BGM will fall back to and apiphint when deps are missing. Relay this output as-is — don't paraphrase it into your own wording. Then STOP and wait for the user to choose — sign in, or say "go" / "local" to continue offline — before generating anything. This is a real decision point, not a passing note: don't fold it into another question, and don't proceed past it on your own. (Exception: in autonomous / non-interactive mode, note the status and continue offline.) npx hyperframes auth status --jsonreturns{ configured, recommended_action, offline_engines }for deterministic branching.- If the CLI can't run (not on PATH and
npxcan't fetch it) → still recommend signing in (npx hyperframes auth login) and STOP for the user's choice — don't treat "no credential" as a silent green light for local generation.
Credential resolution, full key priority, and the local-dependency list are in references/requirements.md.
Provider chains (the detail behind the engine)
TTS — first available provider wins (the engine, or npx hyperframes tts "..."):
| Order | Provider | Detected when | Word timestamps |
|---|---|---|---|
| 1 | HeyGen (Starfish) | $HEYGEN_API_KEY / hyperframes auth login | Yes, native — pass --words narration.words.json to capture |
| 2 | ElevenLabs | $ELEVENLABS_API_KEY set | No — chain transcribe after |
| 3 | Kokoro-82M (local, 54 voices) | always (no key required) | No — chain transcribe after |
The published
hyperframes ttsCLI is often the local-only build (its--helpsays "Kokoro-82M", no--provider/--words) and silently falls back to Kokoro even with$HEYGEN_API_KEYset. That is why the engine's HeyGen path is the self-containedscripts/heygen-tts.mjs(REST), NOT the CLI; the CLI is used only for the Kokoro path. Seereferences/tts.md.
BGM & SFX — by default retrieved from the HeyGen audio library (/v3/audio/sounds), same credential as HeyGen TTS, with the no-credential fallback from the switch above:
| Asset | HeyGen type | Lands in | Fallback (no credential) |
|---|---|---|---|
| BGM | music | assets/bgm/track.mp3 (retrieve) · track.wav (generate) | Lyria / MusicGen generation |
| SFX | sound_effects (min_score 0.4) | assets/sfx/<slug>.mp3 | bundled 21-file library (assets/sfx/* + manifest.json) |
See references/bgm.md and references/sfx.md.
Routing
| Task | Read |
|---|---|
The audio engine — request/meta schema, --only, the switch | scripts/audio.mjs (header comment) |
npx hyperframes tts / heygen-tts.mjs — providers, voices, words | references/tts.md |
| BGM — HeyGen retrieval + local Lyria / MusicGen generation | references/bgm.md |
| SFX — HeyGen retrieval (min_score 0.4) + bundled local library | references/sfx.md |
npx hyperframes transcribe — Whisper, model rules, output shape | references/transcribe.md |
npx hyperframes remove-background — transparent cutouts | references/remove-background.md |
| TTS → transcription → captions (no recorded voiceover) | references/tts-to-captions.md |
| Caption authoring — style detection, layout, word grouping, exit | references/captions/authoring.md |
| Transcript handling — input formats, quality gates, cleanup, APIs | references/captions/transcript-handling.md |
| Caption motion — karaoke, marker effects, audio-reactive | references/captions/motion.md |
| Model caches, system dependencies, troubleshooting | references/requirements.md |
Non-negotiable rules
- One engine, no vendored copies. Produce audio via
scripts/audio.mjs(orheygen-tts.mjsfor one-shot HeyGen TTS). Don't re-implement TTS/BGM/SFX inside a workflow — write anaudio_request.jsonadapter and call the engine. - "HeyGen available" = a resolvable credential, not the CLI. The whole switch keys off
heygenCredential(); the publishedhyperframes ttsmay be Kokoro-only, and there is nohyperframes bgm/hyperframes sfxcommand at all. - Voice IDs are provider-specific.
am_michaelis Kokoro-only; HeyGen UUIDs don't work on Kokoro. If you pass--voice, also pin--providerto avoid silent provider drift when the user's env changes. - Always pass
--modeltotranscribe. The CLI defaultsmall.ensilently translates non-English audio. Seereferences/transcribe.md→ "Language Rule". - HeyGen returns word timestamps; ElevenLabs / Kokoro do not. The engine chains
transcribeautomatically for the latter two; standalone, pass--wordsto HeyGen or runtranscribeagainst the audio file. - Captions consume the flat word-array format with
{ id, text, start, end }. Seereferences/transcribe.md→ "Output Shape". remove-background --background-outputis hole-cut, not inpainted. For "scene without the person", a different tool is needed. Seereferences/remove-background.md→ "When NOT the right tool".- BGM/SFX default to HeyGen retrieval; the no-credential fallback is generation (BGM) or the bundled library (SFX).
/audio/soundsranks by a text query — name effects concretely (glass shatter, notdramatic sound); a no-match skips, never blocks the render. SFX sit at volume ~0.35 under voice + BGM. Seereferences/sfx.md/references/bgm.md. - Treat workflow caption HTML as generated output. For preset-backed videos, the reusable skin source lives at
.hyperframes/caption-skin.htmland the workflow script writescompositions/captions.html; do not edit generatedcompositions/captions.htmlto fix the skin. Rebuild via the workflow'scaptions.mjs, or use that workflow's explicit overrides mechanism when present.
FAQ
What does the hyperframes-media skill do?
Audio and media assets for HyperFrames compositions, produced by one shared audio engine (scripts/audio.mjs) — multi-provider TTS (HeyGen / ElevenLabs / Kokoro local), background music + sound effects (HeyGen audio-library retrieval by default, with local Lyria / MusicGen BGM generation and a bundled SFX library as the no-credential fallback), Whisper transcription, background removal, and caption authoring. Use for voiceover / TTS, BGM, SFX / sound effects, transcription, captions / subtitles / lyrics / karaoke / per-word styling, voice + provider selection, and music-mood prompting.
How do I install hyperframes-media?
Run npx skills add https://github.com/heygen-com/hyperframes --skill hyperframes-media in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/hyperframes-media/ (personal) or .claude/skills/hyperframes-media/ (project).
Which AI agents can use hyperframes-media?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is hyperframes-media safe to install?
Security partners have reviewed it: Gen Agent Trust Hub flagged items to review; Socket passed; Snyk passed. As with any skill, read the SKILL.md and bundled scripts before installing.
Who maintains hyperframes-media?
It is published by heygen-com in heygen-com/hyperframes. It has 141,731 recorded installs.
More from heygen-com/hyperframes
hyperframes-cli
heygen-com/hyperframes
The HyperFrames CLI by job - scaffold, check, look at frames, edit the timeline, preview, render locally or in the cloud, publish, project history - plus reading its JSON and recovering from build or render failures.
hyperframes
heygen-com/hyperframes
Read first to make, edit, animate or render any video with HyperFrames (HTML rendered to video), including launch films, explainers, music videos, charts, maps, vertical clips, title cards, captions and overlays. Holds the render contract, the work loop and what each kind of video needs.
media-use
heygen-com/hyperframes
Get or make any media for a HyperFrames video - music, sound effects, images, icons, logos, voiceover, avatar and generated video, transcripts, cutouts, colour grades and looks - with HeyGen or free local tools, and mix placed audio. Also for footage that looks dark, flat or dull, or should be stylized or hidden.
hyperframes-registry
heygen-com/hyperframes
About 450 ready-made HyperFrames blocks and components installed as editable source - transitions, overlays, titles, kinetic type, captions, charts, map overlays, 3D, camera moves. Use it before hand-building any named visual (CRT scanlines, glitch, film grain, a chart); also for hyperframes add and catalog.
hyperframes-animation
heygen-com/hyperframes
All animation knowledge for HyperFrames — atomic motion rules, multi-phase scene blueprints, scene transitions, broader motion-design techniques, AND the seven runtime adapters (GSAP default, plus Lottie, Three.js, Anime.js, CSS keyframes, Web Animations API, TypeGPU). Use for any motion or animation task: pick 2-4 rules and compose, or load a blueprint, or look up runtime-specific API (e.g. GSAP eases / Lottie player / Three.js mixer). Also covers auditing an existing composition's choreography (animation map) and 24 named text-animation effects. HyperFrames-native: single paused timeline, seek-safe, deterministic.
hyperframes-core
heygen-com/hyperframes
The HyperFrames composition contract — build one renderable project. Use for composition structure, the data- timing attributes, class="clip", tracks, sub-compositions, variables, framework-owned media playback, deterministic-render rules, and validation. Read before writing composition HTML.
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