OrkasVideoStudio

Drive video composition, generation, and editing — and a fully automatic end-to-end pipeline — from your coding agent. Claude Code, Codex, Cursor: any agent that can run a shell or speak MCP can use it.

https://github.com/user-attachments/assets/13411470-06da-4f64-9bc1-fa52fe27216b

OrkasVideoStudio is not a black-box video agent. A video is expressed as a readable, diffable, re-renderable plan (plan.json) that your agent — and you — can edit; change one line and only that piece re-renders. The agent is the brain; this project ships the knowledge (what makes a good video, and which production line to take), the deterministic capabilities (render / edit / transcribe / generate — thin wrappers over hyperframes, ffmpeg, and whisper.cpp), and that editable IR.

You talk to your agent in plain language — "make a 60-second vertical explainer on vector databases with a Chinese voiceover and captions" — and it reads the material, writes the timeline, and produces the file.

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The four production lines

Three orthogonal capability axes, plus an automatic pipeline that weaves them together:

• Compose — script → designed HTML motion graphics → mp4. Explainers, kinetic typography, lower-thirds, data viz, title cards, transitions. No paid keys.
• Edit — cut / join / trim-silence / de-filler / mix / burn-in subtitles / dub / localize real footage you supply, plus highlight selection over long recordings. No paid keys.
• Generate — talking-head or cinematic AI footage and imagery via your own provider keys (BYO — OpenAI, Gemini, Doubao; no managed backend, no lock-in).
• Auto (end-to-end) — when a deliverable needs more than one axis, the agent routes to a single cross-modal plan.json: stage-plan builds the EDL, stage-assemble walks it and delegates each segment back to compose / generate / edit, and a deterministic delivery guard (ovs plan promise-check) verifies the finished cut keeps its promise (e.g. real motion, not a silent slideshow) before anything ships.

The plan is the contract: "the footage in the middle, generate an opener, compose the stats, one voiceover over all of it" becomes one editable file where every segment, caption, and narration line is independently re-renderable.

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Relationship to Orkas

OrkasVideoStudio began life as the built-in video agent inside Orkas — the AI-team desktop app — where it was validated end-to-end, then extracted into this agent-agnostic, MIT-licensed toolkit.

• Inside Orkas it ships as a built-in agent — no separate install; the zero-key trunk works out of the box.
• Everywhere else you install it into your own coding agent (below) and get the same capabilities via the ovs CLI and MCP server.

Links: orkas.ai (website) · github.com/Orkas-AI (open-source projects) · this repo.

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Use cases

Each is a real prompt you'd give your agent; the router picks the line for you.

You say…	Line	What happens
"Make a 60s vertical explainer on what a vector DB is, Chinese voiceover + captions."	Compose	HTML motion-graphic scenes → narration (BYO TTS) → burned-in captions → mp4.
"Turn this 1-hour screen recording into three 30s highlight clips with captions."	Edit	scenes/quality find the good parts, rank-takes picks, trim-silence/remove-fillers tighten, subtitles burned in.
"Add an English voiceover + subtitles to product-demo.mp4 and normalize the loudness."	Edit	transcribe → localize → speak → mix → burnsubs → loudness pass.
"Clean the silences and 'um's out of my webcam take and tighten it."	Edit	deterministic jump-cut with an auditable evidence trail.
"Generate a 5s cinematic shot of a city at dawn for the intro."	Generate	BYO image/video provider → clip on your timeline.
"Make a 15s 9:16 promo from this script: generate the opener, compose the feature callouts, one VO."	Auto	one plan.json woven across generate + compose + narration, guarded before delivery.

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Install

Prerequisites: Node ≥ 22, and ffmpeg + ffprobe on your PATH (needed for edit / transcribe / local media QA). Compose drafts use a VideoStudio QA gate backed by the pinned HyperFrames 0.7.60 package dependency; npx is only a compatibility fallback. Generation is opt-in and needs your own keys.

Early development: the npm packages are being published. Until then, install from source — the ovs CLI works exactly the same.

From source (works today)

git clone https://github.com/Orkas-AI/Orkas-VideoStudio.git
cd Orkas-VideoStudio
pnpm install && pnpm build
node packages/cli/dist/index.js doctor     # verify ffmpeg/ffprobe/node
# optionally alias it:  alias ovs="node $PWD/packages/cli/dist/index.js"

From npm (once published)

npm i -g @orkas/video-studio     # provides the `ovs` command
ovs doctor                       # checks ffmpeg/ffprobe/node; guides any install

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Drive it from your coding agent

The ovs CLI is the canonical interface; the MCP tools mirror it 1:1. There are three ways an agent picks it up — use whichever your agent supports:

1) Native skills (Claude Code / Codex). Materialize the SKILL.md knowledge pack so the agent discovers it by progressive disclosure:

ovs skills --install --target claude   # → ~/.claude/skills   (add --scope repo for ./.claude/skills)
ovs skills --install --target codex    # → ~/.agents/skills

2) MCP typed tools. Register the server (mirrors the CLI):

claude mcp add ovs -- npx -y @orkas/video-studio-mcp     # Claude Code
codex  mcp add ovs -- npx -y @orkas/video-studio-mcp     # Codex
# from source (until published): point it at  node <repo>/packages/mcp/dist/index.js

3) Self-describing CLI (any agent that can run a shell). No native loader needed:

ovs skills               # list the skills
ovs skill video-router   # print a skill's full instructions into context
ovs --help               # the full command surface

How a session flows. The agent reads video-router first (it locks the line), then the relevant stage skills, authors the composition and/or plan.json, runs the deterministic ops, and self-verifies with the delivery guard:

You:   Make a 60s vertical explainer on vector databases, with a Chinese voiceover.
Agent: → reads video-router (locks: compose-primary)
       → reads stage-plan / stage-compose / video-craft
       → writes composition/composition-manifest.json + plan.json
       → ovs composition prepare composition
       → authors composition/index.html on the prepared HyperFrames scaffold
       → ovs draft composition --out draft.mp4 --report draft-report.json
       → ovs plan promise-check plan.json         # guard passes
       → returns draft.mp4

The full command surface: doctor · composition {prepare,reconcile} · draft · render · lint · check · snapshot · edit {probe,trim,concat, burnsubs,overlay,extract-frame,loudness,mix,trim-silence,remove-fillers} · transcribe · silence · scenes · quality · plan {validate,summarize,promise-check,rank-takes} · narration fit · gate transition · speak · speech-capabilities · image · video · skills.

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BYO generation providers

The compose / edit / transcribe trunk is zero-key. Generation (image / video / TTS) is opt-in and uses your keys — no managed backend, no account binding. Configure via ~/.config/orkas-video-studio/config.json (or OVS_CONFIG_DIR) or environment variables:

Capability	Providers	Env
Image (ovs image)	OpenAI-compatible · Gemini · Doubao Seedream	OVS_IMAGE_PROVIDER · OVS_IMAGE_BASE_URL · OVS_IMAGE_API_KEY · OVS_IMAGE_MODEL
Video (ovs video)	Doubao Seedance · Atlas Cloud · MuAPI	OVS_VIDEO_PROVIDER · OVS_VIDEO_BASE_URL · OVS_VIDEO_API_KEY · OVS_VIDEO_MODEL
TTS (ovs speak)	OpenAI-compatible (incl. ElevenLabs-style)	OVS_TTS_BASE_URL · OVS_TTS_API_KEY · OVS_TTS_MODEL · OVS_TTS_VOICE · OVS_TTS_FORMAT

Use ovs speech-capabilities to resolve the exact configured narration profile without printing credentials, then ovs narration fit before and after synthesis to keep each line inside its plan window. Video generation accepts explicit reference images, ratio, duration, resolution, and audio generation flags so the provider call matches the approved plan. ovs plan validate also checks each generate segment's ratio, duration, and operation against the configured video.provider, so Gate C never approves a plan the provider will reject.

For MuAPI, explicitly set video.provider to "muapi" and provide MUAPI_API_KEY (or use OVS_VIDEO_API_KEY). MUAPI_API_KEY takes precedence over the generic key when MuAPI is selected, and never selects MuAPI by itself. video.model / OVS_VIDEO_MODEL currently supports these validated Kling v2.1 endpoint slugs: kling-v2.1-master-t2v, kling-v2.1-master-i2v, kling-v2.1-standard-i2v, and kling-v2.1-pro-i2v; unsupported slugs are rejected rather than sent with a mismatched body. Text-to-video defaults to kling-v2.1-master-t2v, while a first-frame image_url defaults to kling-v2.1-master-i2v. The default base URL includes /api/v1; custom MuAPI base URLs must include that path. See the MuAPI API reference for the submit-and-poll contract and model-specific parameters. This adapter accepts the common prompt, aspect-ratio, duration, and first-frame inputs; for the supported Kling endpoints, duration is 5 or 10 seconds and ratio is 16:9, 9:16, or 1:1. Provider-neutral resolution, generate_audio, and quality inputs remain compatible with signed plans; resolution and audio are ignored by Kling, while quality is validated but not sent. Edit and additional-reference controls are rejected until a matching MuAPI schema is supported.

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How it compares

HyperFrames, ffmpeg, and whisper.cpp are dependencies here, not competitors — OrkasVideoStudio is the agent-facing knowledge, draft QA gate, and IR layer on top of them. Against other ways to make video:

	OrkasVideoStudio	Programmatic frameworks (Remotion, Revideo)	AI SaaS editors (Descript, Opus Clip, Runway)	Thin MCP / ffmpeg wrappers
Driver	any coding agent, in natural language (CLI + MCP)	you hand-write React/TS	GUI / hosted	an agent, but tools only
Artifact	editable, diffable plan.json IR — per-segment re-render	code (re-run to render)	black-box timeline / hosted project	none
Scope	compose + edit + generate + AUTO end-to-end	composition (programmatic)	mostly edit or generate, per product	whatever the tool exposes
Guidance	ships "what makes a good video" as skills + a deterministic delivery guard	none — you decide	product-opinionated	none
Keys / hosting	zero-key trunk; BYO keys for generation; local-first, self-host	your own infra	vendor keys + hosted, lock-in	varies
License	MIT	may require a company license for teams	proprietary	varies

Where it fits: reach for a framework when you want to hand-code every frame; a SaaS editor when a GUI and hosting are the point; OrkasVideoStudio when you want your agent to make the video, keep the result as an auditable file you can edit and re-render, and stay local + open with your own keys.

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Packages

Package	What
@orkas/video-studio-core	the plan.json IR (schema + validator + delivery guard), decision layer, runtime/config
@orkas/video-studio-tools	capability backends (render / edit / analyze / speech / image / video)
@orkas/video-studio	the ovs CLI
@orkas/video-studio-mcp	MCP server (mirrors the CLI 1:1)
@orkas/video-studio-skills	the host-neutral SKILL.md knowledge pack

The technical plan and roadmap live in PLAN.md.

Development

pnpm install
pnpm build        # tsc per package (core → tools → cli/mcp)
pnpm test         # vitest
pnpm test:video   # mock provider round-trip → real playable MP4 → ffprobe
pnpm test:video:e2e # build + real CLI production (motion/audio/captions) + CLI/MCP smoke
pnpm benchmark    # deterministic core correctness + latency/throughput benchmark
pnpm typecheck
pnpm verify       # all checks, including mandatory real video production

test:video is deterministic and never spends provider credits: a local fake Seedance endpoint returns a real H.264 fixture, then OVS downloads it and verifies the result with ffprobe. test:video:e2e creates a nine-second, three-scene 1080p production through the built CLI: composition prepare/reconcile, snapshot, the full draft gate, subtitle burning and final-file promise checks. It decodes the entire MP4 and checks scene order, visible motion, audible audio in every scene, burned subtitle pixels and rejection of a wrong delivery duration. It also exercises the built CLI/MCP surfaces. Both commands fail with an actionable error when required video runtimes are missing; the ordinary test suite may skip runtime-heavy cases on machines without ffmpeg or a browser.

Before any Git commit or PR, pnpm verify must pass on the final candidate; it includes the real production case and is also the CI entry point. Test-only changes follow the same rule. For sync/release review, retain and inspect the produced video, previews, final frames and reports:

OVS_VIDEO_EVIDENCE_DIR=../Orkas-VideoStudio-artifacts pnpm test:video:e2e

The directory is opt-in and each run uses a unique child directory. Ordinary CI runs clean up their temporary media. Fixtures use original HTML/SVG and locally generated instrumental audio; they do not call paid providers or claim TTS/model quality coverage.

pnpm benchmark is zero-key and deterministic. It builds the core package, verifies benchmark fixtures, then measures gate transitions, EDL validation/delivery summaries, composition-manifest validation, and narration estimation. Each suite carries a deliberately conservative throughput floor so large regressions fail while normal CI and developer-machine variance does not.

License

MIT — see LICENSE. Rendering uses the Apache-2.0 licensed HyperFrames 0.7.60 dependency; editing and media QA use system ffmpeg, while transcription is delegated to HyperFrames/whisper.cpp. See PLAN.md for how third-party runtimes are located and the licensing notes.

Versions and delivered-video checks

All OVS packages share an independent YYYY.M.D calendar version, using the Asia/Shanghai release-candidate date without zero padding. See CHANGELOG.md for prepared/released changes. This version is independent of the Orkas desktop application and marketplace Agent versions. Tags, when explicitly released, use v<version>; never overwrite a published date version.

For an assembled plan, verify the finished file as well as its component footage:

ovs plan promise-check project/plan.json --probe-produced --video project/render/video.mp4

The equivalent MCP plan_promise_check accepts probe_produced and video. Delivery verification measures duration, canvas, audio, integrated loudness and per-line voiced spans. Missing narration evidence fails the check. Caption warnings require visual confirmation when subtitles were burned in.

ovs speak writes a request/audio receipt beside its output and reuses only an exact matching request with intact bytes. Include the approved --language, voice, model, speed and format; changing those settings invalidates reuse.

Synchronization uses a dedicated branch and PR. The diff and verification are reviewed by the requester before creating the PR; merge and release are separate explicit actions.