Reactivid

Generating Long-Form Videos with AI From script to screen — AI that writes, narrates, and edits for you.

Ready to create your first AI-generated video? Let’s make it happen.

See Reactivid in Action

Reactivid turns ideas into publish-ready videos — fast. Generate scripts, clone voiceovers, auto-build storyboards, and export to professional timelines with brand-ready styles.

Reactivid turns a script or voiceover into a timed storyboard and exports a ready-to-tweak After Effects comp.

All-in-One AI Video Pipeline

Go from script → voiceover → storyboard → export in one flow. Use brand presets for fonts, colors, and layouts, and leverage After Effects JSX automation for pro-grade timelines.

What is Reactivid?

Reactivid is an AI software platform owned by Ellwood Bristol Inc., an Ontario-based corporation. It streamlines the entire video creation workflow — from scriptwriting, to AI-generated voiceovers, to automated storyboarding, and finally to exporting production-ready packages for Adobe After Effects.

Operated in Ontario, Canada through Ellwood Bristol Inc., Reactivid is positioned to access Canadian innovation programs, startup accelerators, and non-dilutive funding opportunities. The platform is designed for creators, YouTubers, and media teams, while its underlying AI pipelines (script generation, voice synthesis, and asset normalization) also apply across education, marketing, and enterprise communications.

Currently at the MVP stage with closed beta workshops and onboarding in progress, the company’s vision is to scale into a creator-economy infrastructure platform — providing not just video generation tools, but also a broader suite of automation APIs for digital media.

This page is a lightweight preview for incubators, cloud credit providers, and interested investors. For questions or inquiries, email craig@ellwoodbristol.com.

How Reactivid Works

Step 1

Script Creation

Scripting

Start from a prompt, paste a draft, import a doc/URL, or outline your beats. Reactivid’s LLM tooling converts raw ideas into a structured, production-ready script with **sections, beats, and durations** that align to your target runtime.

Structured Prompts: Controls for intent, audience, tone, reading level, runtime, and platform (YouTube long-form, podcast with b-roll, instructional, etc.).
Beat Sheet & Scene Graph: The draft is normalized into a scene graph (id, purpose, copy, est. duration, media hints, on-screen text) for downstream tooling.
Constrained Rewrites: Lock key statements/terms while rewriting for clarity, length, or SEO. Multi-lingual authoring supported.
Knowledge Ingestion: Optional source files are chunked & embedded to keep the script grounded to your material.
Versioning & Review: Inline comments, side-by-side diffs, and branchable variants (e.g., “educator tone” vs “brand tone”).
Safety & Style Checks: Filler reduction, jargon flags, claim markers, and call-to-action placement rules.
Exports: Markdown, CSV (scene timeline), and JSON (full graph) for hand-off or API use.

Voiceover

Generate natural narration from the script with studio-quality processing. Choose a ready-made voice, bring your own, or clone within your usage rights. Reactivid returns **word-level timestamps** for perfect alignment.

Multi-Engine TTS: Connectors for premium voices (e.g., ElevenLabs) with SSML support: breaks, emphasis, whisper, phoneme overrides, and prosody controls (rate/pitch/volume).
Forced Alignment: Word/phoneme alignment creates precise captions, karaoke highlights, and scene timing.
Audio Cleanup: Loudness normalization (-16 LUFS), de-ess, noise gate, and breath reduction.
Multi-Speaker: Assign different voices to characters/sections; per-paragraph SSML rules.
Caching & Reuse: Narration is content-hashed so repeated lines don’t re-bill or re-render.
Languages: Global locale coverage with auto-detected script language and fallback rules.

Step 2

AI Voice Generation

Step 3

Storyboarding

The scene graph is expanded into a **visual plan**: shots, lower-thirds, b-roll, and motion cues. Brand kits are applied automatically so every frame feels intentional and consistent.

Shot Planner: Suggested shot types (WS/MS/CU), transitions, panning moves, and timing synced to narration beats.
Asset Pipeline: Pull from your library, stock providers, or generate placeholders; auto-tagged for licensing and aspect safety.
Brand Kit: Colors, fonts, intro/outro, watermark, lower-third styles, title cards, and bumpers.
Caption & Chapter Plan: Auto chapters + SRT/VTT prepared from alignment; optional on-screen callouts.
Aspect Sets: Plan once, export many (16:9, 9:16, 1:1) with smart reflow and safe-zone checks.
Templates & Presets: Save storyboards as reusable templates for series/campaigns.

Generation

Rendering stitches narration, visuals, and motion templates into a **final master**. Parallel workers accelerate long-form delivery while keeping outputs deterministic for repeatability.

Render Engine: GPU-assisted pipeline (timeline composition, transitions, captions burn-in or sidecar).
Multi-Output: Export 4K/1080p, 16:9/9:16/1:1, ProRes/H.264/H.265, plus SRT/VTT & chapter JSON.
After Effects Export: Download a ZIP with SRT + CSV storyboard + media + AE automation script for full manual polish.
Queue & Webhooks: Priority lanes, retries, and status webhooks for CI/CD-style pipelines.
Determinism & Seeds: Optional fixed seeds for image/motion generation so teams can reproduce exactly.
Publishing: Ready for platform upload; filenames, thumbnails, and metadata pre-filled from your brand kit.

One click for creators—API for engineers. Either way, the same pipeline, assets, and guarantees.

Step 4

Final Video Export