Overview

MasterSelects is a browser-based WebGPU compositor and media editor with timeline editing, nested compositions, AI-assisted workflows, project-local media management, and an optional native helper for the browser gaps that still matter.

What it can do, with a link to the page for each part. The sidebar of the documentation site lists every page by topic.

Capability	Description
Notebook	Write project notes, mark scenes and link passages, with document import, original views and screenplay layout
Time Stack	Blend delayed video instances in a compact editable node group with deterministic source sampling
AI Depth Map	Local depth estimation, live source preview and reusable depth-video baking
WebGPU Rendering	Shared render path for main preview, independent targets, output windows, and export
Timeline Editing	Multi-track editing, nested compositions, markers, transitions, shortcuts, and keyframes
Editable Motion Graphics	FlashBoard can compile animated lower thirds into native text, Motion shapes, and keyframes with temporal review and one-step undo
Node Workspace	One clip canvas with collapsible Color, Flock, Face Cables and 3D groups
AI Control	Private hosted-agent kernel with a public atomic-tool execution boundary, plus authenticated bridge and MCP access for external agents
AI Generation Workspaces	The compact Media generator remains available, while AI Studio adds parallel tabs, Media-drop references, local prompt dictation, fitted result tiles, Source Monitor opening, and timeline drag-out
3D Layers	Shared-scene 3D layers, camera clips, Gaussian splats, splat effectors, and local browser training
Flock Clips	Node-graph-defined GPU swarms with instanced animals, neighbor links, curved trails and technical glyphs in the shared 3D scene
Weave	Woven fabric, yarns, ropes and knots from general curve nodes, drawn as lit fibers in the shared 3D scene
Vector Animation	Lottie and Rive clips with canvas playback, bounce modes, render resolution overrides, keyframed state/data inputs, and export
Audio	Timeline-native workstation audio with artifact-backed analysis, spectral editing, local music-to-MIDI, mixer, recording, and export parity
Screen Capture	Browser-picker screen/window/tab recording with audio mixing, durable recovery, and optional timeline placement; the WebCodecs crop/scale tier is currently disabled
Image Mode	Still-image workspace with a layers panel, canvas edit mode, new-image presets, frame-to-image, and PNG save on the shared composition model
Live Inputs	Parallel screen, camera/capture-device, and composition-feedback sources as timeline clips
Storyboard And MIDI	Timeline storyboard scene cards and MIDI tracks/clips with tempo-aware editing and export support
Multicam And Batch Export	Audio-synced multicam assembly and queued source-media batch export
Project Storage	Continuous repository saves, durable branching history, immutable artifacts, relink and independent backups
Native Helper	Firefox storage backend, yt-dlp download flow, and local media-analysis jobs
Security And Debugging	Token-gated bridges, allowed-root file policy, playback monitors, logger tooling