🚧 Work In Progress

Note: Omnitool is under development. Expect breaking changes, evolving APIs, and experimental features.

✅ What this library is

• API for building and rendering timelines in the browser
• Uses WebCodecs, Web Workers, and the File System Access API for export
• usage is currently JavaScript/TypeScript only, cli soon

🚀 Install

npm i @omnimedia/omnitool

📦 Quick Start

Declaring the timeline

import {Driver, Omni, Datafile} from "@omnimedia/omnitool"

const driver = await Driver.setup()
const omni = new Omni(driver)

const {clip} = await omni.load({
	clip: Datafile.make(file) // file is a File or Blob
})

const timeline = omni.timeline(o => {
	const caption = o.text("Hello world", {
		duration: 1500,
		styles: {fill: "white", fontSize: 48}
	})
	const xfade = o.transition.crossfade(500)

	return o.sequence(
		o.stack(
			o.video(clip, {start: 0, duration: 3000}),
			caption
		),
		o.gap(400),
		xfade,
		o.video(clip, {start: 5000, duration: 2500}),
		o.audio(clip, {start: 5000, duration: 2500})
	)
})

Declarative helper style (no explicit o in timeline declarations):

import {
	Driver, Omni, Datafile,
	timeline, stack, video, audio, text, gap, transition
} from "@omnimedia/omnitool"

const driver = await Driver.setup()
const omni = new Omni(driver)
const {clip} = await omni.load({clip: Datafile.make(file)})

const timeline = timeline(
	stack(
		video(clip, {start: 0, duration: 3000}),
		text("Hello world", {duration: 1500}),
	),
	gap(400),
	transition.crossfade(500),
	video(clip, {start: 5000, duration: 2500}),
	audio(clip, {start: 5000, duration: 2500})
)

🧭 Spatial Transforms

const timeline = omni.timeline(o => {
	const move = o.spatial(o.transform({
		position: [120, 40],
		scale: [0.6, 0.6],
		rotation: 0.2
	}))

	const title = o.text("Lower third", {
		duration: 2000,
		styles: {fill: "white", fontSize: 36}
	})
	o.set(title.id, {spatialId: move.id})

	return o.stack(
		o.video(clip, {duration: 4000}),
		title
	)
})

Worker URL notes:

• Driver.setup() defaults to /node_modules/@omnimedia/omnitool/x/driver/driver.worker.bundle.min.js.
• If you serve the worker from a different location, pass workerUrl:

const workerUrl = new URL(
	"/path/to/driver.worker.bundle.min.js",
	window.location.href
)
const driver = await Driver.setup({workerUrl})

▶️ Playback

const player = await omni.playback(timeline)

document.body.appendChild(player.canvas)
player.play()

Notes:

• Call player.update(timeline) if you update the timeline.

📤 Export

await omni.render(timeline, framerate)

🧩 Timeline Format (TimelineFile)

All durations and timestamps are in milliseconds.

{
	"format": "timeline",
	"info": "https://omniclip.app/",
	"version": 0,
	"rootId": 123,
	"items": [
		{"id": 123, "kind": 0, "childrenIds": [456, 789]},
		{"id": 456, "kind": 2, "mediaHash": "...", "start": 0, "duration": 3000},
		{"id": 789, "kind": 4, "content": "Hello", "duration": 1500}
	]
}

Timeline items:

• 0 Sequence
• 1 Stack
• 2 Video
• 3 Audio
• 4 Text
• 5 Gap
• 6 Spatial
• 7 Transition
• 8 TextStyle

🗺️ Roadmap

• CLI commands:

# build a reusable template from a timeline
omnitool build-template promo.json
# validate a timeline file
omnitool validate promo.json
# export a timeline to a video file
omnitool export promo.json --output final.mp4
# batch export multiple timelines
omnitool batch-export ./projects/* --output-dir ./exports
# headless timeline viewer
omnitool preview promo.json
# auto-fit timeline elements
omnitool optimize promo.json
# prompt-to-timeline generation
omnitool ai "make a 15s promo for tea"

• smooth seeking
• keyframes
• server-side, not just browsers