OneAct
Open source · GPL-3.0 GitHub ↗

One stage. One take.

Record at your own pace. What you see is what you save.

Download on GitHub Requires macOS 15 or later · Apple Silicon · Beta

Give your story the space it needs.

Speak to camera, walk through an idea, or keep your words close.

OneAct in Camera mode, with a fictional clay presenter centered against a warm studio background.

Set your frame, add a gentle touch-up, and press Record.

OneAct in Screen + Camera mode, showing a presentation with a fictional illustrated presenter overlaid in the lower right.

Show the work. Stay in the picture.

When your story needs a demonstration, bring a display, app, or window into the shot. Walk through your work with your camera alongside it.

OneAct's Screen + Camera workspace with the real teleprompter panel open above the preview, showing an English sample script and reading controls.

Your script keeps up with you.

Turn on Follow voice and the teleprompter listens as you read: it moves when you speak and waits when you pause or go off script. Your words stay above the canvas and out of the finished video.

Actual OneAct interface. Illustrative scenes.

Made for the way you tell a story.

What you see is what you save

Compose your shot live with backgrounds, picture-in-picture, or person cutout, plus a gentle touch-up for light, warmth, and skin. Your canvas becomes the finished video.

Press Space to pause

Need a breath? Press Space, reframe if you like, and press it again to carry on in the same recording. Paused time stays out of your video.

A script that keeps up with you

Turn on Follow voice and the teleprompter scrolls as you speak, holds when you pause, and waits while you go off script. English and Chinese scripts both work.

Bring your screen when it helps

A product walkthrough, a lesson, a work in progress. Add screen sharing whenever showing something helps you tell the story.

Ready the moment you stop

Press Record and you are rolling, with no save dialog first. Stop, and your take is already saved in H.264 or ProRes 422: play it back, rename it, or discard it and go again.

Made on your Mac

Recording, scripts, speech recognition, touch-up, and person cutout all run on your Mac. No account required, and your voice never leaves it.