Guides

Install Concat

Every build is a GitHub Releases asset. The download picker hands you the right one; this page covers what happens after.

Your first edit

From the start screen to an exported file in five steps: new project, import, cut, a title, export.

Where everything is

A map of the window: the four panes, the title strip, the menus, the tray and what each button on it does.

System requirements

Concat runs everything on your machine, so the hardware sets the ceiling.

Auto-captions

One button transcribes a clip on your machine and puts a title per phrase on the timeline. Where the button is, which model to pick, and how to restyle the result.

Text to speech and voice cloning

Type a script, pick a voice, and the read lands on the timeline. Where the button is, which of the three voice models to use, and how to clone a voice from a recording.

Record a voiceover

Talk over the edit while it plays. The take lands on the timeline where you started.

Clean up a voice

Three switches in the Audio tab take the room out of a recording and bring it to a broadcast level. Plus the fun ones: chipmunk, robot, telephone.

The AI models

Captions, voices, cutout and enhance run on models that download once from Settings and then work offline. What each one is, how big it is, and where it goes.

Titles and text

Add a title, style it with fonts, stroke, shadow and a background plate, style many at once, and make that look the default.

Effects, filters and transitions

The Library pages for looks and effects, and the one thing to know: a single click auditions, a double-click or the plus applies.

Remove a background

Cut a person or an object out of a clip with no green screen, paint the mask yourself when the model gets it wrong, or key a real green screen.

Keyframes

Animate position, scale, rotation, opacity, volume or any effect knob with the diamond next to it, then shape the motion in the Keyframes pane.

Cut on the timeline

Split, trim, ripple, merge, freeze, reverse, speed, detach audio, several timelines per project. The whole editing vocabulary on one page.

Export

The Export sheet, every option on it, and which ones to leave alone. H.264, HEVC or AV1, up to 4K 60, 10-bit, with no watermark.

Keyboard shortcuts

Every key Concat listens to, on a Mac and on Windows and Linux.

Settings

The gear at the top right. Seven pages: General, Appearance, Transcriber, Speech, Remote, Version, About. What each row does.

Concat on a phone

The Android and iOS app is its own editor, built for a thumb. Where everything moved to.

Update Concat

The app updates itself from Settings › Version, and can go back a release too.

Report a problem

Every run writes a log. Settings has the buttons that get it, and your system information, into an issue.

Control Concat from a script

Anything the window can do to a project, a program can do through the API. Here is where that starts.