How Do You Stitch Several AI Video Clips Into One Edited Video?
Join AI clips into one video in the Timeline Editor: trim, split and reorder, add transitions, two audio tracks and text, then render in 9:16, 16:9 or 1:1.
You stitch AI clips together in the Timeline Editor by placing them in order on one video track, trimming each to the part you want, adding transitions, laying music and text over the top, and rendering. A project can hold up to 30 clips and 180 seconds of output, plus two audio tracks and up to 50 text items. Rendering costs a flat 10-credit fee, shown in the editor before you render.
Updated October 2026.
Why one generation is never the finished video
A generated clip is a shot, not a video. It has one camera move, one action and a fixed length, and it usually arrives silent or with a short audio bed. A finished piece needs a sequence: an opening that earns attention, a middle that develops the idea, and an ending that lands. It also needs a shape that fits the platform, and sound that carries across cuts.
That is what the timeline is for. It takes the raw shots and turns them into a sequence with pace, transitions and a consistent frame. It is also where you fix the things a single generation cannot: a clip that runs two seconds too long, a cut that arrives before the action finishes, or a music track that needs to start later.
Be clear about what kind of editor this is. It is a sequence editor with one video track, two audio tracks and text overlays. It is not a layered compositor, so it does not put a video on top of another video, and it is not a full editing suite with colour grading, masks or keyframes. Within those limits it covers the assembly work that most short videos need.
Pull clips from My Creations or upload your own
Every source is a reference, never a URL. You can pick a finished video, image or audio file from your own creations in My Creations, or upload your own file to the project.
- Video uploads: up to 500 MB per file.
- Image uploads: up to 10 MB.
- Audio uploads: up to 25 MB, accepting common audio formats, including MP3.
Each source contributes a window of at most 10 minutes to the project, which is longer than any clip you are likely to place. Images can sit on screen for up to 30 seconds each, with an optional slow Ken Burns zoom. The editor works best on a computer; the mobile layout can add clips, reorder, trim, add text and music, and render, but the full timeline controls are easier with a mouse.
Trim, split and reorder
The video track is a sequence of clips. Drag a clip to move it, drag its edge to change the kept window, and use the split control to cut at the playhead. The split shortcut is S on a desktop keyboard, and the same action is available as a button.
Three limits shape how you cut. A clip cannot be shorter than 0.5 seconds. A project cannot hold more than 30 clips. The total output cannot exceed 180 seconds, and the editor warns you when the sequence passes that limit. Trimming is always a window on the source: the original file is not modified, so you can extend a clip again if you cut too far.
Reordering is the most useful edit and the least obvious. If a clip explains the product better than the clip you put first, move it. The opening shot should be the one that makes sense without any context, even if it was generated last.
Transitions versus hard cuts
A hard cut is the default and usually the right choice. It moves the viewer from one shot to the next with no ceremony, which suits fast social video. A transition draws attention to the change, so save it for a change the viewer should notice: a jump in time, a change of place, or the move from a problem to a solution.
| Option | Length | When to use it |
|---|---|---|
| Cut | None | Default between shots in the same scene |
| Crossfade | 0.2 to 2.0 s | A soft change of mood or location |
| Fade through black or white | 0.2 to 2.0 s | A chapter break or a deliberate pause |
| Dissolve | 0.2 to 2.0 s | A gentle move between related images |
| Wipes and slides | 0.2 to 2.0 s | Directional energy, used sparingly |
Every transition runs from 0.2 to 2.0 seconds, and the duration is set per clip. Short transitions around half a second usually read as polish; long ones read as a statement. If every cut has a two-second dissolve, the video feels slow, and the transitions start competing with the content.
Two audio tracks, text overlays and optional auto-captions
The project has two audio tracks. Each accepts up to 20 items, and each item has its own volume, fade in and fade out, so you can keep music under a voice and duck it where the speech matters. A typical setup is a voice-over on one track and a music bed on the other; a second music cue or a sound effect can sit as another item on the same track.
Text is a separate layer with up to 50 items. Each item is limited to three lines and 200 characters, which is enough for a title, a label or a call to action. There are five styles (Bold, Subtitle, Highlight, Neon and Minimal) and three positions (top, centre and bottom). Text has a start and an end time, so it can appear only while the relevant shot is on screen.
Auto-captions are optional. Turn them on and choose a caption style; the speech in the rendered video is transcribed and captioned during the render, and the extra credits are quoted before you confirm. The cost follows the same per-minute rule as AI Captions. Captions are made from the video’s speech, so they are not shown in the preview. If you need to correct words, the AI Captions tool gives you an editable transcript before rendering.
Choose 9:16, 16:9 or 1:1, the render fee and the 180-second limit
Pick the output canvas before you arrange anything, because the framing decisions follow from it. The options are 9:16 at 720 by 1280, 16:9 at 1280 by 720, and 1:1 at 960 by 960. A vertical source in a vertical canvas fills the frame; a horizontal source in a vertical canvas is cropped or padded, and the editor’s fit setting decides which.
The project is capped at 180 seconds of output. That is a deliberate limit: it covers a YouTube Short, a Reel, a TikTok and most ad formats, and it keeps rendering fast. If your cut is longer, split it into parts rather than squeezing it under the cap.
Rendering costs a flat 10-credit fee, and the editor shows the live quote before you confirm. Auto-captions add their own per-minute charge on top. A failed render is refunded. One-time credit packs never expire, and the options are on the pricing page.
Plan the clips first: a shot list and a consistent look
The timeline cannot fix a set of clips that do not belong together. Plan the shots before you generate them, even loosely: an opening wide shot, a detail, an action, a closing product shot. Give each shot a job in the sequence, then generate it for that job.
Consistency is the other half. Keep the aspect ratio, the lighting direction and the colour palette consistent across clips, and describe the same subject the same way each time. Our guide to avoiding the slideshow look covers the visual side, and making an AI video longer explains how to extend a short into a sequence. For a wider comparison of editing routes, see the AI video editors round-up.
Frequently asked questions
How many clips can one project hold?
Up to 30 clips on the video track, with a total output of 180 seconds and a 0.5-second minimum per clip.
Can I put one video on top of another?
No. This is a sequence editor with one video track, two audio tracks and text overlays. It does not composite video over video.
Can I add music and a voice-over at the same time?
Yes. There are two audio tracks, each with volume and fade controls, so a voice-over and a music bed can play together.
How much does a render cost?
A flat 10-credit render fee, shown in the editor before you render. Auto-captions add their own per-minute charge. Failed renders are refunded.
Does it work on a phone?
Yes, for adding clips, reordering, trimming, text, music and rendering. The full timeline works best on a computer.
Open the Timeline Editor, start a project in the shape you need, and drag in your first two clips. New accounts start with 10 free credits and no card required, which covers the 10-credit render fee, so you can assemble one short video and see the sequence before you commit to a longer edit.
Ready to try it?
Create your first AI video in minutes — no credit card required.
Start Creating Free →