How Long Can an AI-Generated Video Be? (And How to Make Longer Ones)
MyDreamVid · 2026-09-11
The honest answer comes in two parts. A single generated clip is short: Seedance 2.5 goes up to 30 seconds, and the 2.0 family (2.0, Fast, Mini) up to 15 seconds, with a 4-second minimum. A finished video, though, can be as long as you're willing to build — because long AI videos are made the way long real videos are made: shot by shot.
Why single clips are capped
Video models generate every frame of a clip as one coherent piece — the longer the clip, the harder it is to keep motion, identity and lighting stable, and the compute cost grows with every second. Model providers cap clip length where quality stays reliable. This is true across the industry, not just here; anyone advertising unlimited single-shot length is stitching behind the scenes.
The per-model numbers
| Model | Clip length | Notes |
|---|---|---|
| Seedance 2.5 | 4–30 s | highest quality, native audio |
| Seedance 2.0 | 4–15 s | 1080p available |
| Seedance 2.0 Fast | 4–15 s | fast, audio free |
| Seedance 2.0 Mini | 4–15 s | cheapest, audio free |
Pricing is per generated second at the same rate regardless of clip length — a 15-second clip costs three times a 5-second clip, not more. Exact per-second rates are on the pricing page.
Making a one-minute (or ten-minute) video
The workflow is a shot list. Split your video into shots of 4–15 seconds each, generate them in order, and join them. Doing this by hand works; the MyDreamVid film workspace automates the whole chain:
- an idea → outline → script → shot list pipeline (AI-assisted or pasted in),
- shots generated in order, two at a time, each quoted and reserved separately,
- last-frame chaining — a shot can start from the previous shot's final frame, so continuous action stays continuous,
- reference images for consistent characters across all shots,
- export as a rough-cut MP4 or a ZIP of clips for finishing in an editor.
A project holds up to 400 shots — at 8 seconds a shot, that's over 50 minutes of footage, far beyond what most people mean by "a long AI video". In practice, 1–5 minute films are the sweet spot.
Budgeting a longer video
Since cost is per second, a longer video's cost is simply its length times the per-second rate of your model and resolution. Two habits keep budgets sane: draft every shot on 2.0 Mini or Fast first, and only re-render the shots you'll keep on 2.5. Batch generation shows the total quote up front, and each shot's credits are only reserved when that shot starts — a failed shot refunds itself.
Frequently Asked Questions
Can I generate a 60-second video in one go?
Not as a single clip — 30 seconds on Seedance 2.5 is the ceiling. A 60-second video is typically 5–10 chained shots.
Do longer clips cost more per second?
No. The per-second rate depends on the model and resolution, not the clip length.
Will viewers notice the cuts between shots?
Hard cuts every few seconds are the normal grammar of film — viewers are used to them. For moments that must flow without a cut, use last-frame chaining so consecutive shots connect frame-to-frame.
How long does a long video take to generate?
Shots run in parallel (two at a time) at roughly 1–3 minutes per shot, so a 20-shot film typically finishes within half an hour — you can keep editing later shots while earlier ones render.