Long AI video without losing the scene
Two ways to go long: a single 4 to 30 second take on Seedance 2.5, or the long video mode that assembles up to 180 seconds with a continuity setting. Resolutions run from 480p to 1080p, the credit estimate appears before you generate, and you need an account to generate.
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Up to five global reference images; only valid in consistent mode
Long Video · AI Video Generator 180 Seconds
Create Longer AI Videos with Better Consistency
Unlike traditional AI video generators that only create short clips, our Long Video model creates connected scenes with consistent characters, motion and visual style.
Up to 180 Seconds
Generate extended AI videos for storytelling, ads and cinematic scenes.
Consistent Characters
Keep characters, objects and scenes consistent throughout longer videos.
Multi-modal Control
Use text, images and references to guide video generation.
- One generation is capped at 30 seconds on Seedance 2.5, 15 seconds on Seedance 2.0 and 5 seconds on Veo 3.1.
- The long video mode assembles a sequence up to 180 seconds, with a consistent or seamless continuity setting.
- Long video mode runs on Seedance 2.0 and HappyHorse 1.5, at 480p, 720p or 1080p.
- Continuity is a setting, not a guarantee: scene drift is still possible across a 180 second sequence.
Length and output at a glance
How long can one generation actually be?
It depends on the model, and the honest range is narrower than most long-video pages suggest.
| Route | Maximum length | Resolution | How it works |
|---|---|---|---|
| Seedance 2.5 single take | 30 s | 480p / 720p | One continuous generation, length selectable per second |
| Seedance 2.0 single take | 15 s | up to 4K | One continuous generation |
| Veo 3.1 single take | 5 s | up to 4K | Fixed five second shot |
| Long video mode | 180 s | 480p / 720p / 1080p | Sequence assembled with a continuity setting |
How does the long video mode work?
You set a duration and a continuity mode, and the mode assembles the sequence instead of asking one generation to hold the whole runtime.
- 01
Pick the provider
Seedance 2.0 or HappyHorse 1.5. Seedance supports native audio continuity; HappyHorse does not expose that switch.
- 02
Write one prompt for the whole sequence
Describe the through-line — what happens from the first second to the last — rather than a single shot.
- 03
Set duration and continuity
Up to 180 seconds. Consistent keeps the scene tied together; seamless drops the reference images and favours cuts that flow.
- 04
Add up to five reference images if the scene must match
References only apply in consistent mode. Seamless mode clears them by design.
- 05
Review the estimate and generate
Long sequences cost more than a single take; the estimate is shown before submission.
Where long video breaks
Long outputs fail in specific, repeatable ways. Planning around them is cheaper than regenerating.
- Scene drift: lighting, wardrobe or set dressing shifts gradually across the sequence.
- Motion repetition: a gait or camera move can loop after twenty seconds.
- Prompt dilution: a single paragraph that works for eight seconds often loses specificity at two minutes.
- Cost: a long sequence consumes far more credits than one take, so test at a short duration first.
- The 180 second ceiling is a product limit, not a model capability claim — nothing above it is available in this workspace.
Which route should you choose?
Choose the shortest route that satisfies the destination.
- 8 second product loop → Seedance 2.5 single take, 480p while iterating.
- 30 second vertical story → Seedance 2.5 single take at 720p, 9:16.
- 60 to 180 second sequence → long video mode with consistent continuity and reference images.
- 4K hero shot → Seedance 2.0 Pro or Veo 3.1, accepting the 15 or 5 second cap.
Long video questions
What is the real maximum length?
30 seconds in a single generation on Seedance 2.5, and 180 seconds in the long video mode. Anything longer is not available in this workspace.
Is 180 seconds one continuous generation?
No. Long video mode assembles a sequence with a continuity setting. It is one output, but not one model call holding 180 seconds of attention.
What do the continuity modes change?
Consistent keeps the scene tied to your prompt and reference images across the sequence. Seamless prioritises flowing transitions and drops the reference images.
Which models power the long video mode?
Seedance 2.0 and HappyHorse 1.5. Seedance supports native audio continuity; HappyHorse does not.
What resolution can a long video be?
480p, 720p or 1080p in long video mode. A single Seedance 2.5 take is limited to 480p or 720p.
How much does a long video cost?
Long sequences consume credits in proportion to length and resolution. The estimate is shown before submission; test a short duration first rather than discovering the cost on a full run.
Can I keep the same character for 180 seconds?
Better than a single prompt alone, because consistent mode and reference images carry the look forward, but drift is still possible. Review in segments.
Can I add my own music afterwards?
Yes. Treat the generated video as a silent or ambience-bearing asset and add licensed music in your editor; Seedance 2.5's generated audio is not a licensed library.
Does long video mode take vertical video?
Yes. 16:9, 9:16, 1:1, 4:3 and 3:4 are all selectable.
Why is my long video less consistent than the short one?
The longer the sequence, the more chances for lighting, wardrobe and set details to drift. Shorter segments with the same references usually hold better than one long run.
Key takeaways
- 1.A single generation caps at 30 seconds on Seedance 2.5.
- 2.The long video mode reaches 180 seconds by assembling a sequence, not by one long model call.
- 3.Continuity is a setting with real limits; review in segments.
- 4.Start short and cheap, then extend only what works.
Related tools
Product photo to a short platform-ready clip.
Keep a face and outfit stable with reference images.
Write a prompt that survives a longer sequence.
Durations, resolutions, reference limits and credit rates.