Seedance AnswersUpdated Mar 10, 2026
How do I extend AI video length?
Short answer
Use a dedicated AI video extender to continue the last frame of your clip, or generate overlapping segments with consistent prompts and blend them together for seamless longer content.
Recommended mode: DirectorScenario: Turning a 5-second AI-generated scene into a 30-second continuous shot for a product commercial or narrative short film.
Execution Steps
- 1Generate your initial high-quality base clip at the maximum supported duration.
- 2Use the video extension feature to continue from the last frame, providing a follow-up prompt that describes the next action or camera movement.
- 3Review the extended segment for visual continuity including lighting, color grade, and subject consistency.
- 4Repeat the extension process in increments, checking each join point for artifacts or style drift.
- 5Apply a final color grade and audio layer across the full extended clip to unify the segments.
Prompt Template
Extend this video clip by 5 seconds. Continue the current camera motion and subject action smoothly. Maintain the same lighting, color palette, and visual style. Do not introduce new subjects.
Common Failure Points
- Attempting to extend by too many seconds at once, which causes the model to hallucinate new subjects or backgrounds
- Changing the prompt dramatically between extensions, breaking visual continuity
- Ignoring the transition frames where segments join, which often show subtle flickering
- Not maintaining a consistent seed or style parameter across extension passes
FAQ
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