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Complete guide to Seedance 2.5

Getting startedUse casesAdvanced setupTipsFAQ

Getting started

Access Seedance 2.5 through a third-party platform that integrates it (such as Renderforest) or via its API. Describe the scene in detail: camera, lighting, ambience, and specific actions, and for dialogue, put the exact words in double quotes. You can provide up to 50 multimodal references (images, text, style frames, character references) to maintain visual consistency, and set the duration between 4 and 30 seconds, or leave it on automatic smart duration with -1.

Use cases

Long videos with native synchronized audio
Generate clips up to 30 seconds long in 4K with dialogue, sound effects, and ambience included in the same generation, without adding audio afterward.
Multi-shot narratives with consistent characters
Keep the same character and setting recognizable across multiple cuts within a single clip, thanks to the multimodal reference system.
Lip-synced dubbing in multiple languages
Generate lip-synced dialogue directly in 8 or more languages, useful for content targeting different markets.
Animation guided by multiple references
Combine up to 50 inputs (images, text, style frames) to precisely guide the output, beyond a simple text prompt.

Advanced setup

  1. Multimodal reference system
    Accepts up to 50 combined inputs (images, text, style frames, character references) to maintain visual consistency throughout the generation.
  2. Duration control
    You can set any duration between 4 and 30 seconds, or use -1 to let the system decide the optimal duration automatically.
  3. Native audio generation
    Includes lip-synced dialogue, sound effects, and ambience generated in the same pass as the video, not as a separate step.

Tips

  • Describe camera movements, lighting, and mood precisely in the prompt — the model responds better to detailed direction instructions than to generic descriptions.
  • Put the exact dialogue in double quotes if you need characters to say specific words with correct lip sync.
  • Use multimodal references when you need to keep a character recognizable across multiple scenes, instead of regenerating each shot separately.
  • Use smart duration (-1) when you're not sure how long the scene should be and prefer to let the model decide based on the content.

FAQ

Who develops Seedance 2.5?
ByteDance's Seed research team, released in 2026.
Does it generate audio along with the video?
Yes, it natively includes lip-synced dialogue in multiple languages, along with sound effects and ambience, in the same generation.
How do you access it from outside China?
International users mainly access it through third-party platforms that integrate it (such as Renderforest) or directly via API.
Based on Researched at mindstudio.ai/blog/what-is-seedance-25-bytedance-video-model and renderforest.com/blog/how-to-use-seedance-2-5 (August 2026).
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