ByteDance audio video model · ByteDance Seed
Seedance 2.5 guide for longer, controlled AI video
A practical, source reviewed guide to Seedance 2.5 for creators comparing long form generation, multimodal references, editing, and production fit.
The short answer
Seedance 2.5 is ByteDance Seed's audio video generation model for clips up to 30 seconds in one pass. Its main step forward is not duration alone. It combines longer storytelling with broader reference input, timestamp level control, extension, and editing features aimed at more complete creative work.
When to choose it
Choose Seedance 2.5 when a shot needs more narrative room, several references, or precise creative direction. Seedance 2.0 remains a sensible choice for shorter 15 second work and broader generation entry points inside Genflow.
Official model facts
What the official sources say
Vendor documented capabilities, kept separate from Genflow product settings.
Up to 30 seconds in one generation
ByteDance describes 30 second audio video clips with multi round extension and improved continuity across shots.
Expanded multimodal reference
The official launch notes up to 30 images, 10 video clips, and 10 audio clips as reference material in one pass.
More precise generation and editing
Timestamp level direction, camera perspective editing, green screen work, and reference based editing are highlighted by the model team.
Genflow
Available in Genflow
Read directly from the current Genflow model configuration.
- Generation
- Reference to video
- Duration
- 4 to 30 seconds
- Aspect ratios
- 16:9, 4:3, 1:1, 3:4, 9:16, 21:9
- Output
- 480p, 720p
- Native audio
- Yes
Where it fits
- Longer multi shot narratives without forcing every idea into a short clip.
- A larger reference set for characters, locations, movement, sound, and camera language.
- Audio and visual generation are designed together, which helps when sound is part of the creative brief.
What to review
- ByteDance still identifies room to improve complex motion physics and scenes with several interacting subjects.
- The full official feature set can differ from the controls exposed by a specific product or API integration.
Seedance 2.5
Practical use cases
Narrative campaign films
Plan a 20 to 30 second sequence with several connected shots, dialogue, ambience, and a clear finish.
Reference led product stories
Use product, talent, location, movement, and sound references to keep a commercial brief grounded.
Controlled video revisions
Use time based direction when only a particular action, camera move, or narrative beat needs attention.
FAQ
Questions creators ask
What is Seedance 2.5?
Seedance 2.5 is an audio video generation model from ByteDance Seed. It focuses on longer storytelling, multimodal reference control, extension, and more precise generation and editing.
How long can Seedance 2.5 videos be?
The official model page states that a single generation can be up to 30 seconds. The launch article also describes multi round extension for longer sequences.
Is Seedance 2.5 available in Genflow?
Yes. Genflow currently exposes Seedance 2.5 for reference to video generation with audio. The exact duration, aspect ratio, and resolution choices are shown on this page from Genflow's live model configuration.
Primary sources
Facts on this page are checked against these official model sources.