Seedance 2.5 Prompts That Hold Together for 30 Seconds

Seedance 2.5 is presented as a video-generation system capable of producing up to 30-second videos from structured prompts and as many as 50 multimodal references, including images, clips, and audio. Its recommended prompt framework combines a required subject and action with optional scene, visual style, camera, and audio instructions, while bracket syntax distinguishes music, sound effects, dialogue, and subtitles. The guidance emphasizes explicitly assigning each reference file to a specific character, prop, location, motion, or sound role, selecting references by scene rather than forcing all inputs into one output, and using staged actions with clear end states to maintain continuity in longer videos. It also outlines specialized approaches for editing source footage, replacing subjects or backgrounds, extending videos forward or backward, using first and last frames, keyframes, storyboards, and coarse or fine blockout references, as well as creating transitions and expressing emotion through observable behavior and camera direction. Certain task types automatically lock aspect ratio or duration based on input media, and the guide notes practical limits such as imperfect timestamp precision, possible duration drift in edits, and the need for post-production for exact text or graphic details. Atlas Cloud is described as planning Seedance 2.5 API access, while Seedance 2.0 already supports similar reference-binding patterns for testing prompt templates.

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