emily2040/seedance-motion

seedance-motion

Use physical verbs and consequences. Motion should be observable on screen, timed within the clip, and assigned to a subject or object. Prefer one strong action with a visible endpoint over several vague actions competing for attention.

Load [ref:reference-workflow] for video-motion references, [ref:shot-list-continuity] for action handoffs across shots, and [ref:examples-by-mode] for safe edit, extend, and R2V patterns.

Motion Contract

State: actor/object, action, force level, timing, physical consequence, continuity requirement, and endpoint.

| Motion type | Strong phrase | Weak phrase | |---|---|---| | Subtle acting | Character A inhales, grips the cup tighter, then sets it down without looking away | she feels nervous | | Product material | condensation beads gather, merge, and slide down the bottle neck | the product looks refreshing | | Choreography | Character B ducks under the swinging bag, pivots left, and stops in a guarded stance | fast action fight scene | | Object physics | paper receipt lifts in the fan breeze, flips once, and lands face-up | papers move dynamically | | Environmental motion | rain streaks diagonally across the backlight while puddle ripples spread from footsteps | stormy weather atmosphere |

Timing Pattern

Use a three-beat structure for short clips: setup, action, changed end state. Example: 0-2s: candle flame steady; 2-4s: door opens and flame bends; 4-6s: smoke trail curls toward the hallway. Time segmentation is useful for action, VFX, lip-sync, and product demonstrations, but avoid frame-perfect overload unless the user truly needs it.

When sound drives the motion, pair each visible change with one beat or SFX: door click at 2s, light pulse on the downbeat, hand releases the cup on the final chime. Do not ask for many cuts, locations, and micro-actions inside one short clip.

Reference Motion Rules

For reference footage, use only owned, licensed, public-domain, stock, mocap, rehearsal, or self-recorded material. Map [Video1] to motion, camera, timing, or blocking, not identity, unless the identity is authorized. If a reference contains a real person, transfer only general motion or camera behavior and explicitly exclude likeness transfer.

Stability Rules

Hands, faces, logos, and product geometry drift when too many actions occur. Reduce motion around fragile details: lock the camera for lip-sync, keep hands in simple poses, ask product parts to remain rigid, and move light or environment instead of the core identity anchor.

Output Contract

Return the motion phrase, timing pattern, reference role map if any, and repaired prompt language.