seedance-2-5

Original：🇺🇸 English

Translated

Generate 4-30 second cinematic video with ByteDance Seedance 2.5 through fal.ai, Volcengine Ark, Runway, or ComfyUI Partner Nodes. Use for long single generations, synchronized audio, and large multimodal reference sets (up to 30 images, 10 videos, and 10 audio clips).

2installs

Sourcecalesthio/openmontage

Added on2026-08-15

NPX Install

npx skill4agent add calesthio/openmontage seedance-2-5

SKILL.md Content

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Seedance 2.5

Seedance 2.5 extends the Seedance 2 family to 4–30 second 480p/720p clips and larger multimodal reference sets. It is hosted; there are no local model weights in OpenMontage.

Choose a supported route

Route	Tool call	Notes
fal.ai	`seedance_video` , `model_version: "2.5"`	T2V, I2V, and reference-to-video
Volcengine Ark	`seedance_ark` , `model: "2.5"`	First-party model ID `doubao-seedance-2-5-260628` ; custom token price required for cost estimates
Runway	`runway_video` , `model: "seedance2_5"`	T2V, I2V, V2V; 480p/720p
ComfyUI Partner Node	`comfyui_video` , `model_family: "seedance_2.5"`	Hosted and paid despite running in a ComfyUI graph

Do not invent a Replicate, HeyGen, or Higgsfield identifier when their current public API schema does not list Seedance 2.5.

Reference limits

Up to 30 reference images.
Up to 10 reference videos.
Up to 10 reference audio clips.
Keep combined reference video/audio duration within the provider's documented ceiling; Runway caps it at 30 seconds.
For Runway video-to-video, the source video consumes one video slot.

Reference inputs are provider-specific. fal.ai uses

image_urls

,

video_urls

, and

audio_urls

internally. Runway uses

references

,

referenceVideos

, and

referenceAudio

. Ark uses typed content entries with roles. Always call the OpenMontage tool instead of constructing a provider payload manually.

Prompting

Lead with the shot structure, then subject, action, camera, lighting, and audio. For multi-shot work, give each beat an explicit time range and use quoted text for dialogue. Reference each supplied asset by a stable role in the prompt. Thirty seconds is a ceiling, not a target: use a shorter generation when the scene has only one meaningful action.

Cost and verification

All supported routes are paid. Confirm the exact provider/model before calling and review the result for identity continuity, cuts, lip sync, audio artifacts, and prompt adherence. ComfyUI Partner Nodes use prepaid Comfy credits and are not an offline fallback.