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Seedance 2.5 Reference to Video 4K: Multi-Reference Video Generation on Models and API | RunComfy

bytedance/seedance-2.5/reference-to-video/4k

Seedance 2.5 Reference to Video 4K blends reference images, clips, and audio into 4K video that holds subject identity and style.

Text prompt describing the desired video, referencing the provided images, video clips, and audio as environment, motion, and mood cues.
Image 1
Reference images to steer environment and style. Up to 9 images.
Loading video...
Reference video clips for camera motion and rhythm. Up to 3 clips.
Reference audio for mood and pacing. Up to 3 files.
Aspect ratio of the generated video.
The duration of the generated video in seconds. Between 4 and 30.
When true, the model outputs video with synchronized audio (speech, SFX, music).
Idle
Billed at $1.09 per second on total counted video seconds (reference video duration plus output duration). Image and audio references are not billed as duration.

Introduction To Seedance 2.5 Reference to Video 4K

ByteDance's Seedance 2.5 Reference to Video 4K steers a 4K clip with reference images plus at least one reference video, carrying identity, styling, and camera rhythm into the render. Trading a separate finishing pass after low-res reference trials, it lets previz artists and brand teams lock a look once and output at master size. For developers, Seedance 2.5 Reference to Video 4K on RunComfy can be used both in the browser and via an HTTP API, so you don't need to host or scale the model yourself.
Ideal for: Identity-Locked Character Finals | Reference-Matched Product Films | Style-Consistent Campaign Sets

Parameters#


ParameterRequiredTypeDefaultRange / OptionsDescription
prompt*Yes (*)string——Scene description using your references as cues
imagesNoarray (image URIs)—0–9Reference images for look and identity
videos*Yes (*)array (video URIs)—1–3Reference clips for motion and rhythm (at least one required)
audiosNoarray (audio URIs)—0–3Reference audio for mood and pacing
aspect_ratioNostring16:916:9, 9:16, 1:1, 4:3, 3:4, 21:9, adaptiveOutput frame ratio
durationNointeger54–30 (seconds)Clip length
generate_audioNobooleantruetrue / falseNative synchronized audio

Pricing#


Seedance 2.5 Reference to Video 4K bills on total counted video seconds (reference video duration + output duration):


  • $1.09 per second

Image and audio references are not billed as duration.

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Frequently Asked Questions

What is Seedance 2.5 Reference to Video 4K best used for?

Seedance 2.5 Reference to Video 4K is a ByteDance reference-guided endpoint that renders a 4K clip from reference images and clips. It fits identity-locked character finals, reference-matched product films, and campaign sets that must share one look across several shots.

What references does Seedance 2.5 Reference to Video 4K accept, and which are required?

Seedance 2.5 Reference to Video 4K takes up to 9 reference images, 1 to 3 reference videos, and up to 3 reference audio files. At least one reference video is required; images and audio are optional cues for look, identity, and mood.

How is Seedance 2.5 Reference to Video 4K billed on RunComfy?

Billing counts total video seconds, meaning your reference video duration plus the output duration, at $1.09 per second. Reference images and audio are not billed as duration, so trimming long reference clips is the main way to control what Seedance 2.5 Reference to Video 4K costs per run.

What other parameters does Seedance 2.5 Reference to Video 4K expose?

Beyond the references, Seedance 2.5 Reference to Video 4K accepts a prompt, aspect_ratio (16:9, 9:16, 1:1, 4:3, 3:4, 21:9, or adaptive), duration from 4 to 30 seconds with a default of 5, and generate_audio. Resolution is fixed at 4K.

How do I write a prompt that actually uses my references?

Say what each reference is for rather than redescribing it. Phrases like "using the reference image for wardrobe and the reference clip for camera rhythm" tell Seedance 2.5 Reference to Video 4K which cue drives which part of the shot, which keeps identity and motion from fighting each other.

Can developers call Seedance 2.5 Reference to Video 4K through the RunComfy API?

Yes. Build the shot in the RunComfy model UI, then call the same Seedance 2.5 Reference to Video 4K template through the RunComfy API, passing publicly reachable URLs for every reference. Both paths consume usd / credits from the same balance.

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Examples Of Seedance 2.5 Reference to Video 4K

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