ByteDance Seedance 2.0 Fast Reference To Video (Official Edition)

Reference-to-video is Seedance 2.0's flexible mode: feed it images, video, and audio references plus a text prompt, and it generates a clip shaped by all of them. The Fast tier keeps that flexibility at draft speed, and this Official Edition node calls ByteDance's official seedance-2-0-fast-official/reference-to-video endpoint - the vendor-spec surface, with aspect_ratio rather than ratio, duration as a preset dropdown, and a notably long 15-second default. If you're building reference-driven shots and want ByteDance's documented behavior plus longer default clips, this is the node.

How it works

Cloud execution through BizyAir: reference media uploads to api.bizyair.ai, the job runs on the official Fast reference endpoint, and the clip downloads back into ComfyUI as a native VIDEO tensor. No local model, no VRAM, metered billing against BizyAir credits.

Inputs that matter

• prompt - the text steer (1–20480 characters). Motion and intent, not a still image description.
• images / videos / audios - the autogrowing reference slots. Images steer look and character, a reference video steers motion, audio steers mood. One consistent reference beats several conflicting ones.
• resolution - defaults to 720p, the vendor-spec ceiling for this tier.
• duration - a dropdown, default "15" seconds. The official API exposes fixed presets rather than free-form lengths, and 15s is the long end of the range - good for full scenes, watch your credits.
• aspect_ratio - default 16:9.
• seed - integer, default 0.
• generate_audio - default on.
• api_config / skip_error - per-request key/base override and placeholder-on-error.

Outputs: video, request_id, urls.

Install and get going

ComfyUI Manager → "BizyAirPlus", or:

cd /path/to/ComfyUI/custom_nodes
git clone https://github.com/siliconflow/BizyAirPlus.git
cd BizyAirPlus
python -m pip install -r requirements.txt

Restart, register at bizyair.ai, set the key in Settings > BizyAirPlus > API Key (or BIZYAIR_API_KEY), and click the BizyAirPlus action-bar toggle ON.

Gotchas

Setup trio as always - missing key, toggle off, deps in the wrong Python (python -m pip show bizyair-cloudberry). Two practical notes: the 15-second default is generous and billed, so if you're drafting, drop duration to a shorter preset before queuing. And keep references consistent in aspect ratio and lighting - the official endpoint is no more forgiving of contradictory references than the channel edition, it just bills you faster.