KIE Seedance 2.0 (Video)

Generate Seedance 2.0 videos with the verified bytedance/seedance-2 model.

Status: Experimental development pass. Credit Warning: Seedance 2.0 can take several minutes per job. Use KIE Seedance 2.0 Preflight first.

Inputs

prompt (STRING, required): main prompt text.
first_frame (IMAGE, optional): single first frame image.
last_frame (IMAGE, optional): single last frame image. Requires first_frame.
reference_images (IMAGE, optional): one or more reference images for multimodal reference mode.
reference_video (VIDEO, optional): one reference video for multimodal reference mode.
reference_audio (AUDIO, optional): one reference audio input for multimodal reference mode.
generate_audio (BOOLEAN, optional): asks KIE to generate audio.
return_last_frame (BOOLEAN, optional): asks KIE to include a last-frame artifact when supported.
aspect_ratio (COMBO, optional): 16:9, 9:16, 1:1.
resolution (COMBO, optional): 480p, 720p, 1080p.
duration (COMBO, optional): 5, 10, 15.
web_search (BOOLEAN, optional): forwards KIE's web-search toggle.
seedance_data (KIE_SEEDANCE2_REQUEST, optional): validated payload from preflight. When connected, this overrides direct field inputs.
log (BOOLEAN, optional): enable helper logging.

Text-to-video: Connect no media inputs.
First-frame image-to-video: Connect first_frame only.
First+last-frame image-to-video: Connect first_frame and last_frame.
Multimodal reference-to-video: Connect any mix of reference_images, reference_video, and reference_audio.
Hybrid control mode: You can combine first_frame and last_frame with reference media in the same request.
last_frame still requires first_frame.

The current aspect_ratio, resolution, and duration option lists are pinned to the public KIE examples used for this implementation pass. Widen them only after Windows-side live API verification confirms the accepted enum set.
Preflight now reports the exact payload fields present plus inferred alias order such as @Image1, @Video1, and @Audio1. Those aliases are treated as a likely model convention based on upload order, not a verified API contract.
The official KIE docs currently show a typo with reference_video_urls including a trailing space in the example payload. This node normalizes that field when consuming prebuilt payloads.
KIE's public marketing copy mentions optional lens locking, but the visible request example does not expose a verified request field for it yet. This first pass intentionally leaves that transport field out rather than guessing.
The official Seedance 2.0 Fast page is currently inconsistent and still shows model: "bytedance/seedance-2". This node intentionally targets only the verified non-fast model for now.
If KIE returns multiple artifacts, the node selects the video URL and ignores extra artifacts in the ComfyUI output contract.