seedance

This is the node that puts ByteDance's Seedance video engine inside your ComfyUI graph - and unlike most of what you run in ComfyUI, none of it happens on your machine. Seedance is closed and API-only (that's ByteDance's whole posture: the products stay on the API, only the components go open). This civitai-comfy-nodes recipe node submits your job to Civitai's Orchestration API, waits, and hands the finished clip back as a native VIDEO socket. Billed in Buzz.

Of all the video nodes in this pack, Seedance is the most feature-complete out of the box. It's the one you reach for when you want real choices - resolution, duration, aspect ratio, audio, even reference inputs - without fighting a dozen fiddly knobs.

The inputs that matter

Three are required, and they're the core of the recipe:

• prompt - the usual multiline prompt.
• aspect_ratio - seven options including 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, and adaptive (which matches your input image's ratio - great for image-to-video).
• duration - 4 to 15 seconds, the longest range of any node in this pack.
• resolution - 480p, 720p, or 1080p.

Then the optional stack, where the interesting stuff lives:

• model - v2, v2-fast, or v2-mini on top of the empty default. v2-fast trades a little quality for a shorter queue and smaller bill; v2-mini is the cheap draft tier.
• generate_audio (default on) - Seedance can synthesize audio alongside the video. If you don't want it, flip it off and save the Buzz; if you do, this is one of the few cloud video engines here that handles sound natively.
• images - wire a LoadImage in for image-to-video. This is the input that does the most for your output quality: anchoring the first frame to a known image fixes the consistency problems that plague pure text-to-video.
• reference_videos_json and reference_audios_json - JSON text fields for character/subject reference. These are the pack's "freeform structures stay JSON" inputs from the README, so you pass an array of URLs. Invalid JSON fails fast with a clear local error telling you exactly what's malformed.
• seed - set it to lock a result, or leave at 0.
• api_config - auth.

Outputs

The standard pack trio: video (VIDEO) into a Save Video / preview node, workflow_id (STRING) for tracking in the Civitai sidebar, raw_json (STRING) to inspect the response - including what each run billed in Buzz.

Install and auth

One-time, pack-wide setup. ComfyUI Manager → Custom Nodes Manager → search Civitai Comfy Nodes → install, restart. Or from the shell:

cd ComfyUI/custom_nodes
git clone https://github.com/civitai/civitai-comfy-nodes.git
pip install -r civitai-comfy-nodes/requirements.txt   # just `requests`

Auth: wire a Civitai Auth node, set CIVITAI_API_TOKEN, or sign in via the sidebar. Headless boxes should use the env var.

Common issues

• Cost is per-second and it adds up. The community's honest reaction to Seedance-in-ComfyUI was sticker shock - video jobs are where a cloud session gets expensive fast. Check raw_json after a run to see the meter before you chain ten of these together.
• Slow at launch. The pack shipped June 2026, right as Civitai's datacenter lost GPU capacity to crypto mining; long queues and the occasional timeout were the top real-world complaints. The default timeout is 30 minutes - raise it via the Civitai Auth node if long jobs keep dying.
• Same filter as the web generator. ByteDance's content moderation applies at the model, not the node. There's no local bypass.
• Reference inputs must be valid JSON. If you get a "not valid JSON" error from reference_videos_json, it's a bracket or quote problem in your text field, not a network failure.

It's not the budget option in this pack - MiniMax or Mochi are cheaper per clip - but Seedance is the closest thing here to an all-rounder: I2V, audio, long durations, and a real resolution ladder.