What image size and aspect ratio should I use?

Use clean, well-lit images around 768–1080 px on the long edge for a good quality/speed balance. Keep your desired aspect ratio; the node will resize if needed, but larger inputs require more VRAM and time.

My video looks jittery or warps the subject. How can I improve it?

Lower the motion strength, shorten the duration, and increase fps if possible. Start with simpler, subject-centered images and try a different seed for stability. Reducing background clutter also helps.

How do I control clip length precisely?

Set duration (in seconds or frames) in ByteDance2FirstLastFrameNode and match that fps in SaveVideo. Duration = frames ÷ fps, so verify both to get the exact length you expect.

Can I make a seamless loop?

Seamless loops aren’t guaranteed, but the node’s first/last frame consistency can help. Keep motion subtle and cyclical, aim for similar start/end framing, and if needed, trim or crossfade the ends in an external editor.

Seedance 2.0 Image to Video - ComfyUI Workflow

Seedance 2.0 Image to Video turns a single still image into a short, natural-looking video. The workflow is intentionally minimal: LoadImage brings your source photo or artwork into the graph, ByteDance2FirstLastFrameNode (powered by Seedance 2.0) synthesizes motion and generates a sequence of frames, and SaveVideo encodes the result as a playable clip. It’s a fast, focused way to create 4–15 second motion from a static image without extra conditioning or complex control nodes.

Technically, ByteDance2FirstLastFrameNode uses Seedance 2.0 to infer a coherent motion arc anchored by consistent first and last frames, then interpolates the in-betweens to preserve subject structure and style. You control core parameters such as clip length (seconds or frames), frames-per-second, motion intensity, and (if exposed by your version) a seed for repeatability. The node outputs a frame sequence that SaveVideo compiles into a video at the chosen fps. For best results, start with a clean, well-lit image where the main subject is centered, keep motion strength moderate, and target 6–10 seconds for the most natural movement.

API

Use this workflow from code

Every Comfy workflow is a JSON graph. The payload below is this workflow, exactly as ComfyUI runs it — fetch it from the URL, keep it in version control, or load it in ComfyUI and run it node by node.

GET https://comfy.org/workflows/download/baa06a413558.json

Fetching workflow JSON…

Run it from Python or TypeScript with the Comfy SDK. The same code targets Comfy Cloud or a ComfyUI you host yourself — only the base URL changes.

# Install (beta)
pip install comfy-sdk        # Python
npm i @comfyorg/sdk          # TypeScript

# Run this workflow (Python)
from comfy_sdk import Comfy

client = Comfy(api_key="comfyui-...")
wf = client.workflows.from_file("workflow_api.json")
job = client.run(wf)
for output in job.get_outputs("<output-node-id>"):
    output.to_file(output.name)

The SDK takes a workflow in API format: open this workflow in ComfyUI and use File → Export Workflow (API). API access requires a Comfy Cloud plan with an API key. SDK docs · Get an API key

FAQ

Frequently Asked Questions

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