The Seedance1.0 Pro: Start End to Video workflow is designed to create seamless cinematic video transitions between two static frames. By leveraging ByteDance's Seedance model, this workflow ensures fluid motion and scene consistency, providing a professional finish to your video projects. The core of this workflow involves the ByteDanceFirstLastFrameNode, which intelligently interpolates frames to generate smooth transitions. This is particularly useful for creators looking to enhance their video content with sophisticated visual effects without extensive manual editing. The workflow also includes nodes such as LoadImage for importing the start and end frames, and SaveVideo for exporting the final video, making it a comprehensive solution for video transition tasks.
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/46fc617ad144.jsonFetching 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 "Seedance1.0 Pro: Start End to Video" (Python)
from comfy_sdk import Comfy
client = Comfy(api_key="comfyui-...")
# This workflow, exported in API format (see note below)
wf = client.workflows.from_file("api_bytedance_flf2v_api.json")
asset = client.assets.from_file("input.png")
wf.set_input("35", "image", asset) # LoadImage
job = client.run(wf)
for output in job.get_outputs("37"): # SaveVideo
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
