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.
Run it from TypeScript or Python with the Comfy SDK. The same code targets Comfy Cloud or a ComfyUI you host yourself — only the base URL changes.
// Install (beta)
npm i @comfyorg/sdk
// Run "Seedance1.0 Pro: Start End to Video" (TypeScript)
import { Comfy } from "@comfyorg/sdk";
const client = new Comfy({ apiKey: "comfyui-..." });
// This workflow, exported in API format (see note below)
const wf = await client.workflows.fromFile("api_bytedance_flf2v_api.json");
const asset = client.assets.fromFile("input.png");
wf.setInput("35", "image", asset); // LoadImage
const job = await client.run(wf);
await job.getOutputs("37")[0].toFile("output.png"); // SaveVideoThe SDK takes a workflow in API format: open this workflow in ComfyUI and use File → Export Workflow (API).
Comfy Cloud API access requires a plan with an API key.
FAQ
