This ComfyUI tutorial workflow turns a single still image into a short video with synchronized, auto-generated audio using the MiniMax H3 family via the FastVideo FastH3 8-Step V2 checkpoint. The pipeline is simple and fast: LoadImage reads your source, ImageScaleToTotalPixels (assisted by GetImageSize) rescales it to a GPU-friendly pixel budget while preserving aspect ratio, and the MiniMaxH3ImageToVideo node (id: 4c314f31-ecda-4b08-ae98-faaba1bf613f) renders both video frames and a native audio track in one pass. SaveVideo then writes an MP4 output that includes the model’s audio when available.
FastH3 8-Step V2 is a DMD2-distilled variant of MiniMax H3 that cuts inference to just 8 sampling steps, delivering much faster turnaround than the base model while maintaining audio/video synchronization. The workflow uses the minimax_h3_video_vae_fp16.safetensors VAE and the FastVideo/FastVideo-FastH3-8-Step-V2 checkpoint, giving you a practical, single-image-to-video path that’s ideal for animating portraits, product shots, and quick social clips without extra audio post-processing.
API
Use este workflow a partir do código
Todo workflow Comfy é um grafo JSON. O payload abaixo é este workflow, exatamente como o ComfyUI executa — obtenha-o pela URL, mantenha-o no controle de versão ou carregue-o no ComfyUI e execute nó por nó.
Execute a partir de TypeScript ou Python com o Comfy SDK. O mesmo código serve para o Comfy Cloud ou um ComfyUI hospedado por você — apenas a URL base muda.
// Install (beta)
npm i @comfyorg/sdk
// Run this workflow (TypeScript)
import { Comfy } from "@comfyorg/sdk";
const client = new Comfy({ apiKey: "comfyui-..." });
const wf = await client.workflows.fromFile("workflow_api.json");
const job = await client.run(wf);
await job.getOutputs("<output-node-id>")[0].toFile("output.png");O SDK utiliza um workflow no formato API: abra este workflow no ComfyUI e use Arquivo → Exportar Workflow (API).
O acesso à API do Comfy Cloud requer um plano com chave de API.
