This ComfyUI workflow is designed to seamlessly blend two video sequences using a crossfade transition. The workflow utilizes the 'FL_VideoCrossfade' node to achieve a smooth transition between two sets of image sequences, which are inputs representing video frames. The 'VHS_LoadVideo' nodes are used to load the image sequences for each video, while the 'VHS_VideoInfo' node provides essential metadata about the video sequences, such as frame rate and resolution. The 'VHS_VideoCombine' node then merges the processed sequences into a single output video. This technique is particularly useful for video editors looking to create professional transitions between scenes without noticeable cuts. By defining parameters such as the transition length and blend mode, users can customize the crossfade effect to suit their specific needs. This workflow is versatile and can be applied to various video editing projects, enhancing the visual flow and coherence of the final video product.
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/dc6e967c7e73.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 "Blend Video Sequences With Crossfade Transition" (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("templates_purz_crossfade_api.json")
job = client.run(wf)
for output in job.get_outputs("6"): # VHS_VideoCombine
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
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