This workflow performs reference-based video-to-video editing with LTX 2.3, steered by the Union Control IC LoRA and canny edge guidance. You supply a single edited frame from your clip (for example, painting a red shirt onto a boxer), and the pipeline propagates that visual change to every frame in the video while preserving motion and structure. The core processing happens in the custom processing block (UUID: 9278a6c3-b46a-4e21-8d09-5103f85ffec6), which runs LTX 2.3 inference with the Union Control IC LoRA and integrates canny control to keep edges and silhouettes consistent across time.
Technically, LoadVideo ingests your source clip and feeds frames into the inference block, where canny edge maps are used as a structural prior so the subject’s pose and scene layout remain stable. LoadImage brings in your manually edited reference frame, which the IC LoRA uses as an appearance guide to replicate the change throughout the sequence. After processing, VHS_VideoCombine assembles the generated frames back into a video, and SaveVideo writes the final output to disk. This approach is ideal when you want targeted, consistent replacements—like color swaps, wardrobe fixes, or logo/graphic updates—without re-shoots or heavy roto work.
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/12c2481d04b4.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 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
