Runway: Gen3a Turbo Image to Video

# Python 3.10+: pip install comfy-sdk==0.4.0
import os

from comfy_sdk import Comfy

api_key = os.environ.get("COMFY_API_KEY", "").strip()
if not api_key: raise RuntimeError("Set COMFY_API_KEY")
os.environ.setdefault("COMFY_BASE_URL", "https://cloud.comfy.org")
client = Comfy(api_key=api_key)
workflow = client.workflows.from_json({
    "4": {
        "class_type": "LoadImage",
        "inputs": {
            "image": "UPLOADED_image_FILENAME"
        },
        "_meta": {
            "title": "Load Image"
        }
    },
    "6": {
        "class_type": "SaveVideo",
        "inputs": {
            "filename_prefix": "video/ComfyUI",
            "format": "auto",
            "format.codec": "auto",
            "video": [
                "7",
                0
            ]
        },
        "_meta": {
            "title": "Save Video"
        }
    },
    "7": {
        "class_type": "RunwayImageToVideoNodeGen3a",
        "inputs": {
            "duration": 5,
            "prompt": "Steampunk girl on flying airship deck, wind blowing her hair and dress. She shifts her stance and raises a brass telescope to her eye. Skirt and gear accessories flutter dynamically. A giant gear-decorated airship glides behind her through the sky, partially obscured by clouds.  Steam rises in the distance. Smooth cinematic dolly-in with slight orbit. Warm golden light, dreamy steampunk mood. High detail, stable animation, no flicker.",
            "ratio": "1280:768",
            "seed": 513022171,
            "start_frame": [
                "4",
                0
            ]
        },
        "_meta": {
            "title": "Runway Image to Video (Gen3a Turbo)"
        }
    }
})
# Replace each example.com URL with a public URL of your file.
workflow.set_input("4", "image", client.assets.from_url("https://example.com/replace-with-a-url/image"))

# run() also passes api_key to the partner nodes in this workflow.
job = client.run(workflow, api_key=api_key)