Runway: Gen4 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": [
                "8",
                0
            ]
        },
        "_meta": {
            "title": "Save Video"
        }
    },
    "8": {
        "class_type": "RunwayImageToVideoNodeGen4",
        "inputs": {
            "duration": 5,
            "prompt": "A man sits alone in a dimly lit room, smoking a cigarette. The smoke slowly fills the space. He suddenly turns his head to look directly at the camera, making clear eye contact. The camera then slowly pushes forward toward his face, ending in a close-up. The mood is cinematic and introspective. Shallow depth of field, dramatic lighting, soft shadows, 24fps film look.\n\n",
            "ratio": "1280:720",
            "seed": 549931386,
            "start_frame": [
                "4",
                0
            ]
        },
        "_meta": {
            "title": "Runway Image to Video (Gen4 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)