Runway: First Last Frame 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({
    "9": {
        "class_type": "RunwayFirstLastFrameNode",
        "inputs": {
            "duration": 5,
            "end_frame": [
                "11",
                0
            ],
            "prompt": "wide horizontal pan shot of a girl running across a reflective water surface, behind her vast starry sky with pastel-colored nebula waves swirling, stardust drifting and twinkling stars, cool-to-warm dreamy pastel gradient, soft backlighting by starlight, watercolor and oil painting blend texture, smooth frame-to-frame transitions maintaining continuous nebula motion",
            "ratio": "1280:768",
            "seed": 379330984,
            "start_frame": [
                "10",
                0
            ]
        },
        "_meta": {
            "title": "Runway First-Last-Frame to Video"
        }
    },
    "10": {
        "class_type": "LoadImage",
        "inputs": {
            "image": "UPLOADED_image_2_FILENAME"
        },
        "_meta": {
            "title": "Load Image"
        }
    },
    "11": {
        "class_type": "LoadImage",
        "inputs": {
            "image": "UPLOADED_image_FILENAME"
        },
        "_meta": {
            "title": "Load Image"
        }
    },
    "12": {
        "class_type": "SaveVideo",
        "inputs": {
            "filename_prefix": "video/ComfyUI",
            "format": "auto",
            "format.codec": "auto",
            "video": [
                "9",
                0
            ]
        },
        "_meta": {
            "title": "Save Video"
        }
    }
})
# Replace each example.com URL with a public URL of your file.
workflow.set_input("11", "image", client.assets.from_url("https://example.com/replace-with-a-url/image"))
workflow.set_input("10", "image", client.assets.from_url("https://example.com/replace-with-a-url/image_2"))

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