Kling 3.0: 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({
    "1": {
        "class_type": "LoadImage",
        "inputs": {
            "image": "goldenfish_in_bag.png"
        },
        "_meta": {
            "title": "Load Image"
        }
    },
    "2": {
        "class_type": "SaveVideo",
        "inputs": {
            "filename_prefix": "video/Kling_v3_flf2v",
            "format": "auto",
            "format.codec": "auto",
            "video": [
                "12",
                0
            ]
        },
        "_meta": {
            "title": "Save Video"
        }
    },
    "12": {
        "class_type": "KlingFirstLastFrameNode",
        "inputs": {
            "duration": 5,
            "end_frame": [
                "13",
                0
            ],
            "first_frame": [
                "1",
                0
            ],
            "generate_audio": True,
            "model": "kling-v3",
            "model.resolution": "720p",
            "prompt": "A single continuous shot, about 5 seconds long. Start from a close-up of a transparent plastic bag full of bright orange goldfish, floating against a dark, softly lit background. In slow motion, the plastic bag gently dissolves and breaks apart, the water slowly drifting into the air instead of falling. The goldfish gracefully swim out of the disintegrating bag and begin to float weightlessly through the air, their scales catching warm, soft light. The camera smoothly glides forward with the fish as they drift toward a young man standing in the darkness. Without cutting, the shot continues as the goldfish gather around his head and shoulders, slowly orbiting his head like a glowing halo, ending on a portrait-like framing similar to the second reference image. Sound design: soft ambient music, subtle underwater-style whooshes, light water and bubble textures, no voices or dialogue",
            "seed": 0
        },
        "_meta": {
            "title": "Kling 3.0 First-Last-Frame to Video"
        }
    },
    "13": {
        "class_type": "LoadImage",
        "inputs": {
            "image": "man_in_daydream.png"
        },
        "_meta": {
            "title": "Load Image"
        }
    }
})

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