Inference Logoinference.sh
apps/klingai/video-v3

video-v3

Kling V3.0 - latest and most capable video generation model. Native 4K output, multi-shot generation, flexible 3-15s duration billed per second, element control, motion control, and synchronized audio.

run with your agent
# install belt
$curl -fsSL https://cli.inference.sh | sh
# view schema & details
$belt app get klingai/video-v3
# run
$belt app run klingai/video-v3

api reference

about

kling v3.0 - latest and most capable video generation model. native 4k output, multi-shot generation, flexible 3-15s duration billed per second, element control, motion control, and synchronized audio.

1. calling the api

install the client

the client provides a convenient way to interact with the api.

bash
1pip install inferencesh

setup your api key

set INFERENCE_API_KEY as an environment variable. get your key from settings → api keys.

bash
1export INFERENCE_API_KEY="inf_your_key"

run and get result

submit a request and wait for the final result. best for batch processing or when you don't need progress updates.

python
1from inferencesh import inference23client = inference()456result = client.run({7        "app": "klingai/video-v3",8        "input": {}9    })1011print(result["output"])

stream live updates

get real-time progress updates as the task runs. ideal for showing progress bars, partial results, or long-running tasks.

python
1from inferencesh import inference23client = inference()456# stream=True yields updates as they arrive7for update in client.run({8        "app": "klingai/video-v3",9        "input": {}10    }, stream=True):11    if update.get("progress"):12        print(f"progress: {update['progress']}%")13    if update.get("output"):14        print(f"output: {update['output']}")

2. authentication

the api uses api keys for authentication. see the authentication docs for detailed setup instructions.

3. files

file inputs are automatically handled by the sdk. you can pass local paths, urls, or base64 data.

automatic upload

the python sdk automatically detects local file paths and uploads them. urls are passed through as-is.

python
1# local file paths are automatically uploaded2result = client.run({3    "app": "klingai/video-v3",4    "input": {5        "image": "/path/to/local/image.png",  # detected & uploaded6        "audio": "https://example.com/audio.mp3",  # url passed through7    }8})

manual upload

you can also upload files manually and use the returned url.

python
1# upload and get a hosted URL2file = client.files.upload("/path/to/file.png")3print(file.uri)  # https://cloud.inference.sh/...

4. webhooks

get notified when a task completes by providing a webhook url. when the task reaches a terminal state (completed, failed, or cancelled), a POST request is sent to your url with the task result.

python
1result = client.run({2    "app": "klingai/video-v3",3    "input": {},4    "webhook": "https://your-server.com/webhook"5}, wait=False)

webhook payload

your endpoint receives a JSON POST with the task result:

json
1{2  "id": "task_abc123",3  "status": 9,4  "output": { ... },5  "error": "",6  "session_id": null,7  "created_at": "2024-01-15T10:30:00Z",8  "updated_at": "2024-01-15T10:30:05Z"9}
idstringtask id
statusnumberterminal status (9=completed, 10=failed, 11=cancelled)
outputobjecttask output (when completed)
errorstringerror message (when failed)
session_idstringsession id (if using sessions)
created_atstringiso timestamp
updated_atstringiso timestamp

5. schema

input

promptstring*

text prompt describing the video content. max 2500 chars.

example: "A cinematic drone shot sweeping over a coastal city at golden hour, waves crashing against the harbor"
imagestring(file)

start frame image for image-to-video. formats: jpg, jpeg, png. max 10mb, min 300px.

end_imagestring(file)

end frame image. requires image to be set as start frame.

modestring

generation mode. 'pro' for higher quality, 'std' for faster/cheaper.

default: "pro"
options:"std""pro"
soundboolean

generate synchronized audio with the video.

default: true
aspect_ratiostring

video aspect ratio.

default: "16:9"
options:"16:9""9:16""1:1""4:3""3:4""3:2""2:3""21:9"
durationinteger

video duration in seconds (3-15). billed per second.

default: 5min:3max:15
negative_promptstring

what to avoid in the video. max 2500 chars.

output

videostring(file)*

the generated video file.

output_metaobject

structured metadata about inputs/outputs for pricing calculation

ready to run video-v3?

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