Inference Logoinference shell

PixVerse Extend

PixVerse Extend — extend an existing video with AI-generated continuation. Supports 5s or 8s extensions at up to 1080p.

video extension
run in browser →run via API
run with your agent
# install belt
$curl -fsSL https://cli.inference.sh | sh
# sign in (or set INFERENCE_API_KEY on a headless machine)
$belt login
# view schema & details
$belt app get pixverse/extend
# run
$belt app run pixverse/extend --input '{"video":"https://example.com/file.png","prompt":"prompt"}'
maker
pixverse
category
video
price
$0.025–$0.115/video (360p–1080p, no audio/audio)
runs via
api, javascript and python sdk, belt cli, mcp
updated
2026-08-04

api reference

about

pixverse extend — extend an existing video with ai-generated continuation. supports 5s or 8s extensions at up to 1080p.

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
1import os2from inferencesh import inference34client = inference(api_key=os.environ["INFERENCE_API_KEY"])567result = client.run({8        "app": "pixverse/extend",9        "input": {10            "video": "https://example.com/file.png",11            "prompt": "prompt"12        }13    })1415print(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
1import os2from inferencesh import inference34client = inference(api_key=os.environ["INFERENCE_API_KEY"])567# stream=True yields updates as they arrive8for update in client.run({9        "app": "pixverse/extend",10        "input": {11            "video": "https://example.com/file.png",12            "prompt": "prompt"13        }14    }, stream=True):15    if update.get("progress"):16        print(f"progress: {update['progress']}%")17    if update.get("output"):18        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": "pixverse/extend",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": "pixverse/extend",3    "input": {4        "video": "https://example.com/file.png",5        "prompt": "prompt"6    },7    "webhook": "https://your-server.com/webhook"8}, wait=False)

webhook payload

your endpoint receives a JSON POST with the task result:

json
1{2  "event": "task.completed",3  "timestamp": "2024-01-15T10:30:05Z",4  "data": {5    "id": "task_abc123",6    "short_id": "abc123",7    "status": 10,8    "status_text": "completed",9    "output": { ... },10    "created_at": "2024-01-15T10:30:00Z",11    "updated_at": "2024-01-15T10:30:05Z"12  }13}
eventstringtask.completed, task.failed or task.cancelled
timestampstringiso timestamp of the delivery
data.idstringtask id
data.short_idstringshort task id
data.statusnumberterminal status (10=completed, 11=failed, 12=cancelled, 13=rejected)
data.status_textstringthe status as a word: completed, failed or cancelled
data.outputobjecttask output (when completed)
data.errorstringerror message (when failed, omitted otherwise)
data.session_idstringsession id (when the task ran in a session, omitted otherwise)
data.created_atstringiso timestamp
data.updated_atstringiso timestamp

5. schema

input

videostring(file)*

source video to extend. mp4/mov, max 50mb, max 1920px, max 30s.

promptstring*

prompt describing what should happen in the extended portion (max 2048 chars)

qualitystring

output resolution

default: "720p"
options:"360p""540p""720p""1080p"
durationinteger

extension duration in seconds. 1080p supports only 5s.

default: 5
options:58
negative_promptstring

what to avoid (max 2048 chars)

seedinteger

seed for reproducibility

min:0max:2147483647
motion_modestring

motion intensity. fast mode only available for 5s, not at 1080p.

default: "normal"
options:"normal""fast"

output

videostring(file)*

extended video file

other video apps

H3 Max Styles

falai/minimax-h3-max-styles

$0.08/sec (768P)

H3 Max Insert Video

falai/minimax-h3-max-insert-video

$0.05/sec 480p, $0.06/sec 768p

H3 Max 3D to Video

falai/minimax-h3-max-3d-to-video

$0.50/request + $0.05/sec (480P), $0.08/sec (768P), $0.16/sec (1080P) + $0.10/generated ref; 5s min

H3 Max Recast

falai/minimax-h3-max-recast

$0.30/sec at 768P, $0.45/sec at 1080P

H3 Max Relight

falai/minimax-h3-max-relight

$0.05/s 480P, $0.08/s 768P, $0.16/s 1080P, $0.32/s 2K; up to 15s/video

more from pixverse

PixVerse Modify

pixverse/modify

$0.04/sec (360p), $0.05/sec (540p), $0.06/sec (720p)

PixVerse Avatar

pixverse/avatar

$0.025–$0.10/sec (360p–1080p), ~$1.80/24sec 720p

PixVerse Lip Sync

pixverse/lip-sync

$0.02/sec (external audio), $0.02/15 bytes (TTS)

PixVerse Fusion

pixverse/fusion

$0.12/sec

new models

  1. H3 Max Styles

    falai/minimax-h3-max-styles

    video$0.08/sec (768P)

  2. H3 Max Insert Video

    falai/minimax-h3-max-insert-video

    video$0.05/sec 480p, $0.06/sec 768p

  3. H3 Max 3D to Video

    falai/minimax-h3-max-3d-to-video

    video$0.50/request + $0.05/sec (480P), $0.08/sec (768P), $0.16/sec (1080P) + $0.10/generated ref; 5s min

  4. H3 Max Recast

    falai/minimax-h3-max-recast

    video$0.30/sec at 768P, $0.45/sec at 1080P

  5. H3 Max Relight

    falai/minimax-h3-max-relight

    video$0.05/s 480P, $0.08/s 768P, $0.16/s 1080P, $0.32/s 2K; up to 15s/video

ready to run PixVerse Extend?

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