# H3 Max Turbo Extend Video

> Run H3 Max Turbo Extend Video by falai online or via API. From $0.025 per second, no setup.

**URL:** https://inference.sh/apps/falai/minimax-h3-max-turbo-extend-video
**Last updated:** 2026-10-20

---

Extend an existing video with new prompt-guided footage using MiniMax H3 Max Turbo via fal. 1-15s of continuation, 480P to 2K, optional audio references.

- app: `falai/minimax-h3-max-turbo-extend-video`
- maker: [falai](https://inference.sh/apps/falai.md)
- category: [video](https://inference.sh/apps/category/video.md)
- input → output: video → video
- tasks: [video to video](https://inference.sh/apps/tag/video-to-video.md), [video extension](https://inference.sh/apps/tag/video-extension.md)
- price: $0.025/s 480P, $0.04/s 768P, $0.08/s 1080P, $0.16/s 2K
- runs via: api, javascript and python sdk, belt cli, mcp

## minimax-h3-max-turbo-extend-video API Guide

### About
extend an existing video with new prompt-guided footage using minimax h3 max turbo via fal. 1-15s of continuation, 480p to 2k, optional audio references.

### 1. Calling the API

#### Install the Client

```bash
pip install inferencesh
```

#### Setup Your API Key
Set `INFERENCE_API_KEY` as an environment variable. Get your key from settings → api keys.

```bash
export INFERENCE_API_KEY="inf_your_key"
```

#### Run and Get Result

```python
import os
from inferencesh import inference

client = inference(api_key=os.environ["INFERENCE_API_KEY"])


result = client.run({
        "app": "falai/minimax-h3-max-turbo-extend-video@7qg4jt3n",
        "input": {
            "video": "https://example.com/file.png",
            "prompt": "The camera keeps pushing forward as the fog lifts and a lighthouse appears on the cliff."
        }
    })

print(result["output"])
```

#### Stream Live Updates

```python
import os
from inferencesh import inference

client = inference(api_key=os.environ["INFERENCE_API_KEY"])


## stream=True yields updates as they arrive
for update in client.run({
        "app": "falai/minimax-h3-max-turbo-extend-video@7qg4jt3n",
        "input": {
            "video": "https://example.com/file.png",
            "prompt": "The camera keeps pushing forward as the fog lifts and a lighthouse appears on the cliff."
        }
    }, stream=True):
    if update.get("progress"):
        print(f"progress: {update['progress']}%")
    if update.get("output"):
        print(f"output: {update['output']}")
```

### 2. Authentication
The API uses API keys for authentication. See the authentication docs for detailed setup instructions.

### 3. Files

#### Automatic Upload

```python
## local file paths are automatically uploaded
result = client.run({
    "app": "falai/minimax-h3-max-turbo-extend-video@7qg4jt3n",
    "input": {
        "image": "/path/to/local/image.png",  # detected & uploaded
        "audio": "https://example.com/audio.mp3",  # url passed through
    }
})
```

#### Manual Upload

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

### 4. Schema

#### Input
- **video** (string) *required*: Video to extend. 1.625s to 60s, up to 50 MB, aspect ratio between 0.4 and 2.5.
- **prompt** (string) *required*: What happens next. Describe the continuation, not the source.
- **duration** (number): Seconds of new footage to add (1-15).
- **output** (string): extended: source plus new footage as one video. continuation: only the new clip, with a 1.625s repeat of the source ending.
- **resolution** (string): Output resolution.
- **aspect_ratio** (string): auto follows the source; other values crop to fit.
- **reference_audios** (array): Audio references guiding the new audio (2-15s each, 15s combined). The source soundtrack is kept.
- **enable_prompt_expansion** (boolean): Enhance the prompt using the source video for a consistent continuation.
- **seed** (integer): Random seed for reproducible generation.

#### Output
- **duration** (number): Seconds of returned video.
- **expanded_prompt** (string): The prompt used after expansion.
- **seed** (integer): Seed used for the continuation.
- **video** (string): The extended video, or the continuation clip.

## other video apps

- [H3 Max Styles](https://inference.sh/apps/falai/minimax-h3-max-styles.md): $0.08/sec (768P)
- [H3 Max Insert Video](https://inference.sh/apps/falai/minimax-h3-max-insert-video.md): $0.05/sec 480p, $0.06/sec 768p
- [H3 Max 3D to Video](https://inference.sh/apps/falai/minimax-h3-max-3d-to-video.md): $0.50/request + $0.05/sec (480P), $0.08/sec (768P), $0.16/sec (1080P) + $0.10/generated ref; 5s min
- [H3 Max Recast](https://inference.sh/apps/falai/minimax-h3-max-recast.md): $0.30/sec at 768P, $0.45/sec at 1080P
- [H3 Max Relight](https://inference.sh/apps/falai/minimax-h3-max-relight.md): $0.05/s 480P, $0.08/s 768P, $0.16/s 1080P, $0.32/s 2K; up to 15s/video

## faq

### how much does H3 Max Turbo Extend Video cost?

$0.025/s 480P, $0.04/s 768P, $0.08/s 1080P, $0.16/s 2K. you pay per run from your inference shell credits. no subscription is required.

### how do I run H3 Max Turbo Extend Video via api?

call falai/minimax-h3-max-turbo-extend-video with the javascript or python sdk, the rest api, or `belt app run falai/minimax-h3-max-turbo-extend-video` from a terminal. the api reference on this page lists every input.

### who makes H3 Max Turbo Extend Video?

H3 Max Turbo Extend Video is made by falai and runs on inference shell. every falai app is listed at https://inference.sh/apps/falai.

### can my agent use H3 Max Turbo Extend Video?

yes. agents call it as a tool through the inference shell mcp server (https://api.inference.sh/mcp), the belt cli or the sdk, and pay per run like you do.

### what are the alternatives to H3 Max Turbo Extend Video?

other video apps on inference shell include H3 Max Styles, H3 Max Insert Video, H3 Max 3D to Video, H3 Max Recast. they run through the same api, so switching is a one-line change.