# Veo

Source: https://docs.prodia.com/models/veo/

Veo is Google DeepMind's video generation model. Its defining feature is joint audio-visual generation — rather than generating video first and adding sound as a separate step, Veo processes both modalities together using a joint diffusion process. This means generated audio syncs naturally with on-screen actions, with dialogue matching lip movements with under 120ms accuracy.

### Architecture

Veo uses a 3D latent diffusion transformer architecture that goes beyond 2D image generation by adding time as a third dimension. The model uses 3D convolutional layers to process spatiotemporal data across channels, time, height, and width simultaneously, enabling it to extract patterns not just across space but also across time.

The video data is compressed into spatio-temporal patches in the latent space, making generation efficient while maintaining high visual quality. This same architecture powers the audio generation when `generate_audio` is enabled.

### Standard vs Fast mode

Veo is available in two speed tiers:

| Mode       | Generation time | Best for                                         |
| ---------- | --------------- | ------------------------------------------------ |
| *Standard* | \~90 seconds    | Maximum quality, commercial content              |
| *Fast*     | \~60 seconds    | Rapid iteration, previews, high-volume workloads |

Both modes support the same resolution, aspect ratio, and feature set. The quality difference is subtle — start with Fast for prototyping and switch to Standard for final output.

### What sets Veo apart

*Joint audio-visual generation:*
Enable `generate_audio: true` to produce a synchronized audio track alongside the video. The model generates audio that matches on-screen actions — footsteps sync with walking, dialogue matches lip movements, ambient sounds match the environment. This eliminates the need for a separate audio generation or foley step.

*Negative prompts:*
Veo supports `negative_prompt` to exclude specific content from generation. This is useful for avoiding common artifacts: `"low quality, blurry, distorted faces, watermark"`.

*Last-frame control (img2vid):*
For image-to-video generation, you can provide both a starting image and a target last frame. The model generates a smooth transition between the two, useful for morphing effects and controlled scene transitions.

*Person generation policy:*
The `person_generation` parameter lets you explicitly allow or disallow the generation of people, giving you control over content policy compliance.

### When to use Veo

- *Video with sound* — the only model on Prodia with integrated audio generation
- *Landscape and nature content* — excels at sweeping shots, atmospheric scenes, and environmental video
- *Social media video* — 16:9 and 9:16 aspect ratios cover YouTube, TikTok, and Instagram
- *Talking-head content* — joint audio-visual diffusion produces natural lip sync

For longer videos (up to 15s), more aspect ratios, or video continuation, consider [Wan 2.7](https://docs.prodia.com/models/wan-2-7/). For fast generation at lower cost, [Wan 2.2 Lightning](https://docs.prodia.com/models/wan-2-2/) generates in \~22s. For precise camera control, [Kling](https://docs.prodia.com/models/kling/) offers programmatic camera movements.

### Job types

| Job type                        | Description                    | ETA   |
| ------------------------------- | ------------------------------ | ----- |
| `inference.veo.txt2vid.v2`      | Generate a video from text     | \~90s |
| `inference.veo.img2vid.v2`      | Generate a video from an image | \~90s |
| `inference.veo.fast.txt2vid.v2` | Fast text-to-video generation  | \~60s |
| `inference.veo.fast.img2vid.v2` | Fast image-to-video generation | \~60s |

> note:
>
> All Veo job types support async processing. See the [async reference](https://docs.prodia.com/reference/async/) for polling-based workflows.

### Parameters

*Common to all:*

- `prompt` (required) — text description, up to 2,500 characters
- `negative_prompt` — content to exclude, up to 2,500 characters
- `resolution` — `720p` (default) or `1080p`
- `aspect_ratio` — `16:9` (default) or `9:16`
- `duration_seconds` — `4`, `6`, or `8` (default)
- `generate_audio` — set to `true` to generate a synchronized audio track (default: false)
- `person_generation` — `allow_adult` (default) or `dont_allow`
- `seed` — integer for reproducible results

*Image-to-video only:*

- `image` — input image filename to use as the first frame
- `last_frame` — optional target last-frame image for controlled transitions

### Prompting tips

- *Describe the soundscape:* when using `generate_audio`, include audio cues in your prompt — "birds chirping in a forest", "footsteps echoing in a hallway", "crowd cheering in a stadium"
- *Cinematic language works well:* terms like "tracking shot", "slow motion", "dolly zoom", "aerial view" produce expected camera behaviors
- *Use negative prompts:* adding `"low quality, blurry, distorted, watermark"` as a negative prompt consistently improves output
- *Match aspect ratio to platform:* `16:9` for YouTube/landscape, `9:16` for TikTok/Reels/Shorts

### Examples

Text-to-video with audio:

```json
{
  "type": "inference.veo.fast.txt2vid.v2",
  "config": {
    "prompt": "A sweeping mountain landscape at sunrise, mist rolling through valleys, birds flying overhead, cinematic HDR",
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "duration_seconds": 8,
    "generate_audio": true,
    "negative_prompt": "low quality, blurry, watermark"
  }
}
```

Image-to-video with last-frame control:

```json
{
  "type": "inference.veo.img2vid.v2",
  "config": {
    "prompt": "Smooth transition from day to night, lights gradually turning on",
    "image": "daytime-city.jpg",
    "last_frame": "nighttime-city.jpg",
    "resolution": "1080p",
    "aspect_ratio": "16:9",
    "duration_seconds": 6
  }
}
```

### Guides

[Generating Videos](https://docs.prodia.com/guides/generating-videos/) — Step-by-step guide for generating videos with Prodia, including text-to-video and image-to-video examples.