> ## Documentation Index
> Fetch the complete documentation index at: https://runcrate.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Google Veo 3 Video API
> Generate AI videos with synchronized audio using Google Veo 3. Text-to-video with automatic sound design through a single API.
export const RuncrateStyles = () => {
if (typeof document !== 'undefined' && !document.getElementById('runcrate-overrides')) {
const s = document.createElement('style');
s.id = 'runcrate-overrides';
s.textContent = `
/* Match Runcrate's rounding scale (--radius: 0.75rem) */
.rounded-sm { border-radius: 0.5rem !important; } /* 8px */
.rounded-md { border-radius: 0.625rem !important; } /* 10px */
.rounded-lg { border-radius: 0.75rem !important; } /* 12px */
.rounded-l-sm { border-top-left-radius: 0.5rem !important; border-bottom-left-radius: 0.5rem !important; }
.rounded-r-sm { border-top-right-radius: 0.5rem !important; border-bottom-right-radius: 0.5rem !important; }
.rounded-l-md { border-top-left-radius: 0.625rem !important; border-bottom-left-radius: 0.625rem !important; }
.rounded-r-md { border-top-right-radius: 0.625rem !important; border-bottom-right-radius: 0.625rem !important; }
.rounded-l-lg { border-top-left-radius: 0.75rem !important; border-bottom-left-radius: 0.75rem !important; }
.rounded-r-lg { border-top-right-radius: 0.75rem !important; border-bottom-right-radius: 0.75rem !important; }
/* Cards: never pure white in light mode */
.card { background-color: #fcfcfc !important; border-radius: 0.75rem !important; }
html.dark .card { background-color: #141414 !important; }
/* Docs hero box */
.rc-hero { background-color: #fcfcfc; border: 1px solid #e0e0e0; }
html.dark .rc-hero { background-color: #141414; border-color: #242424; }
html.dark .rc-hero h1 { color: #f5f5f5; }
/* Runcrate scrollbar — thin, transparent track, hide-until-hover thumb */
::-webkit-scrollbar { width: 6px; height: 6px; background-color: transparent; }
::-webkit-scrollbar-track { background-color: transparent; }
::-webkit-scrollbar-thumb { background-color: rgba(155, 155, 155, 0.5); border-radius: 10px; transition: opacity 0.3s ease; opacity: 0; }
::-webkit-scrollbar-thumb:hover { background-color: rgba(155, 155, 155, 0.7); }
*:hover::-webkit-scrollbar-thumb,
*:focus::-webkit-scrollbar-thumb,
*:active::-webkit-scrollbar-thumb { opacity: 1; }
* { scrollbar-width: thin; scrollbar-color: rgba(155, 155, 155, 0.5) transparent; }
`;
document.head.appendChild(s);
}
return null;
};
Veo 3 generates video with synchronized audio in a single pass. Ambient sounds, dialogue, and effects are inferred from your prompt — no separate audio pipeline.
## Available models
| Model | Audio | Speed | Best for |
| ---------------------- | -------------- | ------ | ------------------------ |
| **Veo 3.0 Audio** | Auto-generated | Medium | Videos with sound |
| **Veo 3.0 Fast Audio** | Auto-generated | Fast | Quick drafts with sound |
| **Veo 2.0** | None | Medium | Silent video, lower cost |
***
## Video with audio
```python Python theme={"theme":"github-dark"}
from runcrate import Runcrate
client = Runcrate(api_key="rc_live_YOUR_API_KEY")
job = client.models.generate_video_and_save(
"cafe-scene.mp4",
model="google/veo-3.0-audio",
prompt="Barista pouring latte art, espresso machine hissing, cups clinking, ambient cafe chatter",
duration=6,
on_status=lambda j: print(f" {j.status}..."),
)
```
```typescript TypeScript theme={"theme":"github-dark"}
import Runcrate from '@runcrate/sdk';
const rc = new Runcrate({ apiKey: 'rc_live_YOUR_API_KEY' });
const job = await rc.models.generateVideo({
model: 'google/veo-3.0-audio',
prompt: 'Barista pouring latte art, espresso machine hissing, cups clinking',
duration: 6,
});
let status = job;
while (status.status !== 'completed' && status.status !== 'failed') {
await new Promise(r => setTimeout(r, 5000));
status = await rc.models.getVideoStatus(job.id);
}
await Bun.write('cafe-scene.mp4', await rc.models.downloadVideo(job.id));
```
```bash curl theme={"theme":"github-dark"}
curl https://api.runcrate.ai/v1/videos \
-H "Authorization: Bearer rc_live_YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "google/veo-3.0-audio", "prompt": "Barista pouring latte art, espresso machine hissing", "duration": 6}'
```
***
All examples below use the same `client` from above.
## Fast audio drafts
```python theme={"theme":"github-dark"}
client.models.generate_video_and_save(
"draft.mp4", model="google/veo-3.0-fast-audio",
prompt="Dog running through autumn leaves, leaves crunching, birds chirping",
duration=4, on_status=lambda j: print(f" {j.status}..."),
)
```
***
## Silent video (Veo 2)
When adding your own audio in post-production:
```python theme={"theme":"github-dark"}
client.models.generate_video_and_save(
"mountains.mp4", model="google/veo-2.0",
prompt="Aerial drone shot through misty mountain peaks at sunrise, cinematic color grading",
duration=8, on_status=lambda j: print(f" {j.status}..."),
)
```
***
## Audio prompting
Be explicit about sounds in your prompt:
```python theme={"theme":"github-dark"}
client.models.generate_video_and_save(
"storm.mp4", model="google/veo-3.0-audio",
prompt="Lightning over a dark ocean, deep rumbling thunder, rain hitting water, wind howling",
duration=8, on_status=lambda j: print(f" {j.status}..."),
)
```
Words like "hissing", "clinking", "rustling", and "crackling" in your prompt help the model generate more accurate audio.
***
## Tips
* **Audio is automatic.** The audio variants produce video with matching sound in one pass.
* **Describe sounds explicitly.** "Rain hitting a window" beats "rainy scene" for audio quality.
* **Veo 2 for silent.** If adding your own music/voiceover, use Veo 2.0 to avoid paying for unused audio.
* **Duration.** All Veo models support 4, 6, and 8 second durations.