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Documentation Index

Fetch the complete documentation index at: https://runcrate.ai/docs/llms.txt

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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.

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Available models

ModelAudioSpeedBest for
Veo 3.0 AudioAuto-generatedMediumVideos with sound
Veo 3.0 Fast AudioAuto-generatedFastQuick drafts with sound
Veo 2.0NoneMediumSilent video, lower cost

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Video with audio

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}..."),
)
All examples below use the same client from above.

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Fast audio drafts

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}..."),
)

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Silent video (Veo 2)

When adding your own audio in post-production: 
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}..."),
)

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Audio prompting

Be explicit about sounds in your prompt: 
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.

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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.