How to Use Veo 3.1 to Make Video with Native Sound

Veo 3.1 is Google DeepMind’s video generation model that produces clips with native audio, supports scene extension, and accepts image input to animate a still frame. It is available in Gemini apps, Google Flow, and the Vertex AI API. This guide covers prompts and limits.

Scene extension is the feature that matters most here. You can generate a clip, then continue it, building a sequence longer than a single generation allows. That is new versus early Veo versions.

What is Veo 3.1?

Veo 3.1 is Google’s text-to-video and image-to-video model launched in 2025. It generates clips in resolutions up to 1080p with synchronized audio, and adds camera controls, scene extension and better prompt adherence over Veo 3.

Access routes: Gemini app (for Google AI Pro/Ultra subscribers), Google Flow for a storyboard-style editor, and the Vertex AI API for developers. Pricing on Vertex is per second of generated video.

How do you prompt Veo 3.1 for good results?

Be specific about camera and action, and describe the sound explicitly.

1. Set the camera. Veo 3.1 responds well to named moves: “slow dolly in,” “aerial drone shot,” “handheld tracking.”
2. Describe action in beats. Instead of “a chef cooks,” write “a chef chops onions, then tosses them into a pan.”
3. Spell out audio. State dialogue, ambient sounds and music. Silence the model otherwise fills with generic ambience.
4. Give lighting and film references. “Golden hour, shallow depth of field, 35mm look” steers the output noticeably.

How does scene extension work?

After generating a clip in Flow, you can extend it forward or backward. Each extension adds a few seconds and keeps the subject consistent. In practice, three or four extensions built a coherent 40-second sequence — but drift accumulates, so subtle changes in clothing or lighting creep in.

Use extension for narrative continuity, not for infinitely long shots. Check each segment before chaining the next.

How good is the native audio?

Dialogue is clear and lip-synced in close-up shots. Sound effects land on the right beat, which is more than most competitors manage. Music generation is usable but generic — you will still want a licensed track for anything branded.

The weakness: accents and long spoken lines drift. Keep dialogue to one or two sentences per clip.

Where does Veo 3.1 fall short?

Fast action and crowded scenes degrade — extra limbs and warping appear. Complex text in frame is unreliable. And the flow credits burn fast: iterating to a polished 8-second clip can take several generations.

Who should use it?

Ad agencies, filmmakers doing pre-visualisation, and content teams that need sound-included clips out of the box. If you only need silent B-roll, a cheaper model suffices.

Quick Summary

• Veo 3.1 generates up to 1080p video with native synchronized audio.
• Available in the Gemini app, Google Flow, and Vertex AI API.
• Scene extension chains clips into longer sequences but accumulates visual drift.
• Name camera moves and describe audio explicitly for better results.
• Weak on fast action, crowded scenes and legible on-screen text.