infinite-talk/fast
Create lifelike videos from voices with accurate sync and adaptive dubbing.
Veo 3.1 Fast Video Extend: Realistic Video-to-Video Scene Continuation on playground and API | RunComfy
google-deepmind/veo-3-1/fast/extend-video
Rapidly extend videos with a fixed 7-second duration at 720p. Optimized for low-latency iteration, social media formats, and quick continuity testing.
Idle
The rate is $0.1 per second without audio, and $0.15 per second with audio.
Introduction to Veo 3.1 Fast Video Extend
Veo 3.1 Fast Video Extend is the high-velocity variant of Google DeepMind's generative video model, engineered specifically for rapid prototyping and high-volume content creation. Trading the ultra-high resolution of the standard model for superior inference speed, this tool allows creators to extend clips by 7 seconds in 720p with minimal wait times. It is the ideal solution for social media teams, storyboard artists, and developers who need to iterate on narrative flows and continuity concepts quickly before committing to final high-resolution renders.
Key Capabilities
- Low-Latency Extension: Optimized for speed, Veo 3.1 Fast generates extensions significantly quicker than the standard model, making it perfect for A/B testing creative directions.
Comparison: Fast vs. Standard
- Use Veo 3.1 Fast when: You need to generate dozens of variations quickly, creating content for TikTok/Reels (where 720p is acceptable), or testing storyboard concepts.
- Use Standard Veo 3.1 when: You need 1080p+ resolution, variable durations, or final cinema-grade production assets.
Example Prompts
- Social Media Loop: "Keep the subject dancing in the center, maintain the upbeat energy, seamless loop."
- Narrative Bridge: "The car drives off into the sunset, fading to black."
- Environment Expand: "Pan upwards to show the tops of the trees and the blue sky."
Related Tools
- For high-fidelity, 1080p extensions: Veo 3.1 Video Extend.
- For generating video from text (Fast): Veo 3.1 Fast Text-to-Video.
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Frequently Asked Questions
What is Veo 3.1 Fast Video Extend used for?
Veo 3.1 Fast Video Extend is an AI-based generation tool from Google DeepMind designed to lengthen and enhance short clips using its video-to-video extension system. It enables users to continue existing clips seamlessly while maintaining realistic motion, lighting, and style.
How does the video-to-video process in Veo 3.1 Fast Video Extend work?
The video-to-video process in Veo 3.1 Fast Video Extend analyzes the last second of a source clip and uses it as context to generate new frames that preserve scene continuity. This makes it ideal for extending shots in storytelling, advertising, or creative editing.
What are the key benefits of using Veo 3.1 Fast Video Extend over older versions?
Veo 3.1 Fast Video Extend offers improved prompt adherence, better synchronization of visuals and native audio, and higher-quality cinematic transitions in video-to-video workflows. It’s also optimized for quicker outputs at a lower cost than earlier Veo versions.
Is Veo 3.1 Fast Video Extend free to use?
Veo 3.1 Fast Video Extend is not entirely free; access typically depends on credits within supported platforms like Runcomfy’s AI playground. Some users receive trial credits, but continued use of the video-to-video extension features requires credit purchases or subscriptions.
Who can benefit most from Veo 3.1 Fast Video Extend?
Veo 3.1 Fast Video Extend is especially useful for filmmakers, marketers, social media creators, and businesses seeking consistent visual style across multiple clips. The video-to-video system ensures smooth continuity, making it ideal for narrative sequences or campaign content.
What quality and resolution can I expect from Veo 3.1 Fast Video Extend output?
Veo 3.1 Fast Video Extend can generate videos up to 1080p resolution in 16:9 or 9:16 aspect ratios. While its video-to-video mode prioritizes speed, it still maintains strong visual coherence, realistic motion, and cinematic lighting quality.
On which platforms can I access Veo 3.1 Fast Video Extend?
Veo 3.1 Fast Video Extend is available through Google’s Gemini API, Vertex AI, and third-party integrations such as Runcomfy’s AI playground. The video-to-video mode functions smoothly on standard desktop and mobile web browsers.
What are the main limitations of Veo 3.1 Fast Video Extend?
While Veo 3.1 Fast Video Extend produces fast, high-quality results, its video-to-video feature may occasionally show style drift or minor inconsistencies in long multi-hop extensions. Additionally, some minor audio mismatches may occur in complex or highly dynamic scenes.
Does Veo 3.1 Fast Video Extend support both text-to-video and video-to-video generation?
Yes, Veo 3.1 Fast Video Extend supports both text-to-video and video-to-video generation modes. Users can either generate fresh clips from text prompts or extend existing videos while preserving cinematic continuity and audio fidelity.
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