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Google modelsvideo generation api

google/veo3.1/fast/first-last-frame-to-video

Veo3.1 Fast First Last Frame To Video is Google's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.

Input
The text prompt describing the video you want to generate
The aspect ratio of the generated image. Allowed values: 21:9, 16:9, 3:2, 4:3, 5:4, 1:1, 4:5, 3:4, 2:3, 9:16.
The resolution of the generated video. Allowed values: 720p, 1080p, 4k.
The duration of the generated video. Allowed values: 4, 6, 8.
Whether to generate audio for the video.
The seed for the random number generator.
URL of the first frame of the video
URL of the last frame of the video
Idle

Example output — click Run to generate your own

API README

Veo 3.1 Fast

google/veo3.1/fast/first-last-frame-to-video builds a coherent video between supplied opening and closing images, using the prompt to direct the intervening action. Veo 3.1 improves instruction following, physical consistency, character continuity, and audiovisual quality while supporting more ways to anchor or continue a shot. This combination makes the model a practical choice when the creative outcome depends on those qualities rather than on a generic media conversion.

For production work with google/veo3.1/fast/first-last-frame-to-video, this Fast first-and-last-frame interpolation workflow prioritizes turnaround for concept comparison, previsualization, social creative, and high-volume variation before a final direction is selected. The result is most reliable when the source material and creative brief clearly describe the intended subject, progression, visual or sonic character, and the qualities that must remain unchanged.

Highlights

Two-frame anchoring connects explicit opening and ending compositions through generated motion.

Improved physical coherence strengthens object interactions, character movement, and cause-and-effect across shots.

Fast creative iteration produces cinematic alternatives more quickly for review and selection.

Native audio generation coordinates dialogue, ambience, and sound effects with the visual action.

Pricing

Duration720p/1080p, audio off720p/1080p, audio on4K, audio off4K, audio on
4 seconds$0.400$0.600$1.200$1.400
6 seconds$0.600$0.900$1.800$2.100
8 seconds$0.800$1.200$2.400$2.800

When to Use

✅ Good fit❌ Consider alternatives
The model's named workflow matches the source material and intended outputA different input modality or model route is required
A managed asynchronous result is suitable for the production pipelineA synchronous, interactive editor is essential
The documented controls cover the required duration, framing, or formatThe project needs controls outside this endpoint's schema
Creative iteration benefits from a repeatable request structureExact deterministic pixels, frames, geometry, or samples are mandatory
A finished downloadable media asset is the desired deliverableEditable source layers or a native project file are required

Prompt Guide

For generation, state the intended result first, then add the subject or source treatment, progression, style, and delivery constraints. Keep one creative variable per phrase, use the documented field names for controls, and change one setting at a time when comparing results.

{
  "aspect_ratio": "21:9",
  "duration": 8,
  "prompt": "A woman looks into the camera, breathes in, then exclaims energetically, \"have you guys checked out Veo3.1 First-Last-Frame-to-Video on Fal? It's incredible!\"",
  "resolution": "720p"
}

Technical Specs

SpecValue
Model IDgoogle/veo3.1/fast/first-last-frame-to-video
Inputsaspect_ratio, duration, first_frame_url, generate_audio, last_frame_url, prompt, resolution, seed
Required inputsprompt
Output fieldscontent_type, url
ExecutionAsync (submit, then poll for result)
Duration4 / 6 / 8
Resolution720p / 1080p / 4k
Aspect Ratio21:9 / 16:9 / 3:2 / 4:3 / 5:4 / 1:1 / 4:5 / 3:4 / 2:3 / 9:16

Related Models

Related Models

google/veo3.1/fastVeo3.1 Fast is Google's text-to-video AI model. Turn written scripts and prompts into professional-quality video clips with realistic motion, lighting, and scene composition.google/veo3.1/fast/extend-videoVeo3.1 Fast Extend Video by Google - AI-powered video editing and transformation. Apply style transfer, motion control, lip-sync, and visual effects to existing videos with natural language instructions.google/veo3.1/fast/image-to-videoVeo 3.1 Fast is Google's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.google/veo3.1/fast/reference-to-videoVeo3.1 Fast by Google - animate still images into dynamic videos with AI. Transform photos into cinematic clips with natural motion, camera movement, and optional audio generation.google/veo3.1Veo3.1 by Google - generate cinematic videos from text descriptions with AI. Create high-quality video content with natural motion, camera control, and optional audio generation.google/veo3.1/extend-videoVeo3.1 Extend Video is Google's video-to-video AI model. Transform, enhance, and edit video content using text prompts - from style changes to object manipulation and scene modification.google/veo3.1/first-last-frame-to-videoVeo3.1 First Last Frame To Video by Google - animate still images into dynamic videos with AI. Transform photos into cinematic clips with natural motion, camera movement, and optional audio generation.google/veo3.1/image-to-videoVeo 3.1 by Google - animate still images into dynamic videos with AI. Transform photos into cinematic clips with natural motion, camera movement, and optional audio generation.