Veo 3.1 Fast — Start-End Frame to Video

Generate fast video transitions between two key frames using Google’s Veo 3.1 Fast model via PixelByte API

POST /v1/jobs/submit

Veo 3.1 Fast — Start-End Frame to Video

cURL

curl --request POST \
  --url https://api.muvi.video/v1/jobs/submit \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "<string>",
  "input": {
    "prompt": "<string>",
    "start_frame_url": "<string>",
    "end_frame_url": "<string>",
    "aspect_ratio": "<string>",
    "duration": "<string>",
    "resolution": "<string>"
  }
}
'

200

{
  "jobId": "<string>",
  "status": "<string>",
  "estimatedCompletionTime": "<string>",
  "costMicroCents": 123
}

Generate fast, cost-efficient video transitions between two key frames with Google’s Veo 3.1 Fast model. Provide a start frame, an end frame, and an optional text prompt to guide the in-between motion.

Property	Value
Provider	Google
Model	Veo 3.1 Fast
Capability	Start-End Frame to Video
Base Cost	100,000 micro-cents/second ($0.10/sec)
Processing Time	~85 seconds

Request Body

model · string · required

Model slug. Use google/veo-3.1-fast/start-end-frame-to-video for start-end frame video generation.

input · object · required

Input parameters for start-end frame to video generation.

Hide properties

prompt · string

Optional text description guiding the motion between frames (max 4000 characters).

start_frame_url · string · required

URL of the start frame image.

end_frame_url · string · required

URL of the end frame image.

aspect_ratio · string · required

Video aspect ratio. Default: 16:9. Options: 16:9, 9:16.

duration · string

Video duration in seconds. Default: 4. Options: 4, 6, 8. Affects pricing.

resolution · string

Output resolution. Default: 720p. Options: 720p, 1080p, 4k.

webhookUrl · string

HTTPS URL to receive a webhook notification when the job completes or fails.

Pricing

Base cost: 100,000 micro-cents per second ($0.10/sec)

finalCost = baseCost × duration

Factor	Option	Multiplier
Duration	4	4x
	6	6x
	8	8x

Default cost: 4 seconds = 100,000 × 4 = 400,000 micro-cents ($0.40)

Response

jobId · string

Unique identifier for the submitted job.

status · string

Initial job status. Always "pending" on successful submission.

estimatedCompletionTime · string

ISO 8601 timestamp of the estimated completion time.

costMicroCents · number

The cost of the job in micro-cents.

Code Examples

cURL

curl -X POST https://api.muvi.video/v1/jobs/submit \
  -H "Authorization: Bearer $PIXELBYTE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "google/veo-3.1-fast/start-end-frame-to-video",
    "input": {
      "prompt": "A timelapse of clouds moving over mountains",
      "start_frame_url": "https://example.com/image.jpg",
      "end_frame_url": "https://example.com/image.jpg",
      "aspect_ratio": "16:9",
      "duration": "4",
      "resolution": "720p"
    }
  }'