Kling I2V Frames V2.5 — Start-End Frame to Video

Generate videos that interpolate between a start and end frame using Kling I2V Frames V2.5

POST /v1/jobs/submit

Kling I2V Frames V2.5 — 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>",
    "image_url": "<string>",
    "end_image_url": "<string>",
    "quality": "<string>",
    "duration": "<string>",
    "aspect_ratio": "<string>",
    "seed": 123
  }
}
'

200

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

Generate a smooth video that transitions from a start frame to an end frame with Kling I2V Frames V2.5. Ideal for controlled keyframe animation, morphing transitions, and product shots.

Property	Value
Provider	Kling
Model	Kling I2V Frames V2.5
Capability	Start-End Frame to Video
Base Cost	50,000 micro-cents/second ($0.05/sec)
Processing Time	~240 seconds

Request Body

model · string · required

Model slug. Use kling/kling-i2v-frames-v25/start-end-frame-to-video.

input · object · required

Input parameters for start-end frame video generation.

Hide properties

prompt · string

Text description guiding the transition (max 2500 characters).

image_url · string · required

URL of the start frame image.

end_image_url · string · required

URL of the end frame image.

quality · string

Generation quality. Default: std. Options: std, pro.

duration · string

Video duration in seconds. Default: 5. Options: 5, 10.

aspect_ratio · string

Video aspect ratio. Default: 16:9. Options: 16:9, 9:16, 1:1.

seed · integer

Optional random seed for reproducible results.

webhookUrl · string

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

Pricing

Base cost: 50,000 micro-cents per second ($0.05/sec)

finalCost = baseCost × quality × duration

Factor	Option	Multiplier
Quality	std	1x
	pro	1.5x
Duration	5	5x
	10	10x

Default cost: std quality, 5 seconds = 50,000 × 1 × 5 = 250,000 micro-cents ($0.25)

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": "kling/kling-i2v-frames-v25/start-end-frame-to-video",
    "input": {
      "prompt": "A flower blooms from bud to full blossom",
      "image_url": "https://example.com/image.jpg",
      "end_image_url": "https://example.com/image.jpg",
      "quality": "std",
      "duration": "5",
      "aspect_ratio": "16:9"
    }
  }'