Runway Image Animation API

Professional image animation with cinema-quality results

Authentication

To access Runway Image-to-Video API through Doitong API, use your Doitong API key. Include it in the GraphQL mutation or REST API headers.

// GraphQL Header
{
  "Authorization": "Bearer YOUR_API_KEY"
}

// REST Header
"X-API-Key": "YOUR_API_KEY"

Quick Start

Get started with Runway Image-to-Video API in just a few minutes. Follow these simple steps to generate your first image to video.

Step 1: Get Your API Key

Sign up for a Doitong account and navigate to your dashboard to generate an API key.

Step 2: Make Your First Request

Use one of the code examples below to make your first API call.

curl -X POST https://api.doitong.com/graphql \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Idempotency-Key: unique-request-id-123" \
  -d '{
    "query": "mutation Generate($input: GenerateInput!) { generate(input: $input) { id status type provider url metadata creditCost } }",
    "variables": {
      "input": {
        "type": "VIDEO",
        "provider": "runway-i2v",
        "input": {
          "image": "https://example.com/your-image.jpg"
        },
        "options": {
          "duration": 5,
          "motionIntensity": "medium"
        }
      }
    }
  }'

const response = await fetch('https://api.doitong.com/graphql', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer YOUR_API_KEY'
  },
  body: JSON.stringify({
    query: `
      mutation AnimateImage($input: ImageAnimationInput!) {
        animateImage(input: $input) {
          id
          status
          url
        }
      }
    `,
    variables: {
      input: {
        service: 'runway-i2v',
        imageUrl: 'https://example.com/your-image.jpg',
        duration: 5,
        motionIntensity: 'medium'
      }
    }
  })
});

const data = await response.json();
console.log('Animated Video:', data.data.animateImage);

import requests
import json

url = "https://api.doitong.com/graphql"
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_API_KEY"
}

query = """
mutation Generate($input: GenerateInput!) {
  generate(input: $input) {
    id
    status
    type
    provider
    url
    metadata
    creditCost
  }
}
"""

variables = {
    "input": {
        "type": "VIDEO",
        "provider": "runway-i2v",
        "input": {
            "imageUrl": "https://example.com/your-image.jpg"
        },
        "options": {
            "duration": 5,
            "motionIntensity": "medium"
        }
    }
}

response = requests.post(url, json={
    "query": query,
    "variables": variables
}, headers=headers)

data = response.json()
print("Result:", data["data"]["generate"])

mutation Generate($input: GenerateInput!) {
  generate(input: $input) {
    id
    status
    type
    provider
    url
    metadata
    creditCost
    createdAt
  }
}

# Variables
{
  "input": {
    "type": "VIDEO",
    "provider": "runway-i2v",
    "input": {
      "imageUrl": "https://example.com/your-image.jpg"
    },
    "options": {
      "duration": 5,
      "motionIntensity": "medium",
      "version": "gen-4"
    }
  }
}

Pricing

The Runway Image-to-Video API uses a credit-based pricing model. Credits are consumed based on the complexity and duration of the generated content.

API Endpoints

The Runway Image-to-Video API is available through our unified GraphQL endpoint.

GraphQL Endpoint

POST https://api.doitong.com/graphql

REST Endpoint

POST https://api.doitong.com/v1/image_to_video

Parameters

Available parameters for Runway Image-to-Video API requests:

Response Format

All API responses follow a consistent format:

Success Response

{
  "data": {
    "imagevideo": {
      "id": "abc123xyz",
      "status": "processing",
      "url": null,
      "webhookUrl": "https://your-webhook.com/callback",
      "createdAt": "2024-01-01T00:00:00Z"
    }
  }
}

Completed Response

{
  "data": {
    "imagevideo": {
      "id": "abc123xyz",
      "status": "completed",
      "url": "https://cdn.doitong.com/outputs/abc123xyz.mp4",
      "duration": 5,
      "createdAt": "2024-01-01T00:00:00Z"
    }
  }
}

Error Handling

The API uses standard HTTP status codes and returns detailed error messages.

Common Error Codes

Error Response Format

{
  "errors": [
    {
      "message": "Insufficient credits for this operation",
      "extensions": {
        "code": "INSUFFICIENT_CREDITS",
        "creditsRequired": 100,
        "creditsAvailable": 50
      }
    }
  ]
}

Webhooks

Receive real-time notifications when your image to video generation is complete.

Setting Up Webhooks

Include a <code>webhookUrl</code> parameter in your request to receive a POST notification when processing is complete.

Webhook Payload

{
  "id": "abc123xyz",
  "status": "completed",
  "url": "https://cdn.doitong.com/outputs/abc123xyz.mp4",
  "service": "runway-i2v",
  "createdAt": "2024-01-01T00:00:00Z",
  "completedAt": "2024-01-01T00:01:00Z",
  "metadata": {
    "duration": 5,
    "width": 1920,
    "height": 1080
  }
}

Webhook Security

All webhook requests include a signature header for verification:

X-Doitong-Signature: sha256=abc123...

Rate Limits

To ensure fair usage and system stability, the following rate limits apply:

Best Practices

1. Optimize Your Prompts

Write clear, descriptive prompts for best results:

• Be specific about visual elements, style, and mood
• Include details about lighting, camera angles, and composition
• Avoid contradictory or impossible requests

2. Handle Async Processing

Generation is asynchronous. Implement proper polling or webhooks:

// Polling example
async function pollStatus(jobId) {
  let status = 'processing';
  while (status === 'processing') {
    await sleep(2000); // Wait 2 seconds
    const result = await checkJobStatus(jobId);
    status = result.status;
  }
  return result;
}

3. Error Recovery

Implement retry logic with exponential backoff:

async function retryWithBackoff(fn, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await fn();
    } catch (error) {
      if (i === maxRetries - 1) throw error;
      await sleep(Math.pow(2, i) * 1000);
    }
  }
}

4. Monitor Credit Usage

Track your credit consumption to avoid interruptions:

• Check credit balance before large batch operations
• Set up alerts for low credit thresholds
• Implement credit-aware request queuing

Ready to Get Started?

Join thousands of developers using Runway Image-to-Video API to create amazing content