HappyHorse 1.1 I2V

​

Key capabilities

• First-frame image-to-video - Animate a single input image
• Synchronized audio - Generate audio with the video
• Resolution - 720P or 1080P
• Duration - An integer from 3 to 15 seconds
• Aspect ratio preservation - Output approximately follows the input image ratio

​

Input image requirements

• Formats: JPEG, JPG, PNG, or WEBP
• Input: public HTTP/HTTPS URL or Base64 data URL
• Dimensions: width and height must both be at least 300 pixels
• Aspect ratio: from 1:2.5 to 2.5:1
• File size: up to 20 MB

​

Quick example

curl https://www.anyfast.ai/v1/video/generations \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "model": "happyhorse-1.1-i2v",
    "input": {
      "prompt": "The cat runs across the grass as the camera follows smoothly.",
      "media": [
        {
          "type": "first_frame",
          "url": "https://example.com/cat.png"
        }
      ]
    },
    "parameters": {
      "resolution": "720P",
      "duration": 5,
      "watermark": false
    }
  }'

​

Parameters

​

Official reference