HappyHorse 1.1 I2V
[Core Function] HappyHorse 1.1 I2V is Alibaba’s latest streamlined first-frame image-to-video model. [Strengths] It turns a single image into high-quality 720P/1080P video with native audio support and 3-15 second duration; output aspect ratio follows the first frame image. [Best For] Highly recommended for: rapid image animation, product motion previews, and simple character or scene animation. [Limitations] It does not accept an explicit ratio parameter; use T2V or R2V when you need a fixed generated aspect ratio. [Routing] Prefer this model when the user provides one image and requests HappyHorse image animation.
Authorizations
API Key authentication. Format: Bearer YOUR_API_KEY.
Body
First frame image URL. Supports HTTP/HTTPS URLs. Image requirements: Format: JPEG, JPG, PNG, WEBP; Resolution: Width and height >= 300 pixels; Aspect ratio: 1:2.5 ~ 2.5:1; File size: <= 10MB
^https?://"https://example.com/first.jpg"
Optional text prompt to guide video generation. Supports any language input. Maximum length: 5000 non-Chinese characters or 2500 Chinese characters (automatically truncated if exceeded)
5000Video resolution level. The model automatically scales to the nearest total pixels based on the selected resolution. The output video aspect ratio approximately matches the input first frame
720P, 1080P Video duration in seconds. Must be an integer between 3 and 15
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 3 <= x <= 15Random seed for reproducibility. If not specified, the system generates a random seed. Note: Due to the probabilistic nature of model generation, even with the same seed, results may not be completely identical
0 <= x <= 2147483647