What minimum input does happyhorse-1.1-t2v require?
Provide a prompt to start text-to-video generation, using action=generate and model=happyhorse-1.1-t2v. The prompt should clearly describe the subject, environment, action, and camera direction; resolution, aspect ratio, and duration can be set separately according to delivery requirements, and no image needs to be prepared beforehand.
Can it generate landscape and portrait videos?
Yes. This entry point supports 16:9, 9:16, 1:1, 4:3, and 3:4, with 16:9 as the default. Choose 9:16 for social short videos and 16:9 for landscape previews; it is best to determine the target aspect ratio before generation to reduce the impact of later cropping on subject placement and composition.
How should I choose duration and resolution?
The requested duration can be set to 3–15 seconds, with 5 seconds as the default; supported resolutions are 720P and 1080P, with 1080P as the default. During exploration, you can first use shorter clips to validate motion and composition, then choose the resolution based on presentation needs after the visual direction is confirmed, avoiding stacking too many events into a single clip.
I already have a product image. Should I still choose T2V?
If you only want to explore the environment and advertising atmosphere around the product, T2V is still suitable. If the product appearance and first-frame composition must follow an existing image, prioritize happyhorse-1.1-i2v; when multiple character, prop, or style images jointly participate as constraints, consider happyhorse-1.1-r2v.
How do I obtain the generated video after submission?
You can set async=true, save the returned task_id, and query it through /happyhorse/tasks; you can also provide callback_url to receive completion notifications. Task statuses include pending, succeeded, and error. After success, read video_url to download the video; obtaining a task ID should not be treated as generation completion.