# Hop Hop Hop Dance — capabilities and model status

This document describes the current product interface. It is not an AI-provider catalog or an inference API specification.

| Capability | Current status |
| --- | --- |
| Replace A only | Image 1 replaces A; original B is preserved |
| Replace A + B | Both image 1 for A and image 2 for B are required |
| Local photo preview and removal | Available in the current browser session |
| Phone-to-computer upload | Available through a short-lived QR pairing |
| Public video generation | Signed-in users with sufficient account credits |
| Package checkout | Enabled |
| Generation model | Kie bytedance/seedance-2-mini; API key required |
| Account result | Status polling and playback/link; current task resumes in the same browser session |

The A-only and A+B choices are replacement modes, not different model providers. Single, Five Pack, Ten Pack are package names, not model identifiers.

Generations request 5 seconds, 9:16, 720p, generate_audio=false, with reference_image_urls and reference_video_urls together. Images define full appearances; the original video defines movement, timing, paths, occlusion, scene and its original cut around 4.4 seconds. After the cut, B is in the foreground and A in the background; identities remain fixed. The server automatically copies the original soundtrack into the generated picture and saves the finished MP4. The page offers playback and download only after this succeeds. Audio/save failures can be retried without another paid generation. Output fidelity is not guaranteed.

The footer AI links open third-party AI interfaces with a suggested evaluation prompt. They do not call an AI API, send photos, automatically submit messages or make those providers part of the generation pipeline. Google AI Mode is labelled as that destination rather than as the Gemini app.

Related: [Product index](https://hophophopdance.net/llms.txt) · [Display prices](https://hophophopdance.net/pricing.md) · [Photo guide](https://hophophopdance.net/#photo-tips)