Question 1

What is Happy Horse Image-to-Video?

Accepted Answer

Happy Horse Image-to-Video animates a still image into 1080p video with synchronized native audio and multilingual lip-sync. Drop in a portrait, product shot, or scene; the model fills in motion that's consistent with the source. If the image contains a face, lips track any generated dialogue across 30+ languages.

Question 2

How much does Happy Horse Image-to-Video cost on Runflow?

Accepted Answer

$0.14 per second of output at 720p, and $0.28 per second at 1080p. Per-second billing, no minimums. A typical 5-second 720p clip costs $0.70.

Question 3

What image formats and sizes are supported?

Accepted Answer

JPEG, JPG, PNG, BMP, and WEBP up to 10 MB. The shortest side must be at least 300 pixels. Aspect ratio must be between 1:2.5 and 2.5:1 — output preserves the source ratio.

Question 4

How long does a generation take?

Accepted Answer

Typical latency is 60-180 seconds for a 5-second clip. Image-to-video is slightly slower than text-to-video because the model encodes the source image first. Runflow routes across regions to keep latency stable during demand spikes.

Question 5

Can I use Happy Horse output commercially?

Accepted Answer

Yes — Runflow grants commercial use rights for everything generated via the API, including ads, e-commerce, and SaaS products. No additional licensing.

Question 6

Do I need to manage GPUs or infrastructure?

Accepted Answer

No. Runflow handles GPU provisioning, queueing, multi-region failover, and scaling. One HTTP call returns a video URL. No DevOps team needed.

alibaba/happy-horse/image-to-video

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