Frequently asked questions

Speed, cost, privacy and what to do when it goes wrong. If your question isn't here, ask me directly.

How long does one take?

About 40 to 50 seconds once the model is warm. If nobody has used the site for a while, the first run takes 3 to 4 minutes because the graphics card has to load tens of gigabytes of model weights back into memory. The second one is back to normal.

How long is the output? Can it be longer?

3 seconds generated, 6 seconds after it is turned into a forward-and-reverse ping-pong loop. The length is fixed for now: the motions are small things like blinking and smiling, and stretching them out makes the model start improvising, which usually looks worse.

Is there sound?

No, deliberately. A looping portrait with a looping ambience track gets annoying fast, and the reversed half sounds wrong. The output is picture only.

Can I download it?

Yes — the result page has a download link and gives you an mp4. Note the file does not include the frame; the frame is an effect drawn by the web page.

How many free runs do I get?

Three per IP address per day, resetting at midnight (Taiwan time). A free account gives you unlimited runs.

Does an account cost anything?

No. You register with an email address and a password. The email is only your account name — used for logging in and future password recovery — and we never send marketing email. Email addresses are not verified at the moment, so please type it correctly.

Why do I have to log in to see my history?

Without a login, the only thing identifying you is a browser cookie, which can be cleared at any time. More importantly, if we identified people by IP address, everyone behind the same router would see each other's uploaded photos — which is something we will not do. Logging in ties your results to your account instead.

Will my photo be used to train an AI?

No. The model runs on our own graphics card, your photo is never passed on to any third-party AI service, and there is no training process anywhere in the pipeline. Details in the privacy policy.

How long do you keep my photo?

Both the uploaded photo and the generated video are deleted automatically after 7 days. Download anything you want to keep.

Can I upload nude or sexual photos?

No. Uploads go through an automatic nudity check that runs on our own machine; anything flagged is deleted immediately and never processed, and the finished frames are scanned again. This is explicitly forbidden by the terms of service. No detector is perfect — if your photo was wrongly blocked, tell us via the contact page.

Can I upload a photo of someone else?

Get their consent first. Making a video of someone else's face moving can infringe their personality and likeness rights in many jurisdictions, and it is forbidden by our terms of service.

The face doesn't look like the person. What now?

First check that there is only one subject in the frame and that nothing covers the face — those two matter far more than resolution. (We tested squashing a portrait to 96 pixels wide and the result was nearly identical; comparison clips on the failure cases page.) If both are fine, switch to "Quiet breathing".

Why did a person appear in my bird / cat / dog photo?

You picked a motion from the People tab. Those prompts say "the person…", and when there is no person in the photo the model produces one. Use the "Animals & other" tab instead.

Can I type in my own motion?

Not at the moment — you pick from the preset list. Once free-text prompts are allowed, the odds of strange things appearing rise sharply; the invented-human case above is the perfect illustration.

Can I run several at once?

No — one job per person at a time. That is not artificial scarcity: there is a single graphics card, and the more people queue, the longer everyone waits. Open as many tabs as you like; they all show the same job.

Can I cancel halfway?

Yes. The progress screen has a cancel button, and it genuinely tells the graphics card to stop so the next person can start. Cancelling does not use up a free run.

What if I close the page?

Nothing is lost. The job keeps running on the server and the page reattaches to it when you come back. The same applies to a dropped connection — the page retries instead of giving up.

Which image formats work?

jpg, png and webp.

Can I use the result commercially?

Your photo stays yours and the resulting video is yours; we claim no rights over either. Just make sure you had the right to use the original photo in the first place.

Does it work on a phone?

Yes — the whole interface is built mobile-first. You can switch away to another app while it generates; it reconnects when you come back.

Why is the queue sometimes long?

Everyone shares one graphics card and it processes one job at a time. The home page shows how many jobs are queued, and while you wait the progress bar tells you how many are ahead of you.