Recast · AI face swap
Hook Studio is an AI reel maker that recasts short videos for creators and brands. Give it a 4 to 15 second video and a photo of who goes in, and it swaps the people and keeps the motion, the camera, the setting, the length, and the original sound. It is not a free face swap app: a 5 second recast costs 579 credits, about $5, and you see the price before anything runs.
A face swap video pastes a new face onto the original body. A recast generates the video again with your person in it: face, body, hair, and clothes. Everything else comes from the original.
That is why a pasted face often gives itself away at the jaw, the hairline, and the neck: the skin, the hair, and the clothes still belong to someone else. In Hook Studio you give 1 to 8 reference images, in the order the people appear, and the model generates the video again with them.
| From the original video | In the recast |
|---|---|
| The motion and the timing | Kept |
| The camera and the framing | Kept |
| The setting, the light, and the props | Kept |
| The length | Kept, 4 to 15 s |
| The sound | Kept as it is |
| The people: face, body, hair, and clothes | Swapped for your references |
| The resolution | 720p |
Recast when the video already works and the hook is in the motion. You keep what made it work and change who is in it.
When the hook is the idea and not the motion, skip the face swap and copy the format with a still and a clip: 107 credits for a 5 second hook instead of 579.
Many videos work because of an idea, not a move: a POV line over someone looking at the camera, a day in the life, a before and after. Nobody owns that idea. The agent rebuilds it with your person in a new still and a short clip, in a setting you choose.
The prices below leave out the automatic realism checks, a few credits each. Even so, the gap is 4 to 5 times per hook.
| 5 s hook | Best path | Credits |
|---|---|---|
| A dance or a transition | Recast | 579 |
| Someone looks at the camera, with text on screen | Still + Kling 3 clip | 107 |
| Someone says one line | Still + clip with its own voice | 154 |
A recast comes back with the original sound exactly as it was. That fits a dance, where the moves sit on the beat. It is a problem when someone talks, because their voice now comes out of your person's mouth.
Hook Studio recasts only videos you have the right to use, only with people who agreed, and never with a famous person.
Upload a 4 to 15 second video, or paste the link to a TikTok or Instagram post you have the right to use (5 credits to import). If it is longer, the agent trims it to the moment that matters, for free.
Upload photos of yourself, or use a saved avatar or a still you made in the session. One reference per person, in the order they appear, up to 8.
The agent shows the price in credits and waits. Nothing runs until you confirm. The recast comes back at final quality, 720p.
Mute the original for free, add your voiceover, or lip-sync to a voice line. The hook text and the end card go on top in the final render, for a few credits.
You get the video, the cover, and a caption with hashtags, with the AI label on it. You post it yourself on TikTok or Instagram; direct posting is not available yet.
There is no free video face swap in Hook Studio. A recast is charged per second of the trimmed video, and per second it is the most expensive step in the app. Your first $5 costs $3 and gives you 500 credits: enough for a 4 second recast (464), not for a 5 second one (579). Plans start at $20 a month for 2,300 credits. Add 5 credits if you import a link, a few for the render, and a few for each realism check. A video under 4 seconds is billed as 4.
| Job | Credits | About, on Concept |
|---|---|---|
| Recast, 4 s (720p) | 464 | $4.03 |
| Recast, 5 s | 579 | $5.03 |
| Recast, 10 s | 1,158 | $10.07 |
| Recast, 15 s | 1,737 | $15.10 |
| Recast draft, 5 s (480p, a different take) | 271 | $2.36 |
| Voice line + lip sync, 5 s | 5 + 71 | $0.66 |
| Still + Kling 3 clip, 5 s (no recast) | 107 | $0.93 |
| Trim, mute, replace the audio | Free | $0 |