The live catalog splits on required inputs. A large class needs a photo. A smaller class needs a clip. A larger class needs only text. Seven models need both a still and footage. That cut is why /without exists: the missing input sends you down a different route set.
Image-to-video takes a still and invents motion. Video-to-video restyles or edits footage you already shot. Motion-control drives a still with a driving clip — that is the both-required case. Treating a video-in model as a text-to-video row is how you get a refused job, not a cheaper one.
The audio boolean on a row is not this flag. Native audio is what the output may contain. Video input is what you must bring.
In practice
- Read the required inputs on the model page before you write the prompt.
- If you have a still and no clip, do not pick a video-in row; pick image-to-video or text-to-video.
- Motion-control needs both a character still and a driving take — missing either is a different model.
The mistake to avoid
Pasting a prompt into a video-to-video or motion-control row and reading the refusal as a model failure. The ceiling was the missing file.
Related terms
Image-to-video
Image-to-video animates a still you supply: the picture becomes the opening frame, and the prompt describes only what happens next.
Video-to-video
Video-to-video takes finished footage in and returns altered footage, using the original clip as the structural reference for every frame.
Motion control
AI motion control copies the movement and expressions from a reference video onto a character image, as in Kling Motion Control. The performer changes.
Reference-to-video
Reference-to-video means the model builds a clip from separate images of a subject it can place anywhere. Those images are an identity, not the first frame.
Seed
Seed meaning: the number that sets the random starting noise so the same seed and settings can reproduce the same output.
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