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technique · 1 recipe

Fast Motion

Continuous action is played at a fixed faster rate, compressing its duration without introducing an interval-photography claim.

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This previewGrok · 10 seconds measuredA bookbinder clears a worktable by stacking offcuts, brushing dust and rolling a cloth.Preview sources — switch models above.

Selected recipe

Fast Motion

This is the default recipe for the Constant Fast Motion family.

Free short AI video prompt

A starter line you can copy. The full timed recipe, still-image and production prompts are on the shot card.

Prompt rule: Apply one constant source-time multiplier to continuous action; preserve causal order and distinguish retiming from interval acquisition.

Fast Motion: Continuous action is played at a fixed faster rate, compressing its duration without introducing an interval-photography claim. Keep the subject readable; motivate camera and light.

Technique guide

When to use
Reach for Fast Motion when you need this effect: Continuous action is played at a fixed faster rate, compressing its duration without introducing an interval-photography claim.
How it works
Apply one constant source-time multiplier to continuous action; preserve causal order and distinguish retiming from interval acquisition.
Common mistakes
If the result does not follow this rule, it is not this technique: Apply one constant source-time multiplier to continuous action; preserve causal order and distinguish retiming from interval acquisition. Do not change multiple variables at once so the effect becomes unreadable.

How to read this page

Fast Motion is one technique in Time & Tempo. The definition states the single mechanism the frame has to show. The technique guide covers when to use it, the steps, the usual mistakes, how it differs from the neighbors, and what a successful take looks like.

The clip above is one reading, made with a third-party video model. Another model, or the same model on another day, can land on a different frame. It is an example, not a promise that a prompt will match it.

The free short prompt is a starter sentence. The shot card is the timed recipe: scene, start and end frames, action, light, and color. Three sample cards are free on the site. The rest are part of GrokCine Pro. A second name for the same shot keeps its own URL and points back at this definition.

When you write a prompt, keep the one mechanism in the definition, then name the subject, the motion, and why the light is there. Do not stack a neighboring technique into the same sentence. If the name or the example is wrong, send this page's URL from the contact page.

Recipe

8 seconds · single take

A 1920s silent-comedy homage: a frantic young housemaid clears the cluttered breakfast table before her mistress returns — stacking plates at left, brushing the crumbs from the center and rolling up the linen runner at right — played at four times speed.

Shot cards

The full recipe for Fast Motion is a shot card

The full recipe for Fast Motion is a shot card. The start and end frames, timed action, lighting and color specs, a camera parameter table, copy-ready still-image and video prompts and negatives are open to GrokCine Pro members on the web.

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Related families

More in Time & Tempo

References

Sources we studied for this technique. External links; we don't embed them.

Articles & definitions

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