Speed Ramp

Background

Playback speed changes within one action, slowing at a marked instant then returning to normal rhythm.

Narrative function

Speed Ramp shapes how audiences read space, time, power, or emotion. Used with intention, it becomes part of the film's visual grammar rather than decoration.

How it works

Execute Speed Ramp with clear marks: lock lens, distance, lighting, and timing so the technique supports the beat. Rehearse once, then protect continuity across coverage.

When to use

• When the scene's emotion or geography benefits from Speed Ramp.
• When you want a readable visual motif that can pay off later.
• When a contrasting setup will make the next cut or reveal land harder.

FAQ

What is Speed Ramp?

A cinematic technique: Speed Ramp — a deliberate visual choice with readable grammar on screen.

When should I use Speed Ramp?

When the scene's emotion or geography benefits from Speed Ramp.

What is a common mistake with Speed Ramp?

Using Speed Ramp as a flex without story motivation.

Prompt

Includes camera move matched to the title, plus lens triad extras: focal length, aperture/T-stop, ISO, shutter, white balance, and the story being filmed.

16:9 cinematic demo: Speed Ramp.
Technique: Playback speed changes within one continuous action, slowing a chosen instant and returning to a faster rate.
Scene: A juggler tosses a single striped ball above a rehearsal bench and catches it in the other hand.
Start: Locked waist-up view; ball in left hand, right palm ready, bench horizontal behind.
Motion: Acquire the rehearsed toss at 120 fps, then follow the exact piecewise-linear source mapping in postprocess_en. The ball leaves near source 2.25 s and is caught near 2.85 s; output 2.5–5.5 s is the 20% segment containing the apex and catch.
End: The ball is still in the right hand and the juggler relaxes their shoulders.
Camera: 50 mm rectilinear prime; fixed focal length, f/5.6, shutter 1/240s, ISO 400, 120fps.
Light: A large 5600 K softbox sits above camera left; a narrow 5600 K rear strip describes the opposite edge. Keep fill one and a half stops below the key when metered separately. Protect the broad highlight so material roughness remains visible.
Color: Cream and blue ball against muted rust clothing. Preserve distinct shadow, midtone and highlight values within this palette; keep the named material treatment consistent between frames, with controlled highlights rather than a generic filter.
Duration: 8s. Mode: composite.

Related techniques

• Slow Motion

  More capture samples are replayed at a lower frame rate so an event occupies proportionally more screen time.

• Time-Lapse

  Widely spaced exposures compress slow environmental change, with interval and exposure specified separately.

• Freeze Frame

  A single selected frame is held so all visual sampling stops, including subject, background and texture.