Speed Ramp
From warp 1 to warp 9 and back — action made impossible, slow moments made eternal.
A speed ramp (also called a time ramp or velocity ramp) is an in-clip speed change that transitions smoothly between different playback rates rather than switching abruptly from slow to normal. In a typical speed ramp, a clip might play at 20% speed (slow motion) as an action begins, then gradually accelerate through 50%, 75%, and back to 100% (normal speed) as the action completes — or conversely, decelerate from normal speed into slow motion to emphasize a specific moment. The gradual transition between speeds creates a fluid, cinematic quality distinct from both uniform slow motion (constant slow rate) and an abrupt speed change (jarring discontinuity).
Speed ramps are executed in NLE software through time remapping — a feature that allows the editor to plot variable speed curves over a clip's duration. In Premiere Pro, the "Time Remapping" effect allows keyframes to be set at different speed percentages at different time positions, with smooth Bezier curves controlling the transitions between those speeds. Final Cut Pro and DaVinci Resolve have equivalent tools. The key variable is the smoothness of the acceleration curve: a sharp transition through speed rates feels abrupt and mechanical; a smooth, gradual acceleration or deceleration feels organic and cinematic. Getting the Bezier curve right for a natural-feeling ramp is the editorial skill.
Speed ramping requires footage shot at higher-than-normal frame rates to enable genuine slow motion. A standard 24fps clip played at 50% produces choppy, artificial slow motion. Footage shot at 60fps or 120fps played at 50% produces smooth slow motion because the source has twice or four times the frames per second needed. For true cinematic speed ramping at 80–90% slow motion, 120fps or 240fps source footage is required. For B2B video, speed ramps appear in product reveal moments (slow into the product's hero shot), event highlight reels (slow motion on emotional reactions, then ramping back to real-time action), and any branded content where visual sophistication is a creative priority.
Related terms
- Timelapse— The Eye of Sauron sweeping across Middle-earth at 1000x speed — entire seasons compressed to seconds.
- Hyperlapse— The Palantír of time-lapse — move through space AND time simultaneously, with dizzying results.
- Timestretch— The Time-Turner that makes audio defy its own physics — duration changes, pitch does not.
- Frame Rate (FPS)— How many times per second Middle-earth renders — The Hobbit films discovered the wrong answer.
- Pacing— The tempo deciding whether your edit feels like the Shire or the Battle of Helm's Deep.