Speed & Ramps in Zella

Quick answer: In Zella, cut a segment (B), select it, and set its speed in the transport’s 1× ▾ control. 2× halves that segment’s duration on export; values below 1× create slow motion. For a cinematic accelerate-then-decelerate, apply a speed ramp. Audio is pitch-corrected, and captions, zooms, and music beds stay in sync automatically.

On this page: constant speed · ramps · slow motion · sync · where & when · impact · FAQ

How to set a segment to 2× (constant speed)

What it does: plays a chosen segment faster (or slower). At 2×, that segment’s duration halves in the export.

Figure: ① set the speed, ② 2× halves the segment, ③ a ramp eases speed in and out (audio pitch-corrected).

1. Cut at the start and end of the segment to speed up (press B at each — chapter 9).
2. Select the segment (A mode).
3. Set its speed with the 1× ▾ control in the transport (choose 2×).
4. The segment plays faster; the project duration updates.

Use it for: fast-forwarding installs, builds, long form-fills — anything where “and now we wait” kills pacing. 4×–8× over a progress bar reads as “this just works.”

How to add a speed ramp

What it does: smoothly accelerates and decelerates across a segment instead of a hard speed jump — cinematic, used in highlight reels.

1. Select the segment.
2. Apply a ramp speed profile (a curve, not a single multiplier).
3. The segment eases from slow into fast and back. Audio is pitch-corrected so sped-up speech doesn’t chipmunk.

How to create slow motion

Set a speed below 1× (e.g. 0.5×) to stretch a moment — linger on a result or a reveal. Combine with a ramp for a dramatic slow-down into a key frame.

Does everything stay in sync under speed?

Yes — and this is the hard part Zella handles for you:

• Captions land at the speed-scaled time (a caption at 6.0s in a 2× segment maps to its correct new position).
• Zoom blocks and keyframes are remapped, so emphasis still hits the right moment.
• Music beds play at their natural rate even under a sped segment — your background music doesn’t chipmunk.

You don’t manage any of this manually; apply the speed and timed elements follow.

Where and when to use speed

• Where: setup tutorials (compress installs/builds), demos (fast-forward slow tasks), reels (energy via quick ramps), reveals (slow-mo into the payoff).
• When: after removing silences, to compress the remaining slow action (not dead air). Ramp into the “it works” moment.

What impact speed changes have

For content creators and video editors, speed is a pacing multiplier:

• Higher retention — compressing the boring parts (installs, loading, repetitive typing) keeps viewers from dropping off during dead stretches.
• Cinematic energy — ramps add the slick accelerate/decelerate feel of professional highlight edits without an external app.
• Shorter, denser videos — a 3-minute tutorial becomes a 90-second one that says the same thing, which performs better on every platform.

Speed FAQ

How do I speed up part of a video on a Mac? Cut the segment, select it, and set 2× (or higher) with the 1× ▾ control in the transport.

Does speeding up the video chipmunk the audio? No — audio is pitch-corrected, including across ramps.

What’s a speed ramp? A smooth accelerate-then-decelerate across a segment, instead of a constant multiplier.

Will my captions and music stay in sync if I speed up the video? Yes — captions and zooms remap to the new timing; music beds keep their natural rate.

How do I make slow motion? Set a speed below 1× (e.g. 0.5×) on the segment.

Pro tips & gotchas

• Use a constant speed for simple fast-forwards; use a ramp to accelerate/decelerate smoothly.
• Captions, zooms, keyframes, and music all remap under speed changes — they stay in sync automatically.
• Speeding up long “thinking” gaps is the fastest way to tighten a tutorial without cutting content.
• Music beds play at their natural rate even when the video is sped up, so the track doesn’t chipmunk.

Related: Timeline editing → · AI cleanup → · Zoom & keyframes → · Audio →