Video Speed Changer with Frame-Precise Control

The tool supports speeds from 0.1x (extreme slow motion) to 16x (fast timelapse). Use the logarithmic slider or type an exact value.

When enabled, audio pitch stays natural regardless of speed — no chipmunk effect at high speed or deep voice at low speed. This uses advanced audio time-stretching.

Presets split your video into segments with predefined speeds. For example, Bullet Time creates a dramatic slow-motion moment (0.1x) in the middle, with normal speed before and after.

Yes. Switch to Segments mode and use presets or manually split the video at any point. Each segment has its own speed control.

Video is re-encoded to apply speed changes, but you can choose the quality level. High quality (CRF 17) is visually indistinguishable from the original.

Yes. In uniform mode there is a reverse switch that applies to the whole clip alongside the speed setting; in segment mode each segment carries its own speed and its own reverse, which is how you build the common effect of a normal run-up, a slow reversed middle and a normal end. Two things to keep in mind. Slowing below about half speed shows every frame twice and the motion starts to judder unless the source was shot at a high frame rate. And audio does not survive a reverse in any useful form — reversed speech is unusable and reversed music is a different piece — so plan on muting the reversed part and laying sound over it.