Choose the source
Open one compatible video or audio file and select Speed Control from the available tools.
Speed Control · Video + Audio
Speed up or slow down the whole clip—or just one part.
Use ClipFlow with a video or audio source, choose an overall or local speed change, and preview the new timing before creating the result.
From one tenth to sixteen times
How to change video or audio speed on iPhone.
Slow a moment down, accelerate a long process, or change only a selected section while the rest stays at normal speed.
Set the affected range
Use Overall for the complete source, or Local to mark the exact start and end of one section.
Select and review the speed
Pick a supported preset, check the expected duration, and create the video or audio result.
Ten speed presets for different jobs
ClipFlow offers 0.1×, 0.25×, 0.5×, and 0.75× slow-motion choices, plus 1.25×, 1.5×, 2×, 4×, 8×, and 16× faster playback. A local edit keeps the footage before and after the selected range at 1×.
Very short video ranges may not offer the highest speed settings when the result would contain too few frames. A video source produces a video result, while an audio-only source produces audio. Core speed processing runs on your device and does not require ClipFlow Pro.
Related ClipFlow guides
Change the pace, not the workflow.
Make the full recording or one selected moment faster or slower in a focused tool.