Video Speed and Pitch Changer

【Next-Gen Video Pitch & Speed Editor】
A powerful video speed changer, pitch shifter, and voice changer — control your video's playback speed and pitch independently, smoothly, and in real time, without sacrificing audio quality.
Set AB Repeat / AB Loop points and trim & export just that section, instantly, in either Playback or Edit Mode, with or without video.
Create smooth slow-motion effects, shift your voice pitch, or time-stretch audio for a perfect tempo change.
A high-performance audio/video speed editor powered by cutting-edge signal processing, letting you separately control, edit, and export video speed and pitch, independently of each other.
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【Key Features】
① Playback Mode — Real-time Preview & Quick Export
Adjust pitch, speed, and formant instantly while watching your video. What you hear is what you get.
* Slow down a video without changing the pitch (great for transcription or learning) — a true slow motion video player.
* Shift the pitch up or down without altering the speed (perfect for changing musical keys or a natural voice changer effect).
* Speed up videos without changing the pitch (for fast listening and time-saving).
* Free Formant Shift (NEW): Uncheck Formant Keep to move the formant slider freely, even during live playback, hearing the voice character change in real time like a true voice changer.
* AB Repeat: Loop any A–B section for focused practice or listening.
* Export instantly in MP4, with your adjustments saved exactly as heard during playback.
② Edit Mode — Timeline Control & High-Quality Export
Place "control points" on the video timeline to create advanced, time-varying pitch and speed changes, like a professional time-stretch editor.
* Smooth Transitions: specify the exact duration (seconds) for speed or pitch to gradually accelerate, decelerate, rise, or fall — no sudden, choppy jumps.
* Formant Keep (ON/OFF): Keep the natural vocal character when shifting pitch, or uncheck it to freely control the formant slider yourself, from subtle tweaks to a classic retro tape-stretch effect.
* High-Quality C++ Phase Vocoder: Even with extreme pitch or speed changes, audio degradation is suppressed to the limit, keeping sound crystal clear.
* Microtonal Pitch Adjustment: Long-press the pitch label for 5-cent step precision, ideal for out-of-tune vintage recordings.
* Audio-Only Export: Long-press Export to save just the audio track, with all changes baked in, no video needed.
③ Instant Access
Share a video from your Gallery, Files app, or any other app — this editor opens directly, ready to edit immediately, no manual browsing required.
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【Perfect For】
* Musicians & Transcribers — Slow down fast phrases to copy fingering and phrasing, then speed back up to verify, without changing pitch.
* Performers & Content Creators — Record a practice run in slow motion, then export at full speed for a seamless, shareable video.
* Dancers & Athletes — Smoothly slow down crucial moments to analyze form and movement.
* Karaoke Lovers — Shift the key of any video to match your vocal range without changing the tempo.
* Language Learners — Adjust playback speed and vocal pitch for better listening comprehension at your own pace.
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【Ad-Free Option】
A brief ad appears only when loading a file. A one-time purchase removes all ads permanently. Every feature remains fully available to all users, with or without purchase.
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【100% Local Processing — Complete Privacy】
All processing happens entirely on your device. Your videos are never uploaded to any server, ensuring complete privacy for your creative work.
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【Credits】
App icon beautifully designed by Mostafiz — thank you!
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【Open Source Software (OSS) Used】
■ Android Jetpack & Material Components (Google) — Apache License 2.0
■ Google Media3 (ExoPlayer & Transformer) — Apache License 2.0
■ KISS FFT — Copyright (c) 2003-2010 Mark Borgerding. All rights reserved. — BSD 3-Clause License