VBooster is the app for changing playback speed and saving to your camera roll.
-- Playback speed --
You can change playback speed from x0.1 to x10.0 by 0.1 steps.
-- Sound types --
You can choose 3 types of sounds.
1. Change pitch by speed
2. Keep pitch type A
3. Keep pitch type B
-- Music --
You can add songs as Background music.
-- Music speed --
You can choose 2 types of speed.
1. Up to speed of video
2. Original speed
Q.Witch types are better " Keep pitch type A" or "B"?
A.Depends on of the sound of the video. So please try both to find the better one.