Warning: this is not maintained anymore. It's a fork of another library that I've found: https://github.com/titansgroup/k4l-video-trimmer

You are free to send pull requests if you think they are good, though.

VideoTrimmer

Allows to trim videos on Android, including UI.

import using Jitpack :

allprojects {
	repositories {
		...
		maven { url 'https://jitpack.io' }
	}
}

dependencies {
        implementation 'com.github.AndroidDeveloperLB:VideoTrimmer:#'
}

• Code based on "k4l-video-trimmer" library, to handle various issues on it, that I've asked about here and [here] .
• Trimming is done by using "mp4parser" library (that was used on the original library) and on this answer, which is based on the Gallery app of Android.
• This library handled various issues that the original had, while also having 100% code in Kotlin.
• At first it was a fork, but as it became very different in code, and because the original one isn't maintained anymore, I decided to create this one as a new repository.