How to concat or merge two or more video files in Android?

Question

I want to merge two or more video files (they may be two mp4 or two 3gp, or any other format).

Answer 1

I will share both Java & Kotlin Code

Internally it uses FFmpeg but its lightweight.The easiest way to Add two videos of different types or codec, framerate, and bitrate is to use EpMedia librabry.

Grade Dependency

implementation 'com.github.yangjie10930:EpMedia:v0.9.5'

Kotlin Code

    val epVideos = ArrayList()
    epVideos.add(EpVideo("/storage/emulated/0/Contact/1.mp4")) // Video 1 Example
    epVideos.add(EpVideo("/storage/emulated/0/Contact/2.mp4")) // Video 2 Exmaple
    val outputOption = EpEditor.OutputOption ("/storage/emulated/0/merge.mp4"); //Output
    outputOption.setWidth(720) // output video width, default 480
    outputOption.setHeight(1280)
    outputOption.frameRate =  25 ; // output video frame rate, default 30

    EpEditor.merge(epVideos,outputOption,object:OnEditorListener{
        override fun onSuccess() {

        }

        override fun onFailure() {

        }


        override fun onProgress(progress: Float) {
            Log.d("Progress","$progress")
        }

    })

Java Code

 private void mergeVideos() {
    ArrayList epVideos =  new  ArrayList<>();
    epVideos.add(new EpVideo (file2)); // Video 1
    epVideos.add(new EpVideo (file1)); // Video 2
    EpEditor. OutputOption outputOption =new EpEditor.OutputOption(fileOutput);
    outputOption.setWidth(720);
    outputOption.setHeight(1280);
    outputOption.frameRate = 25 ;
    outputOption.bitRate = 10 ;
    EpEditor.merge(epVideos, outputOption, new  OnEditorListener() {
        @Override
        public  void  onSuccess () {
            Log.d("Status","Success");

        }

        @Override
        public  void  onFailure () {

        }

        @Override
        public  void  onProgress ( float  progress ) {
            // Get processing progress here
            Log.d("Progress",""+progress);
        }
    });

}