How to merge two or more mp3 audio file in android?

Question

I\'m trying to merge mp3 audio files But not successful.

Here is my code.

public static void meargeAudio(List filesToMearge)
{


    whi         


        

Answer 1

I also struggled with that and solved it using mp4parser

import com.googlecode.mp4parser.authoring.Movie;
import com.googlecode.mp4parser.authoring.Track;
import com.googlecode.mp4parser.authoring.builder.DefaultMp4Builder;
import com.googlecode.mp4parser.authoring.container.mp4.MovieCreator;
import com.googlecode.mp4parser.authoring.tracks.AppendTrack;

For your case, I believe something like this should work:

public static void mergeAudio(List<File> filesToMerge) {

    String output = Environment.getExternalStorageDirectory().getAbsolutePath() + "output.mp3";

    while (filesToMerge.size()!=1){

        try {

            String[] videoUris = new String[]{
                filesToMerge.get(0).getPath(),
                filesToMerge.get(0).getPath()
            };

            List<Track> videoTracks = new LinkedList<Track>();
            List<Track> audioTracks = new LinkedList<Track>();

            for (Movie m : inMovies) {
                for (Track t : m.getTracks()) {
                    if (t.getHandler().equals("soun")) {
                        audioTracks.add(t);
                    }
                    if (t.getHandler().equals("vide")) {
                        videoTracks.add(t);
                    }
                }
            }

            Movie result = new Movie();

            if (!audioTracks.isEmpty()) {
                result.addTrack(new AppendTrack(audioTracks.toArray(new Track[audioTracks.size()])));
            }
            if (!videoTracks.isEmpty()) {
                result.addTrack(new AppendTrack(videoTracks.toArray(new Track[videoTracks.size()])));
            }

            Container out = new DefaultMp4Builder().build(result);

            FileChannel fc = new RandomAccessFile(output, "rw").getChannel();
            out.writeContainer(fc);
            fc.close();

        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

There are a few answers suggesting that, such as:

• Merging 2 audio files sequentially in android?
• Concatenate two audio files and play resulting file

Answer 2

It is too late. But still, someone might need a proper solution. That is why I am suggesting using AudioMixer-android library.

Answer 3

String wavFile1 = android.os.Environment.getExternalStorageDirectory()+"/Download/a.mp4"; String wavFile2 = android.os.Environment.getExternalStorageDirectory()+"/Download/b.mp4"; FileInputStream fistream1 = null; // first source file try { fistream1 = new FileInputStream(wavFile1); FileInputStream fistream2 = new FileInputStream(wavFile2);//second source file SequenceInputStream sistream = new SequenceInputStream(fistream1, fistream2); FileOutputStream fostream = new FileOutputStream(android.os.Environment.getExternalStorageDirectory()+"/Download/merge1.mp4");//destinationfile

        int temp;

        while( ( temp = sistream.read() ) != -1)
        {
            // System.out.print( (char) temp ); // to print at DOS prompt
            fostream.write(temp);   // to write to file
        }
        Log.e("Result","Done");

        fostream.close();
        sistream.close();
        fistream1.close();
        fistream2.close();

        Toast.makeText(this, "Done", Toast.LENGTH_SHORT).show();
    }
    catch (FileNotFoundException e) {
        e.printStackTrace();
        Log.e("Not",e+"");
        Toast.makeText(this, "File not Found", Toast.LENGTH_SHORT).show();
    }
    catch (IOException e)
    {
        Toast.makeText(this, ""+e, Toast.LENGTH_SHORT).show();
    }

Answer 4

Well there's a function to merge Audio or Video files

public static boolean mergeMediaFiles(boolean isAudio, String sourceFiles[], String targetFile) {
        try {
            String mediaKey = isAudio ? "soun" : "vide";
            List<Movie> listMovies = new ArrayList<>();
            for (String filename : sourceFiles) {
                listMovies.add(MovieCreator.build(filename));
            }
            List<Track> listTracks = new LinkedList<>();
            for (Movie movie : listMovies) {
                for (Track track : movie.getTracks()) {
                    if (track.getHandler().equals(mediaKey)) {
                        listTracks.add(track);
                    }
                }
            }
            Movie outputMovie = new Movie();
            if (!listTracks.isEmpty()) {
                outputMovie.addTrack(new AppendTrack(listTracks.toArray(new Track[listTracks.size()])));
            }
            Container container = new DefaultMp4Builder().build(outputMovie);
            FileChannel fileChannel = new RandomAccessFile(String.format(targetFile), "rws").getChannel();
            container.writeContainer(fileChannel);
            fileChannel.close();
            return true;
        }
        catch (IOException e) {
            Log.e("MYTAG", "Error merging media files. exception: "+e.getMessage());
            return false;
        }
    }

• If you got Audios, isAudio should be true. if you got videos isAudio should be false

• sourceFiles[] array should contain the destinations of the media files such as

  /sdcard/my_songs/audio_1, /sdcard/my_songs/audio_2, /sdcard/my_songs/audio_3

• targetFile is your final audio merged file should be somthing like

  /sdcard/my_songs/final_audio_1

• If you deal with large files it's preferred to merge file in background, you can use AsynkTask