First of all open camera and capture 10 second video after open next activity and list of audio file then click the audio file this time merge the audio and video but in this my code getting error when select audio in storage.
Activity
import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.MediaController;
import android.widget.VideoView;
import com.coremedia.iso.boxes.Container;
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.wos.capturevideowithaudio.R;
import com.wos.capturevideowithaudio.adapter.AudioListAdapter;
import com.wos.capturevideowithaudio.utils.Constant;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.BufferOverflowException;
import java.nio.ByteBuffer;
import java.nio.channels.WritableByteChannel;
import java.util.ArrayList;
public class AudioMixing extends AppCompatActivity {
private ArrayList<String> audio;
private VideoView mVideoView;
private RecyclerView rvAudioFile;
private AudioListAdapter audioListAdapter;
private String musicUri, timeStamp;
private String[] array_spinnerLoad, files;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_audiomixing);
initView();
}
private void initView() {
rvAudioFile = (RecyclerView) findViewById(R.id.rvAudioFile);
mVideoView = (VideoView) findViewById(R.id.video_view);
//Display Current Capture Video
Bundle bundle = getIntent().getExtras();
if (bundle != null) {
timeStamp = bundle.getString("timeStamp");
musicUri = bundle.getString("uri");
mVideoView.setVideoURI(Uri.parse(musicUri));
mVideoView.setMediaController(new MediaController(this));
mVideoView.requestFocus();
mVideoView.start();
}
//Get All AudioList in Mobile Phone
audio = new ArrayList<>();
String path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getAbsolutePath();
File sd = new File(path);
File[] sdDirList = sd.listFiles();
if (sdDirList != null) {
array_spinnerLoad = new String[sdDirList.length];
files = new String[sdDirList.length];
for (int i = 0; i < sdDirList.length; i++) {
array_spinnerLoad[i] = sdDirList[i].getName();
Log.d(Constant.TAG, "getAudioName = " + sdDirList[i].getName());
files[i] = sdDirList[i].getAbsolutePath();
Log.d(Constant.TAG, "getAudioName = " + sdDirList[i].getAbsolutePath());
}
audioListAdapter = new AudioListAdapter(getApplicationContext(), array_spinnerLoad);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getApplicationContext());
rvAudioFile.setLayoutManager(layoutManager);
rvAudioFile.setAdapter(audioListAdapter);
audioListAdapter.OnItemClickListener(new AudioListAdapter.OnItemClickListener() {
@Override
public void onItemClick(View view, int position) {
String fileName = array_spinnerLoad[position];
String filePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getAbsolutePath() + "/" + fileName;
MediaPlayer mediaPlayer = new MediaPlayer();
try {
FileInputStream is = new FileInputStream(filePath);
mediaPlayer.setDataSource(is.getFD());
mediaPlayer.prepare();
} catch (IOException e) {
e.printStackTrace();
}
mediaPlayer.start();
String root = Environment.getExternalStorageDirectory().toString();
String audio = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC).getAbsolutePath() + "/" + fileName;
File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES), "HelloCamera");
String video = mediaStorageDir.getPath() + File.separator + "VID_" + timeStamp + ".mp4";
String output = root + "/" + "jd.mp4";
Log.e(Constant.TAG, "audio:" + audio + " video:" + video + " out:" + output);
mux(video, audio, output);
}
});
}
}
public boolean mux(String videoFile, String audioFile, String outputFile) {
Movie video;
try {
video = new MovieCreator().build(videoFile);
} catch (RuntimeException e) {
e.printStackTrace();
return false;
} catch (IOException e) {
e.printStackTrace();
return false;
}
Movie audio;
try {
audio = new MovieCreator().build(audioFile);
} catch (IOException e) {
e.printStackTrace();
return false;
} catch (NullPointerException e) {
e.printStackTrace();//In this Line Error java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.googlecode.mp4parser.BasicContainer.getBoxes
return false;
}
Track audioTrack = audio.getTracks().get(0);
video.addTrack(audioTrack);
Container out = new DefaultMp4Builder().build(video);
FileOutputStream fos;
try {
fos = new FileOutputStream(outputFile);
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
}
BufferedWritableFileByteChannel byteBufferByteChannel = new BufferedWritableFileByteChannel(fos);
try {
out.writeContainer(byteBufferByteChannel);
byteBufferByteChannel.close();
fos.close();
} catch (IOException e) {
e.printStackTrace();
return false;
}
return true;
}
private static class BufferedWritableFileByteChannel implements WritableByteChannel {
private static final int BUFFER_CAPACITY = 1000000;
private boolean isOpen = true;
private final OutputStream outputStream;
private final ByteBuffer byteBuffer;
private final byte[] rawBuffer = new byte[BUFFER_CAPACITY];
private BufferedWritableFileByteChannel(OutputStream outputStream) {
this.outputStream = outputStream;
this.byteBuffer = ByteBuffer.wrap(rawBuffer);
}
@Override
public int write(ByteBuffer inputBuffer) throws IOException {
int inputBytes = inputBuffer.remaining();
if (inputBytes > byteBuffer.remaining()) {
dumpToFile();
byteBuffer.clear();
if (inputBytes > byteBuffer.remaining()) {
throw new BufferOverflowException();
}
}
byteBuffer.put(inputBuffer);
return inputBytes;
}
@Override
public boolean isOpen() {
return isOpen;
}
@Override
public void close() throws IOException {
dumpToFile();
isOpen = false;
}
private void dumpToFile() {
try {
outputStream.write(rawBuffer, 0, byteBuffer.position());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
}
Error
Process: com.wos.capturevideowithaudio, PID: 7162
java.lang.NullPointerException: Attempt to invoke virtual method 'java.util.List com.googlecode.mp4parser.BasicContainer.getBoxes(java.lang.Class)' on a null object reference
at com.googlecode.mp4parser.authoring.container.mp4.MovieCreator.build(MovieCreator.java:48)
at com.googlecode.mp4parser.authoring.container.mp4.MovieCreator.build(MovieCreator.java:35)
at com.wos.capturevideowithaudio.activity.AudioMixing.appendTwoVideo(AudioMixing.java:154)
at com.wos.capturevideowithaudio.activity.AudioMixing$1.onItemClick(AudioMixing.java:142)
at com.wos.capturevideowithaudio.adapter.AudioListAdapter$ViewHolder.onClick(AudioListAdapter.java:60)
at android.view.View.performClick(View.java:5612)
at android.view.View$PerformClick.run(View.java:22285)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6123)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:757)
