问题
I am using the MP4ParserMergeAudioVideo to add a new audio to an MP4
file. The library had said to use .wav
file, if i keep a .wav
file in the directory and give the name of the audiofile as example.m4a
, I get a file not found exception. So I changed the file to a .m4a
audio file. The code is given below.
findViewById(R.id.append).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String root = Environment.getExternalStorageDirectory().toString();
Log.e("",""+root);
String audio = root + "/download/"+"mymovieaudio.m4a";
String video = root + "/download/"+"My_Movie.mp4";
String output = root + "/download/ouput.mp4";
mux(video, audio, output);
}
});
The mux function is like this
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();
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;
}
I successfully get the output.mp4
file in my download directory of my device. The problem is that it does not have any audio. Please help. Thanks in advance.
来源:https://stackoverflow.com/questions/30230709/no-audio-in-mp4-file-android