android 音频视频合并

1. 生成mp4 audio

通过录音 生成mp4 audio

// -----------------sound process
private void startRecording() {

    isRecording = true;

    //mFileName = "/sdcard/dyesebelRecord.mp3";
    mFileName = "/sdcard/hopeaudio.mp4";

    mRecorder = new MediaRecorder();
    mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    mRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    mRecorder.setOutputFile(mFileName);
    mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);

    try {
        mRecorder.prepare();
    } catch (IOException e) {

    }

    mRecorder.start();
}

2. 合并mp4 video

通过第三方jar包, 将mp4 audio 和 mp4 视频 文件 合并成一个新的视频文件。

ps: 需要添加isoparser-1.0.1.jar, aspectjrt.jar

private void mux() throws IOException
{
     System.out.println("isoparser mux3");
        String audioEnglish = "/sdcard/hopeaudio.mp4";
        String video = "/sdcard/hopevideo.mp4";


        Movie countVideo = MovieCreator.build(video);
        Movie countAudioEnglish = MovieCreator.build(audioEnglish);


        Track audioTrackEnglish = countAudioEnglish.getTracks().get(0);

        countVideo.addTrack(audioTrackEnglish);

        {
            Container out = new DefaultMp4Builder().build(countVideo);
            FileOutputStream fos = new FileOutputStream(new File("/sdcard/hope.mp4"));
            out.writeContainer(fos.getChannel());
            fos.close();
        }
}