android - How to mux audio file and video file?

Question

i have a 3gp file that is recorded from the microphone and a mp4 video file. i want to mux audio file and video file in to a mp4 file and save it. i searched a lot but didn't find any thing helpful for using MediaMuxer api of android. MediaMuxer api

UPDATE : this is my method that mux two files , i have an Exception in it. and the reason is that the destination mp4 file doesn't have any track! can someOne help me with adding audio and video track to muxer??

Exception

java.lang.IllegalStateException: Failed to stop the muxer

my code:

private void cloneMediaUsingMuxer( String dstMediaPath) throws IOException {
    // Set up MediaExtractor to read from the source.
    MediaExtractor soundExtractor = new MediaExtractor();
    soundExtractor.setDataSource(audioFilePath);
    MediaExtractor videoExtractor = new MediaExtractor();
    AssetFileDescriptor afd2 = getAssets().openFd("Produce.MP4");
    videoExtractor.setDataSource(afd2.getFileDescriptor() , afd2.getStartOffset(),afd2.getLength());


    //PATH
    //extractor.setDataSource();
    int trackCount = soundExtractor.getTrackCount();
    int trackCount2 = soundExtractor.getTrackCount();

    //assertEquals("wrong number of tracks", expectedTrackCount, trackCount);
    // Set up MediaMuxer for the destination.
    MediaMuxer muxer;
    muxer = new MediaMuxer(dstMediaPath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
    // Set up the tracks.
    HashMap<Integer, Integer> indexMap = new HashMap<Integer, Integer>(trackCount);
    for (int i = 0; i < trackCount; i++) {
        soundExtractor.selectTrack(i);
        MediaFormat SoundFormat = soundExtractor.getTrackFormat(i);
        int dstIndex = muxer.addTrack(SoundFormat);
        indexMap.put(i, dstIndex);
    }

    HashMap<Integer, Integer> indexMap2 = new HashMap<Integer, Integer>(trackCount2);
    for (int i = 0; i < trackCount2; i++) {
        videoExtractor.selectTrack(i);
        MediaFormat videoFormat = videoExtractor.getTrackFormat(i);
        int dstIndex2 = muxer.addTrack(videoFormat);
        indexMap.put(i, dstIndex2);
    }


    // Copy the samples from MediaExtractor to MediaMuxer.
    boolean sawEOS = false;
    int bufferSize = MAX_SAMPLE_SIZE;
    int frameCount = 0;
    int offset = 100;
    ByteBuffer dstBuf = ByteBuffer.allocate(bufferSize);
    MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
    MediaCodec.BufferInfo bufferInfo2 = new MediaCodec.BufferInfo();

    muxer.start();
    while (!sawEOS) {
        bufferInfo.offset = offset;
        bufferInfo.size = soundExtractor.readSampleData(dstBuf, offset);
        bufferInfo2.offset = offset;
        bufferInfo2.size = videoExtractor.readSampleData(dstBuf, offset);

        if (bufferInfo.size < 0) {
            sawEOS = true;
            bufferInfo.size = 0;
            bufferInfo2.size = 0;
        }else if(bufferInfo2.size < 0){
            sawEOS = true;
            bufferInfo.size = 0;
            bufferInfo2.size = 0;
        }
        else {
            bufferInfo.presentationTimeUs = soundExtractor.getSampleTime();
            bufferInfo2.presentationTimeUs = videoExtractor.getSampleTime();
            //bufferInfo.flags = extractor.getSampleFlags();
            int trackIndex = soundExtractor.getSampleTrackIndex();
            int trackIndex2 = videoExtractor.getSampleTrackIndex();
            muxer.writeSampleData(indexMap.get(trackIndex), dstBuf,
                    bufferInfo);

            soundExtractor.advance();
            videoExtractor.advance();
            frameCount++;

        }
    }

    Toast.makeText(getApplicationContext(),"f:"+frameCount,Toast.LENGTH_SHORT).show();

    muxer.stop();
    muxer.release();

}

UPDATE 2: problem solved! check my answer to my question.

thanks for your help

Answer 1

I had some problem with tracks of audio and video files. they gone and every thing is ok with my code , but Now you can use it for merging an audio file and a video file together.

Code:

private void muxing() {

String outputFile = "";

try {

    File file = new File(Environment.getExternalStorageDirectory() + File.separator + "final2.mp4");
    file.createNewFile();
    outputFile = file.getAbsolutePath();

    MediaExtractor videoExtractor = new MediaExtractor();
    AssetFileDescriptor afdd = getAssets().openFd("Produce.MP4");
    videoExtractor.setDataSource(afdd.getFileDescriptor() ,afdd.getStartOffset(),afdd.getLength());

    MediaExtractor audioExtractor = new MediaExtractor();
    audioExtractor.setDataSource(audioFilePath);

    Log.d(TAG, "Video Extractor Track Count " + videoExtractor.getTrackCount() );
    Log.d(TAG, "Audio Extractor Track Count " + audioExtractor.getTrackCount() );

    MediaMuxer muxer = new MediaMuxer(outputFile, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);

    videoExtractor.selectTrack(0);
    MediaFormat videoFormat = videoExtractor.getTrackFormat(0);
    int videoTrack = muxer.addTrack(videoFormat);

    audioExtractor.selectTrack(0);
    MediaFormat audioFormat = audioExtractor.getTrackFormat(0);
    int audioTrack = muxer.addTrack(audioFormat);

    Log.d(TAG, "Video Format " + videoFormat.toString() );
    Log.d(TAG, "Audio Format " + audioFormat.toString() );

    boolean sawEOS = false;
    int frameCount = 0;
    int offset = 100;
    int sampleSize = 256 * 1024;
    ByteBuffer videoBuf = ByteBuffer.allocate(sampleSize);
    ByteBuffer audioBuf = ByteBuffer.allocate(sampleSize);
    MediaCodec.BufferInfo videoBufferInfo = new MediaCodec.BufferInfo();
    MediaCodec.BufferInfo audioBufferInfo = new MediaCodec.BufferInfo();


    videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
    audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);

    muxer.start();

    while (!sawEOS)
    {
        videoBufferInfo.offset = offset;
        videoBufferInfo.size = videoExtractor.readSampleData(videoBuf, offset);


        if (videoBufferInfo.size < 0 || audioBufferInfo.size < 0)
        {
            Log.d(TAG, "saw input EOS.");
            sawEOS = true;
            videoBufferInfo.size = 0;

        }
        else
        {
            videoBufferInfo.presentationTimeUs = videoExtractor.getSampleTime();
            videoBufferInfo.flags = videoExtractor.getSampleFlags();
            muxer.writeSampleData(videoTrack, videoBuf, videoBufferInfo);
            videoExtractor.advance();


            frameCount++;
            Log.d(TAG, "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs +" Flags:" + videoBufferInfo.flags +" Size(KB) " + videoBufferInfo.size / 1024);
            Log.d(TAG, "Frame (" + frameCount + ") Audio PresentationTimeUs:" + audioBufferInfo.presentationTimeUs +" Flags:" + audioBufferInfo.flags +" Size(KB) " + audioBufferInfo.size / 1024);

        }
    }

    Toast.makeText(getApplicationContext() , "frame:" + frameCount , Toast.LENGTH_SHORT).show();



    boolean sawEOS2 = false;
    int frameCount2 =0;
    while (!sawEOS2)
    {
        frameCount2++;

        audioBufferInfo.offset = offset;
        audioBufferInfo.size = audioExtractor.readSampleData(audioBuf, offset);

        if (videoBufferInfo.size < 0 || audioBufferInfo.size < 0)
        {
            Log.d(TAG, "saw input EOS.");
            sawEOS2 = true;
            audioBufferInfo.size = 0;
        }
        else
        {
            audioBufferInfo.presentationTimeUs = audioExtractor.getSampleTime();
            audioBufferInfo.flags = audioExtractor.getSampleFlags();
            muxer.writeSampleData(audioTrack, audioBuf, audioBufferInfo);
            audioExtractor.advance();


            Log.d(TAG, "Frame (" + frameCount + ") Video PresentationTimeUs:" + videoBufferInfo.presentationTimeUs +" Flags:" + videoBufferInfo.flags +" Size(KB) " + videoBufferInfo.size / 1024);
            Log.d(TAG, "Frame (" + frameCount + ") Audio PresentationTimeUs:" + audioBufferInfo.presentationTimeUs +" Flags:" + audioBufferInfo.flags +" Size(KB) " + audioBufferInfo.size / 1024);

        }
    }

    Toast.makeText(getApplicationContext() , "frame:" + frameCount2 , Toast.LENGTH_SHORT).show();

    muxer.stop();
    muxer.release();


} catch (IOException e) {
    Log.d(TAG, "Mixer Error 1 " + e.getMessage());
} catch (Exception e) {
    Log.d(TAG, "Mixer Error 2 " + e.getMessage());
}

}

thanks to these sample codes:MediaMuxer Sample Codes-really perfect