Преобразование PCM в AAC с использованием mediacodec

Я использую класс медиакодека в Android (Jelly Bean) для кодирования формата PCM в AAC. Файл был закодирован, но музыкальный проигрыватель не смог воспроизвести этот файл. Я не смог найти какой-либо рабочий код или соответствующую документацию в сети.

Это мой код:

public void doConvert()
{

    new AsyncTask<Void, Void, Void>()
    {

        @Override
        protected Void doInBackground(Void... params) 
        {
            try
            {
                int codecCount = MediaCodecList.getCodecCount();

                for ( int i=0; i < codecCount; i++)
                {
                    MediaCodecInfo info = MediaCodecList.getCodecInfoAt(i);
                    Logger.getLogger(MainActivity.class.getSimpleName()).log(Level.INFO, info.getName());
                    for ( String type : info.getSupportedTypes() )
                    {
                        Logger.getLogger(MainActivity.class.getSimpleName()).log(Level.INFO, type);
                    }

                }

                File inputFile = new File( Environment.getExternalStorageDirectory().getAbsolutePath()+"/Download/Ghajini27_Mono_8Khz.wav");
                //File inputFile = new File( sampleFD.get);
                Log.e("File", String.valueOf(inputFile.length()));
                FileInputStream fis = new FileInputStream(inputFile);
                fis.skip(44);//remove wav header

                File outputFile = new File( Environment.getExternalStorageDirectory().getAbsolutePath()+"/Download/out.m4a");
                if ( outputFile.exists()) outputFile.delete();

                FileOutputStream fos = new FileOutputStream(outputFile);

                //BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(outputFile));
                MediaCodec codec = MediaCodec.createEncoderByType("audio/mp4a-latm");
                MediaFormat outputFormat = MediaFormat.createAudioFormat("audio/mp4a-latm", 22050, 1);
                outputFormat.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
             //  outputFormat.setInteger(MediaFormat.KEY_CHANNEL_MASK, AudioFormat.CHANNEL_CONFIGURATION_MONO);
                outputFormat.setInteger(MediaFormat.KEY_BIT_RATE, 22050  );
                outputFormat.setInteger(MediaFormat.KEY_CHANNEL_COUNT, 1);
                //outputFormat.setLong(MediaFormat.KEY_MAX_INPUT_SIZE, inputFile.length());
                double durationInMs = (inputFile.length()/16000)*1000;
                Log.e("duration",String.valueOf((long)durationInMs));
                outputFormat.setLong(MediaFormat.KEY_DURATION, (long)durationInMs );


                codec.configure(outputFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE );
                codec.start();

                ByteBuffer[] inputBuffers = codec.getInputBuffers();
                ByteBuffer[] outputBuffer = codec.getOutputBuffers();

                boolean hasMoreData = true;   
                MediaCodec.BufferInfo outBuffInfo = new BufferInfo();
                byte readBuffer[] = new byte[48000];
                byte writeBuffer[] = new byte[48000];

                do
                {
                   int nextBuffer = codec.dequeueInputBuffer(5000);
                   Log.e("NextBuffer","nextInputBuffer = "+nextBuffer);

                    if ( nextBuffer >= 0 )
                    {



                        ByteBuffer inBuf = inputBuffers[nextBuffer];
                        inBuf.clear();
                        int bytesRead = fis.read( readBuffer,0, inBuf.capacity() );

                        Log.e("bytesread","Read = "+bytesRead);

                        if ( bytesRead < inBuf.capacity() )
                        {
                            hasMoreData = false;
                        }

                        inBuf.put(readBuffer, 0, bytesRead);

                        codec.queueInputBuffer(nextBuffer, 0, bytesRead, 0, hasMoreData?0:MediaCodec.BUFFER_FLAG_END_OF_STREAM);
                    }


                    int outputBufferIndex = codec.dequeueOutputBuffer( outBuffInfo, 3000);
                /*    logger.log(Level.INFO,"nextOutputBuffer = "+outputBufferIndex);
                    logger.log(Level.INFO,"outBuffInfo offset = "+outBuffInfo.offset);
                    logger.log(Level.INFO,"outBuffInfo size = "+outBuffInfo.size);
                    logger.log(Level.INFO,"outBuffInfo flags = "+outBuffInfo.flags);*/


                    //while ( outputBufferIndex > -1 )
                    //{ 

                        outputBuffer[outputBufferIndex].position(outBuffInfo.offset);
                        outputBuffer[outputBufferIndex].get(writeBuffer,0,outBuffInfo.size);

                        fos.write(writeBuffer,0, outBuffInfo.size);
                      //  logger.log(Level.INFO,"Writing = "+outBuffInfo.size+" bytes");


                        outputBuffer[outputBufferIndex].clear();

                        codec.releaseOutputBuffer(outputBufferIndex, false);

                        if ( outBuffInfo.flags == MediaCodec.BUFFER_FLAG_END_OF_STREAM )
                        {
                            codec.flush();
                            codec.stop();
                            codec.release();
                            break;
                        }

                        //outputBufferIndex = codec.dequeueOutputBuffer( outBuffInfo, 1000 );
                        //logger.log(Level.INFO,"nextOutputBuffer = "+outputBufferIndex);
                    //}

                } while (outBuffInfo.flags != MediaCodec.BUFFER_FLAG_END_OF_STREAM);

                fis.close();
                fos.flush();
                fos.close();



            }
            catch ( Exception e)
            {
                //Logger.getLogger(MainActivity.class.getSimpleName()).log(Level.INFO, "Codec Error",e);
            }

            //logger.log(Level.INFO,"Done");

            return null;
        }

    }.execute();
}