MediaRecorder setOutputFile套接字。文件未打开

Question

Device Google Glass XE19.1

我尝试在远程服务器上写文件：

        mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
        mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.MPEG_4_SP);
        mMediaRecorder.setVideoEncodingBitRate(0x4c4b40);
        mMediaRecorder.setAudioChannels(2);
        mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
        mMediaRecorder.setAudioEncodingBitRate(0x17700);
        mMediaRecorder.setAudioSamplingRate(44100);

        ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(socket);
        mMediaRecorder.setOutputFile(pfd.getFileDescriptor());

在远程服务器文件写入时，但是当我尝试打开它时，我得到下一个错误：

ftypisom isom3gp4 free

但是当我保存在SD卡中时，没关系。怎么了？

P.S。这个测试代码：效果非常好。文件打开并播放

   socket = new Socket(host,4444);


    File file = new File("C:/video.mp4");
    long length = file.length();
    byte[] bytes = null;
    bytes = new byte[1024]; 
    FileInputStream fis = new FileInputStream(file);
    BufferedInputStream bis = new BufferedInputStream(fis);
    BufferedOutputStream bos = new BufferedOutputStream(socket.getOutputStream());
    DataOutputStream dos = new DataOutputStream(socket.getOutputStream());
    int count;

    while((count = bis.read(bytes))>0){
        dos.write(bytes, 0, count);
    }
    System.out.println("File send");
    bos.flush();
    bos.close();
    fis.close();
    bis.close();
    socket.close();