The profile of the output AAC file maybe diff with the same audio para about spydroid-ipcamera HOT 1 OPEN

I found the cause, it is the google android bugs:
While the recorder record the AAC to fd, the AACWriter does not init the 
profile(only init it while record to file).

As below:
mAACProfile(OMX_AUDIO_AACObjectLC) not init in the AACWriter(fd). 

AACWriter::AACWriter(const char *filename)
    : mFd(-1),
      mInitCheck(NO_INIT),
      mStarted(false),
      mPaused(false),
      mResumed(false),
      mChannelCount(-1),
      mSampleRate(-1),
      mAACProfile(OMX_AUDIO_AACObjectLC) {

    ALOGV("AACWriter Constructor");

    mFd = open(filename, O_CREAT | O_LARGEFILE | O_TRUNC | O_RDWR, S_IRUSR | S_IWUSR);
    if (mFd >= 0) {
        mInitCheck = OK;
    }
}

AACWriter::AACWriter(int fd)
    : mFd(dup(fd)),
      mInitCheck(mFd < 0? NO_INIT: OK),
      mStarted(false),
      mPaused(false),
      mResumed(false),
      mChannelCount(-1),
      mSampleRate(-1) {
}