record audio in ios and save as mpeg

vudangkhoa2906

Hi guys, I'm trying to implement the voice message feature in my app.
I have this issue. When I record the audio, the output file is of type .wav, which is really large (~1MB for only a few seconds)

here is my code for the recording part:

    mAudioRecorder->setAudioInput(mAudioRecorder->defaultAudioInput());
    QAudioEncoderSettings mAudioEncoderSettings;
    mAudioEncoderSettings.setEncodingMode(QMultimedia::ConstantBitRateEncoding);
    mAudioEncoderSettings.setChannelCount(1);
    mAudioEncoderSettings.setCodec("audio/pcm"); // this is the only supported codec for iOS
    mAudioEncoderSettings.setSampleRate(16000);
    mAudioEncoderSettings.setBitRate(16000);
    mAudioRecorder->setEncodingSettings(mAudioEncoderSettings);
    mAudioRecorder->record();

after calling the

    mAudioRecorder->stop();

method, I read the content of the saved audio:

            QFile file;
            file.setFileName(path.toLocalFile()); // this is a .wav file
            if (!file.open(QIODevice::ReadOnly)) {
                return;
            }

            QByteArray fileContent(file.readAll());
            qDebug() <<  fileContent.size();
            if (fileContent.size() > 300 * 1024) {
                qDebug() <<  error file content out of limit";
            }

I only want the file to be 1MB the largest. is there anyway I can convert the .wav to .mp4/aac/m4a output (which are smaller)?