How to get QAudioBuffer from QAudioProbe in Pyqt5 ?

HandsomeLeonard

It's my first question here.

I want to get the audio volume level when I use the QAudioRecorder, I looked it up in all websites, they told me to use audioBufferProbed signal from QAudioProbe, but what should I do after connecting the signal with the slot function to process the buffer, and I don't even know where the QAudioBuffer data is from

a part of my code is below, what should I add to get access to processing the audio recoded by the recorder?
Thank you!

        self.m_audioRecorder = QAudioRecorder()
        self.m_probe = QAudioProbe()
        self.m_probe.setSource(self.m_audioRecorder)
        self.m_probe.audioBufferProbed.connect(self.processBuffer)
        def processBuffer(self)
                pass

Bonnie

The processBuffer function should have a QAudioBuffer as parameter.
So when the function is called, you get a QAudioBuffer object, from the parameter.
Sorry I don't use Py, but your processBuffer definition seems to need another parameter.

HandsomeLeonard

thank you ,so in C++ version where is the AudioBuffer object from?

I saw code like this in C++ QT tutorial, I don't understand where the parameter buffer for processBuffer function is from

connect(m_probe, &QAudioProbe::audioBufferProbed,
            this, &AudioRecorder::processBuffer);

void AudioRecorder::processBuffer(const QAudioBuffer& buffer);

jsulm

@HandsomeLeonard said in How to get QAudioBuffer from QAudioProbe in Pyqt5 ?:

I don't understand where the parameter buffer for processBuffer function is from

Here: https://doc.qt.io/qt-5/qaudioprobe.html#audioBufferProbed
The signal parameter is passed from the signal emitter (m_probe in your case).

eyllanesc

@HandsomeLeonard change to def processBuffer(self, buffer):