CODEWITHSUNDEEP
pythonaudiopyaudio
Torsten2001
Torsten2001

Reputation: 53

Using sound file as pyaudio input device

With PyAudio it is fairly simple to open an input stream comming from a physical sound input device.

I wonder if there is a way of open an existing sound file as a stream, which has the same properties as the sound-device-stream?

Instead of

    self.p = pyaudio.PyAudio()
    self.inStream = self.p.open(format=pyaudio.paInt16,
                                channels=1,
                                rate=self.RATE,
                                input=True,
                                frames_per_buffer=self.BUFFERSIZE)

I'd like to do

    self.p = pyaudio.PyAudio()
    self.inStream = self.p.open('testfile.wav',
                                input=True,
                                frames_per_buffer=self.BUFFERSIZE)

Regards, Torsten

Upvotes: 0

Views: 1914

Answers (1)

galarius
galarius

Reputation: 118

As far as I know you can't use PyAudio to open file directly, however it's possible to combine pyaudio and wave modules in case your app reroutes the processed sound to SoundFlower for example. 

import pyaudio, wave

def open_stream(self):
        self.p_audio = pyaudio.PyAudio()
        self.file_source = wave.open('input.wav', 'rb')
        s_width = self.file_source.getsampwidth()
        format = self.p_audio.get_format_from_width(s_width)
        channels = self.file_source.getnchannels()
        rate = self.file_source.getframerate()
        self.stream = self.p_audio.open(format=format,
                                        channels=channels,
                                        rate=rate,
                                        frames_per_buffer=1024,
                                        input=False,
                                        output=True,
                                        output_device_index=detect_build_in_output_device_idx(self.p_audio),
                                        stream_callback=self.__recording_callback)


def __recording_callback(self, in_data, frame_count, time_info, status):

        # read frames
        in_data = self.file_source.readframes(frame_count)
        # decode frames
        left, right = audio_decode(in_data, self.file_source.getnchannels())
        # process frames
        left, right = self.core.process(left, right)
        # encode back
        processed_data = audio_encode((left, right))

        return processed_data, pyaudio.paContinue

Upvotes: 0

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