Streaming Langsung Audio dengan Python & Flask

Saat ini saya sedang berjuang dengan implementasi aplikasi web streaming langsung sederhana menggunakan Python dan Flask. Tampaknya saya tidak dapat melakukan streaming audio rekaman langsung dari input mikrofon server ke halaman web.

server.py

from flask import Flask, render_template, Response
import cv2
import framework
import pyaudio
import audio_processing as audioRec

FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 1024

audio = pyaudio.PyAudio()


app = Flask(__name__)


@app.route('/')
def index():
    """Video streaming home page."""
    return render_template('index.html')


# Stream routing
@app.route('/video_feed')
def video_feed():
    """Video streaming route. Put this in the src attribute of an img tag."""
    return Response(generateVideo(),
                    mimetype='multipart/x-mixed-replace; boundary=frame')


@app.route("/audio_feed")
def audio_feed():
    """Audio streaming route. Put this in the src attribute of an audio tag."""
    return Response(generateAudio(),
                    mimetype="audio/x-wav")


# Stream generating
def generateVideo():
    """Video streaming generator function."""
    cap = cv2.VideoCapture(0)
    while (cap.isOpened()):
        ret, frame = cap.read()
        output = framework.streamer(frame, 'final')
        cv2.imwrite('signals/currFrame.jpg', output)
        yield (b'--frame\r\n'
               b'Content-Type: image/jpeg\r\n\r\n' + open('signals/currFrame.jpg', 'rb').read() + b'\r\n')


def generateAudio():
    """Audio streaming generator function."""
    currChunk = audioRec.record()
    data_to_stream = genHeader(44100, 32, 1, 200000) + currChunk
    yield data_to_stream

    # with open("signals/audio.wav", "rb") as fwav:
    #     data = fwav.read(1024)
    #     while data:
    #         yield data
    #         data = fwav.read(1024)


def genHeader(sampleRate, bitsPerSample, channels, samples):
    datasize = samples * channels * bitsPerSample // 8
    o = bytes("RIFF",'ascii')                                               # (4byte) Marks file as RIFF
    o += (datasize + 36).to_bytes(4,'little')                               # (4byte) File size in bytes excluding this and RIFF marker
    o += bytes("WAVE",'ascii')                                              # (4byte) File type
    o += bytes("fmt ",'ascii')                                              # (4byte) Format Chunk Marker
    o += (16).to_bytes(4,'little')                                          # (4byte) Length of above format data
    o += (1).to_bytes(2,'little')                                           # (2byte) Format type (1 - PCM)
    o += (channels).to_bytes(2,'little')                                    # (2byte)
    o += (sampleRate).to_bytes(4,'little')                                  # (4byte)
    o += (sampleRate * channels * bitsPerSample // 8).to_bytes(4,'little')  # (4byte)
    o += (channels * bitsPerSample // 8).to_bytes(2,'little')               # (2byte)
    o += (bitsPerSample).to_bytes(2,'little')                               # (2byte)
    o += bytes("data",'ascii')                                              # (4byte) Data Chunk Marker
    o += (datasize).to_bytes(4,'little')                                    # (4byte) Data size in bytes
    return o




if __name__ == '__main__':
    app.run(host='0.0.0.0', debug=True, threaded=True)

audio_processing.py

import pyaudio

FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
CHUNK = 1024

audio = pyaudio.PyAudio()


def record():
    # start Recording
    stream = audio.open(format=FORMAT, channels=CHANNELS,
                    rate=RATE, input=True,
                    frames_per_buffer=CHUNK)
    # print "recording..."
    data = stream.read(CHUNK)
    return data

Saya mencoba mendapatkan Potongan mikrofon saat ini menggunakan audio_processing.py dan menggunakan hasil untuk merespons sampel saat ini kepada pengguna. Streaming video berfungsi cukup baik. Adakah yang tahu, apa yang saya lakukan salah di sini?

Salam baik, Felix