Question

So here we have a Python script:

""" Record a few seconds of audio and save to a WAVE file. """

import pyaudio
import wave
import sys

chunk = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 44100
RECORD_SECONDS = 5
WAVE_OUTPUT_FILENAME = "output.wav"

p = pyaudio.PyAudio()

stream = p.open(format = FORMAT,
                channels = CHANNELS,
                rate = RATE,
                input = True,
                frames_per_buffer = chunk)

print "* recording"
all = []
for i in range(0, RATE / chunk * RECORD_SECONDS):
    data = stream.read(chunk)
    all.append(data)
print "* done recording"

stream.close()
p.terminate()

# write data to WAVE file
data = ''.join(all)
wf = wave.open(WAVE_OUTPUT_FILENAME, 'wb')
wf.setnchannels(CHANNELS)
wf.setsampwidth(p.get_sample_size(FORMAT))
wf.setframerate(RATE)
wf.writeframes(data)
wf.close()

And this script does what the first comentary line says, if you run it in terminal it will output a “.wav” file in the path you’re set in the moment of the execution… What I want to do is to get that file and “manipule” it, instead of outputting it to the Computer, I want to store it in a variable or something like that, and then I would like to POST it to an URL parsing some parametters along with it… I saw some interesting examples of posting multipart-encoded files using requests, as you can see here:

http://docs.python-requests.org/en/latest/user/quickstart/

But I made several attempts of achieving what I’m descripting in this question and I was unlucky… Maybe a little guidance will help with this one 🙂

Being Brief, what I need is to record a WAV file from microphone and then POST it to an URL (Parsing Data like the Headers with it) and then get the output in a print statement or something like that in the terminal…

Thank You!!

Answer 1

wave.open lets you pass either a file name or a file-like object to save into. If you pass in a StringIO object rather than WAVE_OUTPUT_FILENAME, you’ll can get a string object that you can presumably use to construct a POST request.

Note that this will load the file into memory — if it might be really long, you might prefer to do it into a temporary file and then use that to make your request. Of course, you’re already loading it into memory, so maybe that’s not an issue.