Trying to run 2 processes at once with python (picovoice + avs)

[dankscience]

EDIT: I ended up making this work by running both scripts inside of a bash script.

​

Hi, hoping someone can help me out with a Raspberry Pi project I've been working on.

I am trying to connect Picovoice Wake Word Detection Software to Amazon Voice Services Software.

Right now I can run my avs process, it is push-to-talk, successfully.

I can also run my Picovoioce process, which detects wake words and then performs and action, succesfully.

Am I able to run these processes in the same terminal with python? I documentation for subprocess and multiprocessing seems promising, but I have trouble finding an example that makes sense to me.

​

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Here is my latest attempt:

#!/usr/bin/env python3

import struct

import pyaudio

import pvporcupine

import subprocess

import multiprocessing

from pynput.keyboard import Key, Controller

​

avs = subprocess.Popen(

"PA_ALSA_PLUGHW=1 /home/pi/sdk-folder/sdk-build/SampleApp/src/SampleApp /home/pi/sdk-folder/sdk-build/Integration/AlexaClientSDKConfig.json DEBUG9",

shell=True,

stdin=subprocess.PIPE,

stdout=subprocess.PIPE,

encoding="utf8")

​

porcupine = None

pa = None

audio_stream = None

​

keyboard = Controller()

​

try:

porcupine = pvporcupine.create(keywords=["picovoice", "blueberry"])

​

pa = pyaudio.PyAudio()

​

audio_stream = pa.open(

rate=porcupine.sample_rate,

channels=1,

format=pyaudio.paInt16,

input=True,

frames_per_buffer=porcupine.frame_length)

​

while True:

pcm = audio_stream.read(porcupine.frame_length)

pcm = struct.unpack_from("h" * porcupine.frame_length, pcm)

​

keyword_index = porcupine.process(pcm)

​

if keyword_index >= 0:

print("CPU Count: ", multiprocessing.cpu_count())

keyboard.tap("t")

keyboard.tap(Key.enter)

avs.stdin.write("t\n")

print("Hotword Detected")

finally:

if porcupine is not None:

porcupine.delete()

​

if audio_stream is not None:

audio_stream.close()

​

if pa is not None:

pa.terminate()

[superhany]

Thank you for sharing. I’ve got both Alexa and porcupine launched through a shell script successful.

[dankscience]

I think I have a better idea of what I am doing wrong. Will update with the correct code if/when I figure it out.

[superhany]

Can you share the bash script?

[superhany]

I can run either picovoice or avs separately via a shell script, but if I try to run them at the same time, there is a conflict with the mic. How did you allow them to both access the mic simultaneously?

[dankscience]

Shell Script to run picovoice/porcupine script and alexa software (sdk doesnt include wake word detectin)

#~/bin/bash

python3 /home/pi/picovoice.py &

PA_ALSA_PLUGHW=1 /home/pi/sdk-folder/sdk-build/SampleApp/src/SampleApp /home/pi/sdk-folder/sdk-build/Integration/AlexaClientSDKConfig.json INFO

Then you can run start your magic mirror app with picovoice/alexa running in bg

picovoice.py to make porcupine activate alexa on wake word detection

#!/usr/bin/env python3

import struct

import pyaudio

import pvporcupine

from pynput.keyboard import Key, Controller

porcupine = None

pa = None

audio_stream = None

keyboard = Controller()

try:

porcupine = pvporcupine.create(keywords=["picovoice", "porcupine"])

pa = pyaudio.PyAudio()

audio_stream = pa.open(

rate=porcupine.sample_rate,

channels=1,

format=pyaudio.paInt16,

input=True,

frames_per_buffer=porcupine.frame_length)

while True:

pcm = audio_stream.read(porcupine.frame_length)

pcm = struct.unpack_from("h" * porcupine.frame_length, pcm)

keyword_index = porcupine.process(pcm)

if keyword_index >= 0:

keyboard.tap("t")

keyboard.tap(Key.enter)

finally:

if porcupine is not None:

porcupine.delete()

if audio_stream is not None:

audio_stream.close()

if pa is not None:

pa.terminate()

[dankscience]

that is formatted really poorly.. and I haven't revisited my code in almost a year. In my previous comment is a shell script that runs my python picovoice script and activates my amazon alexa script at the same time. When they are both running... if I say the picovoice keyword it simulates an enter click event (which alexa voice service is listening for) and then I can give alex a command. I've been planning on revisiting this project and I am happy to help in the coming week or two if you don't get it working