Hướng dẫn python play sound async

I have a while loop for my cameras(with opencv) to take a photos when something moves. I would like to call a function to play a sound as well. But when I call and play it, it will stop looping for that execution time. I tried ThreadPoolExecutor but had no idea how could I blend it with my code, because I'm not passing anything to the function. Just calling it from loop. Btw. I would like to be able to play it multiple times (multiple executions in time of execution) if multiple something in code appears from loop

camera script

from play_it import alert

while True:
    #do something in cv2
    if "something":
        alert() # Here it slowing the loop

and my play_it script

from playsound import playsound
import concurrent.futures

def alert():
    playsound('ss.mp3')


def PlayIt():
    with concurrent.futures.ThreadPoolExecutor() as exe:
        exe.map(alert, ???) # not sure what to insert here

asked Nov 26, 2019 at 1:23

3

I don't know what requirements playsound has for the thread it runs on, but the simplest and easiest thing to do is probably just to spawn off a thread to play the sound:

import threading
def alert():
    threading.Thread(target=playsound, args=('ss.mp3',), daemon=True).start()

daemon=True here starts the thread as a daemon thread, meaning that it won't block the program from exiting. (On Python 2, you have do t = threading.Thread(...); t.daemon = True; t.start() instead.)

answered Nov 26, 2019 at 3:19

nneonneonneonneo

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In this article, we will see how to play sound in Python using some of the most popular audio libraries. We will learn about the various methods for playing sound.

Method 1: Using playsound module

Run the following command to install the packages:

pip install playsound

• The playsound module contains only a single function named playsound().
• It requires one argument: the path to the file with the sound we have to play. It can be a local file, or a URL.
• There’s an optional second argument, block, which is set to True by default. We can set it to False for making the function run asynchronously.
• It works with both WAV and MP3 files.

Example: For WAV format

Python3

from playsound import playsound

playsound('/path/note.wav')

print('playing sound using  playsound')

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134813/gfgplaysound.mp4

Example: For mp3 format

Python3

from playsound import playsound

playsound('/path/note.mp3')

print('playing sound using  playsound')

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134813/gfgplaysound.mp4

Method 2: Using pydub module

Run the following commands to install the packages:

sudo apt-get install ffmpeg libavcodec-extra
pip install pydub

Note: You can open WAV files with python. For opening mp3, you’ll need ffmpeg or libav.

This module uses the from_wav() method for playing wav file and from_mp3() method for playing an mp3 file.  The play() method is used to play the wav and mp3 file:

Example 1: For WAV format

Python3

from pydub import AudioSegment

from pydub.playback import play

song = AudioSegment.from_wav("note.wav")

print('playing sound using  pydub')

play(song)

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134814/gfgpydub.mp4

Example 2: For mp3 format

Python3

from pydub import AudioSegment

from pydub.playback import play

song = AudioSegment.from_mp3("note.mp3")

print('playing sound using  pydub')

play(song)

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134814/gfgpydub.mp4

Method 3: Using tksnack module

The tksnack module depends upon a module named tkinter to activate a tk object in the python script. You must install tkinker and tksnack packages for Python. Run the following commands to install the packages:

sudo apt-get install python3-tk
sudo apt-get install python3-tksnack

The play() method is used to play the audio files. The blocking argument states that the sound will play asynchronously.

Example: 

Python3

from Tkinter import *

import tkSnack

root = Tk()

tkSnack.initializeSnack(root)

snd = tkSnack.Sound()

snd.read('note.wav')

print('playing sound using tkSnack')

snd.play(blocking=1)

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134818/gfgtksnack.mp4

Method 4: Using Native Player

In this method, we play sounds natively on our system. This method plays the audio file with an external player installed on your terminal.

Example 1: For Mac OS X

Python3

import os

file = "note.wav"

print('playing sound using native player')

os.system("afplay " + file)

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134811/gfgnativeplayer.mp4

Example 2: For Linux

Python3

import os

file = "note.mp3"

print('playing sound using native player')

os.system("mpg123 " + file)

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134811/gfgnativeplayer.mp4

Method 5: Using simpleaudio module

This is mainly designed to play WAV files and NumPy arrays. Run the following command to install the packages:

$ sudo apt-get install libasound2-dev
$ pip3 install simpleaudio

The play() method is used to play the audio files.

Example:

Python3

import simpleaudio as sa

wave_object = sa.WaveObject.from_wave_file('note.wav)

print('playing sound using simpleaudio')

play_object = wave_object.play()

play_object.wait_done()

Output:

https://media.geeksforgeeks.org/wp-content/uploads/20210102134816/gfgsimpleaudio.mp4