[FIXED] Some Questions about QMediaPlayer() in PyQt6

Issue

I'm trying to play sound with QMediaPlayer()

Code 1: this work fine.

import sys

from PyQt6.QtCore import QUrl
from PyQt6.QtMultimedia import QAudioOutput, QMediaPlayer
from PyQt6.QtWidgets import QApplication

app = QApplication([])

filename = "src/2.mp3"
player = QMediaPlayer()
audio_output = QAudioOutput()
player.setAudioOutput(audio_output)
player.setSource(QUrl.fromLocalFile(filename))
audio_output.setVolume(50)
player.play()

sys.exit(app.exec())

Code 2 but this have no voice.

import sys

from PyQt6.QtCore import QUrl
from PyQt6.QtMultimedia import QAudioOutput, QMediaPlayer
from PyQt6.QtWidgets import QApplication

app = QApplication([])

def play_it():
    filename = "src/2.mp3"
    player = QMediaPlayer()
    audio_output = QAudioOutput()
    player.setAudioOutput(audio_output)
    player.setSource(QUrl.fromLocalFile(filename))
    audio_output.setVolume(50)
    player.play()

play_it()
sys.exit(app.exec())

I can't find what make differences here. Thanks for your help sincerely!

Solution

After the player.play() method is called it exits the function and the media player is garbage collected. You will need to keep a reference to the player by returning it if you would like it to live beyond the scope of the function call.

for example:

import sys

from PyQt6.QtCore import QUrl
from PyQt6.QtMultimedia import QAudioOutput, QMediaPlayer
from PyQt6.QtWidgets import QApplication

app = QApplication([])

def play_it():
    filename = "src/2.mp3"
    player = QMediaPlayer()
    audio_output = QAudioOutput()
    player.setAudioOutput(audio_output)
    player.setSource(QUrl.fromLocalFile(filename))
    audio_output.setVolume(50)
    return player

player = play_it()
player.play()
sys.exit(app.exec())

Answered By - Alexander