python_converter_func.py

import os
import threading

from PyQt6.QtCore import QObject, pyqtSlot, pyqtSignal
from pyffmpeg import FFmpeg


class Converter(QObject):

    def __init__(self, parent=None):
        QObject.__init__(self)

    convertCompleted = pyqtSignal(str, arguments=['convert'])
    progressUpdated = pyqtSignal(int, arguments=['progress'])

    @pyqtSlot(str)
    def convert(self, input_file: str):
        c_thread = threading.Thread(target=self._convert,
        args=[input_file])
        c_thread.daemon = True
        c_thread.start()

    def _convert(self, input_file: str):
        print('Inside Convert function')
        input_file = input_file.replace('file:///', '')
        audio_name = os.path.splitext(input_file)[0] + '.mp3'

        ff_obj = FFmpeg()
        ff_obj.report_progress = True
        ff_obj.onProgressChanged = self.updateProgress    # line 30
        ff_obj.convert(input_file, audio_name)
        print('Done: ', audio_name)
        self.convertCompleted.emit('')

    def updateProgress(self, progress):
        self.progressUpdated.emit(progress)