How do I implement a slider that controls when an mp3 file is playing?(PyQt 5, Python 3)
I've seen some examples where QSlider was created that was bound to QMediaPlayer. But these examples were complicated by various additional functions, which made it very difficult for me to understand the device of the slider itself.
I would like to create a simple slider that could control when an audio file is playing. Please tell me how it can be done?
Right now, my code can only play and pause files that have paths to them. stores a dictionary self.dict:
from PySide2 import QtCore, QtWidgets, QtGui, QtMultimedia
class MyWindow(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.dict = {
'1.Papercut.mp3': [],
'13.Numb.mp3': []
}
self.song = ''
self.player = QtMultimedia.QMediaPlayer()
self.qsl = QtWidgets.QSlider(QtCore.Qt.Horizontal, self)
self.qsl.sliderMoved[int].connect(self.SetPlayPosition)
self.box = QtWidgets.QGridLayout(self)
for line, song in enumerate(self.dict):
play_btn = QtWidgets.QPushButton('Play', clicked=lambda song=song: self.play(song))
pause_btn = QtWidgets.QPushButton('Pause', clicked=self.pause, enabled=False)
label = QtWidgets.QLabel(song)
self.box.addWidget(play_btn, line, 0)
self.box.addWidget(pause_btn, line, 1)
self.box.addWidget(label, line, 2)
self.dict[song].append(play_btn)
self.dict[song].append(pause_btn)
self.box.addWidget(self.qsl, 2, 0)
def SetPlayPosition(self):
self.player.setPosition(self.qsl.value())
# Воспроизведение
def play(self, song):
if self.player.isAudioAvailable() == False:
self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(song)))
self.dict[song][1].setEnabled(True)
self.song = song
if self.song == song:
pass
else:
self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(song)))
self.dict[self.song][1].setEnabled(False)
self.dict[song][1].setEnabled(True)
self.song = song
self.player.play()
# Пауза
def pause(self):
self.player.pause()
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
window.setWindowTitle('MP3-player, PyQt5')
window.show()
sys.exit(app.exec_())
2
1 answers
In general, all the details are here https://doc.qt.io/qt-5/qmediaplayer.html
and here https://doc.qt.io/qt-5/qslider.html
I have marked the lines that have been changed for you.
#from PySide2 import QtCore, QtWidgets, QtGui, QtMultimedia
from PyQt5 import QtCore, QtWidgets, QtGui, QtMultimedia
class MyWindow(QtWidgets.QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.dict = {
'bibi.mp3': [],
'D:/_Qt/EXE/Mp3/new_build/QThread_mp3/img/zvuki_prirody.mp3': []
}
self.song = ''
self.player = QtMultimedia.QMediaPlayer()
# [signal]void QMediaPlayer::stateChanged(QMediaPlayer::State state) # +++
self.player.stateChanged.connect(self.playerState) # +++ !!!
self.qsl = QtWidgets.QSlider(QtCore.Qt.Horizontal, self)
self.qsl.sliderMoved[int].connect(self.SetPlayPosition)
self.qsl.sliderReleased.connect(self.slider_released) # +++ !!!
self.box = QtWidgets.QGridLayout(self)
for line, song in enumerate(self.dict): # !!! vv # vvvv
play_btn = QtWidgets.QPushButton('Play', clicked=lambda ch, song=song: self.play(song)) # + ch, !!!
pause_btn = QtWidgets.QPushButton('Pause', clicked=self.pause, enabled=False)
label = QtWidgets.QLabel(song)
self.box.addWidget(play_btn, line, 0)
self.box.addWidget(pause_btn, line, 1)
self.box.addWidget(label, line, 2)
self.dict[song].append(play_btn)
self.dict[song].append(pause_btn)
self.box.addWidget(self.qsl, 2, 0, 1, 3) # + , 1, 3
# ++ vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
self.Play_Pause = True
self.timer = QtCore.QTimer(self)
self.timer.timeout.connect(self.PlayMode)
self.timer.start(1000)
def PlayMode(self):
if self.Play_Pause==False:
self.qsl.setMinimum(0)
self.qsl.setMaximum(self.player.duration())
self.qsl.setValue(self.qsl.value() + 1000)
def slider_released(self):
# print(f'slider_released ->> {self.qsl.value()}') # !!!
self.player.setPosition(self.qsl.value()) # !!!
# ++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
def SetPlayPosition(self, val):
pass
#? self.player.setPosition(self.qsl.value()) # см. выше
# print(val) # !!!
# Воспроизведение
def play(self, song):
if self.player.isAudioAvailable() == False:
self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(song)))
self.dict[song][1].setEnabled(True)
self.song = song
if self.song == song:
pass
else:
self.player.setMedia(QtMultimedia.QMediaContent(QtCore.QUrl(song)))
self.dict[self.song][1].setEnabled(False)
self.dict[song][1].setEnabled(True)
self.song = song
self.player.play()
self.Play_Pause=False # +++
# Пауза
def pause(self):
self.player.pause()
self.Play_Pause=True # +++
# ++ vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
def playerState(self, state):
if state == 0:
# self.qsl.setValue(0)
self.Play_Pause=True
self.qsl.setSliderPosition(0)
# ++ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
window.setWindowTitle('MP3-player, PyQt5')
window.show()
sys.exit(app.exec_())
2
Author: S. Nick, 2020-03-05 22:45:48