Python 简单使用QMediaPlayer，QSoundEffect，QAudioOutput

Python 简单使用QMediaPlayer，QSoundEffect，QAudioOutput

from PyQt5 import QtCore, QtMultimedia, QtGui
import PyQt5

(1)适合于mp4,mp3

if __name__=="__main__":
    app = PyQt5.QtWidgets.QApplication(sys.argv)
    url = PyQt5.QtCore.QUrl.fromLocalFile("yourfilepath")
    content = PyQt5.QtMultimedia.QMediaContent(url)
    player = PyQt5.QtMultimedia.QMediaPlayer()
    player.setMedia(content)
    player.play()
    sys.exit(app.exec())
(2)适合于wav

if __name__=="__main__":
    
    effect = QtMultimedia.QSoundEffect()
    effect.setSource(QUrl.fromLocalFile("./radio/7571.wav"))
    effect.setLoopCount(1)
　　 effect.setVolume(1)
    # effect.setLoopCount(QtMultimedia.QSoundEffect.Infinite)#无限循环
　　effect.play()

setVolume()方法可以设置播放音频时的音量大小，参数为浮点型数值。1.0代表全音量播放，0.0代表静音；播放为 play(),停止为stop()。

（3）适合于播放PCM音频（裸流）文件，最强大的方式

if __name__=="__main__":
    app = PyQt5.QtWidgets.QApplication(sys.argv)
    format = PyQt5.QtMultimedia.QAudioFormat()
    format.setChannelCount(1)
    format.setSampleRate(1000)
    format.setSampleSize(8)
    format.setCodec("audio/pcm")
    format.setByteOrder(QtMultimedia.QAudioFormat.LittleEndian)
    format.setSampleType(QtMultimedia.QAudioFormat.UnSignedInt)
    output = PyQt5.QtMultimedia.QAudioOutput(format)
    rfile = PyQt5.QtCore.QFile()
    rfile.setFileName("../test/19147_160913105347.adpcm")
    rfile.open(PyQt5.QtCore.QIODevice.ReadOnly)
    output.start(rfile)
    app.exec()