from PyQt5.QtWidgets import *
from PyQt5.QtMultimedia import *
from PyQt5.QtMultimediaWidgets import QVideoWidget
import sys
if __name__ == '__main__':
    app = QApplication(sys.argv)
    player = QMediaPlayer()
    vw=QVideoWidget()                       # 定义视频显示的widget
    vw.show()
    player.setVideoOutput(vw)                 # 视频播放输出的widget，就是上面定义的
    player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))  # 选取视频文件
    player.play()                               # 播放视频
    print(QFileDialog.getOpenFileUrl()[0])
    sys.exit(app.exec_())