使用python编写视频播放器，并且具备进度条等功能

Python 中有一个非常流行的 GUI 库叫做 PyQt，可以用它来实现视频播放器的 UI 界面。而具体的视频播放功能可以使用 Python 自带的 multimedia 模块或是第三方库如 VLC 来实现。

下面是一个简单的视频播放器的代码示例，包含了播放、暂停、停止、调整音量、调整进度等基本功能：

import sys
import vlc
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import QApplication, QWidget, QPushButton, QSlider, QHBoxLayout, QVBoxLayout, QLabel

class VideoPlayer(QWidget):
    def __init__(self):
        super().__init__()
        
        # 初始化 VLC 播放器
        self.vlc_instance = vlc.Instance()
        self.player = self.vlc_instance.media_player_new()
        
        # 定义 UI 控件
        self.play_button = QPushButton('Play')
        self.pause_button = QPushButton('Pause')
        self.stop_button = QPushButton('Stop')
        self.volume_slider = QSlider(Qt.Horizontal)
        self.volume_slider.setRange(0, 100)
        self.volume_slider.setValue(50)
        self.progress_label = QLabel('00:00:00 / 00:00:00')
        self.progress_slider = QSlider(Qt.Horizontal)
        self.progress_slider.setRange(0, 100)
        
        # 布局 UI 控件
        button_layout = QHBoxLayout()
        button_layout.addWidget(self.play_button)
        button_layout.addWidget(self.pause_button)
        button_layout.addWidget(self.stop_button)
        
        volume_layout = QHBoxLayout()
        volume_layout.addWidget(QLabel('Volume:'))
        volume_layout.addWidget(self.volume_slider)
        
        progress_layout = QHBoxLayout()
        progress_layout.addWidget(self.progress_label)
        progress_layout.addWidget(self.progress_slider)
        
        main_layout = QVBoxLayout()
        main_layout.addLayout(button_layout)
        main_layout.addLayout(volume_layout)
        main_layout.addLayout(progress_layout)
        self.setLayout(main_layout)
        
        # 连接信号槽
        self.play_button.clicked.connect(self.play)
        self.pause_button.clicked.connect(self.pause)
        self.stop_button.clicked.connect(self.stop)
        self.volume_slider.valueChanged.connect(self.set_volume)
        self.progress_slider.valueChanged.connect(self.set_position)
        
    def play(self):
        media = self.vlc_instance.media_new('video.mp4')
        self.player.set_media(media)
        self.player.play()
        
    def pause(self):
        self.player.pause()
        
    def stop(self):
        self.player.stop()
        
    def set_volume(self, value):
        self.player.audio_set_volume(value)
        
    def set_position(self, value):
        duration = self.player.get_length() / 1000
        position = duration * value / 100
        self.player.set_time(int(position * 1000))
        self.update_progress_label()
        
    def update_progress_label(self):
        duration = self.player.get_length() / 1000
        position = self.player.get_time() / 1000
        self.progress_label.setText(f'{self.format_time(position)} / {self.format_time(duration)}')
        
    def format_time(self, seconds):
        minutes, seconds = divmod(int(seconds), 60)
        hours, minutes = divmod(minutes, 60)
        return f'{hours:02}:{minutes:02}:{seconds:02}'
        
    def timerEvent(self, event):
        if event.timerId() == self.timer.timerId():
            self.update_progress_label()
            position = self.player.get_position()
            self.progress_slider.setValue(int(position * 100))
            
if __name__ == '__main__':
    app = QApplication(sys.argv)
    player = VideoPlayer()
    player.show()
    sys.exit(app.exec_())

这个代码示例使用了 PyQt5 和 VLC 库，实现了一个基本的视频播放器的 UI 界面，并且具备播放、暂停、停止、调整音量、调整进度等功能。你可以根据自己的需求来修改和扩展这个示例代码。