PyQt5:简易视频播放器

本文旨在介绍如何使用PyQt5制作简易的视频播放器

ps:有些网友也许会遇到只能播放avi格式视频,而mp4等格式无法播放的问题(DirectShowPlayerService::doRender: Unresolved error code 0x8040266 (IDisspatch error #102)),这需要下载一个解码器,可参考这篇博客。



Version 1:最简易播放器

直接选用QT自带播放器和组件即可~

from PyQt5.QtWidgets import QApplication, QFileDialog
from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtMultimediaWidgets import QVideoWidget

if __name__ == '__main__':
    app = QApplication([])
    player = QMediaPlayer()
    wgt_video = QVideoWidget()  # 视频显示的widget
    wgt_video.show()
    player.setVideoOutput(wgt_video)  # 视频输出的widget
    player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))  # 选取视频文件
    player.play()
    app.exec_()

当然,也可以直接在程序里指定视频目录,只需要如下替换一下语句即可:

from PyQt5.Qt import QUrl

# player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))  # 选取视频文件
player.setMedia(QMediaContent(QUrl.fromLocalFile(r'C:\Users\lenovo\Desktop\crawler.mp4')))

PyQt5:简易视频播放器_第1张图片



Version 2:自制播放器界面

这里使用Qt Designer给我们简易的播放器加一个界面,提供选择视频的按钮~

首先,我们需要在Qt Designer中设计好我们的简易界面布局:
PyQt5:简易视频播放器_第2张图片

这里注意,视频播放所用的Widget在左侧工具箱中并没有直接给出,需要自行添加,可以参考这里,也可以参考下面的GIF演示。(Widget提升设置那里,提升的类名称为QVideoWidget,头文件为PyQt5.QtMultimediaWidgets)

下面给出源码,注意btn_select和wgt_player是在designer中给两个控件起的名称,‘video_1.ui’是上面designer保存后的文件~

from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtWidgets import QFileDialog, QApplication
from PyQt5 import uic

class videoPlayer:
    def __init__(self):
        self.ui = uic.loadUi('video_1.ui')  # 加载designer设计的ui程序
        self.player = QMediaPlayer()
        self.player.setVideoOutput(self.ui.wgt_player)
        self.ui.btn_select.clicked.connect(self.openVideoFile)
    # 打开视频文件并播放
    def openVideoFile(self):
        self.player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))
        self.player.play()


if __name__ == "__main__":
    app = QApplication([])
    myPlayer = videoPlayer()
    myPlayer.ui.show()
    app.exec()


Version 3:加入进度控件

下面给我们的播放器加入进度控件,可以对视频进行“播放/暂停”、“进度条显示与控制”、“剩余时间显示”等功能~
designer设计如下:
PyQt5:简易视频播放器_第3张图片
实现效果如下:(play/pause按钮可以播放暂停视频,进度条可以改变视频进度,并有剩余时间显示)

这其中主要涉及一些控件的信号/信号槽的简单使用,源码如下:

from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtWidgets import QFileDialog, QApplication
from PyQt5 import uic

class videoPlayer:
    def __init__(self):
        # 初始化
        self.ui = uic.loadUi('video_1.ui')  # 加载designer设计的ui程序
        # 播放器
        self.player = QMediaPlayer()
        self.player.setVideoOutput(self.ui.wgt_player)
        # 按钮
        self.ui.btn_select.clicked.connect(self.open)
        self.ui.btn_play_pause.clicked.connect(self.playPause)
        # 进度条
        self.player.durationChanged.connect(self.getDuration)
        self.player.positionChanged.connect(self.getPosition)
        self.ui.sld_duration.sliderMoved.connect(self.updatePosition)

    # 打开视频文件
    def open(self):
        self.player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))
        self.player.play()
    # 播放视频
    def playPause(self):
        if self.player.state()==1:
            self.player.pause()
        else:
            self.player.play()
    # 视频总时长获取
    def getDuration(self, d):
        '''d是获取到的视频总时长(ms)'''
        self.ui.sld_duration.setRange(0, d)
        self.ui.sld_duration.setEnabled(True)
        self.displayTime(d)
    # 视频实时位置获取
    def getPosition(self, p):
        self.ui.sld_duration.setValue(p)
        self.displayTime(self.ui.sld_duration.maximum()-p)
    # 显示剩余时间
    def displayTime(self, ms):
        minutes = int(ms/60000)
        seconds = int((ms-minutes*60000)/1000)
        self.ui.lab_duration.setText('{}:{}'.format(minutes, seconds))
    # 用进度条更新视频位置
    def updatePosition(self, v):
        self.player.setPosition(v)
        self.displayTime(self.ui.sld_duration.maximum()-v)

if __name__ == "__main__":
    app = QApplication([])
    myPlayer = videoPlayer()
    myPlayer.ui.show()
    app.exec()


Version 4:外观设计

完成基本功能后,下面进行一些面子工程,比如:设置窗口图标和标题、设置按钮图标、布局设计、设置背景等。这些功能可以靠编程实现,也可以在Qt Designer中完成~

比如,使用QSS给按钮添加图标:

 self.ui.btn_select.setStyleSheet('QPushButton{background:url(../icon/hide.png) no-repeat center}') # StyleSheet使用CSS语法
 self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/play.png) no-repeat center}')

比如,使用QIcon给窗口添加图标:

app.setWindowIcon(QIcon('../icon/bupt.jpg'))

比如,使用QPainter给窗口加背景图:

    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(self.ui.rect(), QPixmap('../icon/bg_1.jpg'))

比如,使用Designer中的QSS更改滑动条、标签外观等
 ps:选中控件 — 右键 — 改变样式表…
PyQt5:简易视频播放器_第4张图片



最后,给出效果展示以及源码~

from PyQt5.QtMultimedia import QMediaContent, QMediaPlayer
from PyQt5.QtWidgets import QFileDialog, QApplication, QWidget, QDialog
from PyQt5.QtGui import QIcon, QColor, QPainter, QPixmap
from PyQt5 import uic

class videoPlayer(QWidget):

    def __init__(self):
        super().__init__()
        self.ui = uic.loadUi('video_1.ui', baseinstance=self)  # 加载designer设计的ui程序
        # 播放器
        self.player = QMediaPlayer()
        self.player.setVideoOutput(self.ui.wgt_player)
        # 按钮
        self.ui.btn_select.clicked.connect(self.open)
        self.ui.btn_play_pause.clicked.connect(self.playPause)
        # 进度条
        self.player.durationChanged.connect(self.getDuration)
        self.player.positionChanged.connect(self.getPosition)
        self.ui.sld_duration.sliderMoved.connect(self.updatePosition)
        # 资源图片
        '''self.ui.btn_select.setIcon(QIcon('../icon/hide.png'))
        self.ui.btn_play_pause.setIcon(QIcon('../icon/play.png'))'''
        # self.ui.wgt_player.setStyleSheet("QWidget { background-color: QColor(0,0,0) }" )
        self.ui.btn_select.setStyleSheet('QPushButton{background:url(../icon/hide.png) no-repeat center}') # StyleSheet使用CSS语法
        self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/play.png) no-repeat center}')
    # 打开视频文件
    def open(self):
        self.player.setMedia(QMediaContent(QFileDialog.getOpenFileUrl()[0]))
        self.player.play()
        self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/pause.png) no-repeat center}')
    # 播放视频
    def playPause(self):
        if self.player.state()==1:
            self.player.pause()
            self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/play.png) no-repeat center}')
        elif self.player.state()==2 or self.ui.sld_duration.value()!=0:
            self.player.play()
            self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/pause.png) no-repeat center}')
    # 视频总时长获取
    def getDuration(self, d):
        '''d是获取到的视频总时长(ms)'''
        self.ui.sld_duration.setRange(0, d)
        self.ui.sld_duration.setEnabled(True)
        self.displayTime(d)
    # 视频实时位置获取
    def getPosition(self, p):
        self.ui.sld_duration.setValue(p)
        self.displayTime(self.ui.sld_duration.maximum()-p)
    # 显示剩余时间
    def displayTime(self, ms):
        minutes = int(ms/60000)
        seconds = int((ms-minutes*60000)/1000)
        self.ui.lab_duration.setText('{}:{}'.format(minutes, seconds))
        if ms==0:
            self.ui.btn_play_pause.setStyleSheet('QPushButton{background:url(../icon/play.png) no-repeat center}')
    # 用进度条更新视频位置
    def updatePosition(self, v):
        self.player.setPosition(v)
        self.displayTime(self.ui.sld_duration.maximum()-v)
    # 自定义paintEvent,绘制背景图
    def paintEvent(self, event):
        painter = QPainter(self)
        painter.drawPixmap(self.ui.rect(), QPixmap('../icon/bg_1.jpg'))

if __name__ == "__main__":
    app = QApplication([])
    app.setWindowIcon(QIcon('../icon/bupt.jpg'))
    myPlayer = videoPlayer()
    myPlayer.ui.show()
    app.exec()

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