Python tkinter+moviepy+pyaudio开发视频播放器

骑猪看日落 2023-02-17 03:24 20阅读 0赞

### 文章目录 ###

*  1. 功能描述
 *  2. 代码

# 1. 功能描述 #

使用tkinter制作界面，播放mp4、avi视频，需要安装扩展库moviepy和pyaudio。

参考代码，这是大体的框架，对于不同帧速的视频还需要自己稍微调整一下画面播放速度的参数，暂时没有做到自适应所有帧速，也没有增加自由设置播放进度的功能。

# 2. 代码 #

import tkinter
    from time import sleep
    from threading import Thread
    from tkinter.filedialog import askopenfilename
    import pyaudio
    from PIL import Image, ImageTk
    from moviepy.editor import VideoFileClip
    
    root = tkinter.Tk()
    root.title('视频播放器')
    root.geometry('860x640+200+100')
    isPlaying = False
    
    # 用来显示视频画面的Label组件，自带双缓冲，不闪烁
    lbVideo = tkinter.Label(root, bg='white')
    lbVideo.pack(fill=tkinter.BOTH, expand=tkinter.YES)
    
    
    def play_video(video):
        vw = video.w
        vh = video.h
        # 逐帧播放画面
        for frame in video.iter_frames(fps=video.fps / 2.5):
            if not isPlaying:
                break
            w = root.winfo_width()
            h = root.winfo_height()
            # 保持原视频的纵横比
            ratio = min(w / vw, h / vh)
            size = (int(vw * ratio), int(vh * ratio))
            frame = Image.fromarray(frame).resize(size)
            frame = ImageTk.PhotoImage(frame)
            lbVideo['image'] = frame
            lbVideo.image = frame
            lbVideo.update()
    
    
    def play_audio(audio):
        p = pyaudio.PyAudio()
        # 创建输出流
        stream = p.open(format=pyaudio.paFloat32,
                        channels=2,
                        rate=44100,
                        output=True)
        # 逐帧播放音频
        for chunk in audio.iter_frames():
            if not isPlaying:
                break
            stream.write(chunk.astype('float32').tostring())
        p.terminate()
    
    
    # 创建主菜单
    mainMenu = tkinter.Menu(root)
    
    # 创建子菜单
    # tearoff=1时菜单顶部会有个虚线
    # 单击虚线之后可以使得菜单从窗口中分离处理单独显示
    
    subMenu = tkinter.Menu(tearoff=0)
    
    
    def open_video():
        global isPlaying
        isPlaying = False
        fn = askopenfilename(title='打开视频文件',
                             filetypes=[('视频', '*.mp4 *.avi')])
        if fn:
            root.title(f'视频播放器-正在播放"{fn}"')
            video = VideoFileClip(fn)
            audio = video.audio
            isPlaying = True
            # 播放视频的线程
            t1 = Thread(target=play_video, args=(video,))
            t1.daemon = True
            t1.start()
            # 播放音频的线程
            t2 = Thread(target=play_audio, args=(audio,))
            t2.daemon = True
            t2.start()
    
    
    # 添加菜单项，设置命令
    subMenu.add_command(label='打开视频文件',
                        command=open_video)
    # 把子菜单挂到主菜单上
    mainMenu.add_cascade(label='文件',
                         menu=subMenu)
    # 把主菜单放置到窗口上
    root['menu'] = mainMenu
    
    
    # 确保子线程关闭，
    def exiting():
        global isPlaying
        isPlaying = False
        sleep(0.05)
        root.destroy()
    
    
    root.protocol('WM_DELETE_WINDOW', exiting)
    root.mainloop()