VLC音频播放器结束时如何中断python输入？

Question

我正在尝试使用python-vlc在Python3中制作音乐播放程序来播放音频文件。只要歌曲还没有结束，我就希望能够暂停播放音频。我有一个playSong(path)函数，它从给定的路径播放音频文件，还有一个main方法，它在我指定的任何歌曲路径上调用playAudio函数。我还有其他一些功能，可以使用youtube-dl从YouTube下载歌曲。 main或其他任何方法均没有问题。问题出在playSong功能中。

这是我的代码：

import os
import re
import sys
import random
import vlc
import ytUrl
import youtube_dl
from termcolor import colored
from mutagen.mp3 import MP3

...

def playSong(path):
    audio = MP3(path)
    duration = audio.info.length  # This is not in use as of right now
    player = vlc.MediaPlayer(path)
    player.audio_set_delay(1000)  # keeps vlc from playback freezing issues
    player.play()
    print("Playing " + colored(path[:-len(".mp3")], "green") + "...")

    # the problem is here
    while True:
        do = input("> ").lower()
        if do == "pause":
            player.pause()
        elif do == "play":
            player.play()
        elif do == "stop" or do == "skip":
            player.stop()
        elif do == "exit":
            player.stop()
            main() 

问题是由于playSong循环，当player完成歌曲时while True方法不会退出。程序卡在

do = input("> ").lower()

即使播放器已经完成。我不能只退出while循环，因为我希望能够一直播放和暂停歌曲！

我该如何解决？任何帮助表示赞赏！

Answer 1

这对我在Ubuntu上有效。我相信它也可以在Mac上运行，但不能在Windows上运行：

import os
import re
import selectors
import sys
import random
import vlc
import ytUrl
import youtube_dl
from termcolor import colored
from mutagen.mp3 import MP3

sel = selectors.DefaultSelector()

...

def playSong(path):
    audio = MP3(path)
    duration = audio.info.length  # This is not in use as of right now
    player = vlc.MediaPlayer(path)
    player.audio_set_delay(1000)  # keeps vlc from playback freezing issues
    player.play()
    print("Playing " + colored(path[:-len(".mp3")], "green") + "...")

    sel.register(sys.stdin.fileno(), selectors.EVENT_READ)

    while True:
        sys.stdout.write('> ')
        sys.stdout.flush()
        # Poll for command input as long as the player hasn't reached the end
        while player.get_length() == 0 or player.get_time() < player.get_length():
            if sel.select(0.1):
                break  # Input avaliable - time to read input, so stop polling
        else:
            break  # Quit the command handling loop
        do = input().lower()
        if do == "pause":
            player.pause()
        elif do == "play":
            player.play()
        elif do == "stop" or do == "skip":
            player.stop()
        elif do == "exit":
            player.stop()
            main()