python-3.x - VLC音频播放器结束时如何突破python输入？

Question

我正在尝试使用python-vlc在Python3中制作一个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，它从给定路径播放音频文件，还有一个main方法，该方法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或任何其他方法都没有问题。问题出在playSong函数中。

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() 

问题在于，由于 playSong循环，当 player完成歌曲时， while True方法不会退出。程序卡住了

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

即使播放器已经播放完毕。我不能随便取出 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

...

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 = selectors.DefaultSelector()
    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_state() != vlc.State.Ended:
            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()