python - FFmpegPCMaudio 在我的服务器上不起作用，但它在我的计算机上工作

Question

我正在用 python 开发一个可以播放音乐的 Discord 机器人。当我在我的计算机上进行测试时，所有工作都可以找到，但是当我将所有文件放到我的服务器中时，它就会停止工作。所以我尝试在另一台计算机上运行它，不，它仍然无法正常工作。
首先我以为是电源问题，但另一台电脑几乎一样。我尝试将计算机上的所有软件包安装到第二个，但音乐部分仍然无法正常工作。这不是 Discord API 问题，因为我的其他命令可以正常工作。

import discord
from discord.ext import commands
from youtube_dl import YoutubeDL


class music_cog(commands.Cog):
    def __init__(self, bot):
        self.bot = bot

        # all the music related stuff
        self.is_playing = False

        # 2d array containing [song, channel]
        self.music_queue = []
        self.YDL_OPTIONS = {'format': 'bestaudio', 'noplaylist': 'True'}
        self.FFMPEG_OPTIONS = {'before_options': '-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5',
                               'options': '-vn'}

        self.vc = ""

    # searching the item on youtube
    def search_yt(self, item):
        with YoutubeDL(self.YDL_OPTIONS) as ydl:
            try:
                info = ydl.extract_info("ytsearch:%s" % item, download=False)['entries'][0]
            except Exception:
                return False

        return {'source': info['formats'][0]['url'], 'title': info['title']}

    def play_next(self):
        if len(self.music_queue) > 0:
            self.is_playing = True

            # get the first url
            m_url = self.music_queue[0][0]['source']

            # remove the first element as you are currently playing it
            self.music_queue.pop(0)

            self.vc.play(discord.FFmpegPCMAudio(m_url, **self.FFMPEG_OPTIONS), after=lambda e: self.play_next())
        else:
            self.is_playing = False

    # infinite loop checking
    async def play_music(self):
        if len(self.music_queue) > 0:
            self.is_playing = True

            m_url = self.music_queue[0][0]['source']

            # try to connect to voice channel if you are not already connected

            if self.vc == "" or not self.vc.is_connected() or self.vc == None:
                self.vc = await self.music_queue[0][1].connect()
            else:
                await self.vc.move_to(self.music_queue[0][1])

            print(self.music_queue)
            # remove the first element as you are currently playing it
            self.music_queue.pop(0)

            self.vc.play(discord.FFmpegPCMAudio(m_url, **self.FFMPEG_OPTIONS), after=lambda e: self.play_next())
        else:
            self.is_playing = False

    @commands.command(name="play", help="Plays a selected song from youtube")
    async def p(self, ctx, *args):
        query = " ".join(args)

        voice_channel = discord.utils.get(ctx.guild.voice_channels, name='General')
        if voice_channel is None:
            # you need to be connected so that the bot knows where to go
            await ctx.send("Connect to a voice channel!")
        else:
            song = self.search_yt(query)
            if type(song) == type(True):
                await ctx.send(
                    "Could not download the song. Incorrect format try another keyword. This could be due to playlist or a livestream format.")
            else:
                await ctx.send("Song added to the queue")
                self.music_queue.append([song, voice_channel])

                if self.is_playing == False:
                    await self.play_music()

    @commands.command(name="queue", help="Displays the current songs in queue")
    async def q(self, ctx):
        retval = ""
        for i in range(0, len(self.music_queue)):
            retval += self.music_queue[i][0]['title'] + "\n"

        print(retval)
        if retval != "":
            await ctx.send(retval)
        else:
            await ctx.send("No music in queue")

    @commands.command(name="skip", help="Skips the current song being played")
    async def skip(self, ctx):
        if self.vc != "" and self.vc:
            self.vc.stop()
            # try to play next in the queue if it exists
            await self.play_music()

    @commands.command(name="disconnect", help="Disconnecting bot from VC")
    async def dc(self, ctx):
        await self.vc.disconnect()

    @commands.command(name="pause")
    async def pause(self, ctx):
        voice = discord.utils.get(self.bot.voice_clients, guild=ctx.guild)
        if voice.is_playing():
            voice.pause()
        else:
            await ctx.send("Currently no audio is playing.")

    @commands.command(name="resume")
    async def resume(self, ctx):
        voice = discord.utils.get(self.bot.voice_clients, guild=ctx.guild)
        if voice.is_paused():
            voice.resume()
        else:
            await ctx.send("The audio is not paused.")

没有任何错误消息，机器人只是加入语音聊天，什么也不做。
如果有人能告诉我它只在我的电脑上工作，我将非常感激。
我的文件:

Answer 1

我终于找到了问题，在环境变量中我设置的 ffmpeg 一般不在路径中。当我将 ffmpeg 放入 cmd 时它什么也没做，所以我在好地方重新安装了 ffmpeg，它完成了所有工作，感谢您的帮助😁