Discord音乐Bot执行play命令无音频且报TypeError错误求助

问题现象 #

• 执行play命令后，Discord显示Bot正在输出音频，但听不到任何声音
• PyCharm控制台抛出如下错误：

Traceback (most recent call last):
  File "/Volumes/Mahmoud-Disk/MyProfile/Library/Python/3.8/lib/python/site-packages/discord/ext/commands/core.py", line 229, in wrapped
    ret = await coro(*args, **kwargs)
  File "/Volumes/Mahmoud-Disk/MyProfile/Desktop/Discord Bot/Discord-Bot/main.py", line 72, in play
    await ctx.send(embed = discord.Embed(
TypeError: __init__() got an unexpected keyword argument 'author'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/Volumes/Mahmoud-Disk/MyProfile/Library/Python/3.8/lib/python/site-packages/discord/ext/commands/bot.py", line 1349, in invoke
    await ctx.command.invoke(ctx)
  File "/Volumes/Mahmoud-Disk/MyProfile/Library/Python/3.8/lib/python/site-packages/discord/ext/commands/core.py", line 1023, in invoke
    await injected(*ctx.args, **ctx.kwargs)  # type: ignore
  File "/Volumes/Mahmoud-Disk/MyProfile/Library/Python/3.8/lib/python/site-packages/discord/ext/commands/core.py", line 238, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: __init__() got an unexpected keyword argument 'author'

用户代码 #

import discord
from discord.ext import commands
import wavelink

client = commands.Bot(command_prefix = ".", intents = discord.Intents.all())

class CustomPlayer (wavelink.Player):

    def __init__(self):
        super().__init__()
        self.queue = wavelink.Queue()


@client.event
async def on_ready():
    client.loop.create_task(connect_nodes()) #HTTPS and Websocket operations

async def connect_nodes(): #Helper function
    await client.wait_until_ready()
    await wavelink.NodePool.create_node(
        bot = client ,
        host = "127.0.0.1" ,
        port = 2333 ,
        password = "yk I can't "
    )

@client.event
async def on_wavelink_node_ready(node = wavelink.Node):
    print(f"Node: <{node.identifier}> is ready!")

@client.command()
async def connect(ctx):
    vc = ctx.voice_client
    try:
        channel = ctx.author.voice.channel
    except AttributeError:
        return await ctx.send("Please join a channel to connect.")
    if not vc:
        await ctx.author.voice.channel.connect(cls = CustomPlayer())
    else:
        await ctx.send("The bot is already connected to a voice channel.")

@client.command()
async def disconnect(ctx):
    vc = ctx.voice_client
    if vc:
        await vc.disconnect()
    else:
        await ctx.send("Bot is not connected to a voice channel.")

@client.command()
async def play(ctx, *, search: wavelink.YouTubeTrack):
    vc = ctx.voice_client #represents a discord voice connection
    if not vc:
        custom_player = CustomPlayer()
        vc: CustomPlayer = await ctx.author.voice.channel.connect(cls = custom_player)

    if vc.is_playing():

        vc.queue.put(item = search)

        await ctx.send(embed = discord.Embed(
            title = search.title,
            url = search.uri,
            author = ctx.author,
            description = f"Queued {search.title} in {vc.channel}"
        ))
    else:
        await vc.play(search)

        await ctx.send(embed = discord.Embed(
            title = search.title,
            url = search.uri,
            author = ctx.author,
            description = f"Playing {vc.source.title} in {vc.channel}"))

解决方案 #

1. 修复Embed初始化错误 #

discord.Embed的构造函数不支持author参数，需要通过set_author()方法单独设置作者信息。修改play命令中的两处Embed创建代码：

队列提示部分修改：

# 创建Embed基础内容
embed = discord.Embed(
    title=search.title,
    url=search.uri,
    description=f"Queued {search.title} in {vc.channel}"
)
# 设置作者信息
embed.set_author(name=ctx.author.display_name, icon_url=ctx.author.avatar.url)
await ctx.send(embed=embed)

播放提示部分修改：

embed = discord.Embed(
    title=search.title,
    url=search.uri,
    description=f"Playing {vc.source.title} in {vc.channel}"
)
embed.set_author(name=ctx.author.display_name, icon_url=ctx.author.avatar.url)
await ctx.send(embed=embed)

2. 排查无声问题 #

修复上述错误后，如果仍听不到声音，按以下步骤排查：

• 确认Lavalink节点已启动：本地需运行Lavalink服务，且代码中connect_nodes()方法的host、port、password与Lavalink配置文件一致
• 检查Bot权限：确保Bot在服务器中拥有语音连接和语音发言权限
• 版本兼容性：确认discord.py与wavelink版本匹配（Python3.6需使用对应兼容的旧版本，比如discord.py<=1.7.3，wavelink<=1.7.0）
• 本地音频设置：检查Discord中Bot的音量是否调至最大，以及自身音频输出设备是否正常

内容的提问来源于stack exchange，提问作者P-erson