Discord.py：如何在播放命令上实现 ytsearch？

Question

大家好，我创建了这个音乐机器人，我想在播放按钮上实现 ytsearch，比如机器人“Rythm”。目前它只能使用 url 播放音乐，但我希望我的机器人能够使用相同的命令从 url 和关键字播放（比如！play 永远不会放弃你），但我不知道该怎么做.你们能帮帮我吗？

musics= {}
ytdl = youtube_dl.YoutubeDL()

class Video:
    def __init__(self, link):
        video = ytdl.extract_info(link, download = False)
        video_format = video["formats"][0]
        self.url =video["webpage_url"]
        self.stream_url =video_format["url"]

def play_song(client, queue, song):
    source= discord.PCMVolumeTransformer(discord.FFmpegPCMAudio(song.stream_url
    , before_options = "-reconnect 1 -reconnect_streamed 1 -reconnect_delay_max 5"))
    
    def next(_):
        if len(queue)>0:
            new_song= queue[0]
            del queue[0]
            play_song(client, queue, new_song)
        else:
            asyncio.run_coroutine_threadsafe(client.disconnect(), bot.loop)
    
    
    client.play(source, after=next)


@bot.command()
async def play (ctx, url):
    client = ctx.guild.voice_client
    if client and client.channel:
        video = Video(url)
        musics[ctx.guild].append(video)
    else:
        channel = ctx.author.voice.channel
        video = Video(url)
        musics[ctx.guild] = []
        client = await channel.connect()
        await ctx.send(f"Playing : {video.url}")
        play_song(client, musics[ctx.guild], video)

编辑： 因此，在尝试添加 ytdl_options 后，它给了我这个错误，即使没有 --noplaylist，它仍然给我同样的错误（我试图播放的音乐是眩目的灯光）。

ytdl_options = {
    'noplaylist': True,
    'default_search': 'auto'
}


ytdl = youtube_dl.YoutubeDL(ytdl_options)

[download] Downloading playlist: blinding
[youtube:search] query "blinding": Downloading page 1
[youtube:search] playlist blinding: Downloading 1 videos
[download] Downloading video 1 of 1
[youtube] 4NRXx6U8ABQ: Downloading webpage
[youtube] Downloading just video 4NRXx6U8ABQ because of --no-playlist
[download] Finished downloading playlist: blinding
Ignoring exception in command play:
Traceback (most recent call last):
  File "C:\Users\pietr\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "c:\Users\pietr\Desktop\Discord bot\Discord bot", line 152, in play
    video = Video(url)
  File "c:\Users\pietr\Desktop\Discord bot\Discord bot", line 93, in __init__
    video_format = video["formats"][0]
KeyError: 'formats'

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

Traceback (most recent call last):
  File "C:\Users\pietr\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 902, in invoke
    await ctx.command.invoke(ctx)
  File "C:\Users\pietr\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 864, in invoke
    await injected(*ctx.args, **ctx.kwargs)
  File "C:\Users\pietr\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 94, in wrapped
    raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: KeyError: 'formats'

Answer 1

当您创建YoutubeDL 对象时，您可以通过设置default_search 选项来指定其默认搜索行为。

引自here（强调我的）：

对不合格的 URL 使用此前缀。例如“gvsearch2:”为 youtube-dl“大苹果”从谷歌视频下载两个视频。 使用值“auto”让 youtube-dl 猜测（“auto_warning”在猜测时发出警告）。 “错误”只是抛出一个错误。默认值“fixup_error”修复损坏的 URL，但如果无法执行此操作，则会发出错误，而不是搜索。

ytdl_options = {'default_search': 'auto'}
ytdl = youtube_dl.YoutubeDL(ytdl_options)

您需要处理完成搜索的情况，因为返回的格式与提供有效 URL 时的格式不同。

import youtube_dl

ytdl_options = {
    'noplaylist': True,
    'default_search': 'auto'
}

ytdl = youtube_dl.YoutubeDL(ytdl_options)

link = 'test search'

video = ytdl.extract_info(link, download = False)

if 'entries' in video:
    video_format = video['entries'][0]["formats"][0]
elif 'formats' in video:
    video_format = video["formats"][0]

url = video["webpage_url"]
stream_url = video_format["url"]

Answer 2

可能想看看Youtube API。将resource 更改为search，然后单击list (by keyword)。你会得到它的示例代码。

您首先需要Obtain authorization credentials 才能使其正常工作。