Youtube-dl搜索时如何跳过直播流避免format not available错误

我开发了一个通过Youtube-dl执行关键词搜索并展示结果的程序，当前设置搜索返回5条结果。
目前遇到的问题是：当搜索结果包含直播流时，Youtube-dl会返回ERROR: requested format not available，函数返回的info内容为空，其余非直播结果也无法正常获取。即便配置了"ignoreerrors":True参数，程序不会被错误中断，但仍会输出错误日志，且info依旧为空。
请问Youtube_dl是否提供跳过搜索直播流的配置项？或者是否有其他解决方案可以解决该问题？

原有代码 #

async def search_song(self, amount, song, get_url=False):
     info = await self.bot.loop.run_in_executor(None, lambda: youtube_dl.YoutubeDL({"format" : "bestaudio",'default_search': 'auto',"ignoreerrors":True,}).extract_info(f"ytsearch{amount}:{song}", download=False, ie_key="YoutubeSearch"))
     if len(info["entries"]) == 0: return None

     return [entry["webpage_url"] for entry in info["entries"]] if get_url else info

运行报错日志 #

[download] Downloading video 1 of 5
[youtube] q8A_TvjvMjo: Downloading webpage
[youtube] q8A_TvjvMjo: Downloading m3u8 information
[youtube] q8A_TvjvMjo: Downloading MPD manifest
ERROR: requested format not available
[download] Downloading video 2 of 5
[youtube] B1go9DPd_xg: Downloading webpage
[download] Downloading video 3 of 5
[youtube] XGSSmQiqBl8: Downloading webpage
[download] Downloading video 4 of 5
[youtube] u962IzRYPIE: Downloading webpage
ERROR: Premieres in 18 hours
[download] Downloading video 5 of 5
[youtube] WYYj2DUPHGI: Downloading webpage
[download] Finished downloading playlist: sleep
Ignoring exception in command search:
Traceback (most recent call last):
  File "C:\Users\kogetu\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
    ret = await coro(args, **kwargs)
  File "C:\Bot\PiyoMusicBot\music.py", line 147, in search
    embed.description += (f"[{entry['title']}]({entry['webpage_url']})\n")
TypeError: 'NoneType' object is not subscriptable

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

Traceback (most recent call last):
  File "C:\Users\kogetu\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 939, in invoke
    await ctx.command.invoke(ctx)
  File "C:\Users\kogetu\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 863, in invoke
    await injected(ctx.args, **ctx.kwargs)
  File "C:\Users\kogetu\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: TypeError: 'NoneType' object is not subscriptable

问题根因 #

ignoreerrors参数生效后，解析失败的直播、待首映内容会以None的形式存入entries列表，后续直接遍历列表取值时，访问None的键就会抛出类型错误。

修复方案 #

方案1：添加匹配过滤器直接排除无效内容（优先推荐） #

youtube-dl提供match_filter配置项，可在解析阶段直接过滤不符合要求的直播、待首映内容，不需要后续二次处理。

方案2：提取结果后兜底过滤空条目 #

两种方案可同时使用，彻底避免报错。

修改后的代码 #

import datetime

# 过滤规则：排除直播、未上线的首映内容
def match_filter_func(info_dict):
    if info_dict.get('is_live'):
        return '跳过直播内容'
    if info_dict.get('upcoming'):
        return '跳过待上线首映内容'
    if info_dict.get('release_date') and info_dict.get('release_date') > datetime.datetime.now().strftime('%Y%m%d'):
        return '跳过未到上线时间的内容'
    return None

async def search_song(self, amount, song, get_url=False):
    ydl_opts = {
        "format" : "bestaudio",
        'default_search': 'auto',
        "ignoreerrors":True,
        # 应用过滤规则
        "match_filter": match_filter_func,
        # 可选：关闭不必要的错误日志输出
        "quiet": True
    }
    info = await self.bot.loop.run_in_executor(None, lambda: youtube_dl.YoutubeDL(ydl_opts).extract_info(f"ytsearch{amount}:{song}", download=False, ie_key="YoutubeSearch"))
    if not info or not info.get("entries"): 
        return None
    # 兜底过滤所有空条目
    valid_entries = [entry for entry in info["entries"] if entry is not None]
    if len(valid_entries) == 0:
        return None
    return [entry["webpage_url"] for entry in valid_entries] if get_url else valid_entries

额外优化建议 #

如果要进一步降低直播内容的命中概率，可以在搜索关键词后拼接 -live，从搜索源头上过滤大部分带live标识的直播内容。

内容的提问来源于stack exchange，提问作者AmazingSushi