great thanks! you are so fast!!!

I'm not very familiar with python so I don't know how to handle this.

No problem... Let me give some assistance.

The plugin isn't very well maintained and its code is rather old. Your changes are fine for a quick fix (we don't have to refactor/rewrite the plugin for this), apart from two issues:

1. Instead of accessing the JSON data keys like json["..."], use json.get("..."), so no KeyError will get raised if the data is missing (the validation schema defines them as optional).
2. Another issue could be if the JSON data values are set to null, so it'd be better for this non-essential data to be validated as validate.any(str, None) instead of just str.

Btw, _get_channel_info() does only get called once, so it's probably better to apply the plugin metadata in _get_streams() after all checks have been performed, just before the streams get returned.

Checking the metadata of a random channel from your branch:

$ streamlink 'https://play.afreecatv.com/jjllyy/255329138' -j | jq .metadata
{
  "id": "jjllyy",
  "author": "박수박",
  "category": null,
  "title": "콜롬비아 빈민가 x 행배"
}

id must be a unique value. Using the broadcast number should be fine.

I meant changing it to the bno, which should be unique, right?

Using the broadcast number from the JSON data is also fine...

Please also add the metadata to the plugin module metadata at the top:

diff --git a/src/streamlink/plugins/afreeca.py b/src/streamlink/plugins/afreeca.py
index 364dc6fb..22ee99f0 100644
--- a/src/streamlink/plugins/afreeca.py
+++ b/src/streamlink/plugins/afreeca.py
@@ -2,6 +2,9 @@
 $description TV and live video game broadcasts, artist performances and personal daily-life video blogs & shows.
 $url play.afreecatv.com
 $type live
+$metadata id
+$metadata author
+$metadata title
 """
 
 import logging

BJID is also unique. BNO is updated every time the streamer turns on the broadcast.

omg I made a mistake with this commit...

Thanks, should be fine now...

Plugin metadata is properly documented:
https://deploy-preview-5849--streamlink.netlify.app/plugins#afreeca

merging...

Sorry, but there's a suggestion, can you add the English username of the streamer to the metadata? It's "jjllyy", and I want to use the English name as the file name for easy identification (I don't know Korean), and this English name is also unique

Sorry, but there's a suggestion, can you add the English username of the streamer to the metadata? It's "jjllyy", and I want to use the English name as the file name for easy identification (I don't know Korean), and this English name is also unique

How about sideloading a modified plugin or using an English ID based on URL?
Looking at the docs, the id variable is The unique ID of the stream, e.g. an internal numeric ID or randomized string. It says.

Sorry, but there's a suggestion, can you add the English username of the streamer to the metadata? It's "jjllyy", and I want to use the English name as the file name for easy identification (I don't know Korean), and this English name is also unique对不起，但有一个建议，你能将主播的英文用户名添加到元数据中吗？是“jjllyy”，我想用英文名作为文件名，方便识别（我不懂韩文），这个英文名也是唯一的

How about sideloading a modified plugin or using an English ID based on URL?旁加载修改后的插件或使用基于 URL 的英文 ID 怎么样？ Looking at the docs, the id variable is The unique ID of the stream, e.g. an internal numeric ID or randomized string. It says.查看文档， id 变量是 The unique ID of the stream, e.g. an internal numeric ID or randomized string. It says。

OK, just finish. thanks!