From 5ab1d24b0d9e5ee4d3ca9af31fc01a64f0ebbfbd Mon Sep 17 00:00:00 2001
From: pukkandan <pukkandan@gmail.com>
Date: Sat, 17 Oct 2020 16:11:09 +0530
Subject: [PATCH] Relaxed validation for format filters so that any arbitary
 field can be used

---
 youtube_dl/YoutubeDL.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 19370f62b..4893baeea 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -1073,7 +1073,7 @@ class YoutubeDL(object):
                 '*=': lambda attr, value: value in attr,
             }
             str_operator_rex = re.compile(r'''(?x)
-                \s*(?P<key>ext|acodec|vcodec|container|protocol|format_id)
+                \s*(?P<key>[a-zA-Z0-9._-]+)
                 \s*(?P<negation>!\s*)?(?P<op>%s)(?P<none_inclusive>\s*\?)?
                 \s*(?P<value>[a-zA-Z0-9._-]+)
                 \s*$