From 00447c0e337ed372c31819ff1889222423b9ad99 Mon Sep 17 00:00:00 2001
From: David Heyman <qwertystop+github@fastmail.com>
Date: Wed, 2 May 2018 21:02:02 -0400
Subject: [PATCH] Add warning for --audio-format without -x

---
 youtube_dl/__init__.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index ba435ea42..949a7f539 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -445,6 +445,13 @@ def _real_main(argv=None):
         if opts.rm_cachedir:
             ydl.cache.remove()
 
+        # Warn if no-effect args are given
+        if opts.audioformat and not opts.extractaudio:
+            ydl.report_warning(
+                'You have specified "--audio-format", '
+                'but have not given "--extract-audio". '
+                'Audio will not be extracted.')
+
         # Maybe do nothing
         if (len(all_urls) < 1) and (opts.load_info_filename is None):
             if opts.update_self or opts.rm_cachedir: