[YoutubeDL] Add ffmpeg_location to post processor options (closes #20532)

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
index 3b92acd9786e1778a1d5f4345a952d5ecd585618..57f52f888ac6821843992be9a786b947ab5e6264 100755 (executable)
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -309,6 +309,8 @@ class YoutubeDL(object):
     The following options are used by the post processors:
     prefer_ffmpeg:     If False, use avconv instead of ffmpeg if both are available,
                        otherwise prefer ffmpeg.
+    ffmpeg_location:   Location of the ffmpeg/avconv binary; either the path
+                       to the binary or its containing directory.
     postprocessor_args: A list of additional command-line arguments for the
                         postprocessor.