From a7a14d958604f5334413e2fc1872a8317d5e4884 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jaime=20Marqui=CC=81nez=20Ferra=CC=81ndiz?=
 <jaime.marquinez.ferrandiz@gmail.com>
Date: Thu, 29 Jan 2015 20:15:38 +0100
Subject: [PATCH] [YoutubeDL] set the 'thumbnails' field if the info_dict has
 the 'thumbnails' field

Since the '--write-thumbnail' uses the 'thumbnails' field and we didn't updated the info_dict, it wouldn't detect the thumbnail. (fixes #4812)
---
 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 4c238c555..14e92ddcf 100755
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -958,7 +958,7 @@ class YoutubeDL(object):
         if thumbnails is None:
             thumbnail = info_dict.get('thumbnail')
             if thumbnail:
-                thumbnails = [{'url': thumbnail}]
+                info_dict['thumbnails'] = thumbnails = [{'url': thumbnail}]
         if thumbnails:
             thumbnails.sort(key=lambda t: (
                 t.get('preference'), t.get('width'), t.get('height'),