diff --git a/README.md b/README.md
index cf5014a..4a6c568 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ For short: **Video2X enlarges your video without losing details**
 
 Watch for the sharper edges in this screenshot around the shadows:
 
-[![preview](https://user-images.githubusercontent.com/18014964/36638068-19cdb78c-19b8-11e8-8dfb-406b7015d30c.png)](https://www.youtube.com/watch?v=PG94iPoeoZk)
+[![preview](https://user-images.githubusercontent.com/21986859/49412428-65083280-f73a-11e8-8237-bb34158a545e.png)
 
 **Or you can watch the YouTube video Demo: https://www.youtube.com/watch?v=PG94iPoeoZk**
 
diff --git a/bin/config_generator.py b/bin/config_generator.py
index 74f3750..58d4466 100755
--- a/bin/config_generator.py
+++ b/bin/config_generator.py
@@ -33,7 +33,14 @@ def enroll_settings():
 
     settings['waifu2x_path'] = get_path('waifu2x-caffe-cui.exe path: ')
     settings['ffmpeg_path'] = get_path('ffmpeg binaries directory: ')
-    settings['ffmpeg_arguments'] = Avalon.gets('Extra arguments passed to ffmpeg: ')
+
+    settings['ffmpeg_arguments'] = []
+    while True:
+        argument = Avalon.gets('Extra arguments passed to ffmpeg (empty when done): ')
+        if argument:
+            settings['ffmpeg_arguments'].append(argument)
+        else:
+            break
 
     settings['ffmpeg_hwaccel'] = Avalon.gets('ffmpeg hardware acceleration method (cuda): ')
     if settings['ffmpeg_hwaccel'] == '':
diff --git a/bin/video2x_setup.py b/bin/video2x_setup.py
index fcd745f..d88b4ca 100755
--- a/bin/video2x_setup.py
+++ b/bin/video2x_setup.py
@@ -113,7 +113,7 @@ class Video2xSetup:
 
         settings['waifu2x_path'] = '{}\\video2x\\waifu2x-caffe\\waifu2x-caffe-cui.exe'.format(os.getenv('localappdata'))
         settings['ffmpeg_path'] = '{}\\video2x\\ffmpeg-4.1-win64-static\\bin'.format(os.getenv('localappdata'))
-        settings['ffmpeg_arguments'] = ''
+        settings['ffmpeg_arguments'] = []
         settings['ffmpeg_hwaccel'] = 'cuda'
 
         with open('video2x.json', 'w') as config: