diff --git a/over-video.py b/over-video.py
index f541ae0..3d813cf 100755
--- a/over-video.py
+++ b/over-video.py
@@ -46,7 +46,7 @@ if __name__ == '__main__':
 	main.add_option('normalize', 'bool', True, 'Normalize the audio track.', short_name='n')
 	main.add_option('normalize-target', 'float', -20.0, 'Target mean volume to target.')
 	main.add_option('normalize-override', 'float', 0.0, 'Volume correction to use instead of computing the required value in a (lengthy) pre-pass.', short_name='N')
-	main.add_option('ffmpeg-vfilter', 'str', '', 'Raw ffmpeg -filter:v options, e.g. "scale=1280:trunc(ow/a/2)*2"', short_name='f')
+	main.add_option('ffmpeg-vfilter', 'str', '', 'Raw ffmpeg -filter:v options, e.g. "scale=1280:trunc(ow/a/2)*2,transpose=dir=1"', short_name='f')
 	main.add_option('move-source', 'str', '', 'Move source file to this directory after conversion.', short_name='m')
 	main.add_option('dump-commands', 'bool', False, 'Print ffmpeg commands that would be executed. If §B--§gnormalize§/ is in effect, the normalization pre-pass will still be performed so that the proper volume correction can be computed.', short_name='D')
 	main.add_option('armed', 'bool', False, 'Perform the suggested action.', short_name='A', use_cfg_file=False)