make medium dimensions a tuple

diff --git a/mediagoblin/media_types/video/processing.py b/mediagoblin/media_types/video/processing.py
index b91503ca037096fb05ad376527df17e2b9cf6735..4d7d9921b8f100f63f0307d7ae8344bda5e54b60 100644 (file)
--- a/mediagoblin/media_types/video/processing.py
+++ b/mediagoblin/media_types/video/processing.py
@@ -177,7 +177,7 @@ class CommonVideoProcessor(MediaProcessor):
                                       vp8_threads=vp8_threads,
                                       vorbis_quality=vorbis_quality,
                                       progress_callback=progress_callback,
-                                      dimensions=medium_size)
+                                      dimensions=tuple(medium_size))
 
             dst_dimensions = self.transcoder.dst_data.videowidth,\
                 self.transcoder.dst_data.videoheight