diff --git a/ChangeLog b/ChangeLog
index 6e34972682..cdf55d2452 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2005-11-28  Jan Schmidt  <thaytan@mad.scientist.com>
+
+	* gst/matroska/matroska-mux.c:
+	(gst_matroska_mux_video_pad_setcaps):
+	From Michal Benes:
+	frame duration should be GST_SECOND / framerate, not
+	GST_SECOND * framerate. (Fixes: #322643)
+
 2005-11-27  Thomas Vander Stichele  <thomas at apestaart dot org>
 
 	* configure.ac:
diff --git a/gst/matroska/matroska-mux.c b/gst/matroska/matroska-mux.c
index 45333f1f97..4de8b1b21b 100644
--- a/gst/matroska/matroska-mux.c
+++ b/gst/matroska/matroska-mux.c
@@ -451,8 +451,8 @@ gst_matroska_mux_video_pad_setcaps (GstPad * pad, GstCaps * caps)
   videocontext->pixel_width = width;
   videocontext->pixel_height = height;
   context->default_duration = gst_util_uint64_scale_int (GST_SECOND,
-      gst_value_get_fraction_numerator (framerate),
-      gst_value_get_fraction_denominator (framerate));
+      gst_value_get_fraction_denominator (framerate),
+      gst_value_get_fraction_numerator (framerate));
 
   ret = gst_structure_get_int (structure, "pixel_width", &pixel_width);
   ret &= gst_structure_get_int (structure, "pixel_height", &pixel_height);