diff --git a/lib/philomena/processors/webm.ex b/lib/philomena/processors/webm.ex
index 0b8b2dd4..17b2f019 100644
--- a/lib/philomena/processors/webm.ex
+++ b/lib/philomena/processors/webm.ex
@@ -83,7 +83,7 @@ defmodule Philomena.Processors.Webm do
     gif = Briefly.create!(extname: ".gif")
     scale_filter   = "scale=w=#{width}:h=#{height}:force_original_aspect_ratio=decrease"
     palette_filter = "paletteuse=dither=bayer:bayer_scale=5:diff_mode=rectangle"
-    rate_filter    = "fps=1/#{duration},settb=1/2,setpts=N"
+    rate_filter    = "fps=1/#{duration / 10},settb=1/2,setpts=N"
     filter_graph   = "[0:v] #{scale_filter},#{rate_filter} [x]; [x][1:v] #{palette_filter}"
 
     {_output, 0} =