gistfile1.rb

# For Slideshare we have to introspect the page and get the swf file in order to create the object/embed tags

AutoHtml.add_filter(:slideshare).with(:width => 650, :height => 528) do |text, options|
  text.gsub(/http:\/\/(www.)?slideshare\.net\/[A-Za-z0-9._%-]*\/([A-Za-z0-9._%-]*)[&\w;=\+_\-]*/) do |s|
    doc = Hpricot(open(s))
    swf = doc.to_s.match(/http:\/\/static.slidesharecdn.com\/swf\/ssplayer2\.swf\?doc\=([A-Za-z0-9._%-]*)[&\w;=\+_\-]*/)[0]
    %{<object style="margin:0px" width="#{options[:width]}" height="#{options[:height]}"><param name="movie" value="#{swf}" /><param name="allowFullScreen" value="true"/><param name="allowScriptAccess" value="always"/><embed src="#{swf}" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="#{options[:width]}" height="#{options[:height]}"></embed></object>}
  end
end

gistfile2.rb

AutoHtml.add_filter(:google_video).with(:width => 650, :height => 391) do |text, options|
  text.gsub(/http:\/\/video\.google\.com\/videoplay\?docid\=([0-9]*)[&\w;=\+_\-]*/) do
    docid = $1
    %{<object width="#{options[:width]}" height="#{options[:height]}"><param name="movie" value="http://video.google.com/googleplayer.swf?docid=#{docid}&hl=en&fs=true"></param><param name="wmode" value="transparent"></param><embed src="http://video.google.com/googleplayer.swf?docid=#{docid}" type="application/x-shockwave-flash" wmode="transparent" width="#{options[:width]}" height="#{options[:height]}"></embed></object>}
  end
end