Paperclip save images as jpg with white background

Question

Hi,

I'd like to know how to convert png and gif files with alpha channel to jpg with white background with paperclip

I tried this but, it doesn't work
has_attached_file :photo, :whiny => false, :styles => { :medium => ["300x300>", :jpg], :thumb => ["100x100>", :jpg] }, :convert_options => { :all => '-alpha white -background white'}

It saves the file with the gray background thanks

Answer 1

here the solution has_attached_file :photo, :styles => { :medium => ["300x300>", :jpg], :thumb => ["100x100>", :jpg] }, :convert_options => { :all => '-background white -flatten +matte'}