I am running Ruby on Rails 3 and I would like to reduce the quality of an uploading image using the Paperclip plugin/gem. How can I do that?
At this time in my model file I have:
has_attached_file :avatar,
:styles => {
:thumb => ["50x50#", :jpg],
:medium => ["250x250#", :jpg],
:original => ["600x600#", :jpg] }
that will convert images in to the .jpg
format and will set dimensions.
Try using convert_options.
has_attached_file :avatar,
:styles => { :thumb => '50x50#' },
:convert_options => { :thumb => '-quality 80' }
From the paperclip wiki, there's an option for quality:
class User < ActiveRecord::Base
has_attached_file :photo,
:styles => {
:small => {
:geometry => '38x38#',
:quality => 40,
:format => 'JPG'
},
:medium => {
:geometry => '92x92#',
:quality => 50
}
end
As James says, once you figure out the correct arguments to pass to ImageMagick's convert
by experimenting on the command line, you can pass these in to Paperclip through the convert_options
option as in James' example.
If you have multiple arguments, pass them in as an array. Here's an example which I laboured over for a while:
:convert_options => {:medium => ["-shave", "2x2", "-background", "white",
"-gravity", "center", "-extent",
"530x322", "+repage"],
:small => ["-shave", "1x1"] }
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