IT博客汇 | 在一个uploader里面同时处理不同文件的截图

在一个uploader里面同时处理不同文件的截图

发表于 2016-03-21 07:47:11

我的目的是在一个uploader里面可以同时上传视频和pdf，同时可以截图，视频的截使用gem 'carrierwave-video-thumbnailer'这个gem.

方法如下：

version :thumb, :if => :thumbable? do
   process :efficient_conversion => [640, 960], :if => :pdf?
   process thumbnail: [{format: 'png', quality: 7, size:112, strip: false, square:false, logger: Rails.logger}], :if => :video?
      def full_filename for_file
        png_name for_file, version_name
      end
 end

 version :large, :if => :thumbable? do
   process :efficient_conversion => [640, 960], :if => :pdf?
   process thumbnail: [{format: 'png', quality: 7, size:800, strip: false, square:false, logger: Rails.logger}], :if => :video?
   def full_filename for_file
     png_name for_file, version_name
   end
 end

 def thumbable?(file)
   pdf?(file) || video?(file)
 end

protected
    def video?(new_file)
      new_file.content_type.end_with? '/mp4'
    end

    def pdf?(new_file)
      new_file.content_type.end_with? '/pdf'
    end

--END--