How to Create video Thumbnailer in rails

                      How to Create video Thumbnailer in rails

                     1.     In model you have to write 

                         

                             mount_uploader :video, AvatarUploader

                    

                      2.   write gem in your gemfile

                             

                              gem 'carrierwave' 

                              gem 'carrierwave-video-thumbnailer' 

                      

                      3.  and install dependance for thumbnailer

                                    

                              sudo apt-get install ffmpegthumbnailer

                      

                    4.   write code in your uploader folder

                      include CarrierWave::Video  # for your video processing

                      include CarrierWave::Video::Thumbnailer

                      version :thumb do

    process thumbnail: [{format: 'png', quality: 10, size: 192, strip: false, logger: Rails.logger}]

    def full_filename for_file

      png_name for_file, version_name

    end

  end

  def png_name for_file, version_name

    %Q{#{version_name}_#{for_file.chomp(File.extname(for_file))}.png}

  end

Note : strip  should be false for thumbnailer , go to public folder -> tmp->video -> 1-> you can file thumbnailer in your folder