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Contents
module Sufia
module GenericFile
module Thumbnail
extend ActiveSupport::Concern
# Create thumbnail requires that the characterization has already been run (so mime_type, width and height is available)
# and that the object is already has a pid set
def create_thumbnail
return unless self.content.has_content?
if video?
create_video_thumbnail
else
create_derivatives
end
self.save
end
protected
def create_video_thumbnail
return unless Sufia.config.enable_ffmpeg
output_file = Dir::Tmpname.create(['sufia', ".png"], Sufia.config.temp_file_base){}
content.to_tempfile do |f|
# we could use something like this in order to find a frame in the middle.
#ffprobe -show_files video.avi 2> /dev/null | grep duration | cut -d= -f2 53.399999
command = "#{Sufia.config.ffmpeg_path} -i \"#{f.path}\" -loglevel quiet -vf \"scale=338:-1\" -r 1 -t 1 #{output_file}"
system(command)
raise "Unable to execute command \"#{command}\"" unless $?.success?
end
self.thumbnail.content = File.open(output_file, 'rb').read
self.thumbnail.mimeType = 'image/png'
end
end
end
end
Version data entries
40 entries across 40 versions & 2 rubygems