Class: Pruview::VideoImage

Inherits:
Object
  • Object
show all
Defined in:
lib/pruview/video_image.rb

Class Method Summary collapse

Class Method Details

.to_jpg(source, target_dir, name) ⇒ Object

this class assumes you have ‘ffmpeg’ installed and in your path

Raises:



6
7
8
9
10
11
12
13
14
15
16
 
# File 'lib/pruview/video_image.rb', line 6

def self.to_jpg(source, target_dir, name)
  raise Pruview::Exceptions::InvalidError, "Invalid source file:: #{source.to_s}" if !File.file?(source)
  raise Pruview::Exceptions::InvalidError, "Invalid target directory: #{target_dir.to_s}" if !File.directory?(target_dir)
  raise Pruview::Exceptions::InvalidError, "Video not supported - file extension: " + file_extension(source) if !format_supported?(source)
  target = File.join(target_dir, name.to_s + '.jpg')
  video = Video.new(source, target_dir)
  duration = video.info['duration'] || 10
  run(build_command(source, "-ss 00:00:#{duration * 0.1}", 'mjpeg', target), "Unable to get preview image for #{target}")
  # TODO: analyze image - create better
  return target
end