Class: Videoinfo::Video

Inherits:
Object
  • Object
show all
Defined in:
lib/videoinfo/video.rb

Direct Known Subclasses

Videoinfo::Videos::Movie

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, file, screenshots = 0) ⇒ Video

Returns a new instance of Video.



6
7
8
9
10
 
# File 'lib/videoinfo/video.rb', line 6

def initialize(name, file, screenshots = 0)
  self.name        = name
  self.file        = file
  self.screenshots = screenshots
end

Instance Attribute Details

#file ⇒ Object

Returns the value of attribute file.



4
5
6
 
# File 'lib/videoinfo/video.rb', line 4

def file
  @file
end

#name ⇒ Object

Returns the value of attribute name.



4
5
6
 
# File 'lib/videoinfo/video.rb', line 4

def name
  @name
end

#result ⇒ Object

Returns the value of attribute result.



4
5
6
 
# File 'lib/videoinfo/video.rb', line 4

def result
  @result
end

#screenshots ⇒ Object

Returns the value of attribute screenshots.



4
5
6
 
# File 'lib/videoinfo/video.rb', line 4

def screenshots
  @screenshots
end

Instance Method Details

#capture_screenshots ⇒ Object

Raises:



36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/videoinfo/video.rb', line 36

def capture_screenshots
  return [] unless screenshots > 0
  raise Error, "#{file}: file not found" unless File.file?(file)

  duration = %x(#{Videoinfo.mediainfo_binary} --Inform="General;%Duration%" #{file.shellescape}).strip.to_f / 1000
  raise Error, 'unable to determine video duration' unless $?.success? && duration > 0

  images   = []
  stepsize = screenshots == 1 ? 100 : 60 / (screenshots - 1)
  (20..80).step(stepsize) do |percent|
    image = Tempfile.new(["ss_#{percent}.", '.png'])
    %x(#{Videoinfo.ffmpeg_binary} -y -ss #{duration * percent / 100} -i #{file.shellescape} -vframes 1 -f image2 #{image.path} -v quiet)
    if $?.success?
      images << image
    else
      raise Error, "ERROR: unable to capture screenshot at #{percent}% into the video"
    end
  end

  images
end

#populate_result! ⇒ Object 



20
21
22
23
24
25
 
# File 'lib/videoinfo/video.rb', line 20

def populate_result!
  result.mediainfo       = read_mediainfo
  result.screenshot_urls = capture_screenshots.map { |ss| Videoinfo.upload_screenshot(ss) }

  result
end

#read_mediainfo ⇒ Object

Raises:



27
28
29
30
31
32
33
34
 
# File 'lib/videoinfo/video.rb', line 27

def read_mediainfo
  raise Error, "#{file}: file not found" unless File.file?(file)

  info = Dir.chdir(File.dirname(file)) { %x(#{Videoinfo.mediainfo_binary} #{File.basename(file).shellescape}) }
  raise Error, 'unable to read mediainfo' unless $?.success?

  info
end