Class: DragonflyVideo::Processors::Optimize

Inherits:
BaseProcessor show all
Defined in:
lib/dragonfly_video/processors/optimize.rb

Constant Summary

Constants inherited from BaseProcessor

BaseProcessor::FFMPEG_COMMAND

Instance Method Summary collapse

Instance Method Details

#call(content, options = {}) ⇒ Object 



6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# File 'lib/dragonfly_video/processors/optimize.rb', line 6

def call(content, options = {})
  raise "optimize only supports mp4" unless content.ext == "mp4"

  profile = options.fetch(:profile, :default).to_sym

  case profile
  when :streaming
    crf = 26
    maxrate = "4000k"
    bufsize = "8000k"
    gop = 96
    profile_v = "main"
    preset = "fast"
  when :archive
    crf = 18
    maxrate = nil
    bufsize = nil
    gop = nil
    profile_v = "high"
    preset = "slow"
  when :mobile
    crf = 28
    maxrate = "1500k"
    bufsize = "3000k"
    gop = 48
    profile_v = "baseline"
    preset = "fast"
  else # Default
    crf = 24
    maxrate = nil
    bufsize = nil
    gop = nil
    profile_v = "main"
    preset = "medium"
  end

  maxrate_option = maxrate ? "-maxrate #{maxrate} -bufsize #{bufsize}" : ""
  gop_option = gop ? "-g #{gop}" : ""

  content.shell_update do |old_path, new_path|
    "#{FFMPEG_COMMAND} -y -i #{old_path} #{gop_option} -map_metadata -1 -c:a aac -c:v libx264 -crf #{crf} -preset #{preset} -profile:v #{profile_v} -pix_fmt yuv420p -movflags +faststart -vf 'scale=trunc(iw/2)*2:trunc(ih/2)*2' #{maxrate_option} #{new_path}"
  end
end