make_it_green.rb

#!/usr/bin/env ruby 

require 'fileutils'
require 'json'

puts "Starting"
class String
  def squish
    dup.squish!
  end

  def squish!
    gsub!(/\A[[:space:]]+/, '')
    gsub!(/[[:space:]]+\z/, '')
    gsub!(/[[:space:]]+/, ' ')
    self
  end
end

FileUtils.mkdir_p("attempts")
FileUtils.mv(Dir.glob("out_14*.mp4"), "attempts")

#green = "#2F6C4D"
green = "#3C8563"
#green = "#489876"
similarity = 0.12
blend = 0.11

width = 3111
height = 1944
left = 1450
top = 800

filters = []
#filters << "[1:v]colorkey=0x418260:0.01:0.0[gs0]"
#filters << "[gs0]colorkey=#{green.sub("#", "0x")}:#{similarity}:#{blend}[gs]"
#filters << "[1:v][2:v]overlay[masked]" 
filters << "[1:v]colorkey=#{green.sub("#", "0x")}:#{similarity}:#{blend}[gs]"
filters << "[gs]crop=#{width}:#{height}:#{left}:#{top}[crp]"
filters << "[crp]scale=-1:1000[sc]"
filters << "[0:v][sc]overlay[out]" 

#s = `http post http://logo-booth-camera.ted.com:4567/capture/1`
#image_url = JSON.parse(s)['image']
note = {
  colorkey: {
    green: green,
    blend: blend,
    similarity: similarity
  },
  crop: {
    width: width,
    height: height,
    top: top,
    left: left
  },
  filters: filters
}

  #-i black.png
cmd = %|
ffmpeg  
  -f lavfi
  -i "movie=filename=1.mp4"
  -loop 1
  -r 2
  -i logo_booth_%d.jpg
  -i mask.png
  -filter_complex "#{filters.join(";")}"
  -metadata comment='#{note.to_json}'
  -metadata author="Joshua"
  -map "[out]" 
  -an 
  -y 
  -t 5
  out_#{Time.now.to_i}.mp4
|.squish
puts cmd 
system cmd