Script that allows to convert pdf file to avi using ffmpeg

pdf2avi.rb

require 'RMagick'
require 'fileutils'

def clean_temp(dir)
  FileUtils.rm_rf(dir) if File.exists?(dir)
end

pdf = Magick::ImageList.new("input.pdf")
dir = './temp'

clean_temp(dir)
Dir.mkdir(dir)

FileUtils.rm_f('output.mp4')

pdf.each_with_index do |page, index|  
  # Duplicate first slide to prevent ffmpeg bug
  page.write("#{dir}/img#{index}.jpg") if index.zero?
	page.write("#{dir}/img#{index + 1}.jpg")
end

`ffmpeg -y -f image2 -r 1/15 -i ./temp/img%d.jpg -c:v libx264 output.mp4`