EasyCAP

tv.rb

#!/usr/bin/env ruby
Dir.chdir("#{ENV['HOME']}/Pictures")
rest = 5
device = loop do
  dev = Dir["/dev/video*"].first
  rest -= 1
  break dev if dev || rest == 0
  sleep(5)
end
exit(false) unless device
deint = case ARGV[0]
        when "24" then "scale,pullup,pp=l5,"
        when "30" then "scale,yadif=0,"
        when "60" then "scale,yadif=1,"
        end
exec("mplayer tv:///5 -tv device=#{device}:norm=NTSC_M:width=720:height=480 -vf #{deint}dsize=873:480,eq2,screenshot -hardframedrop")