Screenshot a random channel from your HDHomeRun device

hdhomerun-screenshot.rb

#!/usr/bin/env ruby

require 'net/http'
require 'json'

# hdhomerun device ASDF found at 10.0.1.1
hdhomerun_discover = `hdhomerun_config discover | head -1`
hdhomerun_ip = hdhomerun_discover.split(' ').last

lineup = JSON.parse(Net::HTTP.get(URI("http://#{hdhomerun_ip}/lineup.json")))
lineup_clear = lineup.reject{|c| c['DRM'] == 1}
lineup_hd = lineup_clear.select{|c| c['HD'] == 1}

$stderr.puts "#{lineup.length} channels"
$stderr.puts "#{lineup_clear.length} non-DRM channels"
$stderr.puts "#{lineup_hd.length} non-DRM HD channels"

channel = lineup_hd.sample

filename = "#{Time.now.strftime("%Y-%m-%d-%H-%M-%S")}-#{channel['GuideName']}.png"

$stderr.puts channel.inspect

`curl -o test.ts #{channel['URL']}?duration=2`
`ffmpeg -i test.ts -ss 00:00:01 -vf "yadif=0:-1:0" -vframes 1 "#{filename}"`

$stderr.puts filename