Download youtube videos with ruby
As you might know, we’ve released Ankoder.net for while now. It lets anyone to download videos into their iPods and various other formats. Scraping the flv url from Youtube HTML isnt exactly easy.
This is how we do it:
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def parse_youtube(url) youtube = "http://www.youtube.com/" # url =~ /(?:http\:\/\/.*youtube.com\/(?:watch\?v=|v\/))?(.*)$/ url =~ /watch\?v=(.*)/ video_id = $1 video_id = video_id.split("&")[0] flv_url = nil open("#{youtube}watch\?v=#{video_id}") do |f| f.each_line do |line| if line =~ /watch_fullscreen\?(.*?)video_id=([\w-]+)&(.*?)&t=([\w-]+)&/ # p line flv_url = "#{youtube}get_video?video_id=#{$2}&t=#{$4};auto" break end end end flv_url end USER_AGENT = %{Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.11) Gecko/20071231 Firefox/2.0.0.11 Flock/1.0.5} IO.popen("curl -o \"#{file_name}\" -L -A \"#{USER_AGENT}\" \"#{parse_youtube(url)}\" 2>&1") |