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badcomputer.org

Sunday, September 24, 2006

New software: flacinfo-rb

I was looking for a way to read tags from flac files for sneetchalizer. After some searching I realized there was no such library for Ruby, and not wanting a dirty hack (like parsing `faad -i` like I do for m4a tags) I decided to write it myself. After writing wmainfo-rb, it was very pleasant to read and implement a _nice_ spec like the Flac spec. The ASF spec is nothing but pain. I have heard that the ID3v2 spec is needlessly comvoluted as well.

Anyway, if you want access to metadata from Flac files, including the seektable and other arcane bits of information, and you want to do it using Ruby then give my library a try. You can read the flacinfo-rb info page on my site or just grab it directly from the rubyforge. I also have plans to port it to Python soon, as there seems not to be a Python Flac library either.

Updated software: sneetchalizer

I also updated the sneetchalizer to use said library, as well as a thousand other little fixes. So, if you want to convert between various audio codecs, or resample your current files, go have a look at sneetchalizer. I have also written an sneetchalizer ebuild that you might like to try. If you do and you have 'flac' in your USE flags then it will depend on flacinfo-rb-0.1.ebuild and if you have 'wma' it will depend on wmainfo-rb-0.3.ebuild.

*.k3b --> *.m3u

One more little chunk of code you may find useful. I like to burn CDs using K3b, but I like to listen to them before I burn them. Before I had to create the tracklisting in K3b, then redo the whole procedure in xmms. Very annoying, so I wrote this code:

file = File.basename(ARGV[0], ".k3b")
system("unzip '#{ARGV[0]}'")
fp = File.open("#{file}.m3u", "w")

IO.foreach("maindata.xml") do |line| 
  outline = line.split[-2].gsub("\"","'") if line =~ /<file/
  if outline 
    fp.write("#{outline.split("'")[1]}\n")
  end
end

fp.close()
File.unlink("maindata.xml")
File.unlink("mimetype")

Use like: $ ruby playlist.rb "My Cool CD.k3b" and it will create "My Cool CD.m3u" so you can listen to your 'CD' before you burn it, or after you've moved it to your car or whatever.

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