Skip to content

Instantly share code, notes, and snippets.

@xiongchiamiov

xiongchiamiov/quality

Created January 20, 2011 08:44
Show Gist options
  • Save xiongchiamiov/787592 to your computer and use it in GitHub Desktop.
Save xiongchiamiov/787592 to your computer and use it in GitHub Desktop.
Download ZIP
determine quality of mp3 files
Raw
quality
#!/usr/bin/env ruby
require 'shellwords'
ARGV.each do |file|
info = %x{mediainfo #{Shellwords.escape(file)}}.split("\n")
if !info.grep(/Variable/).empty?
bitrate = info.grep(/-V (\d+)/){$1}[0]
puts "#{file}: Variable bitrate v#{bitrate}"
elsif !info.grep(/Constant/).empty?
bitrate = info.grep(/([\d\.]+) Kbps/){$1}[0]
puts "#{file}: Constant bitrate #{bitrate}"
end
end
@xiongchiamiov
Copy link
Author

I lost most of my music recently, so while I'm in the process of ripping, I figured I'd re-rip some things I have around in lower qualities. I really couldn't be arsed to look up all these bitrates myself, though, so this is a simple call-and-parse script.

Requires mediainfo and I think Ruby 1.9. Expects you to not pass it anything other than mp3s.

Example (partial) run:
┌─[pearson@Bragi] - [~/music] - [Thu Jan 20, 12:41]
└─[$]> quality Yoko\ Kanno/*/01
Yoko Kanno/Brain Powerd/Brain Powerd - Field of Love/01 - Field of Love.mp3: Constant bitrate 320
Yoko Kanno/Brain Powerd/Brain Powerd OP - In My Dream/01. In My Dream.mp3: Variable bitrate v0
Yoko Kanno/Brain Powerd/Brain Powerd OST 1/01 - Power of The Light.mp3: Constant bitrate 320
Yoko Kanno/Brain Powerd/Brain Powerd OST 2/01. Light of Love.mp3: Constant bitrate 320
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop - Ask DNA Single/01 - WHAT PLANET IS THIS.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop - Limited Edition Boxset/Disc 4/01 - Tank! (Live).mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop - Limited Edition Boxset/Disc 5/01 - Wandering Cowboy with vocals by Ed.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop OST 1/01 - Tank!.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop OST 2 - No Disc/01 - American Money.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy bebop OST 3 - BLUE/01 - BLUE.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop - Tank! THE! BEST!/01 - Tank! (TV stretch).mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop The Movie - FUTURE BLUES/01 - 24hours OPEN.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowboy Bebop - Vitaminless/01 - The Real Folk Blues.mp3: Variable bitrate v0
Yoko Kanno/Cowboy Bebop OSTs/Cowgirl Ed OST/01 - Goodnight Julia.mp3: Variable bitrate v0
Yoko Kanno/Earth Girl Arjuna/Earth Girl Arjuna OST 1/01 - Early Bird.mp3: Variable bitrate v2
Yoko Kanno/Earth Girl Arjuna/Earth Girl Arjuna OST 2/01 - Gold Fish.mp3: Variable bitrate v2

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment