From: jonty <jontyjont@...>
Date: 2008-01-25T04:09:46+09:00
Subject: Re: [OT] Re: Looking for code to determine length of audio files

I have just yesterday tried a script using mp3info, which worked a treat 
identifying some music files and giving their length
even though their was no tag data. Hope this helps.

require 'mp3info'


Dir.chdir("C:/Mymusic)
musicdir=Dir.glob("*.mp3")
musicdir.sort
out=""
musicdir.each do |f|
  Mp3Info.open(f) do |mp3|
    l=mp3.length
    mins=l.divmod(60)
    if mins[0]==0
      ln=mins[1].round.to_s+" secs"
    else
      ln=mins[0].to_s+ " minutes, "+mins[1].round.to_s+" seconds"
    end
    fl=mp3.filename
   
    out+= fl + "    length:    "+ln+"\n\n"

    end
  end
 
 f= File.open("musicinfo.txt","w")
 f.write(out)
 f.close



Rick DeNatale wrote:
> On 1/18/08, ara.t.howard <ara.t.howard@gmail.com> wrote:
>   
>> On Jan 18, 2008, at 6:47 PM, Rick DeNatale wrote:
>>
>>     
>>> I'm working on a project which has the requirement to automatically
>>> determine the runtime of audio files in several formats, right now mp3
>>> and aac.
>>>       
>
>   
>> cfp:~/src/ruby > mp3info -p "%S seconds\n" /Users/ahoward/mp3/hot\
>> chip\ -\ crap\ kraft\ dinner.mp3
>> 394 seconds
>>     
>
> Where does this mp3info come from?  I installed mp3info from
> http://ruby-mp3info.rubyforge.org/ following Carlo's lead, but it
> doesn't seem to have a command line component.
>
> But looking at an example of the podcast I need to handle, in both mp3
> and aac format, neither seems to have any duration related tags.
>
> So I guess I need to figure out if there's any way to compute the duration.
>
> Any ideas anyone?
>
>