Re: [SLUG] MP3 inflation

From: Eben King (eben01@verizon.net)
Date: Wed Jan 17 2007 - 00:04:55 EST


On Tue, 16 Jan 2007, Chuck Hast wrote:

> On 1/16/07, Ron Youvan <ka4inm@tampabay.rr.com> wrote:
>> >> >> I have been moving some music from CD's to a HD I have.
>> >> >> I notice that on the CD it is one size but as the file is moved to
>> >> >> the HD it grows larger,
>>
>> >> Chuck, when you say "moving" are you using the copy (cp) command, or
>> >> loading the MP3 file into an application, then saving it to the hard
>> >> drive? There should be very little difference if you copy. But if you
>> >> load the MP3 file into an application and save, then you are actually
>> >> decompressing the file, then recompressing - that could make a huge
>> >> difference in file size.
>>
>> > Ken when I stick the CD in the drive I get a window that ask me if I want
>> > to open it, play it, rip it, play it with (gives the usual list of
>> > guilty ones).
>>
>> We are going to figure out if we are talking about a "music CD" which
>> contains wav files or a DATA CD that contains mp3 files.
>>
>> Music CDs are not mounted, they are ripped to the hard drive,
>> and unless they are converted on the fly they land as wav files.
>> DATA CD that contains mp3 files must be mounted before being accessed,
>> then they are handled the same as text or program files.
>>
>> The same song as a wav file will be on teh oprdder of 25 to 50 Megs
>> and as a mp3 it would be 2-5 Meg depending on sample rate and other
>> settings.
>
> OK, now I am konfused... This CD as most of the ones I have has in the
> parent directory WAV files then there are directories for CDDB, MP3
> OGG and one more format.

What you're seeing is the result of some program interpreting the audio
data on the CD, and presenting it as if it were a real filesystem, while
doing stuff on demand to satisfy your "cp"s etc. Sorta like /proc in that
respect.

> I tried to mount the things, but no joy, but the system would open them
> and mount them under system. In fact it was as folllows:
> system://media/hdc

Further evidence that it's not really mounted.

> I looked at it from every direction and still could not get it to mount, on
> my own. Anyhow, I figured out how to get the MP3's off without the in-
> flation, I will continue to figure it out but at least I can get the files
> now.

Good job. Now mimize the bitrate, as long as you don't hear flaws in the
sound.

-- 
-eben     QebWenE01R@vTerYizUonI.nOetP     royalty.no-ip.org:81

Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." -- Albert Einstein ----------------------------------------------------------------------- This list is provided as an unmoderated internet service by Networked Knowledge Systems (NKS). Views and opinions expressed in messages posted are those of the author and do not necessarily reflect the official policy or position of NKS or any of its employees.



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