On 1/16/07, Eben King <eben01@verizon.net> wrote:
> Sorry, I don't have the original article.
>
> On Sat, 13 Jan 2007, Chuck Hast wrote:
>
> > On 1/13/07, Chris Mathey <slug@mathey.org> wrote:
> >> Chuck Hast 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, here is a example, MP3 file that was 2.4MB on the CD when moved
> >> > to the HD grew to 3.7MB. Is this a function of compression on the CD or
> >> > am I seeing something else?
>
> There is no compression on a CD generally; most CD/MP3 players can't read it
> if there is. MP3s wouldn't compress much anyhow. Try doing "stat
> sourcefile destfile" and see what turns up.
>
> >> > By the way, the size is not a direct relationship, one file which is
> >> > 4MB on the CD is 5.9MB when copied to the HD, another which is also 4M
> >> > on the CD is 5MB on the HD.
>
> Well, one "4MB" may be the result of rounding down from 4.4 MB and the other
> up from 3.6 MB, a 22% difference swept under the rug. One digit's too small
> to draw any conclusions. Unless it's really 4.0MB in both initial cases;
> then I have nothing.
>
> >> > I am assuming there is some compression issue here because I have noted
> >> > that moving a MP3 file from a CD to a HD takes a whole lot longer to do
> >> > then say moving a file off of for example a CD of Linux stuff.
>
> Could be Linux doesn't handle FAT32 (is that what it is?) on a CD well.
>
> >> Maybe it's just a difference in block size between file systems?
>
> That would imply the blocksize on the destination filesystem is much bigger
> than the blocksize on the CD, which is probably not the case. BTW, it's
> FAT32 on the CD, right? What in the destination?
>
> > Maybe, I am still trying to figure it out.
>
Eben,
See a later post on this, I found out later on that audio CD's as such
are not mountable. And Paul confirmed this. Also saw somewhere that
sometimes the process of moving them off of the audio cd to the HD
may run them through the same set of processes short of actually
playing them and that will cause inflation of the file size. I used K3b
to rip the files off and they were transfered size for size, so I learned
that copying them off, not good, ripping them off good...
-- Chuck Hast -- KP4DJT -- To paraphrase my flight instructor; "the only dumb question is the one you DID NOT ask resulting in my going out and having to identify your bits and pieces in the midst of torn and twisted metal." ----------------------------------------------------------------------- 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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