|
Re: Convert BMP to JPG?
by hawtin (Prior) on Sep 14, 2003 at 08:02 UTC
|
There are so many ways, you need to give more info about
your system and constraints before a best one can be suggested.
Just for starters:
- Lots of CPAN modules, for example ImageMagik, IPG's
JPEG library, NetPBM, libpng (and that's just the
older ones)
- Scipting in GIMP (in Perl of course) via the Gimp::Fu
- On Unix like boxes you can install the pbm/pnm
software and control it with Perl
- On Windows boxes there are lots of graphics manipulation
program that support scripting (I have an old version
of CorelPaint that I sometimes use)
Do you just want BMP to JPG conversion? Do you need to
resample images (change size or colour depth)? Do you need
to control the output quality? What platform are you running on?
Are you the sys admin?
It is certainly better to use Perl for this type of stuff
but exactly how you use it depends on what you are trying
to achieve
| [reply] |
|
|
domm pointed me to
Imager - Perl extension for Generating 24 bit Images
definitely also worth a try.
the main advantage over imagemagick and gd is that it doesn't need any additional programs installed to run (just libpng, libjpeg and libungif).
compiling imagemagick on a distribution without Xfree-RPM (like trustix linux can be a pain in the ass, since it needs lots of X-headers ...
| [reply] |
Re: Convert BMP to JPG?
by Anonymous Monk on Sep 14, 2003 at 10:48 UTC
|
| [reply] |
Re: Convert BMP to JPG?
by Anonymous Monk on Sep 14, 2003 at 09:05 UTC
|
Do you really have to write a script?
If you dont and want to do it the 'lazy' way
use 'bmptoppm' to 'ppmtojpeg'
xluther
| [reply] |
Re: Convert BMP to JPG?
by surrealistfashion (Acolyte) on Sep 14, 2003 at 10:09 UTC
|
with win XP, they convert format when you rename the file if 'show known file types' is set in the folder option.
I converted about 400 bmp's with something simliar to the code on the bottom, my attempts were to change the names to numbers, and change files types.
opendir (PICS, "path/to/pics") || die "";
while ($name = readdir PICS) {
if ($name =~ m/bmp$/i) {
$numb++;
rename $name, $numb . "jpg";
}
}
JPL | [reply]
[d/l] |
|
|
This doesn't convert the file! It just renames it, and windows displays it as the new type because of the extension.
| [reply] |
|
|
oh sweet baby Jesus, that's some scary stuff ( foo.SueMe .... owe micro$oft millions of dollars instantaneously, scary ).
| [reply] |
Re: Convert BMP to JPG?
by zakzebrowski (Curate) on Sep 14, 2003 at 15:24 UTC
|
As a previous node says, it all depends on what you are trying to do. A great freeware windows solution is Ifranview. Simply choose File -> batch -> choose input directory -> add all ; select new output directory -> batch coversion -> jpeg -> (possibly advanced options, where you can crop, resize, color manip, etc.) -> start. It has support for many different types of images (including some very odd ones) and is very powerfull.
----
Zak
| [reply] |
Re: Convert BMP to JPG?
by bart (Canon) on Sep 15, 2003 at 07:57 UTC
|
The IJG JPEG library source, which is, BTW , the JPEG library all the mentioned open source image manipulation uses, comes with some command line tools, including cjpeg. The quality is excellent, I can testify for that.
If you look around, you can find binaries for many platforms, for example, here are the 32-bit DOS binaries, and I'm sure Cygwin binary versions are available for download somewhere, too. | [reply] |
Re: Convert BMP to JPG?
by rjahrman (Scribe) on Sep 14, 2003 at 15:53 UTC
|
Thanks all! I decided to go with IFranView. That really saved me a headache. :) | [reply] |