Image::Magick and JPEG Compression

OzzyOsbourne has asked for the wisdom of the Perl Monks concerning the following question:

I loaded the Image::Magick module, and wanted to create a compressed JPEG. I thought this would be easy, but I'm missing something. I can write JPEGs, just not compressed ones.

$image->Write(filename=>$file,compression=>'JPEG',quality=>'10')

I checked the docs, and I checked google, but I can't seem to find a straight answer on what may be going wrong. Is there a module that I'm missing to get this to work on a win2k box?

Thanks in advance.

-OzzyOsbourne

Comment on Image::Magick and JPEG Compression Download Code

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Re: Image::Magick and JPEG Compression by webfiend (Vicar) on Jun 07, 2002 at 19:20 UTC
I might be missing something myself, but isn't JPEG a compressed format itself? If that were the case, wouldn't fiddling with the `quality` parameter result in different levels of compression? A quick scan of google didn't show me anything to set "jpeg" apart from "compressed jpeg" - most links were describing jpegs as compressed when compared to formats such as bitmap. "All you need is ignorance and confidence; then success is sure."-- Mark Twain	[reply]
Re: Image::Magick and JPEG Compression by beernuts (Pilgrim) on Jun 07, 2002 at 21:38 UTC
What do you get for an error? Try: `my $x = $image->Write(filename=>$file,compression=>'JPEG',quality=>'10 +'); warn "$x" if "$x"; $x =~ /(\d+)/; print "ERROR: [$1]\n";` [download] You can get the error codes (as well as the above error example) here: http://www.imagemagick.org/www/perl.html This might be useful too, as you're using Win2K: http://www.dylanbeattie.net/magick/ -beernuts	[reply] [d/l]


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