How to convert 32bit PNG file to 24bit PNG file using PHP.
btw I am using Codeigniter, and planning to host files at Dreamhost.
Thanks!
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1Can you use ImageMagick? – Pekka Oct 05 '11 at 08:41
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probably, I am just reading http://www.imagemagick.org/Usage/formats/#png_formats – Nemanja Srećković Oct 05 '11 at 08:43
1 Answers
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Give this a try:
exec('convert -depth 24 /path/to/old/image.png /path/to/new/image.png');
There is a PEAR package for ImageMagick, although making a system call also works if your hosting provider hasn't installed the PEAR package.
Julian H. Lam
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`system('convert -depth 24 order/41/4e8e99f15be6f/png-export.png order/41/4e8e99f15be6f/png-export-24.png');`, what is strange I get this error **FPDF error: 16-bit depth not supported: order/41/4e8e99f15be6f/png-export-24.png** – Nemanja Srećković Oct 07 '11 at 18:14
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4-depth 24 is not correct. The depth refers to bits-per-sample, and you want 8 not 24. The simplest way to request RGB888 from ImageMagick is "convert old.png png24:new.png" – Glenn Randers-Pehrson Mar 28 '14 at 22:20