Hopefully I'm ok asking this here (I was going to put it on SO, but decided it was probably better placed here)
I've done a fair bit of Googling, to try and figure this out myself - but am not coming up with anything. I've installed pngquant using:
sudo apt-get install pngquant
Thats ok - apart from the version number:
pngquant, version 1.0 of 5 April 2002, by Greg Roelofs.
Compiled with libpng 1.2.46; using libpng 1.2.49.
Compiled with zlib 1.2.3.4; using zlib 1.2.7.
From what I have read, we need to be using version 2.0 (as 1.0 is quite lossy and the version is over 10 years old). How do you go about forcing it to use the latest one? I'm on Debian 7 , if that's any help.
UPDATE I've decided to keep with the 1.0 version (as I'm not comfortable upgrading to Debian 8.1 yet). However, the silly thing is refusing to work:
root@#serever: pngquant -ext .png -force 256 test.png
pngquant, version 1.0 of 5 April 2002, by Greg Roelofs.
Compiled with libpng 1.2.46; using libpng 1.2.49.
Compiled with zlib 1.2.3.4; using zlib 1.2.7.
usage: pngquant [options] <ncolors> [pngfile [pngfile ...]]
[options] -map mapfile [pngfile [pngfile ...]]
options:
-force overwrite existing output files
-ordered use ordered dithering (synonyms: -nofloyd, -nofs)
-verbose print status messages (synonyms: -noquiet)
Quantizes one or more 32-bit RGBA PNGs to 8-bit (or smaller) RGBA-palette
PNGs using either ordered dithering or Floyd-Steinberg diffusion dithering
(default). The output filename is the same as the input name except that
it ends in "-fs8.png" or "-or8.png" (unless the input is stdin, in which
case the quantized image will go to stdout). The default behavior if the
output file exists is to skip the conversion; use -force to overwrite.
NOTE: the -map option is NOT YET SUPPORTED.
As you can see, all it does (no matter what args I pass in), is spit out the help file! I've tried the basics of :
pngquant foo.png
...but the same thing. Any ideas?
