Webp converter plugin reduces quality

Kirby 3
1

Hi,
I’m using the webp converter plugin

But I see that my images are reduced in quality even with these options set :

'kirby3-webp' => true,
'kirby3-webp.quality' => 100,
'kirby3-webp.maxQuality' => 100,
'kirby3-webp.defaultQuality' => 100,

Has anyone seen this before?

2

Tested with a fresh starterkit with same options and a gradient image, same thing. :face_with_raised_eyebrow:

3

Not familiar with the plugin, but it seems there is some automatic lossy/lossless conversion feature which with GD is always lossy. Which image conversion library are you using?

4

Following your advice, I’ve installed Imagick for testing a different library. Same thing, the image is converted containing an aliazing aspect.

To be sure the library is well installed, I’ve wrote print(class_exists('imagick')); and get 1. So that doesn’t come from my installation right ?

But this is not what the doc from rosel-dk says :

Note that gd and ewww doesn’t support this feature. gd can only produce lossy, and will simply do that.

So that’s supposed to work with imagick ?!

5

Oups, sorry, this is working well now with Imagick, I’ve forgot to set

'kirby3-webp.encoding' => 'lossless',

Good to know about this plugin !

6

Mhmm doesn’t seem to work now on server. On php.info, Imagick is enable. Do you know a way to be sure Imagick is well installed on server ? Do we need to set a specifi path on server for the bin ?

I’ve just set 'driver' => 'im',…

7

It might be necessary to point to the binary in your config, yes.